墙体保温形式对冬季太阳能实际吸收率的影响  

Effect of insulation form on the solar energy absorption rate of south-facing wall

作　　者：李贺 钟珂[1] 张红婴[1] 亢燕铭[1] LI He;ZHONG Ke;ZHANG Hongying;KANG Yanming(School of Environmental Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《哈尔滨工程大学学报》2018年第11期1854-1860,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51478098)

摘　　要：针对如何量化冬季实际传入建筑物墙体内部的太阳能问题,本文以室内、外空气温差作用时的墙体传热量为基准,对传入墙体内部的辐射得热量进行了分析。为准确估计传入南墙内部的太阳辐射热量,给出了内、外保温条件下,南墙的冬季全天太阳能实际吸收率与外表面对流换热系数和连续日照天数的关联式。结果认为:尽管墙体对太阳能的实际吸收率在昼间很高,但全天实际吸收率偏低。外保温墙体的全天太阳能实际吸收率仅约为内保温墙体时的1/2,且二者均随着对流换热系数和连续日照天数的增加而减小。To quantify the amount of solar energy absorbed by buildings that are transferred indoors,this study analyzes the radiated heat absorbed by a south-facing wall based on the quantity of heat transferred through the wall using the difference between the indoor and outdoor temperatures.To accurately estimate the quantity of radiant solar energy absorbed by the south-facing wall,empirical formulas are given which express the correlation between the solar energy absorption rate and the convective heat transfer coefficient of the outer wall surface and the correlation between the adsorption rate and the number of consecutive sunny days of the internally and externally insulated south-facing wall.The results show that the actual solar absorption rate of the wall in the daytime is very high,but it is actually low,considering the whole day.The solar energy absorption rate of the wall with external insulation is approximately half of that with internal insulation,but they both decrease with the increase in convective heat transfer coefficient and the number of consecutive sunshine days.

关 键 词：太阳能 保温形式 冬季 数值模拟 太阳能实际吸收率 对流换热系数 连续日照天数 

分 类 号：TK519[动力工程及工程热物理—热能工程] TU831.2[建筑科学—供热、供燃气、通风及空调工程]