Model of two-phase flow and flooding dynamics in polymer electrolyte fuel cells

Hua Meng, Chao-yang Wang

Research output: Contribution to journalArticle

179 Citations (Scopus)

Abstract

A mathematical model for two-phase flow and flooding dynamics in polymer electrolyte fuel cells (PEFCs) has been developed based on recent experimental observations. This three-dimensional PEFC model consists of four submodels to account for two-phase phenomena, including a catalyst coverage model in the catalyst layer, a two-phase transport model in the gas diffusion layer (GDL), a liquid coverage model at the GDL-channel interface, and a two-phase flow model in the gas channel (GC). The multiphase mixture (M2) model is employed to describe liquid water transport in the GDL while a mist flow model is used in the gas channel. An interfacial coverage model by liquid water at the GDL/GC interface is developed, for the first time, to account for water droplet emergence on the GDL surface. The inclusion of this interfacial model not only gives the present two-phase model a capability to predict the cathode flooding effect on cell performance, but also ultimately removes the inability of prior two-phase models to correctly capture effects of the gas velocity (or stoichiometry) on cell performance.

Original languageEnglish (US)
JournalJournal of the Electrochemical Society
Volume152
Issue number9
DOIs
StatePublished - Oct 7 2005

Fingerprint

two phase flow
Two phase flow
Electrolytes
fuel cells
Fuel cells
Polymers
electrolytes
polymers
gaseous diffusion
Diffusion in gases
Gases
gases
Water
Liquids
liquids
capture effect
water
mist
catalysts
Catalysts

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

Cite this

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Model of two-phase flow and flooding dynamics in polymer electrolyte fuel cells. / Meng, Hua; Wang, Chao-yang.

In: Journal of the Electrochemical Society, Vol. 152, No. 9, 07.10.2005.

Research output: Contribution to journalArticle

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