EFFICIENT AND ENVIRONMENTALLY CLEAN HEAT PUMP SYSTEM OF HEATING AND HOT WATER SUPPLY FOR AGRICULTURAL BUSINESSES
Abstract
Currently, the changes taking place in the agricultural production of Ukraine require the creation and development of new heat pump technologies that are used for heat supply of agricultural enterprises. This work examines the problem of using a water heat pump (HT), which works on regenerative energy sources and uses low-potential heat of water from rivers, lakes, and groundwater for heat supply to rural enterprises. The purpose of the work is to evaluate the effectiveness of the application of the vapor compression cycle of water TN at agricultural production enterprises from a thermodynamic point of view. The thermodynamic characteristics and peculiarities of operation of water-to-water TN for agricultural enterprises were analyzed and the factors affecting their energy efficiency were evaluated. The effect of water temperature on the heat productivity of such a TN is also shown and analyzed. To increase the efficiency of the heat supply system of an agricultural enterprise, a scheme of a heat pump system for the selection of low-potential heat with the use of a «water-water» heating system is proposed. The conducted studies indicated the sufficient efficiency of the use of water heaters due to water as a low-potential source and their advantage over other heat-generating equipment. Water heaters consume energy from lowpotential sources, while reducing heat supply costs by more than half. From the point of view of economy, it is advantageous to use ″water-water″ TN for the disposal of low-potential heat flows. At the current level, analyzing the thermodynamic efficiency of heat supply systems using heat pumps in agriculture, it can be concluded that in modern economic conditions it is necessary to develop heat supply systems using steam-compression water heaters, and this, in turn, significantly increases the characteristics of heat supply equipment, which is used in agricultural enterprises.
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