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COMPARISON OF TWO CONTROL STRATEGIES TO SIMULATE PART-LOAD PERFORMANCE OF A SIMPLE AIR-CONDITIONING SYSTEM.

Author(s) : HOWELL R. H., GANESH R., SAUER H. J. Jr

Summary

COIL AIR BYPASS AND CHILLED WATER FLOW CONTROL ARE COMMON MEANS FOR CONTROLLING SPACE TEMPERATURE IN AIR-CONDITIONING SYSTEMS DURING PART-LOAD OPERATION. SOMETIMES THIS RESULTS IN EXTREME CHANGES OF RELATIVE HUMIDITY. THIS SITUATION WAS INVESTIGATED BY USING AN IMPROVED MICROCOMPUTER MODEL. TWO SEPARATE CONTROL STRATEGIES WERE CONSIDERED: (1) MODULATING THE CHILLED WATER FLOW RATE ; AND(2) VARYING THE PERCENT OF BYPASS AIR. ALTHOUGH THE LOAD AT THE COIL WAS ABOUT 11% GREATER FOR BYPASS AIR CONTROL WHEN COMPARED TO CHILLED WATER CONTROL FOR THE PART-LOAD RANGE CONSIDERED, MUCH BETTER CONTROL OF THE RELATIVE HUMIDITY AND COMFORT CONDITION WAS OBTAINED WITH THE FORMER.

Details

  • Original title: COMPARISON OF TWO CONTROL STRATEGIES TO SIMULATE PART-LOAD PERFORMANCE OF A SIMPLE AIR-CONDITIONING SYSTEM.
  • Record ID : 1988-2428
  • Languages: English
  • Publication date: 1987
  • Source: Source: ASHRAE Trans.
    vol. 93; n. 2; 1768-1780; 11 fig.; 12 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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