Prytula N. Thermodynamic efficiency of heat pump schemes of energy supply of buildings using the ambient heat

The dissertation is devoted to the development of theoretical models and calcu-lation methods needed to analyze the thermodynamic efficiency of heat pump installations in low-temperature water heating, ventilation and hot-water supply systems using different renewed and nonconventional power sources. Analytical dependence for defying the best depth of usage the low-temperature energy sources in the heat supply system on conditions of power consumption for the heat potential rise as well as for displacement of heat-transfer agent in the low circuit of the heat pump was determined. The influence of changes in ambient and working conditions of a heat pump on thermodynamic efficiency of heat pump heat supply schemes was analyzed. The possibilities of efficiency rise of heat supply heat pump system usage by developing combined heat pump systems comprising various low-temperature energy sources and heat consumers were determined. The optimal characteristics of horizontal ground heat exchangers for low-temperature water heating and hot-water supply heat pump systems depending on the ground heat exchanger and heat pump installation operation conditions were defined.