Simulation of magnetic refrigeration systems with thermal diodes and axial conductive heat transfer
2016 (English)In: Refrigeration Science and Technology Proceedings, 2016Conference paper (Refereed)
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
magnetocaloric, refrigeration, solid-state, thermal diode, heat gate, heat switch
IdentifiersURN: urn:nbn:se:kth:diva-192595DOI: 10.18462/iir.thermag.2016.0143ISBN: 978-2-36215-016-6OAI: oai:DiVA.org:kth-192595DiVA: diva2:971226
7th International Conference on Magnetic Refrigeration at Room Temperature
QC 201609212016-09-152016-09-152016-09-21Bibliographically approved