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介绍了一种基于风压和热压耦合作用下的新型屋顶式太阳能烟囱,通过三维数值模拟,研究百叶窗安装高度与烟囱高度比值h_4/h_1、挡风板高度与百叶窗高度比值h_2/h_3、通道Ⅱ宽度与通道Ⅰ宽度比值w_2/w_1、室外风速v和太阳辐射强度I对其通风性能的影响。结果表明:该新型屋顶式太阳能烟囱通风量随h_4/h_1值的增加先增后减,在h_4/h_1=0.15附近通风量达到最大,而烟囱出口截面速度随着h_4/h_1值的增加而减小;随着w_2/w_1值的增加,不同室外风速下的通风量变化趋势不同。
A new type of roof-type solar chimney based on wind pressure and thermal pressure coupling was introduced. By the three-dimensional numerical simulation, the ratio of the installation height of the shutter to the height of the chimney h_4 / h_1, the height of the windshield and the height of the shutter h_2 / h_3, Ⅱ width and channel Ⅰ width ratio w_2 / w_1, outdoor wind speed v and solar radiation intensity I on its ventilation performance. The results show that the ventilation capacity of the new roof solar chimney firstly increases and then decreases with the increase of h_4 / h_1, and reaches the maximum at h_4 / h_1 = 0.15, while the exit velocity of chimney decreases with the increase of h_4 / h_1 With the increase of w_2 / w_1, the change trend of ventilation rate under different outdoor wind speed is different.