Abstract

This study analyses the fluid dynamics of wind loadings on the floating photovoltaic (PV) system using computational fluid dynamics. The two representative models of pontoon-type and a frame-type with a panel angle of 15° to the ground were investigated. The simulation was performed using the steady solver and incompressible Reynolds-Averaged Navier–Stokes equations with a shear stress transport \(k\)–\(\omega\) turbulence model. Inlet condition was 45 m/s steady wind, and outlet condition was set to atmospheric pressure. The results confirmed that wind blowing from the backside of floating PV systems increases drag, lift, and pressure on the first row of the PV panels. The maximum drag and lift coefficient of frame-type PV panels were 0.85 and 0.79, respectively, while that of pontoon-type were 0.81 and 0.65, respectively. The maximum drag and lift coefficient of pontoon-type PV panels with a floating body are 0.29 and 0.25, respectively. Adding the floating body reduced the wind loadings by 70%. Additionally, the blocking back space of the PV panel effectively reduced the maximum drag and lift by 75%, as it prevented the flow impingement.

Graphic abstract

中文翻译：

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浮动光伏系统上风荷载的数值模拟

摘要

本研究使用计算流体力学分析了浮动光伏（PV）系统上风荷载的流体动力学。研究了浮船型和框架型与地面成15°角的两种典型模型。使用稳态求解器和具有切应力传递\（k \） – \（\ omega \）的不可压缩的雷诺平均Navier–Stokes方程进行模拟湍流模型。入口条件为45 m / s稳定风，出口条件设为大气压。结果证实，从浮动光伏系统的背面吹来的风会增加光伏面板第一排的阻力，升力和压力。框架型PV面板的最大阻力和升力系数分别为0.85和0.79，而浮桥型最大阻力和升力系数分别为0.81和0.65。具有浮体的浮箱型PV面板的最大阻力和升力系数分别为0.29和0.25。添加浮体使风荷载减少了70％。此外，PV面板的后退空间有效防止了最大的阻力和提升，降低了75％，因为它可以防止气流撞击。

图形摘要