The Impact of HVAC Setpoint Temperature on Reducing Building Energy Consumption in Different Climatic Regions of Iran

Energy consumption reduction has become increasingly important today, as buildings contribute significantly to energy use. Therefore, strategies to reduce energy consumption in this sector can have a substantial impact on reducing national energy consumption. This research analyzes the energy consumption of a building (a case study of a ۴۹۲-unit residential complex in Farhangshahr, Ahvaz) and the effect of HVAC setpoint temperature on reducing building energy consumption in four cities with different climates in Iran. To analyze the results, the building design process was simulated using AutoCAD maps in the DesignBuilder software, and EnergyPlus was used for energy calculations. Results show that cooling accounts for ۹۶.۱% of energy use in Ahvaz, while heating comprises ۸۴.۶% in Tabriz. In Tehran and Yazd, cooling represents ۵۴.۶% and ۶۵.۵% of total consumption, respectively. Increasing the cooling setpoint from ۲۲°C to ۲۷°C reduces cooling load by ۳۵.۷% in Ahvaz and electricity use by ۴۴.۶ MWh annually. Lowering the heating setpoint from ۲۱°C to ۱۶°C decreases heating load by ۳۶.۴% in Tabriz and gas consumption by ۲۵.۸ MWh. These findings emphasize the significant energy savings achievable by optimizing setpoint temperatures based on climate conditions. Additionally, reducing the heating setpoint from ۲۱°C to ۱۶°C results in a ۳۲.۶% decrease in annual CO₂ emissions in Ahvaz, with further reductions of ۳۹.۶%, ۴۰%, and ۴۰.۲% observed in Yazd, Tehran, and Tabriz, respectively.

کلیدواژه ها:

setpoint temperature ، Energy consumption ، Cooling Load ، Heating load ، energy savings ، CO₂ emissions