Discussion on determination of air conditioning indoor design temperature in underground commercial rooms

 According to the difference of indoor air temperature and average radiation temperature of underground commercial rooms in different climate areas, studies the effect of ground temperature on human thermal comfort in underground rooms by using DeST software simulation and field measurement. It is found that if the indoor air temperature of underground commercial rooms is designed according to the current standard, there are obvious differences in human thermal sensation PMV in different climate areas. Suggests that the indoor design temperature of air conditioning in underground commercial rooms should be determined according to the ground temperature and the covered area ratio (the ratio of the external enclosure area of the room to the total area of room enclosure). Provides the recommended temperature range of air conditioning room in winter and summer for underground commercial room with covered area ratio from 0.21 to 0.79 in different climate areas according to the thermal comfort level.