内遮阳加屋顶排风对中庭热环境的影响效果分析

Effect Analysis of Inner Shading with Roof Exhausting for Thermal Environment of Atrium

内遮阳在减少由于太阳直射引起的室内得热的同时会使遮阳材料与玻璃之间形成高温空气层,并以长波辐射的形式向中庭传热,继续影响室内热环境和人体热舒适性条件。通过模拟计算的方法分析在内遮阳与玻璃之间加装排风机后室内热环境与人体辐射换热量的改善效果。结果证明,顶排风机可以将内遮阳与玻璃之间的高温空气及时排出,降低中庭高楼层环境的平均辐射温度,并且能够显著降低高楼层环境与人体的辐射换热量,提高中庭环境的热舒适性。

While reducing the indoor heat gain caused by direct solar radiation, internal shading will form an air layer of high temperature between the shading material and glass, and transfer heat to the atrium in the form of long wave radiation which will affect the indoor thermal environment and people＇s thermal comfort condition. With the method of simulation and calculation, the paper analyzes the effect on improvement of the radiation heat transfer between indoor thermal environment and human body after installing roof exhausting between shading and glass. Results show that, roof exhausting blowers can discharge the high temperature air between shade and glass in time. The average radiation temperature of high layers of the atrium as well as the radiation heat transfer between high-layer environment and human body will be reduced. The thermal comfort of theatrium environment can be improved.