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Determining the optimum condenser fan speed for refrigeration systems.

Number: 1112

Author(s) : DOWLING C.

Summary

The use of variable speed drives to improve the efficiency of rotating machines, particularly at part-load conditions, is now common practice but the operation of one machine in a refrigeration plant impacts on other machines and their energy consumption. This paper proposes methodologies for the refrigeration plant’s control system to calculate the optimum speed of machines to take best advantage of variable speed control to maximise overall refrigeration plant efficiency.
The machines considered in this work are particularly compressors and fans. The characteristics of fan speed against energy consumed and airflow are considered. The impact of airflow across heat exchangers on refrigerant pressures and their corresponding impact on compressor efficiency are then calculated to determine optimum speeds for all operating conditions. A methodology for the control system of a refrigeration plant to calculate the optimum machine speeds, whilst taking account of fan, heat exchanger and compressor characteristics is proposed.

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Pages: 9

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Details

  • Original title: Determining the optimum condenser fan speed for refrigeration systems.
  • Record ID : 30027642
  • Languages: English
  • Source: IIR Rankine Conference 2020.
  • Publication date: 2020/07/31
  • DOI: http://dx.doi.org/10.18462/iir.rankine.2020.1112

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