TABLE OF CONTENTS - The Professional Green Building Council

Theme B: Creating a livable, healthy and environmentally viable citiesTemperature recorder with dataloggerPower analyzer with data loggerFigure 8: Typical metering equipmenti. Air-sidea) ZoningIn one project, although variable speed drive for air handling unit (AHU) andvariable air volume (VAV) system had been adopted to suit the operation need andto achieve optimum energy use, it was found that there were also some areas whichhad different operational schedule after the occupation. Such operation modeprovided a good opportunity to further reduce the air supply to unused areas.Therefore, similar to lighting control, the proper zoning into an optimum size tosuit the actual operation needs deserve more effort and better planning in thedesign stage.b) Occupancy sensorSome buildings also used occupancy sensors to control the on-off air supply tocellar offices. It proved to be an effective means of saving wasted energy.However, the proper setting of sensor sensitivity and time lag are important tomeet the end-user’s requirement. The use of CO 2 sensors for fresh air supply wasalso proved to be effective to optimize energy use while maintaining a good indoorair quality.ii. Water-sidea) Chiller control535