Performance Analysis of Reciprocating Magnetic Liquefiers


One of the goals of the study of magnetic refrigeration is to find an alternative method of refrigeration capable of fulfilling cooling needs more efficiently than conventional refrigeration systems. To achieve this, it is necessary to produce component data, design and build test devices, and analyze the concepts. Published research has mostly covered three areas: (1) development of high performance magnetic working materials; (2) experimental studies of magnetic liquefaction and refrigeration; and (3) theoretical studies of magnetic systems. A calculation of efficiency for a general magnetic cycle indicated that magnetic refrigeration can potentially have an efficiency better than that of comparable gas refrigerators. Other studies indicated that high reliability can be obtained by magnetic refrigerators in the foreseeable future. This paper presents simplified models capable of predicting the performance limits of reciprocating magnetic liquefiers. Analyses of specific prototypes are carried out by taking into account the multiple mechanisms which affect the performance. The computer models developed in the course of the analysis are primarily used for preliminary screening of magnetic refrigerators and how they can be used in hydrogen liquefaction systems. © 1994.


Mechanical and Aerospace Engineering

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Article - Journal

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Publication Date

01 Jan 1994