针对液滴和玻璃层的太阳辐射传递特点,提出附着液滴玻璃层的太阳辐射传递模型。将入射的太阳辐射进行直散分离,基于蒙特卡洛射线追踪法对直射辐射光学性能进行计算,同时将入射角进行离散,分别在各角度范围内采用蒙特卡洛射线追踪法的直射辐射原理计算散射辐射光学性能。为了对模型进行验证,通过实验测试液滴覆盖率和太阳入射角对附着液滴玻璃层光学性能的影响,并与模型计算结果进行比较。结果表明：实验结果与计算结果差别较小,总透过率最大误差仅约为0.05,模型的准确性较高。附着液滴的玻璃层能有效降低太阳辐射透过率,且太阳辐射透过率随液滴覆盖率的增大而减小,随入射角的增大而减小。
Abstract
A solar radiation transmission model with droplets attached to the glass layer is proposed based on characteristics of solar radiation transmission between droplets and the glass layer. The incident solar radiation is splitted into the direct radiation and the diffuse radiation parts, and the Monte Carlo ray tracing method is used to calculate the transmittance, reflectance and absorptance of the glass layer with attached droplets. At the same time, the incident angle is divided into sub-angles, and the Monte Carlo ray tracing method is used to calculate the optical performance of the diffuse radiation in each sub-angle. In order to verify the proposed model, the effect of the droplet coverage and the solar incident angle on the optical performance of the glass layer with attached droplets was tested experimentally, and the measured results and the calculated results are compared. The results show that the difference between the experimental results and the calculated results is small. The maximum error of the total transmittance is only about 0.05, and the model has high accuracy. The droplets attached to the glass layer can effectively reduce the solar radiation transmittance, which decreases with the increase of the droplet coverage and the incident angle.
关键词
玻璃 /
液滴 /
太阳辐射 /
蒙特卡洛方法 /
建筑能耗
Key words
glass /
droplet /
solar radiation /
Monte Carlo method /
building energy consumption
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基金
国家自然科学基金（52068021）; 江西省自然科学基金（20202BABL204060）; 江西省教育厅科技项目（GJJ190301）
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