Patent ID: 6415611
Filing Date: 2002-07-09
Classification: F02G,F25B,H01F,Y02B

Abstract:
A method for providing refrigeration to a heat load comprising:(A) magnetizing a bed of magnetizable material, demagnetizing the magnetized bed material, cooling working fluid by bringing the working fluid into contact with the demagnetized bed material, and cooling heat transfer medium by indirect heat exchange with the cooled working fluid; (B) warming the cooled heat transfer medium by indirect heat exchange with refrigeration fluid to produce cooled refrigeration fluid at a first temperature within the range of from 50 to 120 K; (C) providing refrigeration into the cooled refrigeration fluid to produce cold refrigeration fluid at a second temperature lower than said first temperature and within the range of from 4 to 100 K; (D) warming the cold refrigeration fluid by passing refrigeration from the cold refrigeration fluid into a heat load.