Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration

Tian Lei, Kurt Engelbrecht, Kaspar Kirstein Nielsen, Henrique Neves Bez, Christian Veje, Christian Bahl

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

Resumé

Magnetic refrigerators can theoretically be more efficient than current vapor compression systems and use no vapor refrigerants with global warming potential. The core component, the active magnetic regenerator (AMR) operates based on the magnetocaloric effect of magnetic materials and the heat regeneration processes of periodic fluid blows. Magnetocaloric materials with a first order phase transition (FOPT) are suitable to realize a higher cooling capacity than commonly used gadolinium, but layering such materials is necessary, due to a large isothermal entropy change (Δ푆푚) in a narrow region around their Curie temperature. Simulations are implemented to investigate how to layer the FOPT materials for obtaining higher cooling capacity. Moreover, based on entropy generation minimization, optimization of the regenerator geometry and related operating parameters is presented for improving the AMR efficiency. In addition, simulations are carried out to investigate the potential of applying nanofluid in future magnetic refrigerators.
OriginalsprogEngelsk
TitelProceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems
RedaktørerAndrej Kitanovski, Alojz Poredoš
ForlagUniversity of Ljubljana
Publikationsdato2016
ISBN (Elektronisk)978-961-6980-15-9
StatusUdgivet - 2016
Begivenhed 29th International Conference on Efficiency, Cost, Optimization, Simulation and Envionmental Impact of Energy Systems - Portorož, Slovenien
Varighed: 19. jun. 201623. jun. 2016
Konferencens nummer: 29

Konference

Konference 29th International Conference on Efficiency, Cost, Optimization, Simulation and Envionmental Impact of Energy Systems
Nummer29
LandSlovenien
ByPortorož
Periode19/06/201623/06/2016

Citer dette

Lei, T., Engelbrecht, K., Nielsen, K. K., Bez, H. N., Veje, C., & Bahl, C. (2016). Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration. I A. Kitanovski, & A. Poredoš (red.), Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems University of Ljubljana.
Lei, Tian ; Engelbrecht, Kurt ; Nielsen, Kaspar Kirstein ; Bez, Henrique Neves ; Veje, Christian ; Bahl, Christian. / Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration. Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems. red. / Andrej Kitanovski ; Alojz Poredoš. University of Ljubljana, 2016.
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title = "Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration",
abstract = "Magnetic refrigerators can theoretically be more efficient than current vapor compression systems and use no vapor refrigerants with global warming potential. The core component, the active magnetic regenerator (AMR) operates based on the magnetocaloric effect of magnetic materials and the heat regeneration processes of periodic fluid blows. Magnetocaloric materials with a first order phase transition (FOPT) are suitable to realize a higher cooling capacity than commonly used gadolinium, but layering such materials is necessary, due to a large isothermal entropy change (Δ푆푚) in a narrow region around their Curie temperature. Simulations are implemented to investigate how to layer the FOPT materials for obtaining higher cooling capacity. Moreover, based on entropy generation minimization, optimization of the regenerator geometry and related operating parameters is presented for improving the AMR efficiency. In addition, simulations are carried out to investigate the potential of applying nanofluid in future magnetic refrigerators.",
author = "Tian Lei and Kurt Engelbrecht and Nielsen, {Kaspar Kirstein} and Bez, {Henrique Neves} and Christian Veje and Christian Bahl",
year = "2016",
language = "English",
editor = "Andrej Kitanovski and Alojz Poredoš",
booktitle = "Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems",
publisher = "University of Ljubljana",

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Lei, T, Engelbrecht, K, Nielsen, KK, Bez, HN, Veje, C & Bahl, C 2016, Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration. i A Kitanovski & A Poredoš (red), Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems. University of Ljubljana, 29th International Conference on Efficiency, Cost, Optimization, Simulation and Envionmental Impact of Energy Systems, Portorož, Slovenien, 19/06/2016.

Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration. / Lei, Tian; Engelbrecht, Kurt ; Nielsen, Kaspar Kirstein; Bez, Henrique Neves; Veje, Christian ; Bahl, Christian.

Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems. red. / Andrej Kitanovski; Alojz Poredoš. University of Ljubljana, 2016.

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

TY - GEN

T1 - Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration

AU - Lei, Tian

AU - Engelbrecht, Kurt

AU - Nielsen, Kaspar Kirstein

AU - Bez, Henrique Neves

AU - Veje, Christian

AU - Bahl, Christian

PY - 2016

Y1 - 2016

N2 - Magnetic refrigerators can theoretically be more efficient than current vapor compression systems and use no vapor refrigerants with global warming potential. The core component, the active magnetic regenerator (AMR) operates based on the magnetocaloric effect of magnetic materials and the heat regeneration processes of periodic fluid blows. Magnetocaloric materials with a first order phase transition (FOPT) are suitable to realize a higher cooling capacity than commonly used gadolinium, but layering such materials is necessary, due to a large isothermal entropy change (Δ푆푚) in a narrow region around their Curie temperature. Simulations are implemented to investigate how to layer the FOPT materials for obtaining higher cooling capacity. Moreover, based on entropy generation minimization, optimization of the regenerator geometry and related operating parameters is presented for improving the AMR efficiency. In addition, simulations are carried out to investigate the potential of applying nanofluid in future magnetic refrigerators.

AB - Magnetic refrigerators can theoretically be more efficient than current vapor compression systems and use no vapor refrigerants with global warming potential. The core component, the active magnetic regenerator (AMR) operates based on the magnetocaloric effect of magnetic materials and the heat regeneration processes of periodic fluid blows. Magnetocaloric materials with a first order phase transition (FOPT) are suitable to realize a higher cooling capacity than commonly used gadolinium, but layering such materials is necessary, due to a large isothermal entropy change (Δ푆푚) in a narrow region around their Curie temperature. Simulations are implemented to investigate how to layer the FOPT materials for obtaining higher cooling capacity. Moreover, based on entropy generation minimization, optimization of the regenerator geometry and related operating parameters is presented for improving the AMR efficiency. In addition, simulations are carried out to investigate the potential of applying nanofluid in future magnetic refrigerators.

M3 - Article in proceedings

BT - Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems

A2 - Kitanovski, Andrej

A2 - Poredoš, Alojz

PB - University of Ljubljana

ER -

Lei T, Engelbrecht K, Nielsen KK, Bez HN, Veje C, Bahl C. Optimization of Multi-layer Active Magnetic Regenerator towards Compact and Efficient Refrigeration. I Kitanovski A, Poredoš A, red., Proceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems. University of Ljubljana. 2016