5、能减少空调的用电量和屋面的翻新修补,其节省的费用所占的比例可达20%以上。所以,将屋顶漆成白色,不仅节能、降温,还能减少二氧化碳排放,有利于环境保护,其费用也是低廉的。本论文独具创新地对“白屋顶计划”做了更全面,更有效的研究,并取得了重大的结论。据统计,在国内还是为数不多的。希望能给国家甚至世界各国探索“白屋顶计划”有很好的借鉴作用。参赛队号1351参赛密码(由组委会填写)所选题目B#1351AbstractThis article aims to establish a mathematicalmodel to assess the role played by th
6、e "White Roofs Plan" toreduce the urban heat island effect. Modelone ,using the knowledgeof colorand thermalopticalto establish best color matching model based on the spectral reflectance of the roof.Thereflectivity ofthe white roof in the visible regionis higher than color roof, but als
7、o it is much higherthan the black roof. Among them, the white roof reflectivityis about 0.8 and the black roof reflectivityis about0.1.Therefore,thecityroofispaintedwhitesothanitcanreduce the absorption rateof the sun. Model two, according to the white and black roof refl