摘要
辐射型反射隔热涂料在夏热冬冷地区居住建筑中的应用案例越来越多,其节能设计方法备受关注。等效热阻法是目前反射隔热涂料热工设计的标准方法,但相关文献研究指出,涂覆于非透明材料上的隔热涂料应采用太阳光直接反射比作为隔热评价指标,不宜用等效热阻来评价。通过上海某6层住宅建筑探讨了夏热冬冷地区居住建筑外墙采用辐射型反射隔热涂料的节能效果及其传热系数、太阳辐射吸收系数和表面发射率之间的关系,对比分析了采用参数直接计算与等效热阻法计算能耗结果,结果表明:1)辐射型反射隔热涂料隔热机理与反射隔热涂料差异明显;2)辐射型反射隔热涂料节能效果不适宜采用等效热阻法进行节能效果评价;3)辐射型反射隔热涂料墙体冬季保温热阻设计应充分考虑其对墙体温度的负面影响。
More and more radiation-type thermal insulation coatings are used on the residential buildings in the hot summer and cold winter zone and the thermal performance design methods are also receiving more attentions.The equivalent thermal resistance method is specified by the standard JGJ/T359 for considering the effect of the thermal reflective insulation coatings.However,some literature researches indicates that the energy efficiency used the thermal reflective insulation coatings on the non-transparent fagades should be evaluated by the solar reflective as the insulation evaluation index rather than the equivalent thermal resistance.This paper is to discuss the energy efficiency of using radiation-type thermal insulation coatings on the outside of the exterior walls of residential buildings in hot summer and cold winter areas in Shanghai,and the relationship between the energy consumption of the air conditioner,heat transfer coeficient,solar radiation absorption coefficient,and surface emissivity of the wall is studied.The energy consumption results are calculated using the thermal parameters directly and that of using the equivalent thermal resistance method are also carried out.The results shown that:1)The insulation mechanism of the radiation-type thermal insulation coatings is significantly different from that of the reflective insulation coatings;2)The energy-saving effect of the radiation-type thermal insulation coatings is not suitable evaluated by using the equivalent thermal resistance method;3)The design of the winter insulation thermal resistance of the wall using the radiation-type thermal insulation coatings should fully consider its negative impact on wall's temperature in the winter nightime.
作者
范宏武
杨霞
夏文丽
乔正珺
Zone FAN Hongwu;YANG Xia;XIA Wenli;QIAO Zhengjun(Shanghai Research Institute of Building Sciences Co.,Ltd,Shanghai 200032,China)
出处
《建筑节能（中英文）》
CAS
2024年第5期58-61,66,共5页
Building Energy Efficiency
基金
上海市科委项目“建筑碳排放核算方法研究与标准编制”(22DZ2200800)。
关键词
辐射型反射隔热涂料
夏热冬冷地区
居住建筑
节能评价方法
radiation-type thermal insulation coating
hot summer and cold winter zone
residential buildings
energy efficiency evaluation method
作者简介
通讯作者:范宏武(1973),男,陕西澄城人,毕业于哈尔滨工业大学,热能工程专业,博士,教授级高级工程师,主要从事零能耗建筑、零碳建筑、绿色建筑和可再生能源利用方面的研究(fanhongwu@126.com)。
