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Experimental investigation of the characteristics of a jet-ejector and a jet-ejector cooling system operating with R134a as a refrigerant.

Author(s) : ZEGENHAGEN M. T., ZIEGLER F.

Type of article: Article, IJR article

Summary

Due to their simplicity, jet-ejector cooling systems have been investigated for different applications despite their lower thermal COPth in comparison to alternative thermally-driven cooling technologies. The present paper aims at the derivation of a simple method of representation of the operation characteristics of a jet-ejector cooling system for changing boundary conditions. Thereto, a jet-ejector cooling system operating with the refrigerant R134a has been experimentally investigated in double choking operation of the jet-ejector. The jet-ejector operation is characterized by the entrainment ratio µ in dependence of the adequate stagnation pressure ratios. The results are discussed in a non-dimensional graph as a three dimensional surface from which characteristic lines may be deduced. In several graphs, the motive, condenser and evaporator pressures are linked with the entrainment ratio µ , the cooling capacity View the MathML sourceQ?0, the thermal COPth and the hydraulic COPh allowing a comprehensive determination of the system operation.

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Pages: 173-185

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Details

  • Original title: Experimental investigation of the characteristics of a jet-ejector and a jet-ejector cooling system operating with R134a as a refrigerant.
  • Record ID : 30014833
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 56
  • Publication date: 2015/08

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