Abstract: Hydrofluorocarbon compositions which consist of more than 50 to less than 60% wt of HFO-1234yf, and of more than (40) to less than 50 wt % HFC-134a are useful as drop-in substitutes for R-404A, R-507 and R-22. The invention also concerns azeotropic hydrofluorocarbon compositions consisting equal to or more than 56.3 to equal to or less than 58.0 wt of HFO-1234yf, and equal to or more than 42.0 to equal to or less than 43.7% wt of HFC-134a.

Abstract: A composition which comprises or consists of more than 75 to less than 80 wt. % of pentafluoroethane (HFC-125); more than 17 to less than 22.7 wt. % of 1,1,1,2-tetrafluoroethane (HFC-134a); and more than 2.3 to less than 3.0 wt. % of n-butane (R600).

Abstract: Use of working fluids for energy conversion in a thermal Organic Rankine Cycle (ORC) process for combined generation of electrical and heat energy. The heat source used in the ORC process is in particular thermal water. The working fluids used in the ORC process are partially or perfluorinated hydrocarbons and/or partially or perfluorinated polyethers and/or partially or perfluorinated ketones. In some embodiments, the working fluid used is a combination of 1,1,1,3,3-pentafluorobutane and a fluorinated polyether having a molecular weight of 340 and a boiling point of 57° C. at 101.3 kPa, or a combination of 1,1,1,3,3-pentafluorobutane and at least one partially or perfluorinated ketone.

Abstract: Use of working fluids for energy conversion in a thermal Organic Rankine Cycle (ORC) process for combined generation of electrical and heat energy. The heat source used in the ORC process is in particular thermal water. The working fluids used in the ORC process are partially or perfluorinated hydrocarbons and/or partially or perfluorinated polyethers and/or partially or perfluorinated ketones. In some embodiments, the working fluid used is a combination of 1,1,1,3,3-pentafluorobutane and a fluorinated polyether having a molecular weight of 340 and a boiling point of 57° C. at 101.3 kPa, or a combination of 1,1,1,3,3-pentafluorobutane and at least one partially or perfluorinated ketone.

Abstract: A composition which comprises or consists of more than 75 to less than 80 wt. % of pentafluoroethane (HFC-125); more than 17 to less than 22.7 wt. % of 1,1,1,2-tetrafluoroethane (HFC-134a); and more than 2.3 to less than 3.0 wt. % of n-butane (R600).

Abstract: Compounds of general formula (I) CxFy—O—CF?CFW wherein x is 1, 2, 3, 4, 5 or 6, y=2x+1, and wherein W is F, CF3, C2F5, C3F7, or formula (II), CxFy—O—CX?CYZ wherein x and y have the meaning given above, X stands for H or F, Y stands for H or F and Z stands for H, F. CF3 or C2F5 with the proviso that at least one of X, Y or Z are H and that not more than 2 hydrogen atoms are contained in the compound of general formula (II), are suitable as or part of refrigerants, solvents, blowing agents, fire extinguishants, ORC liquids, heat transformer liquids, heat pipe liquids or aerosol-producing gases. Preferred co-refrigerants are CF3I, HFC-134a or one or more pentafluoropropenes.

Abstract: The invention relates to working fluids for energy conversion in a thermal ORC process for combined generation of electrical and heat energy. The heat source used is in particular thermal water. The working fluids used are partially or perfluorinated hydrocarbons and/or partially or perfluorinated polyethers and/or partially or perfluorinated ketones. In one embodiment of the invention, the working fluid used is a combination of 1,1,1,3,3-pentafluorobutane and a fluorinated polyether having a molecular weight of 340 and a boiling point of 57° C. at 101.3 kPa.

Abstract: A refrigerant mixture that is suitable as a substitute for the refrigerant 1,1,1,2-tetrafluoroethane (R134a) in which the mixture contains or is composed of halogenated hydrocarbons having a GWP100 of not more than 150 and carbon dioxide. The refrigerant mixture is suitable for use as a refrigerant in air conditioning systems, especially for automobile air conditioning systems.

Abstract: The invention relates to a method for storing liquefied zeotropic gas mixtures. To ensure a composition of the liquid phase which meets specifications, the change of the gas phase is determined by means of a differential pressure transducer by comparing the pressure with a calibration mixture. The mixture composition of the liquid phase is regulated by subsequently metering in the mixture components which have the higher partial pressure.

Abstract: The invention relates to a method for storing liquefied zeotropic gas mixtures. To ensure a composition of the liquid phase which meets specifications, the change of the gas phase is determined by means of a differential pressure transducer by comparing the pressure with a calibration mixture. The mixture composition of the liquid phase is regulated by subsequently metering in the mixture components which have the higher partial pressure.