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为了进一步量化太阳辐射对辐射顶板供冷能力和负荷的影响,在分析室内太阳辐射分布和传播路径的基础上,提出采用吸收系数法计算被辐射顶板直接吸收的太阳短波辐射。结果表明,在长沙地区采用辐射顶板系统的某典型写字楼房间内,即使南向为低辐射玻璃(Low-E玻璃),入射到室内被辐射顶板直接吸收的太阳辐射的比例也高达20%。因此,在这些场所应用辐射空调系统必须充分考虑太阳辐射对其供冷能力和负荷的影响。
In order to further quantify the influence of solar radiation on the cooling capacity and load of radiant roof, based on the analysis of indoor solar radiation distribution and propagation path, the absorption coefficient method is proposed to calculate the solar shortwave radiation directly absorbed by the radiant roof. The results show that in a typical office building in Changsha with a radiant roof system, the proportion of solar radiation that is directly absorbed by the radiant roof into the room is as high as 20%, even though the south is Low-E glass. Therefore, the application of radiant air conditioning systems in these locations must take full account of the effects of solar radiation on their cooling capacity and load.