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MEASURED EFFICIENCY OF VARIABLE-SPEED DRIVES IN HEAT PUMPS.

Author(s) : RUOHONIEMI T. J.

Summary

TWO VARIABLE-SPEED HEAT PUMPS WERE TESTED UNDER CONTROLLED SPEED AND TEMPERATURE CONDITIONS TO CHARACTERIZE SYSTEM PERFORMANCE AND COMPRESSOR, MOTOR, AND INVERTER LOSSES. ONE WAS DRIVEN BY A BRUSHLESS DIRECT CURRENT MOTOR ; THE OTHER, A THREE-PHASE ALTERNATING CURRENT INDUCTION MOTOR. EACH INVERTER CONTROL CIRCUIT WAS ANALYZED TO DETERMINE A MEANS FOR CONTROLLING THE COMPRESSOR SPEED INDEPENDENTLY WITHOUT ALTERING THE INVERTER OUTPUT WAVE FORM. HEATING AND COOLING CAPACITY AND COP WERE DETERMINED. EACH COMPRESSOR WAS DISASSEMBLED, AND THE MOTORS WERE TESTED SEPARATELY ON A DYNAMOMETER TO MEASURE MOTOR AND INVERTER EFFICIENCIES.

Details

  • Original title: MEASURED EFFICIENCY OF VARIABLE-SPEED DRIVES IN HEAT PUMPS.
  • Record ID : 1989-2445
  • Languages: English
  • Publication date: 1988
  • Source: Source: ASHRAE Trans.
    vol. 94; n. 2; 1229-1245; 11 fig.; 5 tabl.; 3 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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