梭形遮阳翻板太阳散射辐射传输计算模型及程序实现

Calculation Model of Solar Diffuse Radiation Transportation Through Shuttle Louvers and Program Realization

摘要:

取相邻2块遮阳翻板为研究对象,建立了梭形翻板散射辐射传输的计算模型.在模型分析基础上，用MATLAB编制了能描述翻板形状、尺寸、倾角、表面光学特性的梭形翻板散射辐射传输计算程序，验证了程序的正确性，并进行了翻板划分段数的敏感性分析.认为翻板散射辐射透过率的相对误差随翻板划分段数增加而减小，划分段数超过8时，计算结果基本不再发生变化.最后，分析了传统计算方法和程序对梭形翻板进行平板假设所带来的误差，认为用“平板假设模型”计算梭形翻板有一定的误差，误差值随着翻板倾角增加而增大.

Abstract:

Two adjacent shuttle louvers were first taken as the research object, the calculation model of solar diffuse radiation transportation through shuttle louvers was established. Based on the model analysis, the calculation program of solar diffuse radiation was developed with the MATLAB to describe the shape, size, tilt angle, and surface optical properties of shuttle louvers. Then, the correctness of the calculation program was verified, and the sensitivity analysis was carried out on the partition number of shuttle louvers. Analysis results show that the relative error rate decreases with the segments, but changes no more if the partition number is over 8. Finally, a comparative study of the error by the proposed method and that by traditional methods with flat hypothesis model shows there exist the error increases with the tilt angle.