Numerical Analysis of PEMFC Unsteady Performance Considering Water and Thermal Transport

Three-dimensional, non-isothermal, unsteady numerical model considering liquid water transport inside GDL has been developed, and the effect of water transport on cell performance has been investigated. We also conducted liquid water visualization by synchrotron X-ray and it was found that liquid wa...

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Main Authors: Fukuda, Takanori, Sato, Akira, Araki, Takuto
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Sato, Akira
Araki, Takuto
description Three-dimensional, non-isothermal, unsteady numerical model considering liquid water transport inside GDL has been developed, and the effect of water transport on cell performance has been investigated. We also conducted liquid water visualization by synchrotron X-ray and it was found that liquid water in GDL has extremely wide size distributions, and the distribution strongly varied by their creation processes. Then we assume that liquid water in GDL forms droplets which has different diameters and thermal conductivity and diffusion coefficient depend on the droplet size. In this paper, a numerical model considering liquid water transport in a flow channel and GDL has been developed, and it is discussed how droplets in GDL have an impact on steady and unsteady responses of PEMFC power generating characteristics. As a result , droplets in GDL have a lot of influence on voltage responses.
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title Numerical Analysis of PEMFC Unsteady Performance Considering Water and Thermal Transport
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