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Review on Dimensionless Numbers Relevant for Polymer Electrolyte Fuel Cells

På svenska

Author

Summary, in English

With the concern about global warming, air pollution and energy security, the prospect of using polymer electrolyte fuel cells (PEFCs) in future sustainable and renewable energy conversion systems has achieved substantial momentum. Dimensionless numbers can be determined before construction of a model is started, to make simple estimations on the transport processes, for example, within the porous PEFC GDL. Microstructural parameters, such as tortuosities and contact angles, are frequently treated as fitting parameters used in the respective governing equations, such that unrealistic values could be assumed or properties could not be representative of the corresponding microstructure. This treatment can be avoided if the origin of the expression is clearly clarified and if geometric properties are not used for fitting. Instead, it is recommended to, when needed, introduce parameters, without a geometrical meaning used only for fitting the model to experimental data, such as the pre-exponential factor in the advanced microstructural approach.

Department/s

Publishing year

2016-08-22

Language

Swedish

Pages

547-552

Publication/Series

ECS Transactions

Volume

75

Issue

14

Document type

Journal article

Publisher

Electrochemical Society

Topic

  • Energy Engineering

Status

Published

ISBN/ISSN/Other

  • ISSN: 1938-6737