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Experimental analysis of a variable capacity heat pump system focusing on the compressor and inverter loss behavior.

Number: pap. n. R23, 2241

Author(s) : MADANI H., AHMADI N., CLAESSON J., et al.

Summary

Capacity control with variable speed compressors in heat pump systems is one of the techniques having a potential for efficiency improvement in heat pump systems. It is anticipated that the compressor and inverter efficiency are influenced by changes of the compressor speed. The present experimental study evaluates these losses in a variable speed heat pump system. The experimental results show that increasing the compressor speed reduces the heat pump COP up to 30%. The inverter loss increases as the compressor speed is increased, although the inverter loss as the percentage of the total compressor power decreases. Increasing the compressor speed increases the pressure ratio from 2.7 to 5.8, increasing the loss due to the pressure ratio mismatch drastically. Finally, the highest total isentropic efficiency of the compressor is obtained when the compressor frequency is close to 50 Hz.

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Pages: 8 p.

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Details

  • Original title: Experimental analysis of a variable capacity heat pump system focusing on the compressor and inverter loss behavior.
  • Record ID : 30000976
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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