Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.6/13829 |
Resumo: | Heat switches are devices for controlling heat flow in various applications, such as electronic devices, cryogenic cooling systems, spacecraft, and rockets. These devices require non-linear transient thermal simulations, in which there is a lack of information. In this study, we introduce an innovative 1D thermo-hydraulic lumped parameter model to simulate loop heat pipes as heat switches by regulating the temperature difference between the evaporator and the compensation chamber. The developed thermo-hydraulic model uses the continuity, energy, and momentum equations to represent the behaviour of loop heat pipes as heat switches. The model also highlights the importance of some thermal conductance parameters and correction coefficients for accurately simulating the different operational states of a loop heat pipe. The simulations are conducted using the proposed 1D model, solved through the application of the Mathcad block function. The numerical model presented is successfully validated by comparing the temperatures of the evaporator and condenser inlet nodes with those of a referenced loop heat pipe from the literature. In conclusion, in this research, the mathematical modelling of loop heat pipes as heat switches is presented. This is achieved by incorporating correction coefficients with Boolean logic that results in non-linear transient simulations. The presented 1D thermo-hydraulic lumped parameter model serves as a valuable tool for thermal system design, particularly for systems with non-linear operational modes like sorption compressors. The graphical and nodal representation of this proposed 1D thermo-hydraulic model further enhances its utility in understanding and optimising loop heat pipes as heat switches across various thermal management scenarios. |
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Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space SystemsHeat switchLoop heat pipeLumped parameter model1D thermo-hydraulic modelDry-outStart-upAerospaceSpace systemsHeat switches are devices for controlling heat flow in various applications, such as electronic devices, cryogenic cooling systems, spacecraft, and rockets. These devices require non-linear transient thermal simulations, in which there is a lack of information. In this study, we introduce an innovative 1D thermo-hydraulic lumped parameter model to simulate loop heat pipes as heat switches by regulating the temperature difference between the evaporator and the compensation chamber. The developed thermo-hydraulic model uses the continuity, energy, and momentum equations to represent the behaviour of loop heat pipes as heat switches. The model also highlights the importance of some thermal conductance parameters and correction coefficients for accurately simulating the different operational states of a loop heat pipe. The simulations are conducted using the proposed 1D model, solved through the application of the Mathcad block function. The numerical model presented is successfully validated by comparing the temperatures of the evaporator and condenser inlet nodes with those of a referenced loop heat pipe from the literature. In conclusion, in this research, the mathematical modelling of loop heat pipes as heat switches is presented. This is achieved by incorporating correction coefficients with Boolean logic that results in non-linear transient simulations. The presented 1D thermo-hydraulic lumped parameter model serves as a valuable tool for thermal system design, particularly for systems with non-linear operational modes like sorption compressors. The graphical and nodal representation of this proposed 1D thermo-hydraulic model further enhances its utility in understanding and optimising loop heat pipes as heat switches across various thermal management scenarios.The authors acknowledge the support provided by the Research project called Mobilising Agenda: New Space Portugal (Ref. C644936537-00000046, Notice ACC02/CO5-i01/2022, funded by the “Mobilising Agendas for Business Innovation” through the “Recovery and Resilience Programme (PRR)” and by Portugal 2020 through the Competitiveness and Internationalisation Operational Programme and the Lisbon Regional Operational Programme and co-financed by “FEDER”; and FCTMDPI AGuBibliorumCastanheira, João Pedro ConceiçãoDias, Nicole G.Melício, RuiGordo, PauloSilva, AndréPereira, Roger Michael2023-12-14T11:54:41Z2023-11-212023-11-21T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.6/13829engCastanheira, J.P.; Dias, N.G.; Melicio, R.; Gordo, P.; Silva, A.R.R.; Pereira, R.M. Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems. Appl. Sci. 2023, 13, 12547. https://doi.org/10.3390/app1323125472673-459110.3390/app132312547info: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:RCAAP2023-12-15T09:57:34Zoai:ubibliorum.ubi.pt:10400.6/13829Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:53:10.970667Repositório 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 |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
title |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
spellingShingle |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems Castanheira, João Pedro Conceição Heat switch Loop heat pipe Lumped parameter model 1D thermo-hydraulic model Dry-out Start-up Aerospace Space systems |
title_short |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
title_full |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
title_fullStr |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
title_full_unstemmed |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
title_sort |
Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems |
author |
Castanheira, João Pedro Conceição |
author_facet |
Castanheira, João Pedro Conceição Dias, Nicole G. Melício, Rui Gordo, Paulo Silva, André Pereira, Roger Michael |
author_role |
author |
author2 |
Dias, Nicole G. Melício, Rui Gordo, Paulo Silva, André Pereira, Roger Michael |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
uBibliorum |
dc.contributor.author.fl_str_mv |
Castanheira, João Pedro Conceição Dias, Nicole G. Melício, Rui Gordo, Paulo Silva, André Pereira, Roger Michael |
dc.subject.por.fl_str_mv |
Heat switch Loop heat pipe Lumped parameter model 1D thermo-hydraulic model Dry-out Start-up Aerospace Space systems |
topic |
Heat switch Loop heat pipe Lumped parameter model 1D thermo-hydraulic model Dry-out Start-up Aerospace Space systems |
description |
Heat switches are devices for controlling heat flow in various applications, such as electronic devices, cryogenic cooling systems, spacecraft, and rockets. These devices require non-linear transient thermal simulations, in which there is a lack of information. In this study, we introduce an innovative 1D thermo-hydraulic lumped parameter model to simulate loop heat pipes as heat switches by regulating the temperature difference between the evaporator and the compensation chamber. The developed thermo-hydraulic model uses the continuity, energy, and momentum equations to represent the behaviour of loop heat pipes as heat switches. The model also highlights the importance of some thermal conductance parameters and correction coefficients for accurately simulating the different operational states of a loop heat pipe. The simulations are conducted using the proposed 1D model, solved through the application of the Mathcad block function. The numerical model presented is successfully validated by comparing the temperatures of the evaporator and condenser inlet nodes with those of a referenced loop heat pipe from the literature. In conclusion, in this research, the mathematical modelling of loop heat pipes as heat switches is presented. This is achieved by incorporating correction coefficients with Boolean logic that results in non-linear transient simulations. The presented 1D thermo-hydraulic lumped parameter model serves as a valuable tool for thermal system design, particularly for systems with non-linear operational modes like sorption compressors. The graphical and nodal representation of this proposed 1D thermo-hydraulic model further enhances its utility in understanding and optimising loop heat pipes as heat switches across various thermal management scenarios. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-12-14T11:54:41Z 2023-11-21 2023-11-21T00:00:00Z |
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/10400.6/13829 |
url |
http://hdl.handle.net/10400.6/13829 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Castanheira, J.P.; Dias, N.G.; Melicio, R.; Gordo, P.; Silva, A.R.R.; Pereira, R.M. Modelling a Loop Heat Pipe as Heat Switch for Transient Application in Space Systems. Appl. Sci. 2023, 13, 12547. https://doi.org/10.3390/app132312547 2673-4591 10.3390/app132312547 |
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 |
MDPI AG |
publisher.none.fl_str_mv |
MDPI AG |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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