Refined Modelling Approach of HVACs in Commercial Buildings

With the aim of promoting the new power system to "source-load interaction" synergy mode transformation, the user-side resource regulation capacity needs to exploit fully. The large power consumption and regulation potential of heating, ventilation, and air conditionings (HVACs) in large commercial buildings have become a typical demand response resource, which has received extensive attention from domestic and international scholars. This paper first constructs a refined model of HVAC including the cooling system, water system, air system, and user area based on the working principle, then models the thermal dynamic process of chilled water piping based on the thermal inertia of the water system, and finally defines the user comfort of HVAC in terms of both air temperature and air quality. The dynamic regulation characteristics of the HVAC under the three modes of cold source temperature regulation, end fan regulation, and integrated coordinated regulation are studied in the calculation part, providing a theoretical basis for the participation of HVAC in power demand response.