内循环贴附射流影响下玻璃幕墙内表面温度预测模型研究  

Prediction Model of Inner Surface Temperature of Glass Curtain Wall Under the Influence of Inner Recirculating Adhesion Jet

作　　者：孟锦程 毕晨 王艺 金梧凤[1] Meng Jincheng;Bi Chen;Wang Yi;Jin Wufeng(Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China)

机构地区：[1]天津商业大学天津市制冷技术重点实验室,天津300134

出　　处：《绿色科技》2023年第2期268-275,共8页Journal of Green Science and Technology

基　　金：天津市创新团队项目资助(编号:TD12-5048)。

摘　　要：针对冬季严寒地区建筑外窗(玻璃幕墙)内表面温度较低造成的辐射不对称问题,开展了内循环贴附射流加热玻璃幕墙内表面的实验和数值模拟研究,提出了0.6 m和1.2 m高度处(人体坐姿膝盖与头部位置)玻璃幕墙内表面温度预测模型。结果表明:加入贴附射流可有效提高外窗(玻璃幕墙)内表面温度,从而缓解外窗(玻璃幕墙)内表面与其他围护结构内表面温差较大引起的辐射不对称问题。此外,由预测模型可知,0.6 m高度处玻璃幕墙内表面温度与内循环贴附射流送风速度、室外温度成正比,与玻璃幕墙传热系数、水平距离、内循环贴附射流送风口安装距、送风角度成反比;1.2 m高度处玻璃幕墙内表面温度与各影响因子为非线性关系。各影响因子中贴附射流送风速度对玻璃幕墙内表面温度影响最显著,其对0.6 m,1.2 m高度处玻璃幕墙内表面温度贡献率分别为43.2%,28.2%;贴附射流送风口安装距离对0.6 m和1.2 m高度处玻璃幕墙内表面温度贡献率分别为13.8%,23%;贴附射流送风角度贡献率较小,其中送风角度对0.6m高度处玻璃幕墙内表面温度并无显著影响,可忽略不计;研究所得温度预测模型与辐射不对称温度计算公式相结合,可为建立内循环贴附射流送风运行策略提供关键的技术支撑。Aiming at the problem of radiation asymmetry caused by low inner surface temperature of external windows in cold regions,experimental and numerical simulation research on inner surface of glass curtain wall heated by internal loop attached-wall-jet is carried out,and a prediction model of inner surface temperature of glass curtain wall at the height of 0.6m and 1.2m(knee and head position of human sitting posture)is proposed.The results show that the inner surface temperature of the outer window(glass curtain wall)can be increased effectively by adding the attached-wall-jet,thus alleviating the radiation asymmetry problem caused by the large temperature difference between the inner surface of the outer window(glass curtain wall)and the inner surface of other envelope structures.Moreover,according to the prediction model,the inner surface temperature of the glass curtain wall at the height of 0.6m is directly proportional to air supply velocity of attached-wall-jet and outdoor temperature,but also inversely proportional to heat transfer coefficient of the glass curtain wall,horizontal distance,installation distance of air supply outlet of the inner loop attached-wall-jet and the angle of air supply of the inner loop attached-wall-jet.The inner surface temperature of the glass curtain wall at 1.2m has a nonlinear relationship with the influencing factors.Among the influencing factors,the contribution rate of the air supply velocity to the inner surface temperature of the glass curtain wall at the height of 0.6m and 1.2m was 43.2%and 28.2%,respectively,which have the most significant effect on the inner surface temperature of the glass curtain wall.The contribution rate of air supply outlet installation distance to the inner surface temperature of the glass curtain wall at the height of 0.6m and 1.2 m is 13.8%and 23%,respectively.The contribution rate of air supply angle is small,and the air supply angle has no significant effect on the inner surface temperature of the glass curtain wall at a height of 0.6m,which ca

关 键 词：玻璃幕墙内表面温度 预测模型 贡献率 内循环贴附射流 辐射不对称 

分 类 号：TU228[建筑科学—建筑设计及理论]