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Surveying different magnetocaloric materials using an active magnetic regenerative refrigerator (AMRR) for hydrogen liquefaction.

Number: 0015

Author(s) : GADO M. G., SHIRAI T., NATSUME K., UCHIDA A., NUMAZAWA T., KAMIYA K.

Summary

Hydrogen serves as a key clean energy carrier for decarbonization. Liquefied hydrogen offers high volumetric energy density for efficient storage and transport. However, its low liquefaction temperature of 20 K makes the process energy-intensive. This study investigates magnetic refrigeration as a potential method to enhance hydrogen liquefaction efficiency. Utilizing the magnetocaloric effect (MCE), magnetic refrigeration enables an efficient cooling cycle, which reduces energy consumption in the liquefaction process. Herein, granular HoAl2 particles have been proposed, given their significant specific heat and strong MCE. To boost the temperature span, an Active Magnetic Regenerative Refrigerator (AMRR) is deployed. In the present study, different magnetocaloric materials have been utilized to examine the hydrogen liquefaction efficiency in comparison to HoAl2. The cooling power and coefficient of performance are systematically evaluated using heat transfer, fluid flow, and magnetic field cycling of the numerical AMRR model. Accordingly, the hydrogen liquefaction efficiency (ηII) and hydrogen yield are evaluated, under an applied magnetic field of 5 T to quantify their impact on system-level performance. The results show a potential second-law efficiency (ηII) over 60% and cooling capacity over 100 W using HoAl2 under an operating range of 20-30 K. On the other hand, ErAl2 can achieve a ηII over 40% and cooling capacity over 40 W under the operating range of 10-20 K. Taking advantage of those materials will eventually upgrade hydrogen utilization and push boundaries toward achieving a hydrogen society. 

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  • Original title: Surveying different magnetocaloric materials using an active magnetic regenerative refrigerator (AMRR) for hydrogen liquefaction.
  • Record ID : 30035060
  • Languages: English
  • Subject: Technology
  • Source: 11th IIR Conference on Solid-State Cooling, Heating and Energy Harvesting.
  • Publication date: 2026/06/07
  • DOI: http://dx.doi.org/10.18462/iir.thermag.2026.0015

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