The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices

Detalhes bibliográficos
Autor(a) principal: António, Arsénio
Data de Publicação: 2018
Outros Autores: Rui, Melício, Carlos, Cardeira, Paulo, Branco
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/23877
https://doi.org/10.1109/TASC.2018.2801352
Resumo: This paper presents an experimentally verified finite-element multiphysics model developed to simulate the coupled electro and thermodynamic processes (electromagnetic, thermal, and fluid-flow with liquid-gas phase transition) occurring between liquid nitrogen (LN 2 ) and HTS YBCO bulks. The model allows estimating: 1) the thermal time constants related to bulk HTS losing/gaining its superconducting state, and mainly 2) the LN 2 liquid-to-gas flow rate due to superconductor Joule losses caused by electromagnetic induction heating of it. Model accuracy is evaluated, for example, by comparing the cooling time needed to zero-field-cool the YBCO bulk, and the quantity of LN 2 vaporized as the superconductor cool. Other important issues identified were time evolution and spatial distribution of temperature in the superconductor, heat flux, nitrogen liquid flow, and also nitrogen gas concentration for specific cooling scenarios. Full-scale experimental tests in our laboratory allowed us to validate with success the model and its effectiveness predictions.
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spelling The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devicesYttrium barium copper oxideMagnetic liquidsNitrogenHeat transferFinite element analysisMathematical modelThis paper presents an experimentally verified finite-element multiphysics model developed to simulate the coupled electro and thermodynamic processes (electromagnetic, thermal, and fluid-flow with liquid-gas phase transition) occurring between liquid nitrogen (LN 2 ) and HTS YBCO bulks. The model allows estimating: 1) the thermal time constants related to bulk HTS losing/gaining its superconducting state, and mainly 2) the LN 2 liquid-to-gas flow rate due to superconductor Joule losses caused by electromagnetic induction heating of it. Model accuracy is evaluated, for example, by comparing the cooling time needed to zero-field-cool the YBCO bulk, and the quantity of LN 2 vaporized as the superconductor cool. Other important issues identified were time evolution and spatial distribution of temperature in the superconductor, heat flux, nitrogen liquid flow, and also nitrogen gas concentration for specific cooling scenarios. Full-scale experimental tests in our laboratory allowed us to validate with success the model and its effectiveness predictions.2019-01-08T14:35:23Z2019-01-082018-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/23877http://hdl.handle.net/10174/23877https://doi.org/10.1109/TASC.2018.2801352enghttps://ieeexplore.ieee.org/document/8279450ndruimelicio@gmail.comndnd480António, ArsénioRui, MelícioCarlos, CardeiraPaulo, Brancoinfo: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:RCAAP2024-01-03T19:16:28Zoai:dspace.uevora.pt:10174/23877Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:14:40.039301Repositório 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 The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
title The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
spellingShingle The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
António, Arsénio
Yttrium barium copper oxide
Magnetic liquids
Nitrogen
Heat transfer
Finite element analysis
Mathematical model
title_short The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
title_full The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
title_fullStr The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
title_full_unstemmed The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
title_sort The critic liquid-gas phase transition between liquid nitrogen and YBCO HTS bulks: from FEM modeling to its experimental study for ZFC levitation devices
author António, Arsénio
author_facet António, Arsénio
Rui, Melício
Carlos, Cardeira
Paulo, Branco
author_role author
author2 Rui, Melício
Carlos, Cardeira
Paulo, Branco
author2_role author
author
author
dc.contributor.author.fl_str_mv António, Arsénio
Rui, Melício
Carlos, Cardeira
Paulo, Branco
dc.subject.por.fl_str_mv Yttrium barium copper oxide
Magnetic liquids
Nitrogen
Heat transfer
Finite element analysis
Mathematical model
topic Yttrium barium copper oxide
Magnetic liquids
Nitrogen
Heat transfer
Finite element analysis
Mathematical model
description This paper presents an experimentally verified finite-element multiphysics model developed to simulate the coupled electro and thermodynamic processes (electromagnetic, thermal, and fluid-flow with liquid-gas phase transition) occurring between liquid nitrogen (LN 2 ) and HTS YBCO bulks. The model allows estimating: 1) the thermal time constants related to bulk HTS losing/gaining its superconducting state, and mainly 2) the LN 2 liquid-to-gas flow rate due to superconductor Joule losses caused by electromagnetic induction heating of it. Model accuracy is evaluated, for example, by comparing the cooling time needed to zero-field-cool the YBCO bulk, and the quantity of LN 2 vaporized as the superconductor cool. Other important issues identified were time evolution and spatial distribution of temperature in the superconductor, heat flux, nitrogen liquid flow, and also nitrogen gas concentration for specific cooling scenarios. Full-scale experimental tests in our laboratory allowed us to validate with success the model and its effectiveness predictions.
publishDate 2018
dc.date.none.fl_str_mv 2018-06-01T00:00:00Z
2019-01-08T14:35:23Z
2019-01-08
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/10174/23877
http://hdl.handle.net/10174/23877
https://doi.org/10.1109/TASC.2018.2801352
url http://hdl.handle.net/10174/23877
https://doi.org/10.1109/TASC.2018.2801352
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://ieeexplore.ieee.org/document/8279450
nd
ruimelicio@gmail.com
nd
nd
480
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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
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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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