基于辐射型反射涂层的热控制墙体性能分析  

Performance analysis of thermally controlled walls based on radiant reflective coating

作　　者：胡轩宇 殷勇高[1,2] 赵兴旺 Hu Xuanyu;Yin Yonggao;Zhao Xingwang(School of Energy and Environment,Southeast University,Nanjing 211189,China;Engineering Research Center for Building Energy Environment and Equipments of Ministry of Education,Nanjing 211189,China)

机构地区：[1]东南大学能源与环境学院,南京211189 [2]东南大学低碳型建筑环境设备与系统节能教育部工程研究中心,南京211189

出　　处：《东南大学学报（自然科学版）》2024年第2期465-474,共10页Journal of Southeast University：Natural Science Edition

基　　金：国家重点研发计划资助项目(2018YFC0705306)。

摘　　要：为评估基于辐射型反射涂层的热控制墙体节能效果,解决相关评测体系缺失问题,建立墙体瞬态传热模型,探究复杂气候交变环境下墙体温度和热流的动态特性,以及辐射换热在被动式制冷过程中的热调控作用,基于热流和墙体传热系数提出一种新的评估模型进行性能评价.结果表明:在室内空调开启情况下,热控制墙体相比于普通墙体,其外表面温度平均下降10.74%,热流提升了281.54%;在夏热冬暖地区,建筑南侧涂覆辐射型反射涂层效果最佳,涂层可以降低建筑全年冷负荷87.8 MJ/m2;在夏热冬冷地区,建筑西面涂覆辐射型反射涂层可以降低建筑全年总负荷26.3 MJ/m2.所提出的性能评价指标能够刻画热控制墙体一天内的传热过程和传热特性,进而得到墙体的折合传热系数,对指导实际建筑施工、降低建筑全生命周期总能耗有重要意义.To evaluate the energy-saving effect of heat-controlled walls based on radiant reflective coatings and to solve the problem of the lack of relevant evaluation systems,a transie2nt heat transfer model for walls is established to investigate the dynamic characteristics of wall temperature and heat flow under complex climatic alternating environments,as well as the role of radiant heat transfer as a heat regulator in the passive cooling process.In addition,a new evaluation model based on the heat flow and heat transfer coefficients of the walls is proposed for performance evaluation.The results show that under the condition of indoor air-conditioning,the external surface temperature of the thermally controlled wall decreases by 10.74%on average and the heat flow improves by 281.54%compared with the normal wall;in the hot summer and warm winter regions,the radiant reflective coating on the south side of the building has the best effect,and the coating can reduce the annual cold load of the building by 87.8 MJ/m 2;in the hot summer and cold winter regions,radiant reflective coating on the west side of a building can reduce the total annual load of the building by 26.3 MJ/m 2.The proposed performance evaluation index can characterize the heat transfer process and heat transfer characteristics of thermally controlled walls within one day,and then obtain the discounted heat transfer coefficient of the walls,which is important for guiding the actual building construction and reducing the total energy consumption of the whole building life cycle.

关 键 词：辐射型反射涂层 数值模拟 动态特性 建筑节能 评价指标 

分 类 号：TU111.19[建筑科学—建筑理论]