An office building in Shenzhen was selected as an example to study the effects of indoor temperature setup, air supply temperature difference, cold and cooling water temperature difference on energy consumption of air conditioning systems, based on the established physical and mathematical model. The results show that indoor temperature setup has relatively large influence on the air conditioning load and energy consumption. With indoor temperature setup increasing by 1℃, the air conditioning load decreases by 5.6%, and Coefficient of Performance (COP) and Energy Efficiency Ratio (EER) increase by 7.2% and 4.75% . With air supply temperature difference increasing by 1℃, the air conditioning load decreases by 4%, and COP and EER decrease by 5.2% and 4.64%. With cold water temperature difference increasing by 1℃, the cold water transfer factor increases by 7.85%. With cooling water temperature difference increasing by 1℃, the cooling water transfer factor increases by 8.68%.

air conditioning system  /  energy consumption  /  energy efficiency ratio  /  coefficient of performance  /  transfer factor