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Hydrogen gas gap heat switch operating in the 150 K to 400 K temperature range

2021-10Artigo científico Acesso aberto
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dc.contributor.authorBarreto, Jorge
dc.contributor.authorMartins, Daniel
dc.contributor.authorBranco, Moritz Castelo
dc.contributor.authorBranco, Joaquim
dc.contributor.authorGonçalves, António Pereira
dc.contributor.authorTirolien, Thierry
dc.contributor.authorBonfait, Grégoire
dc.contributor.institutionLIBPhys-UNL
dc.contributor.institutionDF – Departamento de Física
dc.contributor.pblElsevier Science B.V., Amsterdam.
dc.date.accessioned2022-06-29T22:29:34Z
dc.date.available2023-09-21T00:32:17Z
dc.date.embargoedUntil2023-09-20
dc.date.issued2021-10
dc.descriptionThis work was supported by ESA contract 4000114171/15/NL/KM Publisher Copyright: © 2021 Elsevier Ltd
dc.description.abstractA prototype of a compact hydrogen gas gap heat switch (GGHS), built using the difference in the linear thermal expansion coefficients of copper and stainless steel, was designed to work in the temperature range of 150 K to 400 K. Using hydrogen, nitrogen and helium as working gas, a gap of 18 µm was measured. With hydrogen, an ON/OFF switching ratio higher than 100 was obtained at 150 K. A sorption pump was integrated to the GGHS and filled with the metal hydride ZrMn2 to overcome the very low adsorption of hydrogen with activated carbon, material frequently used to manage the pressure in the gap. This solution allowed to reach both ON and OFF states by varying its temperature between 150 K and 300 K. The results obtained suggest that the proposed design allows for the development of tunable hydrogen heat switches while keeping the assembly very simple and sturdy.en
dc.description.versionauthorsversion
dc.description.versionpublished
dc.format.extent1176354
dc.identifier.doi10.1016/j.cryogenics.2021.103365
dc.identifier.issn0011-2275
dc.identifier.otherPURE: 42000588
dc.identifier.otherPURE UUID: faec0b27-55a3-49fe-979c-7356ed0ac093
dc.identifier.otherScopus: 85115145537
dc.identifier.otherWOS: 000703120000001
dc.identifier.urihttp://hdl.handle.net/10362/141058
dc.identifier.urlhttps://www.scopus.com/pages/publications/85115145537
dc.language.isoeng
dc.peerreviewedyes
dc.relationFunding Information: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FFIS%2F04559%2F2013/PT
dc.subjectAdsorption
dc.subjectGas Gap Heat Switch
dc.subjectHydrogen
dc.subjectMetal Hydride
dc.subjectThermal expansion
dc.subjectGeneral Materials Science
dc.subjectGeneral Physics and Astronomy
dc.titleHydrogen gas gap heat switch operating in the 150 K to 400 K temperature rangeen
dc.typejournal article
degois.publication.titleCryogenics
degois.publication.volume119
dspace.entity.typePublication
rcaap.rightsopenAccess

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