Experimental study on system efficiency of air-cooled proton exchange membrane fuel cell

doi:10.19799/j.cnki.2095-4239.2020.0277

Abstract

Abstract:

System efficiency of air-cooled proton exchange membrane fuel cell (air-cooled PEMFC) is experimentally studied on full power range. Results show air-cooled PEMFC system efficiency is a parabola with the system power. With the increasing of the system power, system efficiency increases dramatically; system efficiency decreases slowly after it reaches the peak efficiency, and then almost approaches to a flat. The system efficiency is about 47% in the rated power, and the peak efficiency is about 56% nearby the 50% of rated power. A "dual-stack" PEMFC system is designed, that is to say the PEMFC system consists of two stacks. Hydrogen enters into the PEMFC stacks in series mode. Hydrogen from the previous stack anode end enters into the subsequent stack through a separator. Experimental results show performance of the dual-stack system is only better in higher power range compared to the single stack system with the same cells, and there has litter change in lower power range. The delightful result is the system efficiency significantly improves, and a 60.23% of peak efficiency is obtained. The efficiency of dual-stack system increases by 2%—4% in lower power range, and approximately increases by 5% in higher power range. This dual-stack PEMFC system has great practical valve.

Key words: air-cooled proton exchange membrane fuel cell system, full power range, system efficiency, dual-stack system

CLC Number:

TM 911.4

Junxiang ZHAI, Guangli HE, Zhuang XU, Congmin LIU. Experimental study on system efficiency of air-cooled proton exchange membrane fuel cell[J]. Energy Storage Science and Technology, 2020, 9(6): 1885-1889.

Figures/Tables 8

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