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EFFECT OF SHORT-TUBE ORIFICE SIZE ON THE PERFORMANCE OF AN AIR SOURCE HEAT PUMP DURING THE REVERSE-CYCLE DEFROST.

Author(s) : O'NEAL D. L., PETERSON K., ANAND N. K.

Type of article: Article, IJR article

Summary

MANY AIR SOURCE HEAT PUMPS USE THE REVERSE-CYCLE DEFROST TO ELIMINATE FROST. DURING THE DEFROST, THE HEAT PUMP IS SWITCHED FROM THE HEATING TO THE COOLING MODE TO PROVIDE HEAT TO THE OUTDOOR HEAT EXCHANGER TO MELT THE FROST. ONCE THE FROST IS MELTED, THE UNIT IS SWITCHED BACK TO THE HEATING MODE. THE OBJECTIVE OF THIS RESEARCH WAS TO CHARACTERIZE THE EFFECT OF SHORT-TUBE ORIFICE DIAMETER ON THE RESPONSE OF A HEAT PUMP DURING THE REVERSE-CYCLE DEFROST. AN EXPERIMENTAL APPARATUS WAS CONSTRUCTED CONTAINING A NOMINAL 3 TON (COOLING CAPACITY) RESIDENTIAL AIR SOURCE HEAT PUMP. A MANIFOLD WAS CONSTRUCTED WHICH ALLOWED FOR THE SWITCHING OF DIFFERENT SIZED ORIFICES BY TURNING A SHUT-OFF VALVE. A DETAILED COMPARISON OF THE EFFECT ON DEFROST PERFORMANCE IS PROVIDED.

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Pages: 52-57

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Details

  • Original title: EFFECT OF SHORT-TUBE ORIFICE SIZE ON THE PERFORMANCE OF AN AIR SOURCE HEAT PUMP DURING THE REVERSE-CYCLE DEFROST.
  • Record ID : 1991-1785
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 14 - n. 1
  • Publication date: 1991/01

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