The irradiance of solar radiation in a greenhouse with a complex structure was calculated using a diagram for sky view factor (DSVF) and compared with observed values. Structural materials (such as side pillars and rafters) and non-structural materials (such as lock channels, door frames, and ventilation fans) were treated as sunshine obstacles, including lower rafters and equal leg angles in the inner spaces of the greenhouse. Radiation directions simulated using a DSVF were used for calculating the irradiance of diffuse solar radiation. With respect to the irradiance of total solar radiation on a sunny day, the calculated values were found to be higher than the observed values early in the morning. However, the overall fluctuation due to diurnal change of the solar elevation and in the sharp drops due to the sunshine obstacles were reproduced. Furthermore, the diurnal changes of the irradiance of non-direct solar radiation on a sunny day and the irradiance of total and non-direct solar radiations on a cloudy day could also be reproduced. The relative error of the calculated irradiance of daytime (from 04 :00 to 20 :00) total and non-direct solar radiations to the measured value was 4.3% for the total radiation on the sunny day, 5.5% for the non-direct radiation on the sunny day, -1.1% for the total radiation on the cloudy day, and 0.3% for the non-direct radiation on the cloudy day. The results of this study indicated that the DSVF can be useful for calculating diffuse solar radiation.

中文翻译：

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使用天空视角系数图计算具有复杂结构的温室中太阳辐射的辐照度

使用天空视野因子 (DSVF) 图表计算具有复杂结构的温室中太阳辐射的辐照度，并与观测值进行比较。结构材料（如侧柱和椽）和非结构材料（如锁槽、门框和通风扇）被视为阳光障碍，包括温室内部空间的下椽和等腿角。使用 DSVF 模拟的辐射方向用于计算漫射太阳辐射的辐照度。对于晴天太阳总辐射的辐照度，发现计算值高于清晨的观测值。然而，由于太阳高度的昼夜变化引起的整体波动和由于阳光障碍引起的急剧下降被再现。此外，还可以再现晴天非直接太阳辐射辐照度和阴天太阳总辐射辐照度和非直接太阳辐射辐照度的日变化。日间（04:00-20:00）总辐射和非直接太阳辐射的计算辐照度与实测值的相对误差为晴天总辐射4.3%，非直接辐射5.5%晴天，阴天总辐射为-1.1%，阴天非直接辐射为0.3%。这项研究的结果表明，DSVF 可用于计算漫射太阳辐射。日间（04:00-20:00）总辐射和非直接太阳辐射的计算辐照度与实测值的相对误差为晴天总辐射4.3%，非直接辐射5.5%晴天，阴天总辐射为-1.1%，阴天非直接辐射为0.3%。这项研究的结果表明，DSVF 可用于计算漫射太阳辐射。日间（04:00-20:00）总辐射和非直接太阳辐射的计算辐照度与实测值的相对误差为晴天总辐射4.3%，非直接辐射5.5%晴天，阴天总辐射为-1.1%，阴天非直接辐射为0.3%。这项研究的结果表明，DSVF 可用于计算漫射太阳辐射。