宁波站候车厅供暖效果的改善研究

On the Heating Effect in Ningbo Railway Station Hall and the Improvement

宁波站候车大厅建筑空间属于典型的高大空间。为改善冬季空调热风上浮,减少垂直方向温度梯度明显的现象,利用在夏季高区排除余热的通风系统,在冬季将高区上浮聚集的热空气向下高速喷送,以优化候车大厅的候车区温度场。利用计算机数值模拟计算手段,比较了6种不同的设计工况对候车区冬季温度场及速度场的影响,得出冬季供热工况随着屋顶风机的开启对热气流上浮有一定抑制效用;且随着向下送风风速的加大,候车区距地2m高度区域人员停留区温度有所上升。这一设计具有一定的节能效果。

The waiting hall of Ningbo Railway Stationis a typical large building with high space. To improve the hot air flotation and reduce the obvious vertical temperature gradient in winter, the ventilation system in upper area of the waiting hall designed for summer is improved, high- speed nozzlesare used to supply hot air for the lower waiting area. Six different design conditions corresponding to the indoor temperature field and velocity field are compared through computer numerical simulation, the results show that in winter the heating condition will get better with the control of hot air flotation, and the increase of air velocitytoward the lower area will raise the temperature in the waiting area about 2m high above the floor,so the goal of energy conservation is partly achieved.