Simulation Study on Energy Consumption of the Air Conditioning System of an Office Building in Chongqing Based on DEST

This paper takes an office building in Chongqing as the research object, conducts hourly simulation of annual building energy consumption based on DEST software, and systematically explores the influence patterns of window-to-wall ratio, number of cooling coil rows, fresh air mode, and north-south zoning control on air-conditioning system energy consumption using the controlled variable method. The study shows that reducing the window-to-wall ratio from 0.5 to 0.4 can reduce the average summer cooling load by 25.19%. Through comparison and selection, it is determined that 4 rows of cooling coils combined with variable fresh air, bypass, and north-south zoning strategies can achieve optimal annual cooling and heating energy consumption while meeting air handling requirements.