(EP770112-A1)       A non-azeotropic refrigerant compsn. contains: (A) carbon dioxide and/or fluoromethane; (B) at least one cpd. from hydrofluorocarbons and hydrofluorocarbon ethers; and (C) at least one hydrocarbon. The b.pt. of (B) being at least 150 C higher than the sublimation temp. of CO2and/or the b.pt. of fluoromethane in (A). Also claimed is a cooling method involving condensing the compsn. then evaporating in heat exchange relationship with a fluid to be cooled.    USE -   Provides desired cooling in heat transfer devices such as air conditioning and low temp. refrigeration systems.    ADVANTAGE -   The compsn. contains cpds. which have low or zero ozone depletion potentials. The mixt. boils over a wide temp. range which can be used to increase the energy efficiency of the system in which it is used. This increase in energy efficiency leads to a reduction in global warming properties.    (JP10502697-W)       A non-azeotropic refrigerant compsn. contains: (A) carbon dioxide and/or fluoromethane; (B) at least one cpd. from hydrofluorocarbons and hydrofluorocarbon ethers; and (C) at least one hydrocarbon. The b.pt. of (B) being at least 150 C higher than the sublimation temp. of CO2and/or the b.pt. of fluoromethane in (A). Also claimed is a cooling method involving condensing the compsn. then evaporating in heat exchange relationship with a fluid to be cooled.    USE -   Provides desired cooling in heat transfer devices such as air conditioning and low temp. refrigeration systems.    ADVANTAGE -   The compsn. contains cpds. which have low or zero ozone depletion potentials. The mixt. boils over a wide temp. range which can be used to increase the energy efficiency of the system in which it is used. This increase in energy efficiency leads to a reduction in global warming properties.    (EP770112-B1)       A non-azeotropic refrigerant compsn. contains: (A) carbon dioxide and/or fluoromethane; (B) at least one cpd. from hydrofluorocarbons and hydrofluorocarbon ethers; and (C) at least one hydrocarbon. The b.pt. of (B) being at least 150 C higher than the sublimation temp. of CO2and/or the b.pt. of fluoromethane in (A). Also claimed is a cooling method involving condensing the compsn. then evaporating in heat exchange relationship with a fluid to be cooled.    USE -   Provides desired cooling in heat transfer devices such as air conditioning and low temp. refrigeration systems.    ADVANTAGE -   The compsn. contains cpds. which have low or zero ozone depletion potentials. The mixt. boils over a wide temp. range which can be used to increase the energy efficiency of the system in which it is used. This increase in energy efficiency leads to a reduction in global warming properties.