OZONE-SAFE WORKING FLUID Russian patent published in 1997 - IPC

FIELD: as working body for refrigerating systems, (RS) and thermal pumps (TP). SUBSTANCE: ozone-safe working fluid comprises 1,1,1,2- tetrafluoroethane and hydrocarbon or either pure substances such as butane or pentane or binar mixtures of n-butane and isobutane, or n-pentane and isopentane, the working liquid containing from 5 to 80 mole%, hydrocarbon. Use of this working fluid makes it possible to increase specific pressure at unchanged energy efficiency and pressure differential in RS and TP. Use of such working body makes it possible to lower boiling temperature at excess pressure, e. g. in refrigerating systems lower than 250 K. EFFECT: improved properties of the oxone-safe working fluid. 2 dwg, 3 tbl