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Energy efficiency of heat pump heat supply system with heat utilization of technogenic air emissions

Bezrodny Mikhail K., Prytula Natalia, Zarubin Aleksander

Journal of New Technologies in Environmental Science

2021

Vol. 5, nr 1

23--33

In this article, the aim is to analyze the conditions of efficient use of heat obtained from the utilization of technogenic air sources, and to find the optimal values of the heat usage parameters in the heat pump heating system. This will allow using the thermal potential, which was previously wasted. It is necessary to determine the optimal degree of cooling of the lower heat source in the evaporator of the heat pump (optimal depth of use of the lower energy source), because with decreasing coolant temperature at the evaporator outlet and increasing the useful effect - proportionally increases the cost of HP compressor.

Efficiency of heat pump systems of air conditioning for removing excessive moisture

Bezrodny Mikhail, Prytula Natalia, Tsvietkova Maria

Archives of Thermodynamics

2019

Vol. 40, no 2

151--165

The conditions of efficient use of heat pumps in air conditioning systems are considered in order to ensure the established temperature and relative humidity of air in premises with the removal of excess moisture in the warm or hot periods of the year. For this purpose, a thermodynamic analysis of heat pump air conditioning schemes with exhaust air recirculation through a condenser and through a heat pump evaporator has been carried out. To determine the potential capabilities of such schemes to maintain comfortable conditions in the production room, a numerical analysis of their operating parameters, depending on the temperature and relative humidity of external atmospheric air, was performed. It has been shown that recirculation of exhaust air through the heat pump evaporator allows to maintain the given conditions in the room in a wider range of parameters of external atmospheric air. In addition, it has been shown that such a scheme requires less specific energy consumption for the operation of heat pump, which means that it is more efficient.