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A Comparison Study of the Performance of South/North-facing vs East/West-facing Bifacial Modules under Shading Conditions

机译:遮阳条件下南方/朝北与东/西部双面模块性能的比较研究

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Horizon obstructions can decrease the diffuse and direct light received by photovoltaic (PV) modules. In this paper, we compare the performances of the two bifacial PV system orientations: optimally tilted facing south/north (Bi_(s/n)), and vertically installed facing east/west (Bi_(e/w)) under no-shading and shading conditions. We considered multiple locations with different latitudes and weather types and observed that without any horizon obstructions, Bi_(s/n) outperforms Bi_(e/w) for most locations. However, certain types of obstructions cause Bi_(e/w) to have higher energy yield than Bi_(s/n). For sunnier and lower latitude locations such as Albuquerque, NM, a very large obstruction at south causes this result. On the other hand, for higher latitude locations (e.g. Anchorage, AK), much smaller obstructions at south is enough to have higher energy yield for Bi_(e/w) than Bi_(s/n). Under certain shading conditions Bi_(e/w) produces up to 75 kWh/year more energy than Bi_(s/n).
机译:地平线障碍物可以降低光伏(PV)模块接收的漫反射和直接光。在本文中,我们比较了两种双相PV系统方向的性能:面向南/北面的最佳倾斜(Bi_(S / N)),并在无阴影下垂直安装(Bi_(E / W))和阴影条件。我们考虑了具有不同纬度和天气类型的多个位置,并且观察到没有任何地平障碍物,Bi_(S / N)优于大多数位置的Bi_(E / W)。然而,某些类型的障碍物导致Bi_(E / W)具有比Bi_(S / N)更高的能量产量。对于Sunnier和较低的纬度地点,如Albuquerque,NM,南方的非常大的阻塞导致这一结果。另一方面,对于更高的纬度位置(例如锚,AK),南部的较小障碍物足以对Bi_(E / W)具有比Bi_(S / N)更高的能量产量。在某些阴影条件下,Bi_(E / W)产生高达75千瓦时/年的能量比Bi_(S / N)更高。

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