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Performance analysis of an R410A air-to-water heat pump for different fan and compressor speed combinations.

Number: 2172

Author(s) : ORTEGA A., SIERES J., CERDEIRA F., SANTOS J. M., ALVAREZ E.

Summary

In this paper, the performance of an air-to-water heat pump with R410A is studied. The unit works following a flash tank vapor injection cycle (using a vapor-injected compressor). It also includes a four-way reversing valve, electronic expansion valves, a plate heat exchanger as the indoor heat exchanger, and a coil with wavy fins as the outdoor heat exchanger. In the residential heat pump sector energy efficiency policies have boosted the development of efficient units that include variable speed compressor or electronic expansion valves (EEV) as some of their technological improvements. Though the fan power consumption may not be relevant at the nominal conditions (high compressor speeds), it may turn to be significant at partial load. Then, in order to obtain high SCOP/SEER values, the unit’s fan speed should be controlled properly. Experimental results for typical operating conditions of air-to-water heat pumps (EN 14511-2, 2018) in the cooling mode of operation are presented and discussed for different fan and compressor speed combinations. From the experimental measurements, parameters such as the EER, the cooling power or the compressor and fan electric power consumptions are obtained and analyzed. Results show that an optimum fan speed that maximizes the EES of the unit can be found for different compressor speed values. The optimum fan speed decreases when the compressor speed decreases. For the range of conditions tested in this work, the effect of the fan speed control on the EER can represent an improvement of up to 6%.

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  • Original title: Performance analysis of an R410A air-to-water heat pump for different fan and compressor speed combinations.
  • Record ID : 30030505
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022/07/10

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