refrigerant compositions and use thereof in refrigeration low temperature

摘要

A process for producing low temperature refrigeration in a refrigeration system, comprendiendodicho procedure the steps of: i) condensing a refrigerant composition comprising (a) 28-32% by weight of difluoromethane (HFC-32), (b) 28- 32% by weight of pentafluoroethane (HFC-125) and (c) 38-42% by weight of tetrafluoroethane (HFC-134a); and ii) evaporating the composition in the vicinity of a body to be cooled, wherein the evaporator temperature of the refrigeration system is below 0 (32).