INTERACTION COEFFICIENTS FOR 15 MIXTURES OF FLAMMABLE AND NON-FLAMMABLE COMPONENTS

Bubble pressures were measured for 15 binary mixtures, each composed m ainly of one flammable and one non-flammable component. The mixtures w ere trichlorofluoromethane + isopentane, pentafluoroethane + 1,1,1-tri fluoroethane, 1,1-dichloro-2,2,2-trifluoroethane + {1,1-dichloro-1-flu oroethane or isopentane}, 1,1,1,2-tetrafluoroethane + {1,1-difluoroeth ane or propane or cyclopropane or isobutane}, difluoromethane + {penta fluoroethane or 1,1,1,2-tetrafluoroethane or 1, 1-difluoroethane}. Als o studied were mixtures of 1,1-difluoroethane + {cyclopropane or propa ne or butane or isobutane}, which compromise two flammable components, The measurements were made at approximately equimolar compositions us ing either a vapour-liquid equilibrium apparatus over a range of tempe ratures, or a static pressure measurement at 273.15K. The bubble press ures were used to determine interaction coefficients that characterize the non-ideal behaviour of these fluid mixtures. The interaction coef ficients are used in equation-of-state models for the thermodynamic pr operties of refrigerant mixtures.