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A prognosis of ejector cooling.

Author(s) : DENNIS M.

Summary

Ejectors are thermally driven compressors. They have been in use for over 100 years usually as vacuum pumps driven by low pressure steam in industrial applications. More recently, ejectors have been considered for heat driven cooling systems whereby the electrically driven compressor is replaced by a heat driven ejector. In such applications, fluorocarbon refrigerants have replaced steam as the working fluid and solar heat or cogeneration waste heat has replaced thermal boilers as the motive energy. This has led to performance gains with accompanying system integration difficulties. Ejectors are commonly dismissed as having poor thermal performance and even worse performance away from the design condensing condition, since their strength is with steady state conditions. However, recent research has developed means to overcome these problems and the ejector's extreme simplicity, ability to operate on a variety of refrigerants, low cost, low emissions and reliability are compelling advantages. This paper summarises the current international research effort in ejector cooling and provides an insight into likely progress towards commercial ejector cooling product. Included is an explanation of the ejector principle, its performance characteristics and a review of refrigerant options for ejector cooling.

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Pages: 2010-2

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Details

  • Original title: A prognosis of ejector cooling.
  • Record ID : 2010-1148
  • Languages: English
  • Subject: Technology
  • Source: 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
  • Publication date: 2010/04/12

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