Magnetic refrigerator for hydrogen liquefaction

被引：44

作者：

Matsumoto, K. ^{[1
]}

Kondo, T. ^{[1
]}

Yoshioka, S. ^{[2
]}

Kamiya, K. ^{[2
]}

Numazawa, T. ^{[2
]}

机构：

[1] Kanazawa Univ, Dept Phys, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan

[2] Natl Inst Mat Sci, Tsukuba Magnet Lab, Tsukuba, Ibaraki 3050003, Japan

来源：

25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 1: CRYOGENIC TECHNOLOGIES AND APPLICATIONS | 2009年 / 150卷

关键词：

D O I：

10.1088/1742-6596/150/1/012028

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Magnetic refrigeration which is based on the magnetocaloric effect of solids has the potential to achieve high thermal efficiency for hydrogen liquefaction. We have been developing a magnetic refrigerator for hydrogen liquefaction which cools down hydrogen gas from liquid natural gas temperature and liquefies at 20 K. The magnetic liquefaction system consists of two magnetic refrigerators: Carnot magnetic refrigerator (CMR) and active magnetic regenerator (AMR) device. CMR with Carnot cycle succeeded in liquefying hydrogen at 20K. Above liquefaction temperature, a regenerative refrigeration cycle should be necessary to precool hydrogen gas, because adiabatic temperature change of magnetic material is reduced due to a large lattice specific heat of magnetic materials. We have tested an AMR device as the precooling stage. It was confirmed for the first time that AMR cycle worked around 20 K.

引用

页数：4

共 7 条

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