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Thermodynamic performance of reciprocating and rolling piston compressors for heat pump application.

Number: pap. n. 6

Author(s) : BEZERRA J. G. Jr, DESCHAMPS C. J., SILVA E., et al.

Summary

The present paper reports a comparative thermodynamic analysis of reciprocating and rolling piston compressors for a 1.4 kW heat pump application. R134a was adopted as the working fluid and the evaporating and condensing temperatures were set to 10°C and 55°C. The main objective was to identify the advantages and disadvantages of each compressor based on estimates of volumetric and isentropic efficiencies. Integral formulations of the conservation equations of mass and energy were used to describe the compression processes of both compressors, including the effects of leakage and gas superheating. In order to guarantee a meaningful analysis, each compressor was optimized for the specified operating condition. The study revealed that the rolling piston compressor performs better than the reciprocating compressor. The major inefficiencies of the reciprocating compressor were found to be associated with the clearance volume and with the suction and discharge processes. Gas superheating and backflow in the suction orifice were identified as critical thermodynamic irreversibilities of the rolling piston compressor.

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Pages: 8 p.

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Details

  • Original title: Thermodynamic performance of reciprocating and rolling piston compressors for heat pump application.
  • Record ID : 30008716
  • Languages: English
  • Source: Compressors 2013: 8th International Conference on Compressors and Coolants.
  • Publication date: 2013/09/02

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