Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets

DEMO reactor is projected as a technological demonstrator and a component test reactor for several key systems such as the breeding blanket. The dual coolant lithium lead (DCLL) is one promising breeding blanket candidate that performs the functions of shielding, part of the cooling and breeding wit...

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Autores: Suárez Cambra, Daniel|||0000-0002-5174-0100, Iraola de Acevedo, Eduardo|||0000-0002-0837-7086, Lampon Diestre, Cristina|||0000-0001-9793-5694, Mas de les Valls Ortiz, Elisabet|||0000-0003-0134-0325, Batet Miracle, Lluís|||0000-0003-1882-6313
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/360632
Acceso en línea:https://hdl.handle.net/2117/360632
https://dx.doi.org/10.1016/j.fusengdes.2021.112503
Access Level:acceso abierto
Palabra clave:Nuclear reactors
Nuclear physics
Magnetohydrodynamics
Heat transfer
Breeding Blanket
DCLL
EU-DEMO
Computational Fluid Dynamics
Reactors nuclears
Física nuclear
Àrees temàtiques de la UPC::Energies::Energia nuclear
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spelling Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blanketsSuárez Cambra, Daniel|||0000-0002-5174-0100Iraola de Acevedo, Eduardo|||0000-0002-0837-7086Lampon Diestre, Cristina|||0000-0001-9793-5694Mas de les Valls Ortiz, Elisabet|||0000-0003-0134-0325Batet Miracle, Lluís|||0000-0003-1882-6313Nuclear reactorsNuclear physicsMagnetohydrodynamicsHeat transferBreeding BlanketDCLLEU-DEMOComputational Fluid DynamicsReactors nuclearsFísica nuclearÀrees temàtiques de la UPC::Energies::Energia nuclearDEMO reactor is projected as a technological demonstrator and a component test reactor for several key systems such as the breeding blanket. The dual coolant lithium lead (DCLL) is one promising breeding blanket candidate that performs the functions of shielding, part of the cooling and breeding with the same liquid metal fluid. PbLi is also in charge of transporting the bred tritium to the Tritium Extraction System. Structural cooling of the blanket walls is performed by pressurized helium flow which also transfers heat to the balance of plant. Keeping a proper distribution of thermal loads between the two coolants is a key aspect to reach a plant high efficiency. The thermal power transferred from the liquid metal to the helium channels depends on the flow regime. While liquid metal flows under the magnetic field, the magnetohydrodynamic (MHD) phenomena will occur, influencing the flow regime and the velocity profile. The heat is volumetrically deposited in the liquid metal coolant due to the interaction between the highly energetic neutrons originated in the plasma and the coolant. The heat deposition profile is roughly exponential causing temperature differences across the same channel cross section. Temperature gradients induce buoyant effects altering the expected MHD profile and affecting the heat transfer rate from the liquid metal to the surrounding walls cooled with helium. It is of utmost interest to identify the effects of the main flow parameters on the heat transfer coefficient under such complex conditions. The work studies computationally a domain consisting of a liquid region and a surrounding solid region electrically and thermally coupled using latest EU DCLL design characteristics. A fully developed flow is assumed where buoyancy is modelled under the Boussinesq approximation. Joule effect has been considered negligible compared to the neutron deposition. The influence of the buoyant MHD phenomena to the heat transfer coefficient is analysed parametrically with a CFD solver implemented in OpenFOAM®. The parameters investigated here are the Reynolds, Hartmann and Grashof numbers, the Grashof ratio, and the wall conductance ratio (cw).Peer Reviewed20212021-09-0120222022-01-25journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/360632https://dx.doi.org/10.1016/j.fusengdes.2021.112503reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3606322026-05-27T15:37:01Z
dc.title.none.fl_str_mv Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
title Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
spellingShingle Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
Suárez Cambra, Daniel|||0000-0002-5174-0100
Nuclear reactors
Nuclear physics
Magnetohydrodynamics
Heat transfer
Breeding Blanket
DCLL
EU-DEMO
Computational Fluid Dynamics
Reactors nuclears
Física nuclear
Àrees temàtiques de la UPC::Energies::Energia nuclear
title_short Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
title_full Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
title_fullStr Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
title_full_unstemmed Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
title_sort Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets
dc.creator.none.fl_str_mv Suárez Cambra, Daniel|||0000-0002-5174-0100
Iraola de Acevedo, Eduardo|||0000-0002-0837-7086
Lampon Diestre, Cristina|||0000-0001-9793-5694
Mas de les Valls Ortiz, Elisabet|||0000-0003-0134-0325
Batet Miracle, Lluís|||0000-0003-1882-6313
author Suárez Cambra, Daniel|||0000-0002-5174-0100
author_facet Suárez Cambra, Daniel|||0000-0002-5174-0100
Iraola de Acevedo, Eduardo|||0000-0002-0837-7086
Lampon Diestre, Cristina|||0000-0001-9793-5694
Mas de les Valls Ortiz, Elisabet|||0000-0003-0134-0325
Batet Miracle, Lluís|||0000-0003-1882-6313
author_role author
author2 Iraola de Acevedo, Eduardo|||0000-0002-0837-7086
Lampon Diestre, Cristina|||0000-0001-9793-5694
Mas de les Valls Ortiz, Elisabet|||0000-0003-0134-0325
Batet Miracle, Lluís|||0000-0003-1882-6313
author2_role author
author
author
author
dc.subject.none.fl_str_mv Nuclear reactors
Nuclear physics
Magnetohydrodynamics
Heat transfer
Breeding Blanket
DCLL
EU-DEMO
Computational Fluid Dynamics
Reactors nuclears
Física nuclear
Àrees temàtiques de la UPC::Energies::Energia nuclear
topic Nuclear reactors
Nuclear physics
Magnetohydrodynamics
Heat transfer
Breeding Blanket
DCLL
EU-DEMO
Computational Fluid Dynamics
Reactors nuclears
Física nuclear
Àrees temàtiques de la UPC::Energies::Energia nuclear
description DEMO reactor is projected as a technological demonstrator and a component test reactor for several key systems such as the breeding blanket. The dual coolant lithium lead (DCLL) is one promising breeding blanket candidate that performs the functions of shielding, part of the cooling and breeding with the same liquid metal fluid. PbLi is also in charge of transporting the bred tritium to the Tritium Extraction System. Structural cooling of the blanket walls is performed by pressurized helium flow which also transfers heat to the balance of plant. Keeping a proper distribution of thermal loads between the two coolants is a key aspect to reach a plant high efficiency. The thermal power transferred from the liquid metal to the helium channels depends on the flow regime. While liquid metal flows under the magnetic field, the magnetohydrodynamic (MHD) phenomena will occur, influencing the flow regime and the velocity profile. The heat is volumetrically deposited in the liquid metal coolant due to the interaction between the highly energetic neutrons originated in the plasma and the coolant. The heat deposition profile is roughly exponential causing temperature differences across the same channel cross section. Temperature gradients induce buoyant effects altering the expected MHD profile and affecting the heat transfer rate from the liquid metal to the surrounding walls cooled with helium. It is of utmost interest to identify the effects of the main flow parameters on the heat transfer coefficient under such complex conditions. The work studies computationally a domain consisting of a liquid region and a surrounding solid region electrically and thermally coupled using latest EU DCLL design characteristics. A fully developed flow is assumed where buoyancy is modelled under the Boussinesq approximation. Joule effect has been considered negligible compared to the neutron deposition. The influence of the buoyant MHD phenomena to the heat transfer coefficient is analysed parametrically with a CFD solver implemented in OpenFOAM®. The parameters investigated here are the Reynolds, Hartmann and Grashof numbers, the Grashof ratio, and the wall conductance ratio (cw).
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-09-01
2022
2022-01-25
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/360632
https://dx.doi.org/10.1016/j.fusengdes.2021.112503
url https://hdl.handle.net/2117/360632
https://dx.doi.org/10.1016/j.fusengdes.2021.112503
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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