Exergetic analysis of heat pump units for various climate conditions
Abstract The article deals with exergetic analysis of a heat pump for climate of Russian North-West. The dependencies between the parts of the pump and its general characteristic are shown. The influence of ambient temperature, condensation temperature, and low-grade heat source on the working effic...
| Published in: | IOP Conference Series: Materials Science and Engineering |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
IOP Publishing
2019
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1088/1757-899x/656/1/012036 https://iopscience.iop.org/article/10.1088/1757-899X/656/1/012036/pdf https://iopscience.iop.org/article/10.1088/1757-899X/656/1/012036 |
| Summary: | Abstract The article deals with exergetic analysis of a heat pump for climate of Russian North-West. The dependencies between the parts of the pump and its general characteristic are shown. The influence of ambient temperature, condensation temperature, and low-grade heat source on the working efficiency of heat pump units is analyzed. The changes in thermodynamic characteristics of the heat pump at ambient temperature decreasing form 0°C to –15°C are identified. The coefficient of performance is seen to decrease two times, the coefficient of transformation – by 1.4 times; overall exergetic coefficient of performance increases by 18 %. Working efficiency and coefficient of performance of the unit in general, and the ones of compressor, compensator, evaporator and thermal expansion valve are determined. The results of the research are of use for increasing efficiency of heat pumps. |
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