真空罐内应用的太阳模拟灯阵热设计

Thermal design of solar simulation xenon lamp array used in vacuum

为了解决太阳模拟灯阵整体放在真空罐内使用时的导热问题,采用热管导热的方案,设计了专门的氙灯导热机构。计算了液氮系统的导热能力,结果显示,真空罐液氮冷却系统的温度升高ΔT为2.0741K,小于其过冷度4K,表明真空罐液氮冷却系统完全可以将太阳模拟灯阵的热量导出。采用热管导热技术,设计了导热机构,用有限元分析法进行了热仿真分析,分析结果表明,氙灯阴阳极温度维持在100℃左右,氙灯灯泡维持在655℃左右,满足氙灯正常工作的温度条件;积分器和反射镜组件温度维持在200℃左右,椭球镜温度维持在135℃左右,亦满足正常工作的温度条件,从而验证了热设计的正确性。

In order to solve the problem of heat conduction of a solar simulation xenon lamp array used in a vacuum tank, a special heat conduction mechanism for xenon lamps is designed by using a heat pipe technology. The heat conduction ability of the cooling system is calculated, and the results indicate that the temperature change AT of liquid nitrogen cooling system is 2. 074 1 K, lower than a super cooling temperature of 4 K, which points out that the liquid nitrogen cooling system can export the heat of solar simulation xenon lamp array out from the vacuum tank. A heat conduction mechanism is designed, and the finite element analysis is used to carry out thermal simulation analysis. The thermal simulation analysis results show that the temperatures for the anode and cathode of xenon lamp and the bulb of xenon lamp are about 100 ℃ and 655℃, repectively. Moreover, the temperatures of an optical integrator and mirror are both about 200℃ and the temperature of an ellipsoidal mirror is about 135℃, which meets the normal working conditions for a long period. The results obtained prove that the thermal design is feasible and reasonable.