Vapour pressures,densities,and viscosities of the (water + lithium bromide + potassium acetate) system and (water + lithium bromide + sodium lactate) system

摘要

Measurements of thermophysical properties (vapour pressure,density,and viscosity) of the (water + lithium bromide + potassium acetate) system LiBr:CH_3COOK = 2:1 by mass ratio and the (water + lithium bromide + sodium lactate) system LiBr:CH_3-CH(OH)COONa = 2:1 by mass ratio were measured.The system,a possible new working fluid for absorption heat pump,consists of absorbent (LiBr + CH_3COOK) or (LiBr + CH_3CH(OH)COONa) and refrigerant H_2O.The vapour pressures were measured in the ranges of temperature and absorbent concentration from T= (293.15 to 333.15) K and from mass fraction 0.20 to 0.50,densities and viscosities were measured from T= (293.15 to 323.15) K and from mass fraction 0.20 to 0.40.The experimental data were correlated with an Antoine-type equation.Densities and viscosities were measured in the same range of temperature and absorbent concentration as that of the vapour pressure.Regression equations for densities and viscosities were obtained with a minimum mean square error criterion.