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VARIABLE CONCENTRATION MIXED-REFRIGERANT HEAT PUMP AIR CONDITIONING SYSTEM.

[In Japanese. / En japonais.]

Author(s) : OUCHI H.

Type of article: Article

Summary

THE GREATEST DISADVANTAGE OF AN AIR-SOURCE HEAT PUMP IS THAT ITS CAPACITY AND ENERGY EFFICIENCY RATIO DECREASE WITH LOW OUTDOOR TEMPERATURES, THUS LIMITING THE USE OF THESE SYSTEMS IN COLD CLIMATES. IN ORDER TO IMPROVE THE LOW HEATING CAPACITY THE AUTHORS SELECTED A NON-AZEOTROPIC BINARY REFRIGERANT MIXTURE COMPOSED OF R13B1 AND R22. HOWEVER, AT 280 K (7 DEG C), OR WHEN THE COOLING EFFICIENCY FALLS, THE PRESSURE INCREASES AND OTHER PROBLEMS APPEAR. REFRIGERANT CONCENTRATION CONTROL WAS THEREFORE DESIGNED TO OVERCOME THESE PROBLEMS. BY USING THE NEW BINARY REFRIGERANT AND THE CONCENTRATION CONTROL SYSTEM IT WAS POSSIBLE TO INCREASE THE ENERGY EFFICIENCY RATIO AND HEATING CAPACITY, AS WELL AS EXPAND THE OPERATING TEMPERATURE RANGES.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1989-1568
  • Languages: Japanese
  • Source: Refrigeration - vol. 63 - n. 732
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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