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Simulation of magnetic refrigeration systems with thermal diodes and axial conductive heat transfer
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0001-9592-0202
2016 (English)In: Refrigeration Science and Technology Proceedings, 2016Conference paper (Refereed)
Abstract [en]

In conventional magnetic refrigeration cycles with heat transfer fluid, the achievable cycle frequency, andtherefore, specific cooling capacity is limited. Furthermore, ineffective use of magnet in low frequencydevices makes them expensive. In this work, as an alternative technique, utilizing conductive heat transfercontrolled by two different types of thermal diodes, gas-liquid and contact-break diodes, is investigated. Forthat purpose two software models are made to simulate the performance of a magnetic refrigerator with eachof the diodes. The results of simulations are presented and comparison is made between these results andthe results of older studies which used ideal properties. According to the results, due to the limited thermalconductivity of the magnetocaloric materials, the increase in the capacity becomes small with too highfrequencies. Among the thermal diodes and materials studied, the liquid metal Galinstan as the conductingfluid in an active diode gave the best results.

Place, publisher, year, edition, pages
Keyword [en]
magnetocaloric, refrigeration, solid-state, thermal diode, heat gate, heat switch
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-192595DOI: 10.18462/iir.thermag.2016.0143ISBN: 978-2-36215-016-6OAI: diva2:971226
7th International Conference on Magnetic Refrigeration at Room Temperature

QC 20160921

Available from: 2016-09-15 Created: 2016-09-15 Last updated: 2016-09-21Bibliographically approved

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Monfared, Behzad
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Applied Thermodynamics and Refrigeration
Energy Engineering

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