冷却顶板-置换通风联合系统房间内的颗粒物浓度分布

利用数值方法,模拟了冷却顶板与置换通风联合空调系统下室内空气温度、速度和粒子浓度分布特征。结果指出,这种空调通风方式中,室内垂直温差小,可形成良好的室内热环境、并有较好的热舒适性。对于室内粒子浓度分布,在典型污染高度下,呼吸面高度处粒子浓度较高,但在热泳力的作用下,贴近人体的小范围内粒子浓度明显降低。同时,由于冷吊顶成为粒子汇,房间上部区域的粒子浓度较低。

The Particle Concentration Distributions in a Room with Chilling Ceiling and Displacement Ventilation Combined Room

The effect of the indoor air velocity, temperature and particle concentration distributions were investigated by numerical simulating in a room with chilling ceiling and displacement ventilation. The results indicate that small vertical temperature difference in the room can create an acceptable indoor thermal environment and thermal comfort. The results also show that, with contaminant source at the typical height from the floor, the particle concentration at the face height is higher that other positions. But, due to the thermophoretic force, the concentration close to the human model decreases obviously. Similarly, it is easy for particles to deposit onto the surface of chilling ceiling, the particle concentration de- creases in the upper zones of the room due to thermophoretic migration.