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1. Performance assessment of the automotive heat exchanger with twisted tape for thermoelectric based waste heat recovery

Author:
Karana, Dhruv Raj; Sahoo, Rashmi Rekha
Source:
Journal of cleaner production 2021 v.283 pp. 124631
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; automobiles; diesel engines; emissions; energy use and consumption; geometry; waste heat recovery;     Show all 7 Subjects
Abstract:
... Waste heat recovery in automobiles is a practical technique to reduce emissions and fuel consumption. The extent of waste heat recovery is directly proportional to the efficiency of the heat exchanger. However, the change in internal geometry has become a convenient method to extract the maximum heat from the exhaust heat exchanger while producing a minimum pressure drop. In the current study, the ...
DOI:
10.1016/j.jclepro.2020.124631

2. A novel integrated structure for hydrogen purification using the cryogenic method

Author:
Aasadnia, Majid; Mehrpooya, Mehdi; Ghorbani, Bahram
Source:
Journal of cleaner production 2021 v.278 pp. 123872
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; exergy; fuels; heat; hydrogen; nitrogen; propane; refrigeration; separators; specific energy;     Show all 10 Subjects
Abstract:
... A cryogenic-based module is developed for the separation of the hydrogen from a feed gas mixture including nitrogen and linear branched or cyclic C1−C6 hydrocarbons. The feed gas mixture is initially separated in a network of heat exchangers and phase separators to produce hydrogen-rich and hydrogen-lean streams. The hydrogen-enrich stream is extracted from the cryogenic separation heat exchangers ...
DOI:
10.1016/j.jclepro.2020.123872

3. Effect of casein/whey ratio on the thermal denaturation of whey proteins and subsequent fouling in a plate heat exchanger

Author:
Liu, Weiji; Chen, Xiao Dong; Jeantet, Romain; André, Christophe; Bellayer, Severine; Delaplace, Guillaume
Source:
Journal of food engineering 2021 v.289 pp. 110175
ISSN:
0260-8774
Subject:
heat exchangers,   etc   ; beta-lactoglobulin; calcium; casein; denaturation; food processing; fouling; models; pasteurization; whey; whey protein isolate;     Show all 11 Subjects
Abstract:
... Dairy fouling is a ubiquitous problem in food processing, however, the fouling mechanism is not fully understood and investigations arose mainly from experiments with model systems that contained only whey proteins, typically reconstituted from whey protein isolate powder (WPI). The effect of casein on fouling has been rarely considered despite it is the major component of milk proteins. To fill t ...
DOI:
10.1016/j.jfoodeng.2020.110175

4. Heat and mass transfer of scraped surface heat exchanger used for suspension freeze concentration

Author:
Ding, Zhongxiang; Qin, Frank G.F.; Peng, Kewen; Yuan, Jiaojiao; Huang, Simin; Jiang, Runhua; Shao, Youyuan
Source:
Journal of food engineering 2021 v.288 pp. 110141
ISSN:
0260-8774
Subject:
heat exchangers,   etc   ; crystallization; energy efficiency; heat; heat transfer coefficient; ice; mass transfer; models;     Show all 8 Subjects
Abstract:
... Freeze concentration (FC) by suspension crystallization is a complex process due to the combination of a scraped-surface heat exchanger, crystallizer, and wash column. Following the study of a three-in-one structure of a multi-pass FC published earlier this year, modeling and experiments of the heat and mass transfer of this freeze concentrator are presented in this paper. The experimental assessm ...
DOI:
10.1016/j.jfoodeng.2020.110141

5. Effect of geo-climatic conditions and pipe material on heating performance of earth-air heat exchangers

Author:
Lekhal, Mohammed Cherif; Benzaama, Mohammed-Hichem; Kindinis, Andrea; Mokhtari, Abderahmane-Mejedoub; Belarbi, Rafik
Source:
Renewable energy 2021 v.163 pp. 22-40
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; arid zones; cities; heat; poly(vinyl chloride); renewable energy sources; semiarid zones; temperate zones; zinc; Algeria;     Show all 10 Subjects
Abstract:
... Climatological and geological site classification intended for Earth-Air Heat Exchanger Technology (EAHE) is an important factor in the design, implementation and optimal operation of such system. In this context, this paper presents an investigation on the heating performance and operating feasibility of two EAHEs in three different geo-climatic regions in Algeria. First, the performances of the ...
DOI:
10.1016/j.renene.2020.08.044

6. Energy assessment based on semi-dynamic modelling of a photovoltaic driven vapour compression chiller using phase change materials for cold energy storage

Author:
Varvagiannis, Efstratios; Charalampidis, Antonios; Zsembinszki, Gabriel; Karellas, Sotirios; Cabeza, Luisa F.
Source:
Renewable energy 2021 v.163 pp. 198-212
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; batteries; cold; cooling; cooling systems; economic feasibility; models; phase transition; renewable energy sources; thermal energy; vapors;     Show all 11 Subjects
Abstract:
... Solar cooling systems are a promising solution for reducing the electrical consumption of conventional building cooling systems. Among various alternatives, photovoltaic driven vapour compression chillers are currently the most mature and economically feasible solar cooling technology. This study focuses on the semi-dynamic modelling of a vapour compression chiller coupled with a novel refrigerant ...
DOI:
10.1016/j.renene.2020.08.034

7. Proposal and techno-economic analysis of a novel system for waste heat recovery and water saving in coal-fired power plants: A case study

Author:
Tan, Houzhang; Cao, Ruijie; Wang, Shunsen; Wang, Yibin; Deng, Shuanghui; Duić, Neven
Source:
Journal of cleaner production 2021 v.281 pp. 124372
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; case studies; coal; condensates; economic analysis; flue gas; fluorine; heat pumps; hydrologic cycle; power generation; power plants; steam; temperature; thermodynamic models; waste heat recovery; water conservation;     Show all 16 Subjects
Abstract:
... A novel system, which systematically recover waste heat and reduce water consumption in coal-fired power plants, is proposed in this paper. Critical components of the system are two fluorine plastic heat exchangers (FHEs) located downstream and upstream of WFGD scrubber, and condensate and feed water extracted from the regenerative heater (RH) act as coolants, respectively. All recovered heat is u ...
DOI:
10.1016/j.jclepro.2020.124372

8. Numerical investigation and experimental validation of the thermal performance enhancement of a compact finned-tube heat exchanger for efficient latent heat thermal energy storage

Author:
Amagour, Mohamed El Habib; Bennajah, Mounir; Rachek, Adil
Source:
Journal of cleaner production 2021 v.280 pp. 124238
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; aluminum; copper; equations; heat transfer; latent heat; mathematical models; melting; solar thermal energy; solidification; storage time; temperature; thermal energy;     Show all 13 Subjects
Abstract:
... This paper presents a numerical study of heat transfer performance inside a compact finned-tube heat exchanger employed in latent heat storage (LHS). A three-dimensional mathematical model of the storage system was developed and validated based on experimental results of charging and discharging. The heat transfer problem during phase change was addressed by solving Navier–Stokes equations combine ...
DOI:
10.1016/j.jclepro.2020.124238

9. Long-term thermal performance analysis of deep coaxial borehole heat exchanger based on field test

Author:
Huang, Yibin; Zhang, Yanjun; Xie, Yangyang; Zhang, Yu; Gao, Xuefeng; Ma, Jingchen
Source:
Journal of cleaner production 2021 v.278 pp. 123396
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; clean energy; energy use and consumption; engineering; geothermal energy; heat transfer; mathematical models; model validation; optical fibers; soil; temperature; thermal conductivity;     Show all 12 Subjects
Abstract:
... Geothermal energy is an abundant and clean energy source that is abundant and widely and naturally distributed in the earth. Deep coaxial borehole heat exchanger (DCBHE) can efficiently extract heat from rock-soil for building heating. And DCBHE systems have superior application performance to that of the traditional BHEs. However, the existing related researches are primarily focused on theory an ...
DOI:
10.1016/j.jclepro.2020.123396

10. A dynamic model for once-through direct steam generation in linear focus solar collectors

Author:
Soares, João; Oliveira, Armando C.; Valenzuela, Loreto
Source:
Renewable energy 2021 v.163 pp. 246-261
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; computer software; dynamic models; generators (equipment); heat transfer; model validation; oils; power plants; solar collectors; solar energy; solar radiation; steam; temperature; time series analysis;     Show all 14 Subjects
Abstract:
... Direct Steam Generation in parabolic trough solar collectors is one of the most promising alternatives for replacing the use of thermal oil in solar power plants and process heat. The main advantages are: elimination of steam generator heat exchangers; use of a non-toxic fluid; operation with power cycle higher temperatures, therefore with higher efficiency. Nevertheless, modelling the two-phase f ...
DOI:
10.1016/j.renene.2020.08.127

11. A novel two-step synthesis method with weakening strategy for solving large-scale heat exchanger networks

Author:
Zhang, Hongliang; Huang, Xiaohuang; Peng, Fuyu; Cui, Guomin; Huang, Tengchao
Source:
Journal of cleaner production 2020 v.275 pp. 123103
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; algorithms; engineering; pollution;     Show all 4 Subjects
Abstract:
... Efficiently solving large-scale heat exchanger network (HEN) synthesis problems remains a challenging task mainly due to the presence of discontinuity caused by integer variables as well as nonlinearity of the objective cost function. This paper focuses on efficiently solving large-scale HEN synthesis problems based on a chessboard presentation with no splits, and aims to achieve globally near-opt ...
DOI:
10.1016/j.jclepro.2020.123103

12. Interplant Heat Integration Method Involving Multiple Intermediate Fluid Circles and Agents: Single-Period and Multiperiod Designs

Author:
Liu, Linlin; Wu, Changhao; Zhuang, Yu; Zhang, Lei; Du, Jian
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.10 pp. 4698-4711
ISSN:
1520-5045
Subject:
heat exchangers,   etc   ; heat recovery; models;     Show all 3 Subjects
Abstract:
... Intermedium agents play an important role in indirect interplant heat integration. Each of them has a unique performance in heat recovery, however seldom conjunctively employed, which simplifies the problem but limits the extent of heat recovery. Thus, in order to fully exploit the potential of cascade heat recovery across plants, this work presents an optimization-based method to perform the auto ...
DOI:
10.1021/acs.iecr.9b06561

13. Energy and environmental investigation of R744 all-in-one configurations for refrigeration and heating/air conditioning needs of a supermarket

Author:
Tsimpoukis, Dimitrios; Syngounas, Evangelos; Petsanas, Dimitrios; Mitsopoulos, Georgios; Anagnostatos, Stavros; Bellos, Evangelos; Tzivanidis, Christos; Vrachopoulos, Michail Gr.
Source:
Journal of cleaner production 2021 v.279 pp. 123234
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; air conditioning; carbon dioxide; climate; cooling; developed countries; electric energy consumption; emissions; energy efficiency; engineering; environmental impact; equations; global warming potential; heat; heat pumps; refrigeration; supermarkets; topology;     Show all 18 Subjects
Abstract:
... Refrigeration systems and heating/air conditioning units used in supermarkets are responsible for a great part of the annual electricity consumption of industrialized countries. Taking also into consideration the direct emissions of carbon dioxide to the environment due to leakage of refrigerants with high Global Warming Potential that are employed today for such applications, a step towards more ...
DOI:
10.1016/j.jclepro.2020.123234

14. Energy and life cycle impact assessment for xylitol production from corncob

Author:
Dasgupta, Diptarka; Sidana, Arushdeep; Ghosh, Prasenjit; Sharma, Tripti; Singh, Jasvinder; Prabhune, Asmita; More, Snehal; Bhaskar, Thallada; Ghosh, Debashish
Source:
Journal of cleaner production 2021 v.278 pp. 123217
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; agricultural wastes; biomass; biorefining; carbon dioxide; corn cobs; crystals; ecotoxicology; energy; energy requirements; environmental impact; evaporators; feedstocks; fermentation; freshwater; heat; hemicellulose; life cycle impact assessment; simulation models; value added; xylitol; xylose; India;     Show all 23 Subjects
Abstract:
... The conversion of biobased feedstocks into energy and value-added chemicals is one main approach to address the current global challenge for waste mitigation through the biorefinery mode. Corncob biomass which is one of the most abundant agricultural residue in India with a high hemicellulose content, can serve as a potential low-cost raw material for food-grade xylitol production. The present stu ...
DOI:
10.1016/j.jclepro.2020.123217

15. Improvement of energy efficiency in ethanol production supported with solar thermal energy – A case study

Author:
Anastasovski, Aleksandar
Source:
Journal of cleaner production 2021 v.278 pp. 123476
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; algorithms; batch systems; case studies; energy costs; energy efficiency; equipment; ethanol production; fossil fuels; fuel oils; heat recovery; manufacturing; nonrenewable resources; solar radiation; solar thermal energy; summer; thermal energy; thermal radiation; winter;     Show all 19 Subjects
Abstract:
... The decrease of natural reserves of non-renewable energy sources increases the energy prices. That initiates the fossil fuel replacement with renewable energy sources. The sun is an unlimited source of heat, but that is not enough used for industrial processes. The main reason is the complexity of heat integration between solar heating systems, process streams, and heat storage. Streams in batch p ...
DOI:
10.1016/j.jclepro.2020.123476

16. Life cycle assessment of cleaning-in-place operations in egg yolk powder production

Author:
Tsai, Jheng-Han; Huang, Jen-Yi; Wilson, D. Ian
Source:
Journal of cleaner production 2021 v.278 pp. 123936
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; cleaning in place; coal; cold storage; ecotoxicology; egg yolk; eggs; electric energy consumption; electricity; emissions; environmental impact; equipment; fouling; heat; life cycle assessment; manufacturing; pasteurization; sodium hydroxide; spray drying; temperature; thermal energy; wastewater; wastewater treatment;     Show all 23 Subjects
Abstract:
... The manufacture of egg yolk powder by spray drying requires regular cleaning in order to remove fouling deposits and prevent microbiological growth on the pasteurisation heat exchanger and the spray dryer. A life cycle assessment (LCA) study on a typical powder manufacturing plant, using literature data, indicated that the egg breaking, storage and pasteurisation steps were the major contributors ...
DOI:
10.1016/j.jclepro.2020.123936

17. A review on application and heat transfer enhancement of supercritical CO2 in low-grade heat conversion

Author:
Zhang, Shijie; Xu, Xiaoxiao; Liu, Chao; Dang, Chaobin
Source:
Applied energy 2020 v.269 pp. 114962
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; carbon dioxide; convection; energy conversion;     Show all 4 Subjects
Abstract:
... Trans-critical CO₂ Rankine system is a new technology for low-grade heat utilization which has high energy conversion efficiency and exergo-economic efficiency. The gas heater is one of the most important components in trans-critical CO₂ Rankine system, which is a crucial challenge for its practical application because of high pressure and abrupt change in thermo-physical properties of supercritic ...
DOI:
10.1016/j.apenergy.2020.114962

18. An in-house built code incorporated into CFD model for the simulation of boiler's convection section

Author:
Drosatos, Panagiotis; Nikolopoulos, Nikolaos; Kakaras, Emmanouil
Source:
Fuel processing technology 2020 v.202 pp. 106333
ISSN:
0378-3820
Subject:
heat exchangers,   etc   ; convection; fouling; mass flow; temperature;     Show all 5 Subjects
Abstract:
... This work presents an in-house built code and its incorporation into an ANSYS Fluent® Computational Fluid Dynamics (CFD) model for the simulation of the convection section of a boiler without needing numerous thermodynamic or experimental data, sophisticated numerical grids or assumptions that decrease the validity of the model. This model has been applied in a recently retrofitted lignite-fired b ...
DOI:
10.1016/j.fuproc.2019.106333

19. Heat Transfer and Fluid Flow Characteristics for Newtonian and Non-Newtonian Fluids in a Tube-in-Tube Helical Coil Heat Exchanger

Author:
Kushwaha, Naveen; Kumawat, Tara Chand; Nigam, Krishna Deo Prasad; Kumar, Vimal
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.9 pp. 3972-3984
ISSN:
1520-5045
Subject:
heat exchangers,   etc   ; friction; heat transfer; models;     Show all 4 Subjects
Abstract:
... In the present work, heat transfer and fluid flow characteristics for both Newtonian and non-Newtonian fluids in tube-in-tube helical coil (TTHC) heat exchangers have been investigated numerically. The various TTHC heat exchanger configurations studied are (1) parallel and (2) counter flow, with and without baffles. The power law index (n) and Dean number (NDₑ) are varied from 0.5 to 1.25 and 50 t ...
DOI:
10.1021/acs.iecr.9b07044

20. Part-load performance analysis of a combined cycle with intermediate recuperated gas turbine

Author:
Li, Yongyi; Zhang, Guoqiang; Wang, Ligang; Yang, Yongping
Source:
Energy conversion and management 2020 v.205 pp. 112346
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air; heat; mass flow; temperature;     Show all 5 Subjects
Abstract:
... In order to improve the performance of the combined cycle gas turbine (CCGT) under off-design conditions, an intermediate recuperated combined cycle gas turbine (IRCCGT) system was proposed, which was designed to suppress turbine inlet temperature (TIT) from decreasing as the load drops. In this system, a heat exchanger is installed between the third and fourth turbine stages, wherein a portion of ...
DOI:
10.1016/j.enconman.2019.112346