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Polymer electrolyte membrane fuel cell efficiency at the stack level

Piela, Piotr and Mitzel, Jens (2015) Polymer electrolyte membrane fuel cell efficiency at the stack level. Journal of Power Sources, 292, pp. 95-103. Elsevier. DOI: 10.1016/j.jpowsour.2015.05.043 ISSN 0378-7753

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Official URL: http://authors.elsevier.com/a/1R2-u1M7w06SxU

Abstract

A redefinition of the fuel cell efficiency at the fuel cell stack level has been proposed for polymer electrolyte membrane fuel cells. The new definition takes into account not only the electrical efficiency of the stack but also the theoretical energy expenditures for bringing the stack feed streams to conditions required by the stack as well as the loss of fuel in the stack. A proposed general formula for the new stack efficiency has been adapted to three practical cases: the stationary combined heat and power, poweronly mobile, and direct methanol fuel cell applications. The redefined stack efficiency has been determined experimentally for a practically sized H2-fueled PEMFC stack and compared with the customary electric, or thermal, efficiency of this stack. Calculations have shown that the new stack efficiency can be very different from the electric efficiency, carrying additional information useful to a fuel cell system integrator.

Item URL in elib:https://elib.dlr.de/96413/
Document Type:Article
Title:Polymer electrolyte membrane fuel cell efficiency at the stack level
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Piela, PiotrICRIUNSPECIFIED
Mitzel, JensJens.Mitzel (at) dlr.deUNSPECIFIED
Date:13 May 2015
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:292
DOI :10.1016/j.jpowsour.2015.05.043
Page Range:pp. 95-103
Publisher:Elsevier
ISSN:0378-7753
Status:Published
Keywords:Fuel cell efficiency Fuel cell stack PEMFC DMFC Fuel cell system
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Mitzel, Dr. Jens
Deposited On:11 Jun 2015 10:29
Last Modified:11 Jun 2015 10:29

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