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Why secondary-coolant systems for supermarket refrigeration?

Author(s) : KAZACHKI G. S., HINDE D. K.

Summary

The recent developments in supermarket refrigeration systems reflect the factors shaping the supermarket industry: severe competition, small profit margin, high energy cost, high refrigerant price, regulatory pressures, and public perception/image. The secondary-coolant technology has evolved in the last decade as the most reliable solution to these factors mainly through refrigerant charge reduction, refrigerant leak elimination, maintenance simplification, and product quality improvement. New advanced designs and operational features are applied for energy parity with the traditional centralized direct-expansion system. These features include: lower floating condensing pressure, deeper liquid subcooling, lower vapour superheat and pressure drop in the refrigerant return lines, simpler oil management, and reduced or eliminated oil accumulation in the heat exchangers/coils. Additional benefits of the secondary-coolant systems are improved product quality and reduced shrink in fresh foods, the opportunities to use more efficient and environmentally-friendly refrigerants, and to reduce the demand and dependence on qualified technicians during installation and operation.

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Details

  • Original title: Why secondary-coolant systems for supermarket refrigeration?
  • Record ID : 2007-1635
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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