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实际测量华东地区某实验建筑中的太阳能烟囱通风量,所得结果与理论计算、数值模拟相比较,结果显示实际测量通风量普遍低于理论值。测量当日9∶15~13∶15时间段内太阳能烟囱垂直面上太阳总辐射强度为5~600 W/m2,实测风口的通风速率为0.02~0.45 m/s。通过数据分析得到实际工程中太阳能烟囱的流量系数Cd推荐值0.51。通过数值模拟研讨了太阳能烟囱结构尺寸对其产生自然通风量的影响,结果表明太阳能烟囱的高度与宽度均与太阳能烟囱通风量大小呈正相关,对于竖直式太阳能烟囱存在最佳高宽比0.3~0.4使其达到最大通风量。
The actual measurement of the solar chimney ventilation in an experimental building in East China, the results obtained with the theoretical calculation, numerical simulation results show that the actual measured ventilation generally lower than the theoretical value. The total solar radiation intensity on the vertical plane of the solar chimney from 9:15 to 13:15 on the day of measurement was 5 ~ 600 W / m2, and the measured ventilation rate was 0.02 ~ 0.45 m / s. Through the data analysis, we get the recommended Cd value of 0.51 for the flow coefficient of the solar chimney in the actual project. The results show that the height and width of the solar chimney are positively correlated with the ventilation capacity of the solar chimney. For the vertical solar chimney, the optimal aspect ratio is 0.3 ~ 0.4 to reach the maximum ventilation.