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Thermodynamic analysis of a conical screw spindle compressor for R718.

Number: 0325

Author(s) : MOESCH T. W., PLESKUN H., KLOTSCHE K., THOMAS C., HESSE U.

Summary

Due to its thermodynamic properties, water as a refrigerant (R718) may be applied very efficiently for chiller and heat pump applications with temperature lifts ΔT > 40 K. However, R718 also requires compressors with high flow rates and high pressure ratios. Previous studies indicate that screw spindle compressors, currently used in vacuum pumps, are a promising compressor technology for R718. The authors previously presented a first optimization of a conical screw spindle compressor geometry for a chiller application. The optimized rotor design theoretically allows high volume flows (up to 10,400 m3/h) and high temperature lifts (up to ΔT = 60 K) for chiller applications with evaporating temperatures of 5 °C. This paper focuses on the thermodynamic analysis of the conical screw spindle compressor. The analysis includes the resulting internal leakages and effects of liquid injection. The results indicate a high volumetric and isentropic efficiency for the design operating conditions.

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Pages: 12 p.

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Details

  • Original title: Thermodynamic analysis of a conical screw spindle compressor for R718.
  • Record ID : 30031754
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0325

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