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Ammonia in small and medium sized heat pumps.

Author(s) : NESJE O.

Summary

The use of ammonia in small systems requires a proportionately high expenditure on controls. Development is concentrated on minimising the refrigerant charge by using concentric or plate heat exchangers. The evaporator surface can be kept wetted using a pulsed liquid feed and a low-pressure receiver with liquid sub-cooler. To reduce the risk of ammonia leakage, a canned rotor or fully hermetic compressor should be used, and further development is required, since available models are designed for halocarbons. An indirect ammonia cooling system is comparable in cost and efficiency with direct expansion R134a. A.R.T

Details

  • Original title: Ammonia in small and medium sized heat pumps.
  • Record ID : 1994-2516
  • Languages: English
  • Source: Heat Pumps for Energy Efficiency and Environmental Progress: Proceedings of the 4th International Energy Agency Heat Pump Conference.
  • Publication date: 1993/04/26
  • Document available for consultation in the library of the IIR headquarters only.

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