Simulation and analysis of the indoors thermal environment in the high elevated waiting hall of Kunming railway station

The high-elevated waiting hall of Kunming railway station is 72.65 meters long, 39.4 meters wide and 8.85 meters high. There are large glass curtain walls all around the waiting hall and on the roof there are day lighting lines. It is likely to be overheated in summer. The software PHOENICS is used to carry out a numerical test on the waiting hall under the original design condition and the improving measures, some advices are given. Through analyzing four different schemes, a solution is gained: increase the number of vents on the roof; cancel the day lighting lines; broaden the gate on east wall. It is the best one of recommended means. The thermal environment and the wind field of the waiting hall are also simulated. Not only the ventilation but also the indoor temperature lower than 27°C is guaranteed, which meets the requirements for the people is activity in the hall.