Analytical investigation on impact of presence of MPL on temperature distribution in single cell of PEFC under high temperature condition

Autor: Akira NISHIMURA, Kohei YAMAMOTO, Tatsuya OKADO, Masafumi HIROTA
Jazyk: japonština
Rok vydání: 2020
Předmět:
Zdroj: Nihon Kikai Gakkai ronbunshu, Vol 86, Iss 883, Pp 19-00278-19-00278 (2020)
Druh dokumentu: article
ISSN: 2187-9761
DOI: 10.1299/transjsme.19-00278
Popis: Polymer Electrolyte Fuel Cell (PEFC) is desired to be operated over 90℃ during the period from 2020 to 2025 in Japan. The aim of this study is to clarify the impact of microporous layer (MPL) on the temperature profile of interface between polymer electrolyte membrane (PEM) and catalyst layer at the cathode (i.e., the reaction surface) in a single PEFC with an initial temperature of cell (Tini) from 80℃ to 100℃. An 1D multi-plate heat transfer model based on temperature data of separator measured using thermograph in power generation was developed to evaluate temperature of the reaction surface (Treact). This study investigated the effect of MPL, Tini, flow rate and relative humidity of supply gas on Treact distribution. As a result, it is found that the impact of flow rate of supply gas on Treact distribution is little irrespective of MPL, Tini and relative humidity of supply gas. When MPL is not coated, Treact – Tini is higher by 2℃ - 3℃ and relatively flat compared to MPL coating condition and Treact – Tini with MPL is increased by 1℃ from the inlet to outlet of cell irrespective of Tini and relative humidity of supply gas. In addition, it is revealed that Treact – Tini with MPL is the highest when the relative humidity of supply gas is 40 %RH at the anode and 40 %RH at the cathode, which is the lowest relative humidity condition in this study.
Databáze: Directory of Open Access Journals
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