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Modelling of scroll compressors used in domestic heat pumps.

Author(s) : DUPREZ M. E., DUMONT E., FRERE M.

Summary

This paper presents a simple and thermodynamically realistic model of scroll compressors used in domestic heat pumps. It calculates the mass flow rate of refrigerant and the power consumption from the knowledge of operating conditions and parameters. Some of these parameters may be found in the technical datasheets of compressors whereas others are determined in such a way that the calculated mass flow rate and electrical power match those given in these datasheets. The authors' model has been tested on several compressors and they have limited their study to those with a maximum electrical power of 10 kW and for the following operating conditions: evaporating temperatures ranging from -20 to 15°C and condensing temperatures ranging from 15 to 60°C. The average discrepancies on mass flow rate and power were 1.89 and 0.76% (R-134a), 2.76 and 1.12% (R-404A), 2.39 and 0.91% (R-407C), 2.59 and 1.31% (R-22). As the authors have instrumented several heat pumps with different sensors (temperature, pressure, mass flow rate and power), they have validated their model by simulating experimental points of one of those heat pumps using the parameters which were previously determined. Errors on the mass flow rate between simulation and measurement values are lower than 6% while errors on the power are lower than 8%.

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Pages: 2006-5

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Details

  • Original title: Modelling of scroll compressors used in domestic heat pumps.
  • Record ID : 2007-0156
  • Languages: English
  • Source: Compressors 2006: 6th International Conference on Compressors and Coolants
  • Publication date: 2006/09/27

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