用于温室降温的透明辐射薄膜研究  

Investigating Transparent Radiative Film for Greenhouse Cooling

作　　者：王晨曦 邓芳芳 邹豪 杨荣贵 王如竹[1] Wang Chenxi;Deng Fangfang;Zou Hao;Yang Ronggui;Wang Ruzhu(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai,200240,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan,430047,China)

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240 [2]华中科技大学能源与动力工程学院,武汉430047

出　　处：《制冷学报》2024年第1期63-69,共7页Journal of Refrigeration

基　　金：上海市科技兴农项目(2019-02-08-00-08-F01124)资助。

摘　　要：为了缓解夏季温室内高温导致的作物减产、绝产问题,本文给出了一种适用于夏季温室降温的辐射制冷薄膜。通过在常规近红外反射材料表面结合透明辐射层,可强化薄膜自身的天空辐射制冷效果。实验测试确定了该薄膜在不同波段的光学属性,其中光合有效辐射波段透射率为65.9%,近红外波段透射率为20.9%,中红外波段反射率为88.1%。利用温室环境模型对比不同材料覆盖下的温室气温与降温能耗。模拟结果表明:该薄膜可使上海地区密闭温室内部温度降低11.4℃,选择反射层与透明辐射层的降温贡献分别为6.8℃与4.6℃。使用该薄膜,可使主动降温温室的热泵能耗降低26.9%,节能增产效果显著。To alleviate the problem of crop yield reduction and extinction arising from high temperatures in summer greenhouses,a radiative cooling film for greenhouses operated in summer was investigated.The sky radiative cooling effect of a film can be strengthened by integrating a transparent radiation layer with conventional near-infrared reflective materials.The optical properties of films at different wavelengths were determined experimentally,revealing a photosynthetically effective transmissivity of 65.9%,a near-infrared transmissivity of 20.9%,and a mid-infrared reflectivity of 88.1%.A greenhouse environment model was used to compare the greenhouse temperature and energy consumption for cooling with different covering materials.The simulation results showed that the radiative film can reduce the internal temperature of a closed greenhouse in Shanghai by 11.4℃,and the cooling contributions of the selective near-infrared reflector and the transparent radiative layer were 6.8℃and 4.6℃,respectively.Using this film,the energy consumption of heat pumps in an active-cooling greenhouse can be reduced by 26.9%.This film offers a promising solution for achieving energy-efficient and highyield agriculture during the hot summer.

关 键 词：辐射制冷 数值模拟 光谱选择性 红外辐射 

分 类 号：TB64[一般工业技术—制冷工程] TB66[天文地球—大气科学及气象学] P422