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Energy savings by replacing a large capacity fixed speed compressor with a lower capacity VSD compressor for low load optimisation in refrigerated distribution.

Number: 1134

Author(s) : MILLER N., MCDOUGALD D.

Summary

With global warming predicted to reach dangerous levels, action must be taken to increase the efficiency of new design and operational refrigeration plants. Many existing plants have been designed for higher cooling densities than they require and as such are running at part load. Running fixed speed compressors at partload is known to be inefficient.
This paper is a case study of a refrigerated distribution centre that sees one of the 2.2MW duty screwcompressors running at reduced capacity for long periods of time during lower ambient temperature conditions. To improve plant efficiency during these part-load conditions, one of the 2.2MW fixed speed compressors was swapped out with a reduced capacity VSD driven compressor. This paper assesses the plant’s historical energy usage data and uses compressor selection software to predict the energy savings of this retrofit.

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Pages: 12 p.

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Details

  • Original title: Energy savings by replacing a large capacity fixed speed compressor with a lower capacity VSD compressor for low load optimisation in refrigerated distribution.
  • Record ID : 30034183
  • Languages: English
  • Subject: Technology
  • Source: 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Publication date: 2025/08
  • DOI: http://dx.doi.org/10.18462/iir.adaptation.2024.1134

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