Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity

Thermal management is an essential aspect in the design and operation of a Polymer Electrolyte Membrane (PEM) fuel cell where cooling effectiveness directly influences energy conversion performance. Two air-cooled closed cathode PEM fuel cell stacks with varied cooling channel aspect ratio was devel...

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Published in:20th World Hydrogen Energy Conference, WHEC 2014
Main Author: Mohamed W.
Format: Conference paper
Language:English
Published: Committee of WHEC2014 2014
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924902486&partnerID=40&md5=042512ed720bae0de38b02b7f03f0fd1
id 2-s2.0-84924902486
spelling 2-s2.0-84924902486
Mohamed W.
Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
2014
20th World Hydrogen Energy Conference, WHEC 2014
3


https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924902486&partnerID=40&md5=042512ed720bae0de38b02b7f03f0fd1
Thermal management is an essential aspect in the design and operation of a Polymer Electrolyte Membrane (PEM) fuel cell where cooling effectiveness directly influences energy conversion performance. Two air-cooled closed cathode PEM fuel cell stacks with varied cooling channel aspect ratio was developed for experimental cooling effectiveness analysis. The first stack, labeled D1, integrates 40 cooling channels with an aspect ratio of 1.7 while stack D2 has 20 channels with an aspect ratio of 3.8. The analysis is focused at 20A and 30A loads and applied a cooling fan coupling of positive and negative pressure flows. The cooling air humidity was varied by humidifying the air from an ambient value of 50% to 90% relative humidity. The translation of mean stack temperature data to stack energy changes shows an exponential cooling response profile. A steady-state cooling rate were obtained from the stack cooling profile and compared with the generated thermal energy to obtain the cooling effectiveness at each operating mode. Stack D1, with lower aspect ratio and higher number of channels, yields a better cooling performance with dry air with the penalty of slower cooling response. Larger channels of stack D2 show a greater compatibility to moist air cooling with cooling stability as another strong characteristic.
Committee of WHEC2014

English
Conference paper

author Mohamed W.
spellingShingle Mohamed W.
Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
author_facet Mohamed W.
author_sort Mohamed W.
title Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
title_short Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
title_full Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
title_fullStr Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
title_full_unstemmed Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
title_sort Cooling effectiveness of cooling fan coupling on polymer electrolyte membrane fuel cell stacks with varied channel aspect ratios and air humidity
publishDate 2014
container_title 20th World Hydrogen Energy Conference, WHEC 2014
container_volume 3
container_issue
doi_str_mv
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924902486&partnerID=40&md5=042512ed720bae0de38b02b7f03f0fd1
description Thermal management is an essential aspect in the design and operation of a Polymer Electrolyte Membrane (PEM) fuel cell where cooling effectiveness directly influences energy conversion performance. Two air-cooled closed cathode PEM fuel cell stacks with varied cooling channel aspect ratio was developed for experimental cooling effectiveness analysis. The first stack, labeled D1, integrates 40 cooling channels with an aspect ratio of 1.7 while stack D2 has 20 channels with an aspect ratio of 3.8. The analysis is focused at 20A and 30A loads and applied a cooling fan coupling of positive and negative pressure flows. The cooling air humidity was varied by humidifying the air from an ambient value of 50% to 90% relative humidity. The translation of mean stack temperature data to stack energy changes shows an exponential cooling response profile. A steady-state cooling rate were obtained from the stack cooling profile and compared with the generated thermal energy to obtain the cooling effectiveness at each operating mode. Stack D1, with lower aspect ratio and higher number of channels, yields a better cooling performance with dry air with the penalty of slower cooling response. Larger channels of stack D2 show a greater compatibility to moist air cooling with cooling stability as another strong characteristic.
publisher Committee of WHEC2014
issn
language English
format Conference paper
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record_format scopus
collection Scopus
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