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You searched for: Journal Energy conversion and management Remove constraint Journal: Energy conversion and management Publication Year 2016 Remove constraint Publication Year: 2016 Source 2016 v.110 Remove constraint Source: 2016 v.110
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1. Air–steam biomass gasification: Experiments, modeling and simulation

Author:
Sharma, Shweta; Sheth, Pratik N.
Source:
Energy conversion and management 2016 v.110 pp. 307-318
ISSN:
0196-8904
Subject:
air; biomass; energy balance; gasification; hydrogen; models; oxidation; steam; temperature; water content
Abstract:
... Biomass is one of the most widely available energy sources and gasification is as an efficient process of converting biomass into combustible gases by partial oxidation at high temperature. In order to increase the hydrogen content of the producer gas, steam is used along with air in a gasifier. In the present study, extensive experimental work is carried out in a downdraft gasifier using air and ...
DOI:
10.1016/j.enconman.2015.12.030

2. An investigation on unsteadiness of a mixed-flow turbine under pulsating conditions

Author:
Yang, Mingyang; Deng, Kangyao; Martines-Botas, Ricardo; Zhuge, Weilin
Source:
Energy conversion and management 2016 v.110 pp. 51-58
ISSN:
0196-8904
Subject:
compressors; energy conservation; mass flow; models; spark ignition engines
Abstract:
... The turbocharger is the key enabler for energy conservation in Internal Combustion Engine (ICE). A turbine of a turbocharger is fed by highly pulsating flow due to the reciprocating engine, resulting in different behavior from that at steady conditions. This paper investigates the behavior of a mix-flow turbine under pulsating conditions via an analytical model and an in-house developed 1-D unstea ...
DOI:
10.1016/j.enconman.2015.12.007

3. A novel louvered fin design to enhance thermal and drainage performances during periodic frosting/defrosting conditions

Author:
Kim, Min-Hwan; Kim, Hisuk; Kim, Dong Rip; Lee, Kwan-Soo
Source:
Energy conversion and management 2016 v.110 pp. 494-500
ISSN:
0196-8904
Subject:
drainage; energy efficiency; fins; heat exchangers; heat pumps; heat transfer; models; surface tension
Abstract:
... The retention water on fin surface can significantly degrade the thermal performance of heat exchangers under periodic frosting/defrosting conditions, which also leads to a decrease in the energy efficiency of air-source heat pumps. A novel louvered fin design was suggested to improve the drainage and the thermal performance of heat exchanger. The novel louvered fin had an asymmetric louver arrang ...
DOI:
10.1016/j.enconman.2015.11.028

4. A novel method for improving the performance of thermoacoustic electric generator without resonator

Author:
Wang, Yufang; Li, Zhengyu; Li, Qing
Source:
Energy conversion and management 2016 v.110 pp. 135-141
ISSN:
0196-8904
Subject:
acoustics; cylinders; electric power; heat; methodology
Abstract:
... A thermoacoustic electric generator without resonator designed for aerospace application is discussed in this study, which is developed by a traveling-wave looped-tube thermoacoustic heat engine coupling with two linear alternators directly. A novel method of filling phase modulation object in the acoustic power output port is proposed to improve the performance of the thermoacoustic electric gene ...
DOI:
10.1016/j.enconman.2015.11.065

5. A proper analytical analysis of annular step porous fins for determining maximum heat transfer

Author:
Kundu, Balaram; Lee, Kwan-Soo
Source:
Energy conversion and management 2016 v.110 pp. 469-480
ISSN:
0196-8904
Subject:
analytical methods; fins; heat transfer; manufacturing
Abstract:
... The annular stepped fin is a common choice for enhancing heat transfer from a cylindrical primary surface. This typical fin shape is easy in manufacturing compared to the taper shape. There is still effort required to increase the heat transfer rate per unit mass of a step fin. With this design point of view, the present study has been carried out. There may be two design aspects to be adopted to ...
DOI:
10.1016/j.enconman.2015.09.037

6. Co-gasification of black liquor and pyrolysis oil: Evaluation of blend ratios and methanol production capacities

Author:
Andersson, Jim; Furusjö, Erik; Wetterlund, Elisabeth; Lundgren, Joakim; Landälv, Ingvar
Source:
Energy conversion and management 2016 v.110 pp. 240-248
ISSN:
0196-8904
Subject:
biofuels; gasification; market prices; methanol; mixing; oils; production costs; pulp; pyrolysis; waste liquors; Sweden
Abstract:
... The main aim of this study is to investigate integrated methanol production via co-gasification of black liquor (BL) and pyrolysis oil (PO), at Swedish pulp mills. The objectives are to evaluate techno-economically different blends ratios for different pulp mill capacities. Furthermore, the future methanol production potential in Sweden and overall system consequences of large-scale implementation ...
DOI:
10.1016/j.enconman.2015.12.027

7. Coupled heat transfer performance of a high temperature cup shaped porous absorber

Author:
Meng, Xian-long; Xia, Xin-lin; Zhang, Shun-de; Sellami, Nazmi; Mallick, Tapas
Source:
Energy conversion and management 2016 v.110 pp. 327-337
ISSN:
0196-8904
Subject:
aluminum oxide; heat transfer; mass flow; mathematical models; porosity; solar collectors; temperature
Abstract:
... In this article, a newly designed volumetric solar receiver (VSR) using cup-shaped Al2O3 porous absorber is studied through numerical simulations and experimental verification. The absorber achieves several advantages including lower heat loss and higher uniformity of heat flux. The ray tracing method is adopted to obtain the external radiation source. The inner radiative exchange within the cavit ...
DOI:
10.1016/j.enconman.2015.12.034

8. Decision-making model of generation technology under uncertainty based on real option theory

Author:
Ming, Zeng; Ping, Zhang; Shunkun, Yu; Ge, Zhang
Source:
Energy conversion and management 2016 v.110 pp. 59-66
ISSN:
0196-8904
Subject:
decision making; economic evaluation; electricity; fuels; heat; market competition; markets; models; power generation; prices; risk; uncertainty; uncertainty analysis; China
Abstract:
... The introduction of market competition and the increased uncertainty factors makes the generators have to decide not only on whether to invest generation capacity or not but also on what kind of generation technology to choose. In this paper, a decision-making model of generation technology investment is proposed. The irreversible investment concept and real option theory is introduced as the fund ...
DOI:
10.1016/j.enconman.2015.12.005

9. Design, assembly and characterization of silicide-based thermoelectric modules

Author:
Skomedal, Gunstein; Holmgren, Lennart; Middleton, Hugh; Eremin, I.S.; Isachenko, G.N.; Jaegle, Martin; Tarantik, Karina; Vlachos, Nikolas; Manoli, Maria; Kyratsi, Theodora; Berthebaud, David; Dao Truong, Nhi Y.; Gascoin, Franck
Source:
Energy conversion and management 2016 v.110 pp. 13-21
ISSN:
0196-8904
Subject:
bismuth; cold; electric generators; lead; magnesium; manganese; models; temperature; thermal expansion; toxicity
Abstract:
... Silicides have attracted considerable attention for use in thermoelectric generators due mainly to low cost, low toxicity and light weight, in contrast to conventional materials such as bismuth and lead telluride. Most reported work has focused on optimizing the materials properties while little has been done on module testing. In this work we have designed and tested modules based on N-type magne ...
DOI:
10.1016/j.enconman.2015.11.068

10. Development of life cycle water footprints for gas-fired power generation technologies

Author:
Ali, Babkir; Kumar, Amit
Source:
Energy conversion and management 2016 v.110 pp. 386-396
ISSN:
0196-8904
Subject:
cooling; cooling towers; natural gas; power generation; shale; steam; water footprint
Abstract:
... The key objective of this paper is to develop a benchmark for water demand coefficients of the complete life cycle of natural gas-fired power generation. Water demand coefficients include water consumption and water withdrawals for various stages of natural gas production as well as for power generation from it. Pathways were structured based on the unit operations of the types of natural gas sour ...
DOI:
10.1016/j.enconman.2015.12.048

11. Direct contact membrane water distillation assisted with solar energy

Author:
Elzahaby, Aly M.; Kabeel, A.E.; Bassuoni, M.M.; Elbar, Ayman Refat Abd
Source:
Energy conversion and management 2016 v.110 pp. 397-406
ISSN:
0196-8904
Subject:
desalination; direct contact; distillation; geometry; saline water; salt concentration; solar energy; water flow; water temperature
Abstract:
... An experimental and theoretical investigation for salt water desalination using tubular direct contact membrane distillation is introduced. The effect of operating and geometric parameters on the unit performance was studied. These parameters include feed water inlet temperature, feed water flow rate, salt concentration, cooling water temperature and membrane inner diameter and length. System ther ...
DOI:
10.1016/j.enconman.2015.12.046

12. Economic and environmental scheduling of smart homes with microgrid: DER operation and electrical tasks

Author:
Zhang, Di; Evangelisti, Sara; Lettieri, Paola; Papageorgiou, Lazaros G.
Source:
Energy conversion and management 2016 v.110 pp. 113-124
ISSN:
0196-8904
Subject:
carbon; carbon dioxide; case studies; correlation; economic sustainability; electric energy consumption; electricity; energy; energy costs; energy resources; greenhouse gas emissions; linear programming; models; prices; tariffs; United Kingdom
Abstract:
... Microgrids are promising in reducing energy consumption and carbon emissions, compared with the current centralised energy generation systems. Smart homes are becoming popular for their lower energy cost and provision of comfort. Flexible energy-consuming household tasks can be scheduled co-ordinately among multiple smart homes to reduce economic cost and CO2. However, the electricity tariff is no ...
DOI:
10.1016/j.enconman.2015.11.056

13. Effect of inhomogeneous compression of gas diffusion layer on the performance of PEMFC with interdigitated flow field

Author:
Mahmoudi, A.H.; Ramiar, A.; Esmaili, Q.
Source:
Energy conversion and management 2016 v.110 pp. 78-89
ISSN:
0196-8904
Subject:
catalysts; cathodes; deformation; fuel cells; models; water management
Abstract:
... In this paper, effects of inhomogeneous compression of GDL at the cathode side of proton-exchange membrane (PEM) fuel cell with interdigitated flow field on water management and cell performance has been numerically investigated.A 2D, isothermal, two-phase and multi-component transport model has been used in order to simulate the transport phenomena. The model consists the gas diffusion layer and ...
DOI:
10.1016/j.enconman.2015.12.012

14. Effect of microwave pretreatment on pyrolysis of crude glycerol–olive kernel alternative fuels

Author:
Ganesapillai, M.; Manara, P.; Zabaniotou, A.
Source:
Energy conversion and management 2016 v.110 pp. 287-295
ISSN:
0196-8904
Subject:
alternative fuels; biomass; energy-dispersive X-ray analysis; glycerol; lignocellulose; pyrolysis; renewable energy sources; scanning electron microscopy; seeds; synthesis gas; waste management
Abstract:
... Pyrolysis is considered to be a sustainable energy technology and is practiced widely in waste management. In this study, three issues were explored: (a) the implication of crude glycerol addition to lignocellulosic biomass in pyrolysis, (b) the effect of microwave pretreatment on the pyrolysis product yields and (c) study of pyrolysis parameters and assessment of products quality. Characterizatio ...
DOI:
10.1016/j.enconman.2015.12.045

15. Effects of component performance on overall performance of R410A air conditioner with oil flooding and regeneration

Author:
Luo, Baojun
Source:
Energy conversion and management 2016 v.110 pp. 192-199
ISSN:
0196-8904
Subject:
air conditioning; evaporation; oils; solubility; temperature; vapors
Abstract:
... Oil flooded compression with regenerator (OFCR) is one of the possible technologies to improve the performance of air conditioner. The addition of OFCR system to basic vapor compression system adds several components: oil separator, oil cooler and regenerator. These components can lead to a significant increase in performance. In this study, parametric studies of these components performance have ...
DOI:
10.1016/j.enconman.2015.12.024

16. Effects of pilot injection parameters on low temperature combustion diesel engines equipped with solenoid injectors featuring conventional and rate-shaped main injection

Author:
d’Ambrosio, S.; Ferrari, A.
Source:
Energy conversion and management 2016 v.110 pp. 457-468
ISSN:
0196-8904
Subject:
carbon monoxide; cylinders; diesel engines; emissions; energy use and consumption; gases; hydrocarbons; injectors; nitrogen oxides; soot; temperature
Abstract:
... The potential of pilot injection has been assessed on a low-temperature combustion diesel engine for automotive applications, which was characterized by a reduced compression-ratio, high EGR rates and postponed main injection timings. Dwell time sweeps have been carried out for pilot injections with distinct energizing times under different representative steady-state working conditions of the med ...
DOI:
10.1016/j.enconman.2015.12.014

17. Effects of psychrometric properties on fin performances of minimum envelope shape of wet fins

Author:
Kundu, Balaram; Lee, Kwan-Soo
Source:
Energy conversion and management 2016 v.110 pp. 481-493
ISSN:
0196-8904
Subject:
air; dewpoint; equations; fins; heat transfer; humidity; linear models; surface temperature; weight gain
Abstract:
... A method based on the variational principle is used to determine a minimum shape of wet fins for effective transfer of heat in fins. In many air-cooling applications, fin surface becomes wet as the surface is lower than the dewpoint temperature of the surrounding air. On the wet surface, both the sensible and latent heat transfer take place due to an existence of respective driving forces. The fin ...
DOI:
10.1016/j.enconman.2015.09.054

18. Electricity for development: Mini-grid solution for rural electrification in South Africa

Author:
Azimoh, Chukwuma Leonard; Klintenberg, Patrik; Wallin, Fredrik; Karlsson, Björn; Mbohwa, Charles
Source:
Energy conversion and management 2016 v.110 pp. 268-277
ISSN:
0196-8904
Subject:
cost effectiveness; developing countries; electricity; energy; households; income; natural resources; planning; production costs; rural development; rural electrification; socioeconomic development; viability; villages; South Africa
Abstract:
... The objective of most rural electrification programs in the developing world is to bring about socio-economic development to households. Governments have put in place a number of measures to achieve this goal. Previous studies on rural electrification programs in developing countries show that solar home systems and mini-grid systems are the dominant technologies. Assessments of a pilot hybrid min ...
DOI:
10.1016/j.enconman.2015.12.015

19. Empirical models for estimating daily global solar radiation in Yucatán Peninsula, Mexico

Author:
Quej, Victor H.; Almorox, Javier; Ibrakhimov, Mirzakhayot; Saito, Laurel
Source:
Energy conversion and management 2016 v.110 pp. 448-456
ISSN:
0196-8904
Subject:
air; humidity; hydrology; meteorological data; models; rain; solar radiation; temperature; Mexico
Abstract:
... This paper evaluates the accuracy and applicability of thirteen empirical global solar radiation models for warm subhumid regions that use daily meteorological data at six stations in Mexico (Yucatán Peninsula). One of the models investigated is a new empirical model developed for estimation of daily global solar radiation from a horizontal surface. The models were evaluated using root mean square ...
DOI:
10.1016/j.enconman.2015.12.050

20. Energetic and exergetic performance analysis of CdS/CdTe based photovoltaic technology in real operating conditions of composite climate

Author:
Rawat, Rahul; Kaushik, S.C.; Sastry, O.S.; Singh, Y.K.; Bora, B.
Source:
Energy conversion and management 2016 v.110 pp. 42-50
ISSN:
0196-8904
Subject:
climate; electrical properties; electricity; energy conservation; exergy; markets; solar collectors; time series analysis
Abstract:
... The solar photovoltaic (PV) technology market has increased rapidly with the continuously increasing electricity demand and climate concerns. With the increased PV installed capacity, the performance analysis of these systems has become critically important in order to ensure its reliable operation for a long lifetime, monetary payback and to identify the scope of improvement. The well-established ...
DOI:
10.1016/j.enconman.2015.11.069