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A steam compression refrigeration system with an air-driven ejector.

Author(s) : ENDO N., MAEDA T., HASEGAWA Y., et al.

Summary

A steam compression refrigeration system with an ejector was theoretically investigated. In the ejector, air was used as the motive flow and steam as the suction flow, because water vapour pressure was not sufficient at the condensation temperature. The ejector was assumed to operate in the ideal state. The evaporation pressure was set at 15°C and the ambient temperature at 30°C. As a compressor, a liquid ring compressor (LRC) was assumed. The results showed that the ejector can produce refrigeration even if the evaporation pressure is below the working pressure region of the compressor. The maximum COP was about 0.2 when liquid at low vapour pressure was supplied and about 0.13 when 35°C water was supplied to LRC. The two-stage ejector cycle was effective when the LRC was cooled with 35 °C water. The COPs were small and impractical. The reason for the low COPs is thought to be the large mechanical loss of the compressor. In order to increase COP, other methods for supplying the drive flow for the ejector will be required.

Details

  • Original title: A steam compression refrigeration system with an air-driven ejector.
  • Record ID : 2006-2380
  • Languages: English
  • Source: Green breeze from Asia: frontiers of refrigerants, heat transfer and system.. ACRA-2002. Proceedings of the Asian conference on refrigeration and air conditioning.
  • Publication date: 2002/12/04

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