Abstract
Recent published work in the area of magnetic refrigeration reports on its potential for greater efficiency and high reliability. This paper presents an exergy analysis of a three-stage active magnetic regenerative (AMR) hydrogen liquefier which cools a hydrogen gas stream at 77 K and 1 atm to hydrogen liquid at 20 K. Ortho - para conversion of hydrogen is accomplished in a heat exchanger employing a 10 atm helium fluid that cycles in the refrigerator. The performance of the system is described in terms of the cooling capacity and exergy losses as functions of the magnetic material type, magnetic bed size and temperature, helium mass flow rate, ratio of Iso field and adiabatic process times, and the operating frequency. © 1993.
Recommended Citation
L. Zhang et al., "Second Law Analysis Of Active Magnetic Regenerative Hydrogen Liquefiers," Cryogenics, vol. 33, no. 7, pp. 667 - 674, Elsevier, Jan 1993.
The definitive version is available at https://doi.org/10.1016/0011-2275(93)90017-I
Department(s)
Mechanical and Aerospace Engineering
Keywords and Phrases
hydrogen; liquefiers; magnetic refrigeration
International Standard Serial Number (ISSN)
0011-2275
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Elsevier, All rights reserved.
Publication Date
01 Jan 1993
Comments
University of Miami, Grant None