辐射制冷技术在夏热冬冷地区的应用潜力分析:以杭州为例

Potential of radiative cooling:a case study in Hangzhou

为探究辐射制冷在以杭州为代表的常年高湿度的我国夏热冬冷地区的应用潜力,本文基于选择性独立法估算并分析了相对湿度对辐射制冷潜能的影响。计算结果表明,温度的升高及相对湿度的增加会显著降低辐射制冷技术的潜力,其中相对湿度的影响更为明显。杭州在近二十年来的最差工况下平均黑体辐射降温功率可达47 W/m^(2),平均天空温降约为8℃,在典型年的春秋两季具有良好的制冷潜力,辐射制冷技术可作为过渡季节的降温补偿工具。因此,辐射制冷技术在杭州等夏热冬冷地区具有一定的应用前景。

To explore the potential of passive radiative cooling in hot-summer and cold-winter zone represented by Hangzhou,the influence of relative humidity on the potential of passive radiative cooling was preliminarily evaluated using the selective independent approach.An increase in temperature and relative humidity significantly reduced the potential of passive radiative cooling technology,and the influence of relative humidity was more obvious.Hangzhou has an average blackbody radiation cooling power of up to 47 W/m^(2)under the worst working conditions in the last two decades,with an average sky temperature drop of about 8℃.It has a good cooling potential in the spring and fall seasons of a typical year,and the radiative cooling technology can be used as a cooling compensation tool in the transitional season.Therefore,radiation refrigeration technology has certain application prospects in hot summer and cold winter areas such as Hangzhou.