Patent ID: 6494054
Filing Date: 2002-12-17
Classification: C09K,F25B,F25J

Abstract:
A method for providing refrigeration comprising:(A) compressing an ammonia refrigerant fluid, expanding the compressed ammonia refrigerant fluid, and warming the expanded ammonia refrigerant fluid; (B) compressing a multicomponent refrigerant fluid, and cooling the compressed multicomponent refrigerant fluid in part by indirect heat exchange with the warming ammonia refrigerant fluid to produce cooled compressed multicomponent refrigerant fluid; (C) expanding the cooled compressed multicomponent refrigerant fluid to produce refrigeration bearing multicomponent refrigerant fluid, and warming the refrigeration bearing multicomponent refrigerant fluid to provide refrigeration to a heat load; and (D) further warming the refrigeration bearing multicomponent refrigerant fluid to provide additional cooling to the compressed multicomponent refrigerant fluid.