Building a thinner gap in a gas-gap heat switch

Detalhes bibliográficos
Autor(a) principal: Franco, João
Data de Publicação: 2015
Outros Autores: Galinhas, Bruno, Martins, Daniel, Sousa, Patrícia Borges de, Catarino, Isabel, Bonfait, Gregoire
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/15298
Resumo: 25th International Cryogenic Engineering Conference and the International Cryogenic Materials Conference in 2014, ICEC 25–ICMC 2014
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spelling Building a thinner gap in a gas-gap heat switchGas gap heat switchDifferential thermal expansion25th International Cryogenic Engineering Conference and the International Cryogenic Materials Conference in 2014, ICEC 25–ICMC 2014A gas-gap heat switch (GGHS) reaches its highest conductance state when the gap between two exchange surfaces is filled with a conducting gas in a viscous regime. The broader the surface and the thinner the gap, the higher the ON conductance achieved. In this paper we describe a very thin cold gas-gap heat switch reached upon the use of the differential thermal expansion of the construction materials. Such technique overcomes the intricacies of the manufacturing process of the switch. We designed built and tested a prototype of a very thin gap heat switch using our new methodology. The high conductance was measured with both helium and nitrogen, at temperatures ranging from 20 K (He) or 75 K (N2) up to room temperature. The inferred gap opening at low temperature (| 17 Pm) has shown to be slightly above the expected, which allowed us to reinterpret the design calculations. The switch was also characterized along its extreme conductance states while using a sorption pump, and its performance was compared with a previously developed model. Lessons learned from the first prototype led us to build a second one with better performance. Our experiments suggest that the proposed design allows for the development of a customized cryogenic switch with improved ON conductance while keeping the assembly very simple and sturdy, hence widening the scope of applicability of these devices.ElsevierRUNFranco, JoãoGalinhas, BrunoMartins, DanielSousa, Patrícia Borges deCatarino, IsabelBonfait, Gregoire2015-07-17T11:10:18Z2015-07-162015-07-16T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10362/15298engPhysics Procedia 67 ( 2015 ) 1117 – 1122)10.1016/j.phpro.2015.06.173info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T03:51:09Zoai:run.unl.pt:10362/15298Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:22:25.370768Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Building a thinner gap in a gas-gap heat switch
title Building a thinner gap in a gas-gap heat switch
spellingShingle Building a thinner gap in a gas-gap heat switch
Franco, João
Gas gap heat switch
Differential thermal expansion
title_short Building a thinner gap in a gas-gap heat switch
title_full Building a thinner gap in a gas-gap heat switch
title_fullStr Building a thinner gap in a gas-gap heat switch
title_full_unstemmed Building a thinner gap in a gas-gap heat switch
title_sort Building a thinner gap in a gas-gap heat switch
author Franco, João
author_facet Franco, João
Galinhas, Bruno
Martins, Daniel
Sousa, Patrícia Borges de
Catarino, Isabel
Bonfait, Gregoire
author_role author
author2 Galinhas, Bruno
Martins, Daniel
Sousa, Patrícia Borges de
Catarino, Isabel
Bonfait, Gregoire
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv RUN
dc.contributor.author.fl_str_mv Franco, João
Galinhas, Bruno
Martins, Daniel
Sousa, Patrícia Borges de
Catarino, Isabel
Bonfait, Gregoire
dc.subject.por.fl_str_mv Gas gap heat switch
Differential thermal expansion
topic Gas gap heat switch
Differential thermal expansion
description 25th International Cryogenic Engineering Conference and the International Cryogenic Materials Conference in 2014, ICEC 25–ICMC 2014
publishDate 2015
dc.date.none.fl_str_mv 2015-07-17T11:10:18Z
2015-07-16
2015-07-16T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/15298
url http://hdl.handle.net/10362/15298
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Physics Procedia 67 ( 2015 ) 1117 – 1122)
10.1016/j.phpro.2015.06.173
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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