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Developments in refrigeration technology for spiral and blast freezers.

Author(s) : PEARSON A. B., LAMB R. A.

Summary

The transition to HFC refrigerants from CFCs and HCFCs has been accomplished relatively easily in the commercial and light industrial markets, but there has been no equivalent move in larger industrial systems, where efficiency penalties and the cost of refrigerants and lubricants have inhibited their acceptance. The paper describes two recent innovations in freezers where a large plant pumping ammonia to the evaporators is not preferred. The use of pumpless low-pressure receiver systems, gives good efficiency and reduced ammonia charge. Proven in cold stores over the last ten years, they have recently been successfully applied to freezers. For larger lower temperature systems, or where a central plant is required, carbon dioxide provides another design approach. These cascade systems have a low charge ammonia or HFC plant contained within the plant room, and carbon dioxide is pumped around the site. They can be cheaper to install and run than an ammonia plant, and give the added benefit of reduced risk to factory personnel.

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Pages: 2001-1

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Details

  • Original title: Developments in refrigeration technology for spiral and blast freezers.
  • Record ID : 2005-1271
  • Languages: English
  • Source: Rapid Cooling of Food.
  • Publication date: 2001/03/28

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