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REDUCING ENERGY COSTS IN VAPOUR-COMPRESSION REFRIGERATION AND AIR CONDITIONING USING LIQUID RECYCLE. 2. PERFORMANCE.

Author(s) : HOLTZAPPLE M. T.

Summary

AMMONIA HAS THE ADVANTAGE THAT IT REQUIRES LESS HIGH-PRESSURE HEAT EXCHANGE AREA THAN R12, BUT IT HAS A VERY HIGH SUPERHEAT, WHICH MAY LEAD TO MATERIALS OR LUBRICATION PROBLEMS. THESE PROBLEMS MAY BE SOLVED BY RECYCLING LIQUID AMMONIA. TWO METHODS OF RECYCLING LIQUID TO A SINGLE-STAGE VAPOUR-COMPRESSION REFRIGERATION SYSTEM ARE EXPLORED. THE FIRST RECYCLES CONDENSER LIQUID TO THE COMPRESSOR OUTLET. THIS REMOVES SUPERHEAT BY DIRECT LIQUID EVAPORATION. THE SIZE OF THE HIGH-PRESSURE HEAT EXCHANGER MAY BE REDUCED OR ENERGY EFFICIENCY MAY BE IMPROVED. THE SECOND METHOD RECYCLES CONDENSER LIQUID DIRECTLY INTO THE COMPRESSOR TO COOL THE GASES DURING THE COMPRESSION STROKE. THIS IMPROVES THE ENERGY EFFICIENCY BY 10 TO 15%.

Details

  • Original title: REDUCING ENERGY COSTS IN VAPOUR-COMPRESSION REFRIGERATION AND AIR CONDITIONING USING LIQUID RECYCLE. 2. PERFORMANCE.
  • Record ID : 1990-1015
  • Languages: English
  • Publication date: 1989
  • Source: Source: ASHRAE Trans.
    vol. 95; n. 1; 187-198; 21 fig.; 1 tabl.; 10 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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