Model-free occupancy-based control of variable-air-volume terminal boxes: demo abstract
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In this demo abstract, we describe an occupancy-based control (OBC) system under development that has potential to save 18% of the energy use on average in office buildings having single-duct variable-air-volume (VAV) heating, ventilating and air-conditioning systems. The OBC system uses the measured number of occupants to control the airflow rate through the VAV box during times when no heating or cooling is called for by the zone thermostat. It can be retrofit on the terminal boxes in existing VAV systems. The demonstration will provide: 1) background on the concept, energy benefits, system structure, and system components, 2) a working bench-top system with actual terminal box, terminal box controller, and OBC software running on a microprocessor, and 3) a computer-based dashboard that will graphically display occupancy changes of a virtual room, which will drive the bench-top system, and key variables that show the behavior of the OBC system and its impacts.
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