CONTINUOUS COMMISSIONING ENERGY MANAGEMENT CASE STUDY OF AN OUTPATIENT CLINIC BUILDING

摘要

The Continuous Commissioning (CC) utilizes thernHVAC system retrofit with system optimization theory andrnadvanced technologies in a federal outpatient clinicrnbuilding. The case study building has a basement and arnfirst floor with patient rooms, offices and pharmacy rooms.rnThe HVAC system consists of two single-duct VAV airrnhandling units (AHUs), 112 single-duct pneumaticrncontrolled pressure independent terminal boxes andrnassociated hot/chilled water booster pumps. Both AHUsrnshare one heat recovery heat exchanger. Major retrofitrnefforts include installing VFD on exhaust fan and reheatrnhot water pump, installing Fan Airflow Stations (FAS) andrnPump Waterflow Stations (PWS). This paper presents thernoptimal control strategies, which include outside air intakerncontrol, heat recovery from exhaust air control, supply fanrncontrol integrated with FAS, return fan control, optimalrncontrol for terminal boxes, hot water and chilled waterrnpump speed control. The measured daily utility data afterrnCC shows that HVAC electricity consumption is reducedrnby 50% and reheat energy is reduced by 40%.