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Review on Dimensionless Numbers Relevant for Polymer Electrolyte Fuel Cells

In English

Författare

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.

Avdelning/ar

Publiceringsår

2016-08-22

Språk

Svenska

Sidor

547-552

Publikation/Tidskrift/Serie

ECS Transactions

Volym

75

Issue

14

Dokumenttyp

Artikel i tidskrift

Förlag

Electrochemical Society

Ämne

  • Energy Engineering

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1938-6737