Abstract
ABSTRACT Continuous commissioning (CC) utilizes the HVAC system retrofit with system optimization theory and advanced technologies in a federal outpatient clinic building. The case study building has a basement and a first floor with patient rooms, offices, and a pharmacy. The HVAC system consists of two single-duct VAV air handling units (AHUs), 112 single-duct pneumatic controlled pressure independent terminal boxes, and associated hot/chilled water booster pumps. Both AHUs share one heat recovery heat exchanger. Major retrofit efforts include installing a VFD on the exhaust fan and reheat hot water pump, and installing fan airflow stations (FAS) and pump waterflow stations (PWS). This article presents optimal control strategies, which include outside air intake control, heat recovery from exhaust air control, supply fan control integrated with FAS, return fan control, optimal control for terminal boxes, and hot water and chilled water pump speed control. The measured daily utility data after CC shows t...
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