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PERFORMANCE TEST OF A DIRECT EXPANSION HEAT PUMP SYSTEM.

Author(s) : EDWARDS J. A.

Summary

RESULTS ARE GIVEN FOR A DIRECT EXPANSION HEAT PUMP SYSTEM THAT IS UNIQUELY COUPLED TO THE EARTH THROUGH A HEAT TRANSFER CONCENTRATOR. THE SYSTEM REDUCES SEVERAL OF THE THERMAL RESISTANCES ASSOCIATED WITH THE HEAT FLOW PATHS IN OTHER TYPES OF GROUND-COUPLED HEAT PUMP SYSTEMS. PERFORMANCE RESULTS FOR THIS SYSTEM ARE GIVEN FOR BOTH COOLING AND HEATING OPERATION BASED ON A ONE-YEAR TEST PERIOD. THE RESULTS ARE COMPARED TO EXPERIMENTAL DATA OBTAINED FROM OTHER TYPES OF EARTH COUPLED CONFIGURATIONS (HORIZONTAL PIPE, PEBBLE BED, SURFACE TANK, AND A CLOSED-LOOP VERTICAL WELL) AND AN AIR-SOURCE HEAT PUMP TESTED AT A RESEARCH LABORATORY. THE HEATING SEASON COP WAS 4.2 AND THE COOLING SEASON COP WAS 3.1. WHEN COMPARED TO THE OTHER HEAT PUMPS TESTED, THIS REPRESENTS AN IMPROVEMENT IN PERFORMANCE RANGING FROM 7 TO 50%.

Details

  • Original title: PERFORMANCE TEST OF A DIRECT EXPANSION HEAT PUMP SYSTEM.
  • Record ID : 1989-1567
  • Languages: English
  • Publication date: 1988
  • Source: Source: ASHRAE Trans.
    vol. 94; n. 1; 318-329; 13 fig.; 4 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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