Numerical Investigation of Convergent and Divergent Parallel Flow Fields for PEMFCs

Küçük Resim Yok

Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

John Wiley and Sons Ltd

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

In this study, the classical parallel flow field pattern is modified by a convergent and divergent design concept for proton exchange membrane fuel cells (PEMFCs). The modification is achieved by varying the channel depth with different constant inclination gradients from the inlet to the outlet, along with the bipolar plate width which creates either a convergent or divergent flow field depending on the position of the inlet and outlet selected. The numerical model is solved to predict the cell performance including the mass transport, water vapor concentration and, pressure and current density distribution for the flow fields. The numerical results reveal that the modified convergent parallel flow fields have a better mass transport and water removal characteristics than those in the conventional one, whereas mal-distribution of species and excessive water concentration occur in the conventional and divergent parallel flow fields. Introducing convergent parallel flow field design concept not only minimizes these issues but the cell power density is also improved by a maximum of 16%, which can show a new window in PEMFC flow field design concept. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Açıklama

Anahtar Kelimeler

Current Density, Flow Field Design, Mass Transport, Proton Exchange Membrane Fuel Cells, Water Concentration

Kaynak

Fuel Cells

WoS Q Değeri

Q3

Scopus Q Değeri

Q2

Cilt

18

Sayı

4

Künye