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Title: Dual stage active magnetic regenerator and method

Abstract

A dual stage active magnetic regenerator refrigerator as well as method using the Joule-Brayton thermodynamic cycle includes a high temperature stage refrigerant comprising DyAl.sub.2 or (Dy.sub.1-x Er.sub.x)Al.sub.2 where x is selected to be greater than 0 and less than about 0.3 in combination with a low temperature stage comprising (Dy.sub.1-x Er.sub.x)Al.sub.2 where x is selected to be greater than about 0.5 and less than 1 to provide significantly improved refrigeration efficiency in the liquefaction of gaseous hydrogen.

Inventors:
 [1];  [2]
  1. Ames, IA
  2. (Ames, IA)
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
OSTI Identifier:
872220
Patent Number(s):
5887449
Application Number:
08/881,836
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS
F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25J - LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS {OR LIQUEFIED GASEOUS} MIXTURES BY PRESSURE AND COLD TREATMENT {OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
dual; stage; active; magnetic; regenerator; method; refrigerator; joule-brayton; thermodynamic; cycle; temperature; refrigerant; comprising; dyal; 1-x; selected; combination; provide; significantly; improved; refrigeration; efficiency; liquefaction; gaseous; hydrogen; temperature stage; significantly improved; gaseous hydrogen; active magnetic; magnetic regenerator; provide significantly; thermodynamic cycle; stage active; significantly improve; dual stage; joule-brayton thermodynamic; /62/

Citation Formats

Pecharsky, Vitalij K, and Gschneidner, Jr., Karl A. Dual stage active magnetic regenerator and method. United States: N. p., 1999. Web.
Pecharsky, Vitalij K, & Gschneidner, Jr., Karl A. Dual stage active magnetic regenerator and method. United States.
Pecharsky, Vitalij K, and Gschneidner, Jr., Karl A. Fri . "Dual stage active magnetic regenerator and method". United States. https://www.osti.gov/servlets/purl/872220.
@article{osti_872220,
title = {Dual stage active magnetic regenerator and method},
author = {Pecharsky, Vitalij K and Gschneidner, Jr., Karl A.},
abstractNote = {A dual stage active magnetic regenerator refrigerator as well as method using the Joule-Brayton thermodynamic cycle includes a high temperature stage refrigerant comprising DyAl.sub.2 or (Dy.sub.1-x Er.sub.x)Al.sub.2 where x is selected to be greater than 0 and less than about 0.3 in combination with a low temperature stage comprising (Dy.sub.1-x Er.sub.x)Al.sub.2 where x is selected to be greater than about 0.5 and less than 1 to provide significantly improved refrigeration efficiency in the liquefaction of gaseous hydrogen.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Works referenced in this record:

New type of magnetocaloric effect: Implications on low‚Äźtemperature magnetic refrigeration using an Ericsson cycle
journal, May 1994


Heat capacity in superconducting and normal-state La S x ( 1.333 <~ x <~ 1.500 ) compounds
journal, April 1982


An Ericsson Magnetic Refrigerator for Low Temperature
book, January 1988


New application of complex magnetic materials to the magnetic refrigerant in an Ericsson magnetic refrigerator
journal, November 1987


Influence of Crystal Field Interaction on the Thermal Behavior of ErAl2
book, January 1977


Magnetic properties of (rare earth)Al 2 intermetallic compounds
journal, August 1990


Low temperature heat capacities of laves phase lanthanide-aluminum compounds
journal, January 1971


Investigation of the Magnetic Refrigerant for the Ericsson Magnetic Refrigerator
journal, January 1987