严寒及寒冷地区轨道交通高大厂房风幕阻风特性研究

Study on wind-resistance characteristics of wind curtains of rail transit tall workshops in severe cold and cold zones

冷风侵入是严寒、寒冷地区轨道交通高大厂房供暖热负荷的重要来源与核心影响因素。为探究可行、有效的阻风措施,基于实际工程建立了模型,通过数值模拟方法,对不同类型大门风幕的阻风特性进行了系统研究与量化分析。结果表明:为有效控制由大门常开导致的热量损失,在无列车进出时,应采取手动或自动的方式及时关闭大门,在有列车进出时,应开启大门风幕阻挡冷风侵入;针对严寒、寒冷地区轨道交通领域的高大厂房,应采用双侧送常温风幕替代常规顶送热风幕,以有效阻挡冬季冷风侵入,降低竖直与水平方向的温度梯度,在为库内人员创造舒适热环境的同时,降低供暖系统能耗。

The intrusion of cold wind is an important source and core influencing factor of the heating load of rail transit tall workshops in severe cold and cold zones.In order to explore feasible and effective wind resistance measures,establishes a model based on actual engineering,and systematically studies and quantitatively analyses the wind-resistance characteristics of different types of door wind curtains through numerical simulation methods.The results show that,in order to effectively control the heat loss caused by the door normally open,the door should be closed manually or automatically in time when there is no train entering or leaving,and the door wind curtain should be opened to prevent cold wind intrusion when there is a train entering or leaving.For tall workshops in the rail transit field in severe clod and cold zones,double-sided normal temperature wind curtains should be used instead of conventional top-fed hot wind curtains to effectively block the intrusion of cold wind in winter,reduces vertical and horizontal temperature gradients,and creates a comfortable thermal environment for people in the warehouse.At the same time,reduces the energy consumption of the heating system.