一种新型太空辐射致冷装置的实验研究  

Experimental Study on A New Space Radiative Cooling Device

作　　者：芮智刚[1] 张旭朋[1] 程亚利[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《制冷学报》2010年第4期57-62,共6页Journal of Refrigeration

摘　　要：分析了辐射致冷的可行性,然后利用红外发射率测定仪测定了几种材料的红外发射率。研制了利用空气为冷媒介质的辐射致冷实验装置,并依据发汗致冷的原理设计了一种新型装置,在同一条件下进行了对比实验。实验结果表明:分别用PET薄膜和PTFE薄膜作为辐射体,当室外环境温度为29℃时,静态实验可获得与环境的最大温差分别为11℃和9℃;连续空气流动实验时,装置出口处冷空气与环境的最大温差分别为4.7℃和5.4℃,利用发汗致冷原理制成的装置,稳定后装置出口处冷空气与环境的最大温差为7.8℃,通过计算该工况下的致冷功率达到116W/m2,故该装置可实现建筑夏季夜间的连续降温。The feasibility of radiative cooling was analyzed and the emissivities of several materials were measured by using an infrared emission detector. An experimental rig for radiative cooling was set up with air as the cooling medium. A new device on the basis of the principle of transpiration cooling was designed, and the static and continuous air flow experiments were conducted under the same condition. The results show that by using PET film and PTFE film as the radiators, the maximum air temperature difference between the cooled space and the surroundings reached 11 ℃ and 9℃, respectively, in the static experiment, and the air temperature difference between the outlet of the device and the surroundings was up to 4.7 ℃ and 5.4 ℃, respectively, in the continuous air flow experiment when the outdoor temperature was 29℃. The stable temperature difference between the surroundings and the cooling air at the outlet of transpiration cooling device was up to 7.8℃. The calculated cooling capacity of the device was 116 W/m^2. It seems that the device may realize the continuous cooling for buildings at night in summer.

关 键 词：热工学 辐射致冷 PET薄膜 PTFE薄膜 发汗致冷 连续空气流动实验 

分 类 号：TK551.3[动力工程及工程热物理—热能工程] TB66[一般工业技术—制冷工程]