STUDY OF HEAT AND ENERGY PARAMETERS OF A VAPORCOMPRESSION HEAT PUMP
Keywords:
heat pump, low temperature source, thermodynamic cycle, enthalpy, entropy, energy conversion coefficient, compressor’s compression work.Abstract
In this research work, the energy efficiency of the introduction of heat pumps into the
energy supply systems of buildings in the conditions of Karshi city was evaluated based on the
thermodynamic cycle of the heat pump operating on the basis of a low-temperature source and the
experimental research of its parameters.
During the experiments, the energy efficiency of the heat pump was determined at four
temperatures 5 oC, 10 oC, 15 oC and 20 oC of the low-temperature source. R134a freon, safe for
ozone, was used as the working fluid.
It was observed that the energy conversion coefficient of the heat pump increases with the
increase in the temperature of the low-temperature heat source. During the research, it was found
that the value of the energy conversion coefficient of the heat pump at different temperatures of the
low-temperature source changed from 2.1 to 3.5. Also, an energy conversion coefficient of 3.5 was
achieved when a heat source with a temperature of 20 oC was used.
Based on the results of the conducted experiment, it shows that the use of the heat pump in the
heat supply systems is an effective solution, as the value of the energy conversion coefficient of the
heat pump is greater than 2 at different temperatures of the low-temperature source in the conditions
of Karshi city.
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