Ivchenko D. Thermodynamic properties of the solutions of dimethyl ether in triethylene glycol (experiment, modeling methods).

The thesis is devoted to a complex experimental and calculated studies of the thermodynamic properties for the systems that simulated the properties of the refrigerant / oil solutions (ROS) such us: phase equilibria, liquid phase , surface tension, heat capacity, and enthalpy of the DME / TEG solutions; creation of methods forз predicting the surface tension of the halogenderivative refrigerants, their mixtures and ROS; calculating the pseudocritical parameters of the ROS; examination of effect of the oil admixtures on the energy efficiency of the compressor system. To perform the goals stated in the thesis, an experimental setup created earlier was applied to carry out the сomprehensive investigation of the thermodynamic properties for the refrigerant / oil solutions (ROS), including: phase equilibria, surface tension, density of DME / TEG solutions. In addition, the experimental setup was also created for experimental studies of the caloric properties for the refrigerant / oil solutions.