College of Environmental Science and Engineering,Donghua University
为预测与分析绿色植被屋顶传热传质模型植被温度及土壤上表面温度,该研究以土壤-植被-大气系统的能量平衡、热量和质量连续性为理论基础,建立了绿色屋顶传热传质单节点数学模型,采用理论分析求解和非线性回归方法得到了植被层温度及土壤上表面温度预测表达式,通过测量数据及与其他模型比较验证了模型和温度预测表达式的可靠性,分析讨论了绿色屋顶的降温效果。结果表明：绿色屋顶产生负热通量,对建筑房间进行冷却,进入绿色屋顶结构层的热流量变化为-3.59~-1.45 W.m-2,而进入普通屋顶的热流量变化为-3.66~21.1 W.m-2；绿色屋顶的存在使屋顶上表面温度的波动较平稳,将每日温度波动从27.0 ℃降低到4.6 ℃；普通屋顶上表面温度对太阳辐射较敏感,在太阳辐射达到最大值的同时达到峰值,而绿色屋顶对太阳辐射不敏感；温度预测表达式能较准确地预测植被温度和土壤上表面温度。绿色屋顶能显著降低屋顶下表面温度。
This paper studies a single node mathematical model of heat and mass transfer of green roof was established based on the theory of energy balance, heat and mass continuity of soil vegetation atmosphere system to predict the heat and mass transfer model of green roof. The prediction expressions of vegetation layer temperature and soil surface temperature were obtained by theoretical analysis and nonlinear regression Formula. The reliability of the model and temperature prediction expression is verified by measuring data and comparing with other models, and the cooling effect of the green roof was analyzed and discussed. The results show that the green roof produces negative heat flux and cools the building room. The heat flux into the green roof structure layer changes from -3.59~-1.45 W·m-2, while the heat flux into the common roof changes from -3.66~21.1 W·m-2. The existence of the green roof makes the fluctuation of the surface temperature of the roof more stable, reducing the daily temperature fluctuation from 27.0 ℃ to 4.6 ℃. The surface temperature of the common roof is more sensitive to the solar radiation, reaching the peak value when the solar radiation reaches the maximum value, while the green roof is not sensitive to the solar radiation. The temperature prediction expression can predict the vegetation temperature and the surface temperature of the soil more accurately. Green roof can significantly reduce the temperature of the lower surface of the roof.
董玉芳,付海明. 夏季绿色屋顶单节点传热传质模型温度预测与分析[J]. 科学技术与工程, , ():复制