Study on Influencing Factors of Night Ventilation in Office Rooms

摘要

A mathematical and physical model on night ventilation is set up. The fields of indoor air temperature, air velocity and thermal comfort are simulated using Airpak software. Some main influencing factors of night ventilation in office rooms in Harbin are simulated and analyzed. The results show that the inlet velocity and area can influence the effects of night ventilation. When the inlet velocity is 2.5m/s, both indoor air temperature and air velocity meet ASHRAE standard 55-2004. Indoor environment may be improved further at the inlet velocity of 3.5m/s; however, subjects sitting near the windows feel a draft and are uncomfortable. If the inlet area is 0.15m2, the indoor climate at 1.1m level does not satisfy thermal comfort requirements. On the other hand, it meet the ASHRAE standard when the inlet area is 0.30m2