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Ejector design and theoretical study of R134a ejector refrigeration cycle.

Author(s) : KHALIL A., FATOUH M., ELGENDY E.

Type of article: Article, IJR article

Summary

In this paper, a mathematical model is developed to design R134a ejector and to predict the performance characteristics of a vapor jet refrigeration system over a wide range of the investigated parameters. These parameters include boiling temperature (65-85°C), condensing temperature (25-40°C), evaporating temperature (0-10°C), degrees of superheat (0-15°C), nozzle efficiency (0.75-0.95) and diffuser efficiency (0.75-0.95). Simulated results showed that the present model data are in good agreement with experimental data in the literature with an average error of 6%. It is found that the ejector area ratio at boiling temperature of 85°C is about double that at boiling temperature of 65°C for various evaporating and condensing temperatures. The present results confirm that waste heat sources of temperature ranging from 65 to 85 °C are adequate to operate vapor jet refrigeration system for air-conditioning applications.

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Pages: 1684-1698

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Details

  • Original title: Ejector design and theoretical study of R134a ejector refrigeration cycle.
  • Record ID : 30001681
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 7
  • Publication date: 2011/11

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