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CFD simulations of a supersonic ejector for use in refrigeration applications

Author(s) : SCOTT D., AIDOUN Z., BELLACHE O., et al.

Summary

Supersonic ejectors have been used in cooling/refrigeration applications since the early 1900s. Interest in supersonic ejectors has been rekindled by recent efforts to reduce energy consumption; ejector refrigeration systems can be powered by solar energy or by waste heat generated by another process. This paper presents the results of computational fluid dynamics (CFD) simulations of a supersonic ejector for use in a refrigeration system. The proposed model was applied to a geometry corresponding to an experimental apparatus that operates using R245fa. The impact of varying operating conditions (generator and evaporator pressures) on the ejector entrainment ratio and critical condenser pressures was investigated. Other parameters considered in this study include: the primary nozzle exit position; the length of the mixing chamber; and the diameter of the secondary flow inlet. The results show that CFD is a useful tool in the design of ejectors for refrigeration applications.

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Details

  • Original title: CFD simulations of a supersonic ejector for use in refrigeration applications
  • Record ID : 2010-1881
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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