太阳辐射吸收系数对围护结构夏季净得热量的影响

发布时间：2018-05-29 13:19

本文选题：夏季 + 太阳辐射　；参考：《太阳能学报》2017年01期

【摘要】：以上海地区的建筑围护结构夏季传热过程为研究背景,在分析太阳辐射作用下围护结构外表面热平衡关系的基础上,采用数值模拟方法,讨论在夏至日太阳辐射吸收系数对不同朝向围护结构表面温度和全天净得热量的影响。结果表明:吸收系数减小率相同时,南墙外表面温度下降率小于其他朝向,而其全天净得热量的减小率则大于其他朝向。不同朝向围护结构表面温度的下降率均小于吸收系数的减小率,但其全天净得热量的减小率均大于吸收系数的减小率,说明降低外墙外表面太阳辐射吸收系数可以有效减少因太阳辐射导致的传入围护结构内部的热量。
[Abstract]:Based on the study of the heat transfer process of the building envelope structure in Shanghai in summer, based on the analysis of the heat balance relationship of the outer surface of the envelope structure under the action of solar radiation, a numerical simulation method is adopted. The effects of solar radiation absorption coefficient on the surface temperature and the total day net heat of the envelope structure with different orientations are discussed in the Summer Solstice. The results show that when the absorption coefficient decreases at the same rate, the temperature drop rate of the outer surface of the south wall is smaller than that of the other directions, while the decrease rate of the total day net heat is larger than that of the other directions. The decrease rate of surface temperature in different directions is smaller than that of absorption coefficient, but the decrease rate of total day net heat is larger than that of absorption coefficient. It is shown that reducing the absorption coefficient of solar radiation on the outer surface of the external wall can effectively reduce the internal heat of the afferent envelope caused by solar radiation.
【作者单位】：东华大学环境科学与工程学院;江西理工大学建筑与测绘工程学院;西安建筑科技大学建筑学院;
【基金】：国家自然科学基金(51478098) 上海市教委科技创新重点项目(13ZZ054)
【分类号】：TU111.4

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