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中文摘要：
植被屋顶以其良好的热工性能和特有的生态效应成为了建筑热工学当前的研究热点之一。在对植被屋顶进行能量分析时，植物光合作用消耗的能量一般被忽略。本文从理论上分析比较了屋顶植被光合作用和蒸腾作用消耗的能量，计算得出C3和C4植物光合作用消耗的能量不超过蒸腾作用消耗能量的3％，但CAM植物光合作用消耗的能量可以达到蒸腾作用消耗能量的5％～38％，因此这部分能量不能轻易忽略。在此基础上，本文提出了考虑光合作用时对既有屋顶植被冠层能量方程的理论修正方法。
英文摘要：
The research of green roof is becoming important due to its excellent thermal properties and unique eco-social effects. When the energy of green roof was analyzed,the energy that consumed by photosynthesis was often neglected. In this paper,the energy consumed by photosynthesis and transpiration were compared and analyzed theoretically. The results indicated that for C3 and C4 plants, the energy consumed by photosynthesis was no more than 3 % of the energy consumed by transpiration, while for CAM plants, the corresponding percentage ranged from 5% to 38%. Hence, for CAM plants, the energy consumed by photosynthesis could not be neglected. Based on this conclusion, a theoretical correction method for energy equation of foliage layer for roof plants was proposed.
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