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

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

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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 (Δ푆) 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.
Original languageEnglish
Title of host publicationProceedings of the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)
Publication date2016
Article numberPAP-433
Publication statusPublished - 2016
Event29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems - Hotel St. Bernardin, Portorož, Slovenia
Duration: 19 Jun 201623 Aug 2016
Conference number: 29
http://www.ecos2016.si/

Conference

Conference29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems
Number29
LocationHotel St. Bernardin
CountrySlovenia
CityPortorož
Period19/06/201623/08/2016
Internet address

Bibliographical note

Presentation section: Refrigeration & air conditioning; Heat pumps

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