夏热冬冷地区植被屋面热质传递模型及实验验证  

Heat and mass transfer model of vegetation roofs in hot and humid climate region and its experimental verification

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作  者:郭兴国[1,2,3] 何石维 王佳 刘向伟[1,2,3] GUO Xingguo;HE Shiwei;WANG Jia;LIU Xiangwei(School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China;Key Laboratory of Ultra-Low Energy Consumption Building in Jiangxi Province,Nanchang University,Nanchang 330031,China;Near Zero Energy consumption Building Engineering Laboratory of Jiangxi Province,Nanchang University,Nanchang 330031,China)

机构地区:[1]南昌大学建筑工程学院,江西南昌330031 [2]南昌大学江西省超低能耗建筑重点实验室,江西南昌330031 [3]南昌大学江西省近零能耗建筑工程实验室,江西南昌330031

出  处:《南昌大学学报(工科版)》2020年第4期355-360,367,共7页Journal of Nanchang University(Engineering & Technology)

基  金:国家自然科学基金资助项目(51708271);南昌大学研究生创新专项资金资助项目(CX2019112)。

摘  要:通过对夏热冬冷地区植被屋面热质传递机制进行分析,建立了植被屋面热质传递模型,用COMSOL软件对该模型进行模拟求解。同时,在南昌地区搭建植被屋面实验平台对植被屋面的热质传递特性进行实验测定,并将实验测试结果与模拟结果进行对比分析。结果表明:土壤层表面实测温度值与新建模型模拟值的平均偏差约为0.86℃,实测与模拟相对湿度的平均偏差约为3.17%;土壤5 cm处实测温度值与模拟值的平均偏差约为0.96℃,实测与模拟相对湿度的平均偏差约为2.22%;模拟与实测屋顶内表面温度的平均偏差约为0.998℃,实测与模拟热流值的平均偏差约为2.09 W·m^(-2)。Knowing the related theory and experimental research of vegetation roofing is of great significance for improving indoor hygrothermal environment and building energy efficiency.In this paper,the vegetation roof was simplified as an integrated heat and mass transfer model of outdoor air-vegetation-soil-roof board.By analyzing the heat and mass transfer mechanism of vegetation roofing,the heat and mass transfer model of vegetation roofing was established,and the model was simulated and solved by COMSOL.Meanwhile,an experimental platform was set up in Nanchang area to measure the thermal and mass transfer characteristics of vegetation roofs,and the experimental results were compared with the simulation results.The results showed that the average deviation temperature between measured on the surface of the soil layer and simulated by the new model was about 0.86℃,and the average deviation of relative humidity was about 3.17%.The average deviation temperature between measured at 5 cm of soil and simulated value of the new model was about 0.96℃,and the average deviation of relative humidity was about 2.22%.The average deviation of the simulated and the measured roof internal surface temperature was about 0.998℃,and the average deviation of the measured and the simulated heat flow value was about 2.09 W·m^(-2).The comparison between the numerical simulation and the measured results showed that there was a good agreement between the predicted and measured values of the new model,and the model can provide a theoretical method for predicting the thermal and humid performance of vegetation roofs in hot summer and cold winter areas.

关 键 词:植被屋面 热质传递 夏热冬冷地区 

分 类 号:TU111.1[建筑科学—建筑理论]

 

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