Exergetic efficiency rate of change and fuel cell degradation

M. Williams, A. Suzuki, A. Miyamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


The use of exergetic efficiency rate of change to evaluate fuel cell performance is developed and explained. It is important to understand the possible thermal efficiency a fuel cell system is capable of obtaining on a fuel and then what of this efficiency it actually achieves. The exergetic efficiency rate of change, is a natural and instantaneous measure of the change in fuel cell performance occurring at any time. There are three central performance measures for fuel cells. The first is exergetic efficiency which is measured by thermal efficiency. It permits the direct comparison of the performance of all fuel cell types operating on the same fuel, if desired. The second is exergetic efficiency rate of change which is useful in evaluating degradation which is the rate of change of ASR. The rate of change of exergetic efficiency is an effective way to directly relate degradation to fuel cell thermal efficiency. The third is power or power density which can be related to the economic viability of the fuel cell or fuel cell system.

Original languageEnglish
Title of host publicationFuel Cell Seminar 2010
Number of pages9
Publication statusPublished - 2011
Event2010 Fuel Cell Seminar and Exposition - San Antonio, TX, United States
Duration: 2010 Oct 182010 Oct 21

Publication series

NameECS Transactions
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737


Other2010 Fuel Cell Seminar and Exposition
Country/TerritoryUnited States
CitySan Antonio, TX

ASJC Scopus subject areas

  • Engineering(all)


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