Possibility of Hydrogen Magnetic Refrigeration for Incoming Hydrogen Society

Abstract

This paper shows the current development status of hydrogen magnetic refrigeration, consisting of Carnot and AMR cycles. The world’s first Carnot hydrogen liquefier has been successfully constructed and tested. The magnetic material condenses gaseous hydrogen directly, enabling high thermal efficiency to be obtained. A Carnot efficiency of 54% and a condensation efficiency of 90% were attained. The simulation results for an entire hydrogen magnetic refrigeration system from 20 K to 300 K showed the high potential of magnetic refrigeration, which will allow the construction of hydrogen liquefaction plants with FOM＞0.5.