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RETROFIT OF A CONSTANT VOLUME AIR SYSTEM FOR VARIABLE SPEED FAN CONTROL.

Author(s) : JOHNSON G. A.

Summary

RETROFIT OF AIR DISTRIBUTION SYSTEMS FOR ENERGY CONSERVATION FREQUENTLY INVOLVES CONVERSION OF A FIXED AIR VOLUME SYSTEM TO VARIABLE AIR VOLUME (VAV) OPERATION. TWO SINGLE-DUCT SYSTEMS UTILIZING A SINGLE SUPPLY AND SINGLE RETURN FAN FOR COOLING THE INTERIOR ZONE OF AN OFFICE BUILDING WERE MODIFIED. THE RETROFIT TO VAV OPERATION INVOLVED THE APPLICATION OF VARIABLE FREQUENCY DRIVES TO THE FANS AND THE TESTING OF SEVERAL ALTERNATIVE TECHNIQUES FOR AIR FLOW CONTROL. THE RETROFIT YIELDED AN ANNUAL ENERGY SAVINGS OF 46.5% RELATIVE TO CONSTANT VOLUME OPERATION ; THE OTHER SYSTEM PROVIDED AN AVERAGE REDUCTION OF 53.9% FOR THE ONE-YEAR MONITORING PERIOD. THE AUTHOR DESCRIBES THE PARTICULAR CONTROL STRATEGIES TESTED WITH THE VARIABLE SPEED FAN CONTROL SYSTEM AND MAKES SEVERAL RECOMMENDATIONS REGARDING THEIR SUITABILITY AND EFFECT ON OTHERCONTROL LOOPS USED IN VAV SYSTEMS.

Details

  • Original title: RETROFIT OF A CONSTANT VOLUME AIR SYSTEM FOR VARIABLE SPEED FAN CONTROL.
  • Record ID : 1986-0331
  • Languages: English
  • Subject: Environment
  • Publication date: 1984
  • Source: Source: ASHRAE Trans.
    vol. 90; n. 2B; 201-212; 9 fig.; 2 tabl.; 4 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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