文献类型：期刊文献

英文题名：Energy and exergy analysis of microfluidic fuel cell

作者：Zhang, Hao[1,2];Leung, Michael K. H.[2];Xuan, Jin[1,2];Xu, Hong[1];Zhang, Li[1];Leung, Dennis Y. C.[3];Wang, Huizhi[3]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]City Univ Hong Kong, Abil R&D Energy Res Ctr, Sch Energy & Environm, Hong Kong, Hong Kong, Peoples R China;[3]Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

年份：2013

卷号：38

期号：15

起止页码：6526

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20132116345806);WOS:【SCI-EXPANDED(收录号:WOS:000319233000027)】；

基金：The research work presented in this paper was funded by Ability R&D Energy Research Centre, CityU SRG Grant 7002782, The University of Hong Kong, the Shanghai Pujiang Program (12PJ1402100), and the Fundamental Research Funds for the Central Universities, P.R. China.

语种：英文

外文关键词：Microfluidic fuel cell; Fuel recirculation; Energy efficiency; Exergy efficiency

摘要：Microfluidic fuel cell (MFC) is a promising fuel cell type because its membraneless feature implies great potential for low-cost commercialization. In this study, an energy and exergy analysis of MFC is performed by numerical simulation coupling computational fluid dynamics (CFD) with electrochemical kinetics. MFC system designs with and without fuel recirculation are investigated. The effects of micropump efficiency, fuel flow rate and fuel concentration on the MFC system performance are evaluated. The results indicate that fuel recirculation is preferred for MFC to gain higher exergy efficiency only if the efficiency of the micropump is sufficiently high. Optimal cell operating voltage for achieving the highest exergy efficiency can be obtained. Parasitic effect will cause a significant reduction in the exergy efficiency. An increase in the fuel concentration will also lead to a reduction in the exergy efficiency. Increasing the fuel flow rate in a MFC with fuel recirculation will cause a fluctuating variation in the exergy efficiency. On the other hand, in a one-off MFC system, the exergy efficiency decreases with increasing fuel flow rate. The present work enables better understanding of the energy conversion in MFC and facilitates design optimization of MFC. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.