Densities and viscosities of the binary mixtures of interest for absorption refrigeration systems and heat pumps

Densities and kinematic viscosities were measured over the entire range of composition and at atmospheric pressure for methanol-tetraethylene glycol dimethyl ether and methanol-polyethylene glycol 250 dimethyl ether from 283.15 to 323.15 K at five isotherms. These properties were fitted by empirical equations stating their dependence on temperature and composition of the mixture. The kinematic viscosity was correlated by the methods of McAllister, Stephan and Heckenberger, Soliman and Marshall correlations.