屋顶夜间辐射对顶层房间热负荷的影响  

Influence of night radiation on heating load of top-floor rooms

作　　者：蒋建平[1,2] 刘加平[1] 李安桂[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]上海应用技术学院土木建筑与安全工程学院,上海200235

出　　处：《西安科技大学学报》2009年第4期445-448,共4页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金重点项目(50638040);上海市教育委员会科技项目(050Z25)

摘　　要：建筑围护结构中,屋顶虽然所占面积较小,但它对顶层房间的室内热环境影响是较大的。文中对冬季夜间通过屋面结构的换热进行理论分析,并对屋面结构进行逐时热负荷计算。计算结果表明,由于夜间辐射的作用,屋面实际热负荷比不考虑夜间辐射时的负荷多20%左右,供暖空调系统在冬季夜间运行时有必要考虑这部分负荷。Roof has big influence on thermal environment of top-floor rooms. In this paper, the heat transfer through roof in winter night was analyzed and its hourly heating load was calculated. The result shows that when compared with traditional calculating method, the heating load without considering night radiation was smaller than the actural one by about 20%. It could be concluded that it was necessary to consider this heat loss during winter night.

关 键 词：夜间辐射 冬季供暖负荷 顶层房间 

分 类 号：TU111.4[建筑科学—建筑理论]