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屋顶太阳能集热器的存在改变了屋顶的太阳辐射得热,在一定程度上影响建筑的冷热负荷,特别是对于顶层房间,屋顶是受室外热作用影响最大的外围护结构。本文通过实验测量有太阳能集热器的屋顶和无太阳能集热器的屋顶的外表面温度,建立一维非稳态传热模型,对屋顶的内表面温度及传热量进行数值求解,获得屋顶的热流量数据并对实验结果进行分析。实验结果表明:太阳能集热器的存在会减少屋顶的辐射得热,降低建筑物的夏季冷负荷,增大建筑物的冬季热负荷。
The existence of rooftop solar collectors has changed the solar radiation heat of the roof, to a certain extent, affect the cooling and heating load of the building, especially for the roof room, the roof is the outermost protective structure affected by outdoor heat. In this paper, one-dimensional unsteady heat transfer model was established by experimentally measuring the temperature of the outer surface of the solar collector roof and the roof without the solar collector. The inner surface temperature and heat transfer of the roof were numerically solved, Heat flow data and analysis of experimental results. The experimental results show that the existence of solar collectors will reduce the radiant heat of the roof, reduce the summer cooling load of the building and increase the winter heat load of the building.