A full solid-state conceptual magnetocaloric refrigerator based on hybrid regeneration

Autor: Yuan Lin, Jing Wang, Wei Dai, Kaiming Qiao, Houbo Zhou, Tongyun Zhao, Fengxia Hu, Baogen Shen
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: The Innovation, Vol 5, Iss 4, Pp 100645- (2024)
Druh dokumentu: article
ISSN: 2666-6758
DOI: 10.1016/j.xinn.2024.100645
Popis: The environmental friendliness and high efficiency of magnetocaloric refrigeration make it a promising substitute for vapor compression refrigeration. However, the common use of heat transfer fluid in conventional passive magnetic regenerators (PMRs) and active magnetic regenerators (AMRs) makes only partial materials contribute to the regeneration process, which produces large regeneration loss and greatly limits the regeneration efficiency and refrigeration performance at high frequency. Herein, we propose a new conceptual hybrid magnetic regenerator (HMR) composed of multiple solid-state high thermal conductivity materials (HTCMs) and magnetocaloric materials (MCMs), in which both HTCM and MCM elements participate in the regeneration process. This novel working mode could greatly reduce regeneration losses caused by dead volume, pressure losses, and temperature nonuniformity in heat transfer substances to markedly improve regeneration efficiency at high working frequencies. Using the experimentally obtained adiabatic temperature change and magnetic work and with the help of finite element simulation, a maximum temperature of 26 K, a dramatically large cooling power of 8.3 kW/kg, and a maximum ideal exergy efficiency of 54.2% are achieved at the working frequency of 10 Hz for an ideal prototype device of a rotary HMR magnetocaloric refrigerator, which shows potential for achieving an integrative, advanced performance against current AMR/PMR systems.
Databáze: Directory of Open Access Journals
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