Magnetic refrigerator for hydrogen liquefaction

摘要: This paper reviews the development status of magnetic refrigeration system for hydrogen liquefaction. There is no doubt that one most important energy sources in near future. In particular, liquid can be utilized infrastructure construction consisting storage and transportation. Liquid cryogenic temperatures therefore high efficient liquefaction method must studied. Magnetic which uses magneto-caloric effect has potential to realize not only higher efficiency > 50 %, but also environmentally friendly cost effective. Our consists Carnot cycle stage AMR (active regenerator) precooling stages. For cycle, we develop 80 % by using heat pipe. studied two kinds displacer systems, transferred working fluid. We confirmed with cooling temperature span 12 K 1.8 T field 6 second cycle. By simulation, estimate total plant 10 kg/day. A FOM 0.47 obtained operation between 20 77 including LN2 work input.