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Energies 2016, 9(4), 267; doi:10.3390/en9040267

Waste Heat Recovery of a PEMFC System by Using Organic Rankine Cycle

1
School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
2
Department of Automotive Engineering, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jang-Ho Lee
Received: 30 December 2015 / Revised: 14 March 2016 / Accepted: 29 March 2016 / Published: 5 April 2016
(This article belongs to the Special Issue Selected Papers from 5th Asia-Pacific Forum on Renewable Energy)
View Full-Text   |   Download PDF [6670 KB, uploaded 5 April 2016]   |  

Abstract

In this study, two systems are brought forward to recover the waste heat of a proton exchange membrane fuel cell (PEMFC), which are named the organic Rankine cycle (ORC), and heat pump (HP) combined organic Rankine cycle (HPORC). The performances of both systems are simulated on the platform of MATLAB with R123, R245fa, R134a, water, and ethanol being selected as the working fluid, respectively. The results show that, for PEMFC where operating temperature is constantly kept at 60 °C, there exists an optimum working temperature for each fluid in ORC and HPORC. In ORC, the maximal net power can be achieved with R245fa being selected as the working fluid. The corresponding thermal efficiency of the recovery system is 4.03%. In HPORC, the maximal net power can be achieved with water being selected in HP and R123 in ORC. The thermal efficiency of the recovery system increases to 4.73%. Moreover, the possibility of using ORC as the cooling system of PEMFC is also studied. The heat released from PEMFC stack is assumed to be wholly recovered by the ORC or HPORC system. The results indicate that the HPORC system is much more feasible for the cooling system of a PEMFC stack, since the heat recovery ability can be promoted due to the presence of HP. View Full-Text
Keywords: organic Rankine cycle; PEMFC; waste heat recovery; heat pump organic Rankine cycle; PEMFC; waste heat recovery; heat pump
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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He, T.; Shi, R.; Peng, J.; Zhuge, W.; Zhang, Y. Waste Heat Recovery of a PEMFC System by Using Organic Rankine Cycle. Energies 2016, 9, 267.

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