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Thermal conductivity and contact resistance of compressed gas diffusion layer of PEM fuel cell

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Nitta, Iwao
dc.contributor.author Himanen, Olli
dc.contributor.author Mikkola, Mikko
dc.date.accessioned 2011-11-28T13:16:03Z
dc.date.available 2011-11-28T13:16:03Z
dc.date.issued 2008
dc.identifier.isbn 978-951-22-9216-5
dc.identifier.issn 1459-7268
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/867
dc.description.abstract This paper discusses the effect of compression pressure on the mechanical and thermal properties of gas diffusion layers (GDL). The stress-strain curve of the GDL revealed one nonlinear and two piecewise linear regions within the compression pressure range of 0 to 5.5 MPa. The thermal conductivity of the compressed GDL was found to be independent of the compression pressure and was determined to be 1.18 ± 0.11 W m-1 K-1. The thermal contact resistance between the GDL and graphite was evaluated by augmenting experiments with computer modeling. The thermal contact resistance decreased nonlinearly with increasing compression pressure. According to results here, the thermal bulk resistance of the GDL is comparable to the thermal contact resistance between the GDL and graphite. A simple one dimensional model predicted a temperature drop of 1.7-4.4 °C across the GDL and catalyst layer depending on compression pressures. en
dc.format.extent 19
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.ispartofseries Helsinki University of Technology publications in engineering physics. A en
dc.relation.ispartofseries Teknillisen korkeakoulun teknillisen fysiikan julkaisuja. A fi
dc.relation.ispartofseries 853 en
dc.subject.other Physics en
dc.subject.other Energy en
dc.title Thermal conductivity and contact resistance of compressed gas diffusion layer of PEM fuel cell en
dc.type D4 Julkaistu kehittämis- tai tutkimusraportti taikka -selvitys fi
dc.contributor.school Faculty of Information and Natural Sciences en
dc.contributor.school Informaatio- ja luonnontieteiden tiedekunta fi
dc.contributor.department Department of Engineering Physics en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.subject.keyword inhomogeneous compression en
dc.subject.keyword gas diffusion layer en
dc.subject.keyword PEM fuel cells en
dc.subject.keyword thermal conductivity en
dc.subject.keyword thermal contact resistance en
dc.subject.keyword stress-strain curve en
dc.identifier.urn urn:nbn:fi:tkk-010237
dc.type.dcmitype text en

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