Dual stage active magnetic regenerator and method

Details Dual stage active magnetic regenerator and method Dual stage active magnetic regenerator and method

1997-06-25

1999-03-30

Capossela, Ronald

Refrigeration

Using electrical or magnetic effect

62 6, 62 511, F25B 2100

Patent

active

058874496

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.

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