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从大厅天花板送风口垂直向下送冷风(夏季)和送热风(冬季),大厅下部设回风口,这样的气流组织已为不少工程所采用。但在比较高的大厅,人们往往担心冬季采用这种送风方式热风送不下来。由于冬季送风温度一般高于室内温度15℃～20℃,热风的浮升力大,要想把热风送下来,就必须用较夏季为大的送风速度,克服热风的浮升力。在实际工程中遇到这问题该怎样计算呢?我们在设计首都机场的国际候机楼二层候机大厅的冷、热风垂直下送时采用美国的计算公式,通过1979～1980年冬季供暖实
Cool air (summer) and hot air (winter) are sent vertically from the ceiling air outlet of the hall, and a return air outlet is provided in the lower part of the hall. This air flow organization has been adopted by many projects. However, in the higher halls, people often worry that the use of this air supply method in the winter can not be sent down. Since the winter air temperature is generally higher than the indoor temperature of 15 °C ~ 20 °C, the hot air buoyant lift force, in order to send the hot air down, we must use a larger summer air speed, to overcome the buoyancy of hot air. In the actual project, how to calculate this problem? We used the calculation formula of the United States when designing the cold and hot air at the second floor of the international terminal of the Capital Airport to send the cold and hot air vertically.