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1. Abandoned petroleum wells as sustainable sources of geothermal energy

Author:
Templeton, J.D.; Ghoreishi-Madiseh, S.A.; Hassani, F.; Al-Khawaja, M.J.
Source:
Energy 2014 v.70 pp. 366-373
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; convection; energy conservation; equations; finite element analysis; geothermal energy; groundwater flow; heat pumps; insulating materials; mass flow; mathematical models; petroleum; temperature; thermal conductivity; wells; Persian Gulf;     Show all 16 Subjects
Abstract:
... A reliable heat transfer model was developed to determine the performance of a double pipe heat exchanger retrofitted to an abandoned petroleum well. The proposed model is compared against an analytical heat transfer model and two numerical models, in order to determine the reliability and accuracy of the proposed model. Rock mass properties and well dimensions are based on realistic averages, wit ...
DOI:
10.1016/j.energy.2014.04.006

2. Abatement of Fine Particle Emissions from a Coal-Fired Power Plant Based on the Condensation of SO3 and Water Vapor

Author:
Wu, Hao; Pan, Danping; Zhang, Rui; Yang, Linjun; Peng, Ziming; Yang, Bing
Source:
Energy & Fuels 2017 v.31 no.3 pp. 3219-3226
ISSN:
1520-5029
Subject:
heat exchangers,   etc   ; atomization; coal; dewpoint; flue gas; flue gas desulfurization; humidity; particulate emissions; power plants; temperature; water vapor;     Show all 11 Subjects
Abstract:
... A new process was proposed to reduce fine particle emissions in coal-fired flue gases via the condensation of SO₃ and water vapor. In this new process, hot atomized water was sprayed before the electrostatic precipitator (ESP) system to decrease the flue gas temperature and increase the flue gas humidity, causing the flue gas temperature to drop below the acid dew point; thus, SO₃ would condense o ...
DOI:
10.1021/acs.energyfuels.6b03069

3. Ability of adjusting heating/power for combined cooling heating and power system using alternative gas turbine operation strategies in combined cycle units

Author:
Huang, Zhifeng; Yang, Cheng; Yang, Haixia; Ma, Xiaoqian
Source:
Energy conversion and management 2018 v.173 pp. 271-282
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; absorption; carbon dioxide; cooling; energy conservation; exergy; generators (equipment); heat recovery; natural gas; primary energy; steam; temperature; turbines; vanes; China;     Show all 15 Subjects
Abstract:
... Gas turbine combined cycle (GTCC) based combined cooling, heating and power (CCHP) or combined heating and power (CHP) system driven by natural gas is encouraged to set up for district heating/cooling demand in China due to the clean and efficient energy conversion. This paper presents a GTCC based CCHP system, which consists of a heavy-duty gas turbine, triple-pressure heat recovery steam generat ...
DOI:
10.1016/j.enconman.2018.07.062

4. A bio-based ‘green’ process for catalytic adipic acid production from lignocellulosic biomass using cellulose and hemicellulose derived γ-valerolactone

Author:
Han, Jeehoon
Source:
Energy conversion and management 2016 v.129 pp. 75-80
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; adipic acid; biomass; carbon; cellulose; combustion; corn stover; economic analysis; energy; energy requirements; feedstocks; hemicellulose; lignin; lignocellulose; manufacturing; nylon; prices; solvents;     Show all 18 Subjects
Abstract:
... A bio-based ‘green’ process is presented for the catalytic conversion of corn stover to adipic acid (ADA) based on experimental studies. ADA is used for biobased nylon 6.6 manufacturing from lignocellulosics as carbon and energy source. In this process, the cellulose and hemicellulose fractions are catalytically converted to γ-valerolactone (GVL), using cellulose and hemicellulose-derived GVL as a ...
DOI:
10.1016/j.enconman.2016.10.019

5. A block matrix formulation for efficient g-function construction

Author:
Dusseault, Bernard; Pasquier, Philippe; Marcotte, Denis
Source:
Renewable energy 2018 v.121 pp. 249-260
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; algorithms; equations; models; renewable energy sources;     Show all 5 Subjects
Abstract:
... A compact block matrix formulation allowing fast construction of the g-function of a ground heat exchanger is presented. This new formulation is nor sequential nor iterative, doesn't require use of Laplace or Fourier transform and provides a g-function by solving a single system of linear equations assembled in a block matrix system. A method to accelerate the integration of the finite-line source ...
DOI:
10.1016/j.renene.2017.12.092

6. Absorption heat exchangers for long-distance heat transportation

Author:
Xie, Xiaoyun; Jiang, Yi
Source:
Energy 2017 v.141 pp. 2242-2250
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; absorption; heat; industrial wastes; industry; pipelines; temperature; transportation;     Show all 8 Subjects
Abstract:
... A novel system for long-distance heat transportation that uses two types of absorption heat exchanger (AHE) is introduced in this paper. Using this system, industrial waste heat at 65–70 °C can be recovered and transported through long-distance pipelines. The Transportation Temperature Difference (TTD) can be doubled compared with ordinary system that is based on conventional heat exchangers. Cons ...
DOI:
10.1016/j.energy.2017.11.145

7. Absorption heat pump cycles with NH3 – ionic liquid working pairs

Author:
Wang, Meng; Infante Ferreira, Carlos A.
Source:
Applied energy 2017 v.204 pp. 819-830
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; absorbents; absorption; ammonia; aqueous solutions; buildings; economic feasibility; heat pumps; heat transfer; ionic liquids; molecular weight; refrigeration; solubility; specific heat;     Show all 14 Subjects
Abstract:
... Ionic liquids (ILs), as novel absorbents, draw considerable attention for their potential roles in replacing water or LiBr aqueous solutions in conventional NH3/H2O or H2O/LiBr absorption refrigeration or heat pump cycles. In this paper, performances of 9 currently investigated NH3/ILs pairs are calculated and compared in terms of their applications in the single-effect absorption heat pumps (AHPs ...
DOI:
10.1016/j.apenergy.2017.07.074

8. A case study of a typical 2.32kWP stand-alone photovoltaic (SAPV) in composite climate of New Delhi (India)

Author:
Chel, Arvind; Tiwari, G.N.
Source:
Applied energy 2011 v.88 no.4 pp. 1415-1426
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; case studies; climate; electricity costs; energy; life cycle costing; power generation; summer; weather; winter; India;     Show all 11 Subjects
Abstract:
... This paper presents rigorous experimental outdoor performance of a 2.32kWP stand-alone photovoltaic (SAPV) system in New Delhi (India) for four weather types in each month such as clear, hazy, partially cloudy/foggy and fully cloudy/foggy weather conditions respectively. The daily power generated from the existing SAPV system was experimentally found in the range of 4–6kWh/day depending on the pre ...
DOI:
10.1016/j.apenergy.2010.10.027

9. A catalytic biofuel production strategy involving separate conversion of hemicellulose and cellulose using 2-sec-butylphenol (SBP) and lignin-derived (LD) alkylphenol solvents

Author:
Kim, Sunghoon; Han, Jeehoon
Source:
Bioresource technology 2016 v.204 pp. 1-8
ISSN:
0960-8524
Subject:
heat exchangers,   etc   ; biofuels; biomass; cellulose; combustion; energy requirements; fuel production; gasoline; hemicellulose; levulinic acid; lignin; lignocellulose; solvents; sulfuric acid; xylose;     Show all 15 Subjects
Abstract:
... A strategy in which the hemicellulose and cellulose fractions of lignocellulosic biomass are converted separately to jet fuel-range liquid hydrocarbon fuels (butene oligomers) through catalytic processes is developed. Dilute sulfuric acid (SA)-catalyzed pretreatment fractionates the first biomass into cellulose and hemicellulose-derived xylose, and these are then converted separately to levulinic ...
DOI:
10.1016/j.biortech.2015.12.075

10. Accounting for local thermal and hydraulic parameters of water fouling development in plate heat exchanger

Author:
Kapustenko, Petro O.; Klemeš, Jiří Jaromír; Matsegora, Oleksandr I.; Arsenyev, Pavlo Y.; Arsenyeva, Olga P.
Source:
Energy 2019 v.174 pp. 1049-1059
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; chemical reactions; computer software; computers; differential equation; fouling; heat transfer; industry; mathematical models;     Show all 9 Subjects
Abstract:
... The complex phenomenon of fouling when heating water solutions can significantly hamper the performance of heat exchangers. The fouling process is considered in an application for a plate heat exchanger (PHE) with enhanced heat transfer that proved to have much lower fouling tendencies than conventional shell and tube heat exchangers. To eliminate the drawbacks of the dimensional fouling model for ...
DOI:
10.1016/j.energy.2019.03.026

11. Accuracy of borehole thermal resistance calculation methods for grouted single U-tube ground heat exchangers

Author:
Javed, Saqib; Spitler, Jeffrey
Source:
Applied energy 2017 v.187 pp. 790-806
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; algorithms; heat tolerance; heat transfer;     Show all 4 Subjects
Abstract:
... The borehole thermal resistance – that is, the thermal resistance between the fluid in the U-tube and the borehole wall – is both a key performance characteristic of a closed-loop borehole ground heat exchanger and an important design parameter. Lower borehole thermal resistance leads to better system performance and/or lower total borehole length and possibly lower installation costs. Borehole th ...
DOI:
10.1016/j.apenergy.2016.11.079

12. A CFD model as a tool to simulate β-lactoglobulin heat-induced denaturation and aggregation in a plate heat exchanger

Author:
Bouvier, Laurent; Moreau, Anne; Ronse, Gilles; Six, Thierry; Petit, Jeremy; Delaplace, Guillaume
Source:
Journal of food engineering 2014 v.136 pp. 56-63
ISSN:
0260-8774
Subject:
heat exchangers,   etc   ; beta-lactoglobulin; chemical reactions; denaturation; fouling; heat transfer; hydrodynamics; mathematical models; milk; pasteurization; protein denaturation;     Show all 11 Subjects
Abstract:
... During the pasteurization process, the thermal treatment of milk and its derivatives in plate heat exchangers is limited by protein fouling. The deposition mechanism onto the heat transfer surface involves the denaturation and aggregation of β-lactoglobulin. In this work, a 2-D CFD analysis was conducted to simulate locally the heat-induced protein denaturation mechanisms. Firstly, we present vari ...
DOI:
10.1016/j.jfoodeng.2014.03.025

13. Achievement of Geothermal Energy Using Ground Heat Exchanger in Ma'En

Author:
Al-Dabbas, Mohammed Awwad Ali
ISSN:
2048-4070
Subject:
heat exchangers,   etc   ; buildings; climate; computer software; energy; equations; feasibility studies; fossil fuels; geothermal energy; heat; homeowners; households; momentum; weather; Jordan;     Show all 15 Subjects
Abstract:
... Geothermal energy in Jordan is a low-emission and renewable source that could provide households and commercial buildings with both heating and cooling. Access to this ‘free’ energy may be available just a few feet underground. Thus, the objectives of this research are: Designing ground heat exchanger to utilize geothermal energy in heating in which the primary geothermal fluid is exchanged with s ...
DOI:
10.1260/0958-305X.22.8.1029

14. Acid condensation and heat transfer characteristics on H-type fin surface with bleeding dimples and longitudinal vortex generators

Author:
Wang, Yu-Chen; Tang, Gui-Hua
Source:
Chinese science bulletin 2014 v.59 no.33 pp. 4405-4417
ISSN:
1001-6538
Subject:
heat exchangers,   etc   ; mathematical models; corrosion; temperature; heat transfer; water vapor;     Show all 6 Subjects
Abstract:
... Acid condensation rate is an important factor denoting the acid corrosion, and the reduction of the acid condensation can significantly relieve the acid corrosive effect on the wall surface and improve the security of the equipments. In this study, the characteristics of both heat transfer and acid condensation of the finned tube in heat exchanger were numerically studied. In the numerical model, ...
DOI:
10.1007/s11434-014-0564-3

15. A combined Dual Hot-Gas Bypass Defrosting method with accumulator heater for an air-to-air heat pump in cold region

Author:
Kim, Jaehong; Choi, Hwan-Jong; Kim, Kyung Chun
Source:
Applied energy 2015 v.147 pp. 344-352
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; frost; heat pumps; temperature;     Show all 4 Subjects
Abstract:
... The Dual Hot-Gas Bypass Defrosting (DHBD) cycle is an effective defrosting method compared to a Reverse Cycle Defrosting (RCD) method to remove frost from the outdoor heat exchanger (HEX) of an air-to-air heat pump, especially the outdoor temperature is above 0°C. However, the DHBD method has a drawback when the heat pump operates in cold outdoor environment, below 0°C due to rapid decrease in ref ...
DOI:
10.1016/j.apenergy.2015.02.074

16. A combined experimental and simulation study on charging process of Erythritol–HTO direct-blending based energy storage system

Author:
Wang, Weilong; He, Shiquan; Guo, Shaopeng; Yan, Jinyue; Ding, Jing
Source:
Energy conversion and management 2014 v.83 pp. 306-313
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; erythritol; heat transfer; heaters; hydrologic cycle; industrial wastes; liquid-solid interface; melting; oils; solar energy; thermal energy;     Show all 11 Subjects
Abstract:
... Thermal energy storage (TES) system is essential to recover and use intermittent heat, such as industrial waste/excess heat or solar energy. In this paper, a direct-contact erythritol/heat transfer oil (HTO) energy storage system has been studied experimentally, consisting of a thermal energy storage unit, electrical heaters, heat exchanger and water cycle. In the system, erythritol has been used ...
DOI:
10.1016/j.enconman.2014.03.054

17. A combined method for surface selection and layer pattern optimization of a multistream plate-fin heat exchanger

Author:
Wang, Zhe; Li, Yanzhong
Source:
Applied energy 2016 v.165 pp. 815-827
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air; entropy; friction; heat transfer; models; temperature;     Show all 7 Subjects
Abstract:
... In the design of multistream plate-fin heat exchangers (MPFHEs), surface selection and layer pattern optimization have been investigated as two independent problems and still remain at the empirical stage, which becomes an obstacle for optimizing the performance of MPFHEs. A combined method of the equipartition of entropy production and the balance of local heat load is proposed in the present res ...
DOI:
10.1016/j.apenergy.2015.12.118

18. A combined numerical and visualization tool for utility targeting and heat exchanger network retrofitting

Author:
Abbood, Nabeel K.; Manan, Zainuddin A.; Wan Alwi, Sharifah R.
Source:
Journal of cleaner production 2012 v.23 no.1 pp. 1-7
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; algorithms; case studies; energy efficiency; heat; palm oils; streams; temperature;     Show all 8 Subjects
Abstract:
... In synthesizing optimal heat recovery networks, Composite Curve (CC) plots and Problem Table Algorithms (PTAs) have been the most popular tools for determining the minimum energy targets, whereas Grid Diagrams (GDs) have been widely utilized for heat exchanger network (HEN) design. However, CCs are cumbersome to construct. Additionally, PTAs offer numerical advantages but little insight into the i ...
DOI:
10.1016/j.jclepro.2011.10.020

19. A comparative exergoeconomic analysis of different ORC configurations for binary geothermal power plants

Author:
Zare, V.
Source:
Energy conversion and management 2015 v.105 pp. 127-138
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; economic investment; geothermal energy; models; power plants; profitability; thermodynamics;     Show all 7 Subjects
Abstract:
... The main goal of this research is to investigate and compare the performance of three configurations of organic Rankine cycle (ORC) for binary geothermal power plants from the viewpoints of both thermodynamics and economics. The considered configurations are: Simple organic Rankine cycle (S-ORC), Regenerative organic Rankine cycle (R-ORC) and organic Rankine cycle with Internal Heat Exchanger (ORC ...
DOI:
10.1016/j.enconman.2015.07.073

20. A Comparative Exergoeconomic Analysis of Waste Heat Recovery from a Gas Turbine-Modular Helium Reactor via Organic Rankine Cycles

Author:
Shokati, Naser; Mohammadkhani, Farzad; Yari, Mortaza; Mahmoudi, Seyed M. S.; Rosen, Marc A.
Source:
Sustainability 2014 v.6 no.5 pp. 2474-2489
ISSN:
2071-1050
Subject:
heat exchangers,   etc   ; electricity; electricity generation; equations; exergy; helium; temperature; waste heat recovery;     Show all 8 Subjects
Abstract:
... A comparative exergoeconomic analysis is reported for waste heat recovery from a gas turbine-modular helium reactor (GT-MHR) using various configurations of organic Rankine cycles (ORCs) for generating electricity. The ORC configurations studied are: a simple organic Rankine cycle (SORC), an ORC with an internal heat exchanger (HORC) and a regenerative organic Rankine cycle (RORC). Exergoeconomic ...
DOI:
10.3390/su6052474

21. A comparative performance evaluation of the reversed Brayton cycle operated heat pump based on thermo-ecological criteria through many and multi objective approaches

Author:
Patel, Vivek K.; Raja, Bansi D.
Source:
Energy conversion and management 2019 v.183 pp. 252-265
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; algorithms; cold; decision making; ecological function; exergy; heat pumps; heat transfer; system optimization; temperature;     Show all 10 Subjects
Abstract:
... Thermodynamic and ecological performance evaluation of the reversed Brayton cycle operated heat pump is analyzed in this work. Performance assessment of the heat pump is carried out through many-objective as well as multi-objective optimization. Maximization of coefficient of performance, ecological coefficient of performance, exergy efficiency and ecological function of the heat pump are consider ...
DOI:
10.1016/j.enconman.2018.12.109

22. A comparative study of different methods for the generation of tetra-n-butyl ammonium bromide clathrate hydrate slurry in a cold storage air-conditioning system

Author:
Shi, X.J.; Zhang, P.
Source:
Applied energy 2013 v.112 pp. 1393-1402
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; adhesion; air conditioning; aqueous solutions; cold storage; cooling; crystals; refrigerators; slurries; supercooling; temperature;     Show all 11 Subjects
Abstract:
... A cold storage air-conditioning system using tetra-n-butyl ammonium bromide (TBAB) clathrate hydrate slurry (CHS) as cold storage medium was built to investigate the high-efficiency method of TBAB CHS generation. In the present study, four kinds of different TBAB CHS generation methods were experimentally investigated and compared, and these methods included continuously cooling, turning off refri ...
DOI:
10.1016/j.apenergy.2012.12.021

23. A Comparative Study of Fin-And-Tube Heat Exchangers With and Without Liquid-Vapor Separation in Air Conditioning Units

Author:
Chen, Y.; Hua, N.; Wu, D.
Source:
International journal of green energy 2014 v.11 no.5 pp. 488-499
ISSN:
1543-5083
Subject:
heat exchangers,   etc   ; heat; condensers; refrigeration; air conditioning; energy efficiency; temperature;     Show all 7 Subjects
Abstract:
... A novel structure of condensers was introduced in the article. It was composed of finned tube rows with a pair of manifolds at either end. The manifolds not only divided refrigerant into several passes, but also made refrigerant condensate drain away from vapor-liquid mixture automatically after each tube pass. The performances of two refrigeration units fixed this novel condenser and a common one ...
DOI:
10.1080/15435075.2013.770396

24. A comparative study of power optimization in low-temperature geothermal heat source driven R125 transcritical cycle and HFC organic Rankine cycles

Author:
Baik, Young-Jin; Kim, Minsung; Chang, Ki-Chang; Lee, Young-Soo; Yoon, Hyung-Kee
Source:
Renewable energy 2013 v.54 pp. 78-84
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; heat; hydrofluorocarbons; power plants; renewable energy sources; temperature; vapors;     Show all 7 Subjects
Abstract:
... In order to compare the power output of an R125 transcritical cycle with that of HFC subcritical ORCs for a low-temperature geothermal heat source of about 100 °C, an R125 transcritical cycle and subcritical ORCs using R134a, R245fa and R152a were optimized for power output by a simulation method. In contrast to previous studies, to fairly compare the power of different cycles, power optimizations ...
DOI:
10.1016/j.renene.2012.08.055

25. A comparative study of texture and rheology of Argentinian honeys from two regions

Author:
Maldonado, Gerardo E.; Navarro, Alba S.; Yamul, Diego K.
Source:
Journal of texture studies 2018 v.49 no.4 pp. 424-433
ISSN:
0022-4901
Subject:
heat exchangers,   etc   ; centrifuges; differential scanning calorimetry; economic resources; extrusion; filters; foods; glass transition temperature; honey; mathematical models; mixers; packaging; pipes; pumps; quality control; rheology; rheometers; storage modulus; texture; viscosity; wastes; Argentina;     Show all 22 Subjects
Abstract:
... The rheological and textural properties of 26 eastern Argentinian honeys from two different regions (North and Central) were investigated. The viscosity curves of the samples were obtained using a rotational rheometer over a temperature range of 10 to 50C. The viscosity decreased with temperature and all honeys showed a Newtonian behavior. The temperature dependence of viscosity was described usin ...
DOI:
10.1111/jtxs.12349

26. A comparative study on the ammonia–water based bottoming power cycles: The exergoeconomic viewpoint

Author:
Mohammadkhani, Farzad; Ranjbar, Faramarz; Yari, Mortaza
Source:
Energy 2015 v.87 pp. 425-434
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; ammonia; electricity; exergy; temperature;     Show all 5 Subjects
Abstract:
... A comparative exergoeconomic assessment is reported for Ammonia-Water Rankine (AWR) and Ammonia-Water Recuperative Rankine (AWRR) bottoming power cycles. Through investigating temperature distributions of hot and cold fluids and pinch point location in heat exchangers, first energy and exergy analysis is performed and then cost balances and appropriate auxiliary equations are developed for compone ...
DOI:
10.1016/j.energy.2015.05.023

27. A comparison of optimization theories for energy conservation in heat exchanger groups

Author:
Chen, Qun; Wu, Jing; Wang, MoRan; Pan, Ning; Guo, ZengYuan
Source:
Chinese science bulletin 2011 v.56 no.4-5 pp. 449-454
ISSN:
1001-6538
Subject:
heat exchangers,   etc   ; energy conservation; entropy; heat transfer;     Show all 4 Subjects
Abstract:
... In general, thermal processes can be classified into two categories: heat-work conversion processes and heat transfer processes. Correspondingly, the optimization of thermal processes has to have two different criteria: the well known entropy generation minimization method and the recently proposed entransy dissipation maximization method. This study analyzes the thermal issues in a heat exchanger ...
DOI:
10.1007/s11434-010-4297-7

28. A comparison study on energy savings and fungus growth control using heat recovery devices in a modern tropical operating theatre

Author:
Yau, Y.H.; Ng, W.K.
Source:
Energy conversion and management 2011 v.52 no.4 pp. 1850-1860
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air conditioning; air quality; computer software; desiccants; energy; energy recovery; fungi; heat; Malaysia;     Show all 10 Subjects
Abstract:
... Fungus growth has always been a problem in hot and humid areas. This particular problem is crucial for operating theatre as it could affect the success rate of operations. Many postoperative fungus infection cases had occurred in the past, and it is generally agreed that air-conditioning system play a very important role in resolving the fungus growth problem. Besides air quality, the energy consu ...
DOI:
10.1016/j.enconman.2010.12.005

29. A comprehensive exergy evaluation of a deep borehole heat exchanger coupled with a ORC plant: The case study of Campi Flegrei

Author:
C, Alimonti; P, Conti; E, Soldo
Source:
Energy 2019
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; case studies; cooling towers; energy requirements; exergy; geothermal energy; heat; heat tolerance; insulating materials; pipes; power plants; temperature; Italy;     Show all 13 Subjects
Abstract:
... The paper presents a comprehensive energy and exergy analysis of a possible geothermal power plant located in the geothermal district of Campi Flegrei (Italy), made of a coaxial WellBore Heat eXchanger coupled to an Organic Rankine Cycle. We have accounted for all system components: the ground source, the WellBore Heat eXchanger, the Organic Rankine Cycle cycle, and cooling system. The energy and ...
DOI:
10.1016/j.energy.2019.116100

30. A Comprehensive Review of Milk Fouling on Heated Surfaces

Author:
Sadeghinezhad, E.; Kazi, S. N.; Dahari, M.; Safaei, Mohammad Reza; Sadri, Rad; Badarudin, A.
Source:
Critical reviews in food science and nutrition 2015 v.55 no.12 pp. 1724-1743
ISSN:
1549-7852
Subject:
heat exchangers,   etc   ; UHT treatment; additives; chemistry; durability; equipment; fouling; heat transfer; mathematical models; milk; temperature; whey protein;     Show all 12 Subjects
Abstract:
... Heat exchanger performance degrades rapidly during operation due to formation of deposits on heat transfer surfaces which ultimately reduces service life of the equipment. Due to scaling, product deteriorates which causes lack of proper heating. Chemistry of milk scaling is qualitatively understood and the mathematical models for fouling at low temperatures have been produced but the behavior of s ...
DOI:
10.1080/10408398.2012.752343

31. A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids

Author:
Solangi, K.H.; Kazi, S.N.; Luhur, M.R.; Badarudin, A.; Amiri, A.; Sadri, Rad; Zubir, M.N.M.; Gharehkhani, Samira; Teng, K.H.
Source:
Energy 2015 v.89 pp. 1065-1086
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; Reynolds number; convection; cooling systems; nanofluids; nanoparticles; pH; particle size; rheological properties; solar collectors; thermal conductivity; zeta potential;     Show all 12 Subjects
Abstract:
... Nanofluids are fluid nanoparticle suspensions that exhibit enhanced properties at modest nanoparticle concentrations. Nanofluids have unique heat transfer properties and are utilized in high heat flux systems (e.g., electronic cooling systems, heat exchanger liquids, solar collectors, and nuclear reactors). However, suspension stability is critical in the development and application of these heat ...
DOI:
10.1016/j.energy.2015.06.105

32. A computationally efficient pseudo-3D model for the numerical analysis of borehole heat exchangers

Author:
Brunetti, Giuseppe; Saito, Hirotaka; Saito, Takeshi; Šimůnek, Jiří
Source:
Applied energy 2017 v.208 pp. 1113-1127
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; data collection; groundwater; heat pumps; heat transfer; hydrologic models; mechanistic models; porous media; renewable energy sources; soil; solutes; thermal properties; water flow; Japan;     Show all 14 Subjects
Abstract:
... Ground-Source Heat Pump (GSHP) systems represent one of the most efficient renewable energy technologies. Their efficiency is highly influenced by the thermal properties of the ground, which are often measured in-situ using the Thermal Response Tests (TRTs). While three-dimensional mechanistic models offer significant advantages over analytical solutions for the numerical interpretation of TRTs, t ...
DOI:
10.1016/j.apenergy.2017.09.042

33. A conceptual study on air jet-induced swirling plume for performance improvement of natural draft cooling towers

Author:
Lu, Yuanshen; Klimenko, Alexander; Russell, Hugh; Dai, Yuchen; Warner, John; Hooman, Kamel
Source:
Applied energy 2018 v.217 pp. 496-508
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air; air flow; ambient temperature; cooling; cooling towers; energy efficiency; heat; models; momentum; water temperature;     Show all 11 Subjects
Abstract:
... In thermal power cycles including concentrating solar thermal (CST) plants, natural draft cooling towers (NDCTs) are widely used heat-dumping facilities. One inherent drawback of NDCTs is that their cooling performance can be compromised by changes in ambient conditions, particularly temperature, which inevitably reduces the net power output of the cycles. Current methods resolving this issue are ...
DOI:
10.1016/j.apenergy.2018.02.095

34. Adaptive defrost methods for improving defrosting efficiency of household refrigerator

Author:
Yoon, Youngchan; Jeong, Haijun; Lee, Kwan-Soo
Source:
Energy conversion and management 2018 v.157 pp. 511-516
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; control methods; freezers; frost; heaters; refrigerators; temperature;     Show all 7 Subjects
Abstract:
... The defrosting method of the conventional household refrigerator increases freezer temperature during the defrosting operation, and defrosting efficiency reduces because the heater consumes more power than the amount of frost on the surface of the heat exchanger. To solve this problem, three defrost heater control methods, applicable to refrigerators equipped with conduction and radiation heaters, ...
DOI:
10.1016/j.enconman.2017.12.039

35. A demand-oriented approach for integrating earth-to-air heat exchangers into buildings for achieving year-round indoor thermal comfort

Author:
Yang, Dong; Wei, Haibin; Shi, Rui; Wang, Jilibo
Source:
Energy conversion and management 2019 v.182 pp. 95-107
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air temperature; buildings; climatic factors; energy efficiency; fluid mechanics; temperature profiles;     Show all 7 Subjects
Abstract:
... Earth-to-air heat exchanger (EAHE) is a promising energy-efficient technology for indoor thermal environment regulation; however, it should adapt to both building and climatic conditions. This paper proposes a new inverse approach to determine the parameters of EAHE integrating into buildings and to achieve a prescribed indoor thermal comfort objective. First, the criterion for achieving year-roun ...
DOI:
10.1016/j.enconman.2018.12.071

36. A deterministic approach for predicting the transformation of starch suspensions in tubular heat exchangers

Author:
Plana-Fattori, A.; Flick, D.; Ducept, F.; Doursat, C.; Michon, C.; Mezdour, S.
Source:
Journal of food engineering 2016 v.171 pp. 28-36
ISSN:
0260-8774
Subject:
heat exchangers,   etc   ; heat transfer; heat treatment; laboratory techniques; mathematical models; prediction; rheological properties; starch granules; temperature;     Show all 9 Subjects
Abstract:
... Numerical modeling of fluid flow, heat transfer and transformation is conducted for an aqueous suspension of starch granules running throughout a four-heating-section tubular exchanger. The numerical model considers the transformation kinetics and the rheological behavior of the starch suspension as determined from laboratory work; further, the model includes the geometrical characteristics of the ...
DOI:
10.1016/j.jfoodeng.2015.10.002

37. Adiabatic Compressed Air Energy Storage with packed bed thermal energy storage

Author:
Barbour, Edward; Mignard, Dimitri; Ding, Yulong; Li, Yongliang
Source:
Applied energy 2015 v.155 pp. 804-815
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air; compressors; exergy; heat; indirect contact; mathematical models; temperature profiles; thermal energy;     Show all 9 Subjects
Abstract:
... The majority of articles on Adiabatic Compressed Air Energy Storage (A-CAES) so far have focussed on the use of indirect-contact heat exchangers and a thermal fluid in which to store the compression heat. While packed beds have been suggested, a detailed analysis of A-CAES with packed beds is lacking in the available literature. This paper presents such an analysis. We develop a numerical model of ...
DOI:
10.1016/j.apenergy.2015.06.019

38. A direct optimal control strategy of variable speed pumps in heat exchanger networks and experimental validations

Author:
Wang, Yi-Fei; Chen, Qun
Source:
Energy 2015 v.85 pp. 609-619
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; energy conservation; energy use and consumption; physical models; pumps; system optimization; temperature;     Show all 7 Subjects
Abstract:
... Energy conservation of HENs (heat exchanger networks) has been attaching more and more attentions with all kinds of methods for operation optimization. Several methods optimize the temperature and/or pressure differential set points for HENs, but cannot control the components directly, which has to seek the help of some control strategies. This paper introduces a direct optimal control strategy of ...
DOI:
10.1016/j.energy.2015.03.107

39. A discrete and continuous mathematical model for the optimal synthesis and design of dual pressure heat recovery steam generators coupled to two steam turbines

Author:
Manassaldi, Juan I.; Arias, Ana M.; Scenna, Nicolás J.; Mussati, Miguel C.; Mussati, Sergio F.
Source:
Energy 2016 v.103 pp. 807-823
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; generators (equipment); heat recovery; mathematical models; power generation; pumps; turbines;     Show all 7 Subjects
Abstract:
... This paper addresses the optimal arrangement and design of a dual pressure heat recovery steam generator coupled to two steam turbines. A superstructure that embeds various alternative configurations is optimized considering the following two single objective functions: (a) the maximization of the total net power generation for a given total heat transfer area and (b) the minimization of the total ...
DOI:
10.1016/j.energy.2016.02.129

40. A double-pinch criterion for regenerative Rankine cycles

Author:
Zebian, Hussam; Mitsos, Alexander
Source:
Energy 2012 v.40 no.1 pp. 258-270
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; temperature; heaters; heat;     Show all 4 Subjects
Abstract:
... A double-pinch criterion for closed feedwater heaters (FWH) of regenerative Rankine cycles is presented. The FWHs are modeled as counter-current heat exchangers. Thus, two potential pinch positions in the FWH exist: (i) at the exit of the bleed (drain) and (ii) at the onset of condensation. For a given heat duty in the FWH, feed inlet temperature and flowrate, the extraction flowrate and pressure ...
DOI:
10.1016/j.energy.2012.01.074

41. Adsorbent working pairs for solar thermal energy storage in buildings

Author:
Frazzica, Andrea; Freni, Angelo
Source:
Renewable energy 2017 v.110 pp. 87-94
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; activated carbon; adsorbents; adsorption; ammonia; buildings; desorption; ethanol; heat; methanol; silica gel; solar collectors; solar thermal energy; temperature; working conditions; zeolites;     Show all 16 Subjects
Abstract:
... In this study, the thermodynamic analysis of several adsorption working pairs for adsorption heat storage applications at domestic level is presented. The selected working pairs employ different working fluids (i.e. water, ethanol, ammonia, methanol) and different adsorbent materials such as classical zeolites, silica gels, alumino-phosphates, composite sorbents and activated carbons. The simulati ...
DOI:
10.1016/j.renene.2016.09.047

42. Adsorption behavior of beta-lactoglobulin onto stainless steel surfaces

Author:
Kim, J.C.; Lund, D.B.
Source:
Journal of food processing and preservation 1997 v.21 no.4 pp. 303-317
ISSN:
0145-8892
Subject:
heat exchangers,   etc   ; food processing; heat treatment; food processing equipment; fouling;     Show all 5 Subjects
Abstract:
... Nonporous stainless steel particles with an average diameter of 25.5 micrometers and an average surface area of 215 cm2/g were used to study the adsorption of beta-lactoglobulin (beta-lg). Scanning electron microscopy of stainless steel particle surfaces with adsorbed beta-lg showed an obvious eradication of crevices as protein was adsorbed. The adsorption process for beta-lg was very rapid in the ...
DOI:
10.1111/j.1745-4549.1997.tb00785.x

43. Adsorption cooling utilizing the “LiBr/silica – ethanol” working pair: Dynamic optimization of the adsorber/heat exchanger unit

Author:
Gordeeva, Larisa; Frazzica, Andrea; Sapienza, Alessio; Aristov, Yuri; Freni, Angelo
Source:
Energy 2014 v.75 pp. 390-399
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; adsorbents; adsorption; air; air conditioning; cooling; energy conservation; ethanol; geometry; heat transfer; ice; silica; vapors;     Show all 13 Subjects
Abstract:
... Owing to encouraging energy saving potential, adsorption heat transformers are considered as promising alternative to compression systems. However the enhancement of their specific power is required for their broader dissemination. This paper aims at the dynamic optimization of the Ad-HEx (adsorber/heat exchanger) unit operating with the novel working pair “LiBr/silica – ethanol”, which is charact ...
DOI:
10.1016/j.energy.2014.07.088

44. Adsorptive transformation and storage of renewable heat: Review of current trends in adsorption dynamics

Author:
Aristov, Yuri I.
Source:
Renewable energy 2017 v.110 pp. 105-114
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; adsorbents; adsorption; desorption; heat; mass transfer; renewable energy sources; solar radiation; temperature; vapor pressure; winter;     Show all 11 Subjects
Abstract:
... The main shortage of emerging technology of adsorptive transformation and storage (ATS) of heat is a low specific power that leads to large-size units poorly competitive so far with common compression systems. Significant intensification of heat and mass transfer in ATS units would allow an overcoming of this drawback. This is especially urgent for transformations driven by renewable heat sources ...
DOI:
10.1016/j.renene.2016.06.055

45. Advanced exergetic analysis of five natural gas liquefaction processes

Author:
Vatani, Ali; Mehrpooya, Mehdi; Palizdar, Ali
Source:
Energy conversion and management 2014 v.78 pp. 720-737
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air; compressors; coolers; exergy; liquefaction; natural gas;     Show all 7 Subjects
Abstract:
... Conventional exergy analysis cannot identify portion of inefficiencies which can be avoided. Also this analysis does not have ability to calculate a portion of exergy destruction which has been produced through performance of a component alone. In this study advanced exergetic analysis was performed for five mixed refrigerant LNG processes and four parts of irreversibility (avoidable/unavoidable) ...
DOI:
10.1016/j.enconman.2013.11.050

46. Advanced exergoeconomic analysis of the multistage mixed refrigerant systems

Author:
Mehrpooya, Mehdi; Ansarinasab, Hojat
Source:
Energy conversion and management 2015 v.103 pp. 705-716
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air; compressors; coolers; exergy; liquefaction; propane;     Show all 7 Subjects
Abstract:
... Advanced exergoeconomic analysis is applied on three multi stage mixed refrigerant liquefaction processes. They are propane precooled mixed refrigerant, dual mixed refrigerant and mixed fluid cascade. Cost of investment and exergy destruction for the components with high inefficiencies are divided into avoidable/unavoidable and endogenous/exogenous parts. According to the avoidable exergy destruct ...
DOI:
10.1016/j.enconman.2015.07.026

47. Advanced exergy analysis applied to an externally-fired combined-cycle power plant integrated with a biomass gasification unit

Author:
Soltani, S.; Yari, M.; Mahmoudi, S.M.S.; Morosuk, T.; Rosen, M.A.
Source:
Energy 2013 v.59 pp. 775-780
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; biomass; combustion; exergy; gasification; power plants;     Show all 6 Subjects
Abstract:
... An advanced exergy analysis is reported for a recently developed configuration of an externally-fired combined-cycle power plant integrated with biomass gasification. The results identify the potential for improvement of the overall system considering interactions among the components. It is found that interactions between the components are not very strong, i.e. the endogenous exergy destruction ...
DOI:
10.1016/j.energy.2013.07.038

48. Advanced exergy analysis of heat exchanger network in a complex natural gas refinery

Author:
Fard, Mohsen Mehdizadeh-; Pourfayaz, Fathollah
Source:
Journal of cleaner production 2019 v.206 pp. 670-687
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; equations; exergy; natural gas; operating costs;     Show all 5 Subjects
Abstract:
... In this paper, the advanced exergy analysis was used to determine the avoidable and unavoidable exergy destructions of the heat exchanger networks (HENs) in a complex natural gas refinery in the South Pars gas field, focusing only on the improvement of the avoidable part. Exergy balances were evaluated for the HENs and the equations of advanced exergy destruction and exergetic efficiency for the H ...
DOI:
10.1016/j.jclepro.2018.09.166

49. Advanced exergy analysis of novel flash based Helium recovery from natural gas processes

Author:
Mehrpooya, Mehdi; Shafaei, Arash
Source:
Energy 2016 v.114 pp. 64-83
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; compressors; exergy; gases; helium; natural gas;     Show all 6 Subjects
Abstract:
... Two cryogenic Helium recovery processes which are based on the flash separation are investigated and analyzed. The presence of Helium in the natural gas affects shape of its phase envelope. Effect of various components concentration on the natural gas phase envelope shape is investigated. Two modified cryogenic flash based processes are introduced. Two new parameters are proposed in order to evalu ...
DOI:
10.1016/j.energy.2016.07.169

50. Advanced exergy and exergoeconomic analyses of a hydrogen liquefaction plant equipped with mixed refrigerant system

Author:
Ansarinasab, Hojat; Mehrpooya, Mehdi; Mohammadi, Amin
Source:
Journal of cleaner production 2017 v.144 pp. 248-259
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; exergy; hydrogen; liquefaction;     Show all 4 Subjects
Abstract:
... Advanced exergy and exergoeconomic analyses are applied to a hydrogen liquefaction process. These analyses provide information about the origin of irreversibility and also determine the amount of avoidable irreversibility of the system. Results of the advanced exergy analysis show that in all components except turbo expanders, most of the irreversibility is due to the endogenous exergy destruction ...
DOI:
10.1016/j.jclepro.2017.01.014

51. Advancement of distributed energy methods by a novel high efficiency solar-assisted combined cooling, heating and power system

Author:
Zhang, Na; Wang, Zefeng; Lior, Noam; Han, Wei
Source:
Applied energy 2018 v.219 pp. 179-186
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; absorption; carbon dioxide; cooling; electricity; energy recovery; exergy; greenhouse gas emissions; heat; power generation; solar energy; steam; supply balance; synthesis gas; temperature;     Show all 15 Subjects
Abstract:
... To improve the conversion efficiency of renewable energy use in high efficiency novel distributed energy systems, and the match between the energy donors and receivers in them, this paper proposes and analyzes a solar assisted combined cooling, heating and power system which supplies electricity, cooling and heat, with internal energy recovery and thermochemical upgrading, as their core component. ...
DOI:
10.1016/j.apenergy.2018.03.050

52. Advances in autothermal reformer design

Author:
Pasel, Joachim; Samsun, Remzi Can; Tschauder, Andreas; Peters, Ralf; Stolten, Detlef
Source:
Applied energy 2017 v.198 pp. 88-98
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; diesel fuel; electrolytes; fuel cells; hydrocarbons; kerosene; polymers; steam;     Show all 8 Subjects
Abstract:
... Together with the high-temperature polymer electrolyte fuel cell, the reactor for the autothermal reforming (ATR) of liquid hydrocarbons, such as diesel fuel or kerosene, is the key component of the Jülich fuel cell system in the 5kWe power class. This paper presents some of Jülich’s most recent development in the field of ATR reactors, specifically the ATR 12. ATR 12 is characterized by a new con ...
DOI:
10.1016/j.apenergy.2017.04.055

53. Advances in thermal energy storage materials and their applications towards zero energy buildings: A critical review

Author:
Lizana, Jesús; Chacartegui, Ricardo; Barrios-Padura, Angela; Valverde, José Manuel
Source:
Applied energy 2017 v.203 pp. 219-239
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; buildings; energy density; energy efficiency; heat; solar energy; storage; storage time; systems engineering; tanks; temperature; ventilation systems;     Show all 12 Subjects
Abstract:
... Buildings are responsible for one-third of the world’s energy consumption, of which 60% is due to heating and cooling. To accomplish the low-carbon energy goal in the building sector, thermal energy storage offers a number of benefits by reducing energy consumption and promoting the use of renewable energy sources. This manuscript reviews recent advances in the development of thermal energy storag ...
DOI:
10.1016/j.apenergy.2017.06.008

54. 27. Advances towards standardised freezing protocols

Author:
Glasmacher, Birgit; Spindler, Ralf; Pogozhykh, Denys; Hofmann, Nicola
Source:
Cryobiology 2013 v.66 no.3 pp. 349-350
ISSN:
0011-2240
Subject:
heat exchangers,   etc   ; bone formation; cameras; cell suspension culture; cell viability; cooling; copper; cryopreservation; cryoprotectants; dimethyl sulfoxide; endothelial cells; ethidium; freeze-thaw cycles; freezers; freezing; geometry; humans; mesenchymal stromal cells; metabolism; monkeys; nitrogen; sowing; staining; storage temperature; thawing;     Show all 25 Subjects
Abstract:
... In the field of cryopreservation cells are stored at cryogenic temperatures in order to maintain their quality after thawing. Lowering the temperature reduces the metabolism of cells and therefore can prevent their loss of quality over time. During the freezing process different parameters have been identified as cell damaging mechanisms [1]. Thus, a correct setting of process parameters including ...
DOI:
10.1016/j.cryobiol.2013.02.033

55. Advance technology in virgin olive oil production from traditional and de-stoned pastes: Influence of the introduction of a heat exchanger on oil quality

Author:
Amirante, P.; Clodoveo, M.L.; Dugo, G.; Leone, A.; Tamborrino, A.
Source:
Food chemistry 2006 v.98 no.4 pp. 797-805
ISSN:
0308-8146
Subject:
heat exchangers,   etc   ; olive pulp; olive oil; lipid peroxidation; food quality; phenolic compounds; olives; methodology; food processing; food composition; extraction; odor compounds; odors; processing stages;     Show all 14 Subjects
Abstract:
... An experimental investigation was carried out to evaluate the quality of virgin olive oils obtained when a de-stoner were used for the olive paste preparation in comparison to the use of a traditional stone mill. In order to improve the slightly differences of oil yields due to the use of the de-stoner also a heat exchanger has been introduced in the processing line. The experimental data showed t ...
DOI:
10.1016/j.foodchem.2005.07.040

56. Advection and dispersion heat transport mechanisms in the quantification of shallow geothermal resources and associated environmental impacts

Author:
Alcaraz, Mar; García-Gil, Alejandro; Vázquez-Suñé, Enric; Velasco, Violeta
Source:
The Science of the total environment 2016 v.543 pp. 536-546
ISSN:
0048-9697
Subject:
heat exchangers,   etc   ; advection; energy; environmental impact; geographic information systems; geothermal energy; groundwater; heat transfer; methodology; temperature; Spain;     Show all 11 Subjects
Abstract:
... Borehole Heat Exchangers (BHEs) are increasingly being used to exploit shallow geothermal energy. This paper presents a new methodology to provide a response to the need for a regional quantification of the geothermal potential that can be extracted by BHEs and the associated environmental impacts. A set of analytical solutions facilitates accurate calculation of the heat exchange of BHEs with the ...
DOI:
10.1016/j.scitotenv.2015.11.022

57. A dynamic model for the efficiency optimization of an oscillatory low grade heat engine

Author:
Markides, Christos N.; Smith, Thomas C.B.
Source:
Energy 2011 v.36 no.12 pp. 6967-6980
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; cold; dynamic models; heat tolerance; heat transfer; temperature; vapors;     Show all 7 Subjects
Abstract:
... A simple approach is presented for the modeling of complex oscillatory thermal-fluid systems capable of converting low grade heat into useful work. This approach is applied to the NIFTE, a novel low temperature difference heat utilization technology currently under development. Starting from a first-order linear dynamic model of the NIFTE that consists of a network of interconnected spatially lump ...
DOI:
10.1016/j.energy.2011.08.051

58. A dynamic model for thermoelectric generator applied to vehicle waste heat recovery

Author:
Lan, Song; Yang, Zhijia; Chen, Rui; Stobart, Richard
Source:
Applied energy 2018 v.210 pp. 327-338
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; carbon dioxide; diesel engines; dynamic models; electric generators; electricity; energy use and consumption; greenhouse gas emissions; heat recovery; heat transfer coefficient; prototypes; temperature; thermal energy; transmission electron microscopy; wastes;     Show all 15 Subjects
Abstract:
... Waste heat recovery using a thermoelectric generator (TEG) is a promising approach for vehicle original equipment manufacturers to reduce fuel consumption and lower CO2 emissions. A TEG can convert otherwise wasted thermal energy from engines to electricity directly for use in the vehicle systems. This paper focuses on the development of a dynamic model of TEG system designed for vehicle waste hea ...
DOI:
10.1016/j.apenergy.2017.11.004

59. A dynamic object-oriented model for efficient simulation of microbial reduction in dispersed turbulent flow

Author:
Skoglund, Tomas; Dejmek, Petr
Source:
Journal of food engineering 2008 v.86 no.3 pp. 358-369
ISSN:
0260-8774
Subject:
heat exchangers,   etc   ; turbulent flow; simulation models; chemical reactions; food contamination; microbial contamination; food quality; velocity; food microbiology; liquified foods; computer software;     Show all 11 Subjects
Abstract:
... To account for microbial reduction and food quality changes, first-order chemical reaction was added to a model for axial-dispersed plug flow (ADPF), which was recently developed for efficient (In the terminology of this paper, efficient is related to computation time for a given level of accuracy.) computation of time-dependent, large flow systems. It was shown that the extended ADPF model gives ...
DOI:
10.1016/j.jfoodeng.2007.10.013

60. A 3-field earth-heat-exchange system for a school building in Imola, Italy: Monitoring results

Author:
Chiesa, Giacomo; Simonetti, Marco; Grosso, Mario
Source:
Renewable energy 2014 v.62 pp. 563-570
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; air temperature; climate; energy; heat; monitoring; pipes; relative humidity; renewable energy sources; summer; winter; Italy;     Show all 12 Subjects
Abstract:
... The present study reports the results of a 12-month-long monitoring campaign of an earth-to-air horizontal heat exchanger (EAHX) system in a school complex in Imola, Italy. With more than 2 km of buried pipes, it represents one of the biggest Italian applications of this technology. Considerable differences between inlet and outlet air temperature have been noticed both in winter and in summer. Ai ...
DOI:
10.1016/j.renene.2013.08.020

61. A finite line source model with Cauchy-type top boundary conditions for simulating near surface effects on borehole heat exchangers

Author:
Rivera, Jaime A.; Blum, Philipp; Bayer, Peter
Source:
Energy 2016 v.98 pp. 50-63
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; groundwater flow; heat transfer; models; prediction; temperature;     Show all 6 Subjects
Abstract:
... BHEs (borehole heat exchangers) are the most common shallow geothermal applications. By approximating the BHE as a line source, semi-analytical models can describe the heat exchange within the ground. These models though always assume prescribed temperature at the ground surface. This work presents a formulation which expands existing finite line source models by implementing a more general Cauchy ...
DOI:
10.1016/j.energy.2015.12.129

62. A flexible and multi-functional organic Rankine cycle system: Preliminary experimental study and advanced exergy analysis

Author:
Chen, Jianyong; Zheng, Xiaosheng; Guo, Guiqi; Luo, Xianglong; Chen, Ying; Yang, Zhi
Source:
Energy conversion and management 2019 v.187 pp. 339-355
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; electric energy consumption; exergy; heat transfer; temperature;     Show all 5 Subjects
Abstract:
... In the present study, a novel and flexible experimental facility of an organic Rankine cycle system is constructed. Four extra heat exchangers than traditional test bench are equipped for the system performance testing with different evaporator and condenser or heat transfer examinations of the evaporator and condenser. The combination of an expansion valve and a cooler is designed to simulate the ...
DOI:
10.1016/j.enconman.2019.03.050

63. A framework for assessing the technical and economic potential of shallow geothermal energy in individual and district heating systems: A case study of Slovenia

Author:
Stegnar, Gašper; Staničić, D.; Česen, M.; Čižman, J.; Pestotnik, S.; Prestor, J.; Urbančič, A.; Merše, S.
Source:
Energy 2019 v.180 pp. 405-420
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; carbon; case studies; climate change; cost effectiveness; energy; geothermal energy; heat flow; heat production; models; rural areas; temperature; thermal conductivity; wells; Slovenia;     Show all 15 Subjects
Abstract:
... The deployment of geothermal energy systems can significantly contribute to climate change mitigation and play a part in the transition to a low carbon society. This study proposes a framework for identifying the shallow geothermal energy potential of new individual and district heating (DH) systems. The model accounts for thermal interference between neighbouring wells and borehole heat exchanger ...
DOI:
10.1016/j.energy.2019.05.121

64. A Functional Full-Scale Heat Exchanger Coated with Aluminum Fumarate Metal–Organic Framework for Adsorption Heat Transformation

Author:
Kummer, Harry; Jeremias, Felix; Warlo, Alexander; Füldner, Gerrit; Fröhlich, Dominik; Janiak, Christoph; Gläser, Roger; Henninger, Stefan K.
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.29 pp. 8393-8398
ISSN:
1520-5045
Subject:
heat exchangers,   etc   ; adsorbents; adsorption; aluminum; binding agents; coordination polymers; fumarates; heat; porous media; process design; temperature; working conditions;     Show all 12 Subjects
Abstract:
... Metal–organic frameworks represent a class of microporous adsorbents with high application potential for adsorption heat transformation. Here, we present a functional, full-scale heat exchanger coated with the microporous aluminum fumarate MOF Basolite A520 using a polysiloxane-based binding agent. The function of the heat exchanger was evaluated resulting in a gross cooling power of 2900 W (at th ...
DOI:
10.1021/acs.iecr.7b00106

65. A general distributed parameter model for ground heat exchangers with arbitrary shape and type of heat sources

Author:
You, Tian; Wang, Baolong; Li, Xianting; Shi, Wenxing; Yang, Hongxing
Source:
Energy conversion and management 2018 v.164 pp. 667-679
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; energy; heat pumps; heat transfer; mass transfer; pipes; simulation models; subsoil; temperature;     Show all 9 Subjects
Abstract:
... The heat and mass transfer simulation model of a ground heat exchanger (GHE) directly affects the design and operation performance of a ground-coupled heat pump system. The GHE models based on the response function (like the Green function and g-function) can achieve a fast calculation speed. However, the heat sources in these models are limited to points or whole boreholes, leading to low calcula ...
DOI:
10.1016/j.enconman.2018.03.059

66. A generalized computational model for the simulation of adsorption packed bed reactors – Parametric study of five reactor geometries for cooling applications

Author:
Papakokkinos, Giorgos; Castro, Jesús; López, Joan; Oliva, Assensi
Source:
Applied energy 2019 v.235 pp. 409-427
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; adsorption; aluminum; commercialization; desorption; geometry; global warming; heat; heat transfer coefficient; mathematical models; ozone depletion; porous media; solar energy;     Show all 13 Subjects
Abstract:
... Environmental concerns regarding global warming and ozone depletion urge towards sustainable solutions for satisfying the increasing cooling demand. Adsorption cooling technology could form part of the solution since it can be driven by solar energy and industrial or vehicular waste heat, as well as it employs non ozone-destructive refrigerants. However, its low performance hinders its extensive d ...
DOI:
10.1016/j.apenergy.2018.10.081

67. A genetic optimization of a hybrid organic Rankine plant for solar and low-grade energy sources

Author:
Scardigno, Domenico; Fanelli, Emanuele; Viggiano, Annarita; Braccio, Giacobbe; Magi, Vinicio
Source:
Energy 2015 v.91 pp. 807-815
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; algorithms; energy; energy costs; evaporation; mass flow; temperature profiles;     Show all 7 Subjects
Abstract:
... This paper provides a multi-objective optimization of a hybrid organic Rankine plant for solar and low-grade energy sources. In this plant, water, with a mass flow rate of 1 kg/s at a temperature of 90 °C, preheats the working fluid. The objective of this work is to search for solutions with the highest first and second law efficiencies of the plant and the lowest LEC (levelized energy cost). The ...
DOI:
10.1016/j.energy.2015.08.066

68. A global optimization method for evaporative cooling systems based on the entransy theory

Author:
Yuan, Fang; Chen, Qun
Source:
Energy 2012 v.42 no.1 pp. 181-191
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; air; cooling; cooling systems; energy conservation; energy efficiency; equations; heat transfer; mass transfer; mixing; system optimization; thermal conductivity;     Show all 12 Subjects
Abstract:
... Evaporative cooling technique, one of the most widely used methods, is essential to both energy conservation and environment protection. This contribution introduces a global optimization method for indirect evaporative cooling systems with coupled heat and mass transfer processes based on the entransy theory to improve their energy efficiency. First, we classify the irreversible processes in the ...
DOI:
10.1016/j.energy.2012.03.070

69. A global optimized operation strategy for energy savings in liquid desiccant air conditioning using self-adaptive differential evolutionary algorithm

Author:
Wang, Xinli; Cai, Wenjian; Yin, Xiaohong
Source:
Applied energy 2017 v.187 pp. 410-423
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air conditioning; air quality; algorithms; desiccants; energy; energy conservation; heat transfer; liquids; models; pumps; system optimization;     Show all 12 Subjects
Abstract:
... This study proposes a global optimized operation strategy to reduce energy consumption of a liquid desiccant air conditioning (LDAC) driven by chiller and electric heater. Energy models of chiller, electric heater, pumps and fans are developed to predict their energy consumptions under different operating conditions with different control settings. Heat transfer models of cooling heat exchanger, h ...
DOI:
10.1016/j.apenergy.2016.11.073

70. A heat integration method with multiple heat exchange interfaces

Author:
Bütün, Hür; Kantor, Ivan; Maréchal, François
Source:
Energy 2018 v.152 pp. 476-488
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; case studies; energy efficiency; energy requirements; heat transfer; industrial sites; industry; linear programming; mathematical models; operating costs; process energy; surveys;     Show all 12 Subjects
Abstract:
... In recent decades, energy efficiency has become one of the key issues facing large process industries. Mounting economic, environmental and social pressure motivate energy-intensive industries to improve their efficiency. Identifying retrofit opportunities in large-scale problems is extremely complex due to numerous interconnections and dependencies between process units, sub-units and utilities p ...
DOI:
10.1016/j.energy.2018.03.114

71. A hierarchical approach for the design improvements of an Organocat biorefinery

Author:
Abdelaziz, Omar Y.; Gadalla, Mamdouh A.; El-Halwagi, Mahmoud M.; Ashour, Fatma H.
Source:
Bioresource technology 2015 v.181 pp. 321-329
ISSN:
0960-8524
Subject:
heat exchangers,   etc   ; biomass; biorefining; energy efficiency; energy requirements; freshwater; lignocellulose; renewable energy sources; water utilization;     Show all 9 Subjects
Abstract:
... Lignocellulosic biomass has emerged as a potentially attractive renewable energy source. Processing technologies of such biomass, particularly its primary separation, still lack economic justification due to intense energy requirements. Establishing an economically viable and energy efficient biorefinery scheme is a significant challenge. In this work, a systematic approach is proposed for improvi ...
DOI:
10.1016/j.biortech.2015.01.068

72. A hybrid molten carbonate fuel cell and parabolic trough solar collector, combined heating and power plant with carbon dioxide capturing process

Author:
Marefati, Mohammad; Mehrpooya, Mehdi; Shafii, Mohammad Behshad
Source:
Energy conversion and management 2019 v.183 pp. 193-209
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air; carbon; carbon dioxide; carbonates; computer software; electric power; electrochemistry; exergy; fuel cells; fuels; heat; mathematical models; oxidants; power plants; solar collectors; solar energy; solar farms; thermodynamic models;     Show all 19 Subjects
Abstract:
... In this paper, a combined heating and power plant consisting of molten carbonate fuel cell and parabolic trough solar collector with the carbon dioxide capturing process is investigated. Electrochemical model of the fuel cell and numerical modeling of the solar system is done using MATLAB software and thermodynamic model of the power plant is done by HYSYS software. In this plant, solar system is ...
DOI:
10.1016/j.enconman.2019.01.002

73. A hybrid reduced model for borehole heat exchangers over different time-scales and regions

Author:
Kim, Eui-Jong; Bernier, Michel; Cauret, Odile; Roux, Jean-Jacques
Source:
Energy 2014 v.77 pp. 318-326
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; algorithms; heat pumps; heat transfer; models; temperature; winter;     Show all 7 Subjects
Abstract:
... Accurate modeling of heat transfer in the ground and inside the borehole is crucial to correctly size and assess performance of ground coupled heat pump systems. The model proposed here uses a hybrid approach combining two techniques. First, the rapid transient behavior inside the borehole is handled numerically with a fine grid in combination with a model size reduction technique to reduce comput ...
DOI:
10.1016/j.energy.2014.08.091

74. A hybrid solar chemical looping combustion system with a high solar share

Author:
Jafarian, Mehdi; Arjomandi, Maziar; Nathan, Graham J.
Source:
Applied energy 2014 v.126 pp. 69-77
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; absorption; air; combustion; computer software; exergy; fuels; infrastructure; oxygen; power generation; solar collectors; solar thermal energy; temperature; thermal energy; South Australia;     Show all 15 Subjects
Abstract:
... A novel hybrid solar chemical looping combustion (Hy-Sol-CLC) is presented, in which the oxygen carrier particles in a CLC system are employed to provide thermal energy storage for concentrated solar thermal energy. This hybrid aims to take advantage of key features of a chemical looping combustion (CLC) system that are desirable for solar energy systems, notably their inherent chemical and sensib ...
DOI:
10.1016/j.apenergy.2014.03.071

75. Air-cooled heat exchanger applied to external rotary kiln wall in forced and natural draft

Author:
Huchet, F.; Piton, M.; Del Barrio, A.; Le Corre, O.; Cazacliu, B.
Source:
Energy conversion and management 2017 v.154 pp. 517-525
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air; convection; geometry;     Show all 4 Subjects
Abstract:
... The present paper deals with experimental measurements performed within a heat exchanger devoted to the thermal rotating machineries. The device is based on a rotor-stator system scaled from an industrial rotary kiln. The thermal recovery system is able to capture the heat losses while the kiln wall is cooled. The inner moving wall-to-air heat exchanges measured through the insulated external shel ...
DOI:
10.1016/j.enconman.2017.11.031

76. Air-side thermal hydraulic performance of an integrated fin and micro-channel heat exchanger

Author:
Li, Jiong; Wang, Shuangfeng; Zhang, Weijun
Source:
Energy conversion and management 2011 v.52 no.2 pp. 983-989
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; Reynolds number; friction; heat transfer; heat transfer coefficient;     Show all 5 Subjects
Abstract:
... An integrated fin and micro-channel heat exchanger has been proposed. For 11 heat exchanger samples with different flow depth, fin height, fin pitch and fin thickness, a series of tests were conducted to determine their effect on the air-side thermal hydraulic performance. The heat transfer coefficient and pressure drop for heat exchangers with different geometrical configurations were reported in ...
DOI:
10.1016/j.enconman.2010.08.026

77. Air–soil heat exchangers for heating and cooling of buildings: Design guidelines, potentials and constraints, system integration and global energy balance

Author:
Hollmuller, Pierre; Lachal, Bernard
Source:
Applied energy 2014 v.119 pp. 476-487
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air flow; asymmetry; buildings; climate; energy balance; guidelines; temperature;     Show all 8 Subjects
Abstract:
... Air–soil heat exchangers for heating and cooling of buildings are analyzed under various aspects. Based on the analytically resolved case of a constant airflow subject to sinusoidal temperature input, we start by deriving climate independent design guidelines, for dampening of the daily and/or the yearly temperature oscillation. In a second step, constraints and potential of buried pipe systems ar ...
DOI:
10.1016/j.apenergy.2014.01.042

78. Air source absorption heat pump in district heating: Applicability analysis and improvement options

Author:
Wu, Wei; Shi, Wenxing; Li, Xianting; Wang, Baolong
Source:
Energy conversion and management 2015 v.96 pp. 197-207
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; absorption; air; energy conservation; heat; heat pumps; water temperature;     Show all 7 Subjects
Abstract:
... The low-temperature district heating system based on the air source absorption heat pump (ASAHP) was assessed to have great energy saving potential. However, this system may require smaller temperature drop leading to higher pump consumption for long-distance distribution. Therefore, the applicability of ASAHP-based district heating system is analyzed for different primary return temperatures, pip ...
DOI:
10.1016/j.enconman.2015.02.068

79. Air source heat pump water heater: Dynamic modeling, optimal energy management and mini-tubes condensers

Author:
Ibrahim, Oussama; Fardoun, Farouk; Younes, Rafic; Louahlia-Gualous, Hasna
Source:
Energy 2014 v.64 pp. 1102-1116
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; air; ambient temperature; climatic zones; condensers; dynamic models; electricity; energy; energy conservation; greenhouse gas emissions; greenhouse gases; heat pumps; heaters; simulation models; tariffs; winter; Lebanon;     Show all 17 Subjects
Abstract:
... This paper presents a dynamic simulation model to predict the performance of an ASHPWH (air source heat pump water heater). The developed model is used to assess its performance in the Lebanese context. It is shown that for the four Lebanese climatic zones, the expected monthly values of the average COP (coefficient of performance) varies from 2.9 to 5, leading to high efficiencies compared with c ...
DOI:
10.1016/j.energy.2013.11.017

80. Air source thermoelectric heat pump for simultaneous cold air delivery and hot water supply: Full modeling and performance evaluation

Author:
Cai, Yang; Zhang, Dong-Dong; Liu, Di; Zhao, Fu-Yun; Wang, Han-Qing
Source:
Renewable energy 2019 v.130 pp. 968-981
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; air; air temperature; cold; coolers; energy; heat pumps; mass flow; mathematical models; renewable energy sources; specific heat; thermal conductivity; water supply; water temperature;     Show all 14 Subjects
Abstract:
... An air-source thermoelectric heat pump (AS-THP) system is proposed in the present work, and it actively exploits ambient air source energy serving for cold air delivery and hot water supply simultaneously. A mathematical model, combining thermoelectric theory and the effectiveness-number of transfer units (ε-NTU), is firstly conducted to predict the performance of AS-THP system. Subsequently, the ...
DOI:
10.1016/j.renene.2018.07.007

81. A 1kWₑ thermoelectric stack for geothermal power generation – Modeling and geometrical optimization

Author:
Suter, C.; Jovanovic, Z.R.; Steinfeld, A.
Source:
Applied energy 2012 v.99 pp. 379-385
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; aluminum oxide; cold; copper; electric power; geothermal energy; heat transfer; models; power generation; temperature;     Show all 10 Subjects
Abstract:
... A thermoelectric stack comprising an array of Bi–Te based thermoelectric converter (TEC) modules is considered for geothermal heat conversion. Each TEC module consists of 127 (Bi₀.₂Sb₀.₈)₂Te₃/Bi₂(Te₀.₉₆Se₀.₀₄)₃p/n-type thermoelement pairs, fastened by 30×30mm² Al₂O₃ plates. The thermoelement pairs have leg cross-section of 1.05×1.05mm², a figure-of-merit equal to 1, and a theoretical heat-to-elect ...
DOI:
10.1016/j.apenergy.2012.05.033

82. Alkanes as fluids in Rankine cycles in comparison to water, benzene and toluene

Author:
Siddiqi, M. Aslam; Atakan, Burak
Source:
Energy 2012 v.45 no.1 pp. 256-263
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; benzene; case studies; cogeneration systems; energy; gases; heat; hexane; octane; surface area; temperature; toluene; turbines;     Show all 13 Subjects
Abstract:
... Waste heat recovery from the exhaust gases of gas turbines, geothermal resources, and from industrial plants offers a great opportunity for rational energy usage by productively converting the waste energy. In the present communication we report a systematic study starting with the hydrocarbons for the different temperature ranges at which the waste heat is available from high, medium, or low temp ...
DOI:
10.1016/j.energy.2012.06.005

83. Alkanes based two-stage expansion with interheating Organic Rankine cycle for multi-waste heat recovery of truck diesel engine

Author:
Liu, Peng; Shu, Gequn; Tian, Hua; Wang, Xuan; Yu, Zhigang
Source:
Energy 2018 v.147 pp. 337-350
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; alkanes; diesel engines; heat recovery; models; petroleum; prices; wastes;     Show all 8 Subjects
Abstract:
... The environment issue combined with the rising of crude oil price has attracted more attention in waste heat recovery of diesel engine. The Organic Rankine cycle (ORC) offers a good solution to utilize multi-grade waste heats of diesel engine. Conventional multi-source ORC systems are too complex for vehicle application. This paper proposed a two-stage expansion with interheating organic Rankine c ...
DOI:
10.1016/j.energy.2017.12.109

84. Alternative and sustainable heat production for drinking water needs in a subarctic climate (Nunavik, Canada): Borehole thermal energy storage to reduce fossil fuel dependency in off-grid communities

Author:
Giordano, Nicolò; Raymond, Jasmin
Source:
Applied energy 2019 v.252 pp. 113463
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; advection; cold; cold zones; drinking water; electricity; energy costs; energy use and consumption; fossil fuels; groundwater; groundwater flow; heat production; heat recovery; heat sums; lakes; life cycle costing; permafrost; renewable energy sources; solar radiation; supply balance; temperate zones; temperature; thermal energy; Arctic region; Quebec;     Show all 25 Subjects
Abstract:
... The development of renewable energy technologies in the Arctic faces technical barriers mainly related to extremely cold temperature. Moreover, storage issues to bridge the gap between supply and demand are more compelling than in temperate climates. Can underground thermal energy storage be efficiently used in such a cold environment to offer a viable seasonal storage alternative? This working hy ...
DOI:
10.1016/j.apenergy.2019.113463

85. Alternative Mixed-Integer Linear Programming Formulations for Shell and Tube Heat Exchanger Optimal Design

Author:
Gonçalves, Caroline de O.; Costa, André L. H.; Bagajewicz, Miguel J.
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.20 pp. 5970-5979
ISSN:
1520-5045
Subject:
heat exchangers,   etc   ; heat transfer; linear programming; models; process design;     Show all 5 Subjects
Abstract:
... In a recent article (Gonçalves et al., AIChE J. 2017. DOI: 10.1002/aic.15556), we presented a mixed-integer linear programming formulation for the detailed design of shell and tube heat exchangers based on the Kern approach (Kern, D. Q. Process Heat Transfer; McGraw Hill, 1950). The formulation relies on the use of standardized values for several mechanical parts, which we express in terms of dis ...
DOI:
10.1021/acs.iecr.6b04950

86. A lumped-parameter dynamical model of a nuclear heating reactor cogeneration plant

Author:
Dong, Zhe; Pan, Yifei
Source:
Energy 2018 v.145 pp. 638-656
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; computer software; dynamic models; electricity generation; generators (equipment); heat; heat tolerance; mathematical models; momentum; steam; systems engineering;     Show all 11 Subjects
Abstract:
... Based on the conservation laws of mass, energy and momentum, a lumped-parameter dynamical model is proposed for the nuclear heating reactor cogeneration plant NHR200-II that can be served for electricity production and district heating. This model is mainly composed of the dynamics of the reactor, steam generator, turbine, deaerator, heat exchangers and secondary steam flow network. Then, the stea ...
DOI:
10.1016/j.energy.2017.12.153

87. A mathematical model for the prediction of the whey protein fouling mass in a pilot scale plate heat exchanger

Author:
Gu, Yingying; Bouvier, Laurent; Tonda, Alberto; Delaplace, Guillaume
Source:
Food control 2019 v.106 pp. 106729
ISSN:
0956-7135
Subject:
heat exchangers,   etc   ; Reynolds number; beta-lactoglobulin; calcium; casein; fouling; guidelines; heat treatment; mathematical models; powders; prediction; surface area; temperature; whey protein concentrate;     Show all 14 Subjects
Abstract:
... A better understanding of protein fouling during the thermal treatment of whey protein concentrate (WPC) solutions is critical for better fouling control. In order to understand the impact of various parameters on the total whey protein fouling mass, a dimensional analysis was applied to the experimental data obtained from a pilot scale plate heat exchanger, setting total fouling mass as the targe ...
DOI:
10.1016/j.foodcont.2019.106729

88. A mathematical model to predict the effect of heat recovery on the wastewater temperature in sewers

Author:
Dürrenmatt, David J.; Wanner, Oskar
Source:
Water research 2014 v.48 pp. 548-558
ISSN:
0043-1354
Subject:
heat exchangers,   etc   ; energy; headspace analysis; heat pumps; heat transfer; mathematical models; planning; prediction; soil; temperature; thermal conductivity; time series analysis; wastewater; wastewater treatment; Switzerland;     Show all 15 Subjects
Abstract:
... Raw wastewater contains considerable amounts of energy that can be recovered by means of a heat pump and a heat exchanger installed in the sewer. The technique is well established, and there are approximately 50 facilities in Switzerland, many of which have been successfully using this technique for years. The planning of new facilities requires predictions of the effect of heat recovery on the wa ...
DOI:
10.1016/j.watres.2013.10.017

89. A method for measuring thermal time distributions in continuous flow heat exchangers

Author:
Ellborg, A.; Tragardh, C.
Source:
Journal of food process engineering 1994 v.17 no.3 pp. 279-298
ISSN:
0145-8876
Subject:
heat exchangers,   etc   ; food processing; food processing equipment; heat treatment; liquids; mathematical models;     Show all 6 Subjects
DOI:
10.1111/j.1745-4530.1994.tb00340.x

90. A methodology for designing thermodynamic energy conversion systems in industrial mass/heat integration problems based on MILP models

Author:
Wissocq, Thibaut; Ghazouani, Sami; Le Bourdiec, Solène
Source:
Energy 2019 v.185 pp. 121-135
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; ammonia; capital; case studies; energy conversion; energy recovery; heat transfer; models;     Show all 8 Subjects
Abstract:
... The integration of thermodynamic systems in industrial processes can help increasing the energy recovery and provide more integration opportunities. However, designing such technologies in a simultaneous mass and heat integration is a large-scale and complex problem. Indeed, the heat requirements created by the mass allocation network are unknown prior to the whole design. Besides, designing seque ...
DOI:
10.1016/j.energy.2019.06.124

91. A methodology for the synthesis of heat exchanger networks having large numbers of uncertain parameters

Author:
Novak Pintarič, Zorka; Kravanja, Zdravko
Source:
Energy 2015 v.92 pp. 373-382
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; case studies; computational methodology; industry; models; topology;     Show all 6 Subjects
Abstract:
... This paper presents a robust computational methodology for the synthesis and design of flexible HEN (Heat Exchanger Networks) having large numbers of uncertain parameters. This methodology combines several heuristic methods which progressively lead to a flexible HEN design at a specific level of confidence. During the first step, a HEN topology is generated under nominal conditions followed by det ...
DOI:
10.1016/j.energy.2015.02.106

92. A Method to Estimate the Hydraulic Conductivity of the Ground by TRT Analysis

Author:
Liuzzo Scorpo, Alberto; Nordell, Bo; Gehlin, Signhild
Source:
Ground water 2017 v.55 no.1 pp. 110-118
ISSN:
0017-467X
Subject:
heat exchangers,   etc   ; aquifers; engineering; groundwater flow; heat; hydraulic conductivity; thermal conductivity; tracer techniques;     Show all 8 Subjects
Abstract:
... The knowledge of hydraulic properties of aquifers is important in many engineering applications. Careful design of ground‐coupled heat exchangers requires that the hydraulic characteristics and thermal properties of the aquifer must be well understood. Knowledge of groundwater flow rate and aquifer thermal properties is the basis for proper design of such plants. Different methods have been develo ...
DOI:
10.1111/gwat.12443

93. A MINLP optimization of the configuration and the design of a district heating network: Academic study cases

Author:
Mertz, Théophile; Serra, Sylvain; Henon, Aurélien; Reneaume, Jean-Michel
Source:
Energy 2016 v.117 pp. 450-464
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; cost effectiveness; heat production; models; operating costs; temperature;     Show all 6 Subjects
Abstract:
... The aim of this work is to propose a tool for the design assistance of District Heating Network (DHN). Two goals of DHN optimization are handled simultaneously: the optimization of the configuration and its design. The optimization objective is to minimize the global cost of the DHN over 30 years. It includes both operating costs (heating and pumping cost, including thermal losses and pressure dro ...
DOI:
10.1016/j.energy.2016.07.106

94. A MINLP Study on Shell and Tube Heat Exchanger: Hybrid Branch and Bound/Meta-heuristics Approaches

Author:
Aras, Ö.; Bayramoğlu, M.
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.43 pp. 14158-14170
ISSN:
1520-5045
Subject:
heat exchangers,   etc   ; algorithms; case studies; chemistry; energy efficiency; engineering; models;     Show all 7 Subjects
Abstract:
... Optimal design of shell and tube heat exchangers (STHE) has a crucial role in terms of the energy efficiency of plants. Therefore, it is currently one of the research topics of interest. In this study, a rigorous STHE design model strictly following TEMA standards and including various crucial constraints was established. Ten design variables of various kinds (continuous, integer, discrete, binary ...
DOI:
10.1021/ie3011462

95. A mixed-integer nonlinear programming approach to the optimal design of heat network in a polygeneration energy system

Author:
Zhang, Jianyun; Liu, Pei; Zhou, Zhe; Ma, Linwei; Li, Zheng; Ni, Weidou
Source:
Applied energy 2014 v.114 pp. 146-154
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; electricity; energy efficiency; generators (equipment); heat flow; heat recovery; models; temperature;     Show all 8 Subjects
Abstract:
... A large number of heat flows at various temperature and pressure levels exist in a polygeneration plant which co-produces electricity and chemical products. Integration of these external heat flows in a heat recovery steam generator (HRSG) has great potential to further enhance energy efficiency of such a plant; however, it is a challenging problem arising from the large design space of heat excha ...
DOI:
10.1016/j.apenergy.2013.09.057

96. A model-based diagnostic technique to enhance faults isolability in Solid Oxide Fuel Cell systems

Author:
Polverino, Pierpaolo; Sorrentino, Marco; Pianese, Cesare
Source:
Applied energy 2017 v.204 pp. 1198-1214
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air; algorithms; anodes; diagnostic techniques; energy conversion; fuel cells; fuels; hydrogen; models; recycling;     Show all 11 Subjects
Abstract:
... This work illustrates an innovative diagnostic technique able to improve fault isolability in Solid Oxide Fuel Cell (SOFC) energy conversion systems. On-board sensor reduction may induce fault clustering and, thus, hinder univocal fault isolation. According to the proposed technique, isolated system component sub-models, fed with faulty inputs, can be used to solve this issue. These models provide ...
DOI:
10.1016/j.apenergy.2017.05.069

97. A modeling study on the heat storage and release characteristics of a phase change material based double-spiral coiled heat exchanger in an air source heat pump for defrosting

Author:
Hu, Wenju; Song, Mengjie; Jiang, Yiqiang; Yao, Yang; Gao, Yan
Source:
Applied energy 2019 v.236 pp. 877-892
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air; heat pumps; heat transfer; mathematical models; space and time; temperature; thawing;     Show all 8 Subjects
Abstract:
... There were very limited modeling studies are around a phase change material based double-spiral coiled heat exchanger, due to the difficulties of model development and the lack of mature simulation tools. When a phase change material based double-spiral coiled heat exchanger applied in an air source heat pump for defrosting, its model development becomes more complicated. To solve this fundamental ...
DOI:
10.1016/j.apenergy.2018.12.057

98. A modified Allam cycle without compressors realizing efficient power generation with peak load shifting and CO2 capture

Author:
Zhu, Zilong; Chen, Yaping; Wu, Jiafeng; Zhang, Shaobo; Zheng, Shuxing
Source:
Energy 2019 v.174 pp. 478-487
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; carbon dioxide; cold; combustion; compressors; condensation (phase transition); energy; greenhouse gas emissions; heat recovery; liquefaction; liquids; mixing; natural gas; oxygen; power generation; pumps; temperature;     Show all 17 Subjects
Abstract:
... A modified Allam cycle (Allam-Z cycle) with a simpler system was proposed and investigated using NG (natural gas)/O2 combustion products mixing with the circulation CO2 as the working medium for power generation with high efficiency, zero CO2 emission and peak load shifting. The modifications are that all the working media are pumped to high pressure by pumps instead of compressors, the cold energ ...
DOI:
10.1016/j.energy.2019.01.165

99. A modified ammonia-water power cycle using a distillation stage for more efficient power generation

Author:
Chen, X.; Wang, R.Z.; Wang, L.W.; Du, S.
Source:
Energy 2017 v.138 pp. 1-11
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; distillation; exergy; heat transfer; power generation; temperature;     Show all 6 Subjects
Abstract:
... An ammonia-water power cycle with a distillation stage is proposed, two Kalina cycles and one Organic Rankine Cycle (ORC) are selected for comparisons under two scenarios: medium (346 °C) and low (146 °C) heat source temperatures. The optimization efforts are aimed at maximizing net power production for all concerning cycles, the results show that the proposed cycle can produce 9% and 8% more powe ...
DOI:
10.1016/j.energy.2017.07.023

100. A modified mathematical model for spiral coil-type horizontal ground heat exchangers

Author:
Jeon, Jun-Seo; Lee, Seung-Rae; Kim, Min-Jun
Source:
Energy 2018 v.152 pp. 732-743
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; energy; mathematical models; prediction; temperature; thermodynamics;     Show all 6 Subjects
Abstract:
... Although many studies have investigated spiral coil-type horizontal ground heat exchangers (HGHEs), a reliable mathematical model of them has not yet been developed. Accordingly, this study proposes a modification of existing mathematical model, which was originally developed for energy piles and vertical ground heat exchangers, for HGHEs. Based on the solution of the heat equation using Green's f ...
DOI:
10.1016/j.energy.2018.04.007