屋面夜间辐射对顶层房间冷负荷的影响  

Influence of Roof's Night Radiation on Cooling Load of Top-floor Rooms

作　　者：蒋建平[1] 刘加平[2] 

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

出　　处：《上海应用技术学院学报（自然科学版）》2009年第3期220-222,228,共4页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海市教委科研基金资助项目(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。对夏季夜间通过屋面结构的换热进行理论分析,并对屋面结构分别在考虑夜间辐射和不考虑夜间辐射条件下进行逐时冷负荷计算。结果表明,考虑夜间辐射的屋面冷负荷比未考虑夜间辐射的冷负荷少约16%,空调系统在夏季夜间运行时应考虑其影响以减少制冷耗能。The roof has a big influence on thermal environment of top-floor rooms though it is of a small size. In this paper, the heat transfer through roof on summer night was analyzed and its hourly cooling load was calculated. The results showed that when compared with traditional calculating methods, the cooling load without considering night radiation was bigger than the practical one by about 16%. It can be concluded that it is necessary to consider this heat exchange during summer night to save the energy used by air conditioning.

关 键 词：夜间辐射 夏季冷负荷 顶层房间 

分 类 号：TU831.2[建筑科学—供热、供燃气、通风及空调工程]