建筑外表涂层降温热衰减计算及其热工性能评价  

Thermal Decrement Calculation and Performance Evaluation of Cooling Coatings on the Exterior Surface of Buildings

作　　者：冉茂宇[1] RAN Maoyu(Architecture School of Huaqiao University,Xiamen 361021,Fujian,China)

机构地区：[1]华侨大学建筑学院

出　　处：《建筑科学》2019年第12期108-112,136,共6页Building Science

基　　金：国家自然科学基金资助项目“基于建筑外表材料相变与辐射致冷的隔热节能技术研究”(51078156);基于空调冷凝水回收利用的建筑外表多孔质蒸发与植被绿化降温技术研究(51678254)

摘　　要：在现有围护结构传统隔热计算中,未考虑外表涂层降温的热衰减机制。为了弥补这一不足,本文首先考察了涂层长波发射率和短波吸收率对室外综合温度影响;然后详细分析了涂层降温的热衰减机制,给出了外表实施涂层后的围护结构热衰减的计算方法;最后提出用“附加热阻百分率”和“附加热惰性指标”来评价建筑外表涂层降温的热工性能,并就这两个评价指标的计算给出了具体的表达式。Since the thermal decrement mechanism of cooling coatings on the exterior surface of buildings is not considered in the existing calculation of traditional thermal insulation in the exterior protected construction,the effects of long-wave emissivity and short-wave absorptivity of coating on the outdoor integrated temperature were firstly investigated in this paper,so as to make up for the deficiency.Then,by analyzing the thermal decrement mechanism of cooling coatings in details,a calculation method of thermal decrement of the exterior protected construction after applying coatings on the exterior surface of the building was presented.Finally,the“percentage of attached thermal resistance”and“attached thermal inertia index”,were put forward to evaluate the thermal performances of cooling coatings on the exterior surface of buildings.Meanwhile,specific expressions for calculating the two evaluation indexes were also given.

关 键 词：涂层降温 附加热阻百分率 附加热惰性指标 热工性能评价 

分 类 号：TU119[建筑科学—建筑理论]