Wind loading on tilted roof-top solar arrays: The parapet effect

Browne, Matthew T.L.; Gibbons, Mike; Gamble, Scott; Galsworthy, Jon

doi:10.1016/j.jweia.2013.08.013

Cited by 39 publications

(7 citation statements)

References 6 publications

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“…For reducing wind damage to PV systems, it is necessary to estimate the wind loads on PV panels accurately and to evaluate the wind resistant performance of PV systems appropriately. Many researchers have experimentally and/or numerically investigated the wind loads on tilted PV panels installed on the ground [2][3][4][5][6][7][8][9] or on flat roofs of large commercial buildings [10][11][12][13][14][15][16][17][18][19][20][21]. By comparison, only a few investigations have been made of the wind loads on PV panels installed parallel to sloped roofs of residential houses [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Application of a Numerical Simulation to the Estimation of Wind Loads on Photovoltaic Panels Installed Parallel to Sloped Roofs of Residential Houses

Uematsu

Yambe

Yamamoto

2022

Wind

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Many residential houses with sloped roofs are equipped with photovoltaic (PV) systems. In Japan, PV systems are generally designed based on JIS C 8955, which specifies wind force coefficients for designing PV panels. However, no specification is provided to the PV panels installed near the roof edges where high suctions are induced. When installing PV panels in such high-suction zones, we need to evaluate the wind loads on the PV panels appropriately, usually by performing a wind tunnel experiment. However, it is difficult to make wind tunnel models of PV panels with the same geometric scale as that for the building, e.g., 1/100, because the thickness of PV panels and the distance between PV panels and a roof are both several centimeters. Therefore, in the present paper a numerical simulation is applied to the estimation of pressures in the space between the lower surface of PV panels and the roof surface, called “layer pressures”, using the unsteady Bernoulli equation and the time histories of external pressure coefficients obtained from a wind tunnel experiment. An assumption of the weak compressibility of the air and an adiabatic condition is made for predicting the layer pressures from the flow speed through the gaps. The simulation method is validated by a wind tunnel experiment using a model of square-roof building.

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Section: Introductionmentioning

confidence: 99%

Application of a Numerical Simulation to the Estimation of Wind Loads on Photovoltaic Panels Installed Parallel to Sloped Roofs of Residential Houses

Uematsu

Yambe

Yamamoto

2022

Wind

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“…Naeiji [ 14 ] found that for solar panel arrays installed on the roof of residential buildings, the inclination angle is the main factor affecting the wind load on the panels. Matthew [ 15 ] used wind tunnel experiment research to show that the existence of parapet will significantly change the wind field characteristics, and then change the peak wind load on the solar panel. Wang [ 16 ] found through large eddy simulations that in addition to the large‐scale airflow separation and reattachment caused by the building, the local separation in a small range around the solar panel is also an important cause of the peak pressure.…”

Section: Introductionmentioning

confidence: 99%

Wind‐Induced Response and Stow Position Analysis of the Flat Roof Parabolic Solar Collector

et al. 2022

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“…There have been several previous investigations on the roof-mounted solar panels, such as Geurts and Blackmore [1], Brown et al [2], Naeiji et al [3], Cao et al [4], Wood et al [5] and Banks [6]. Wind tunnel tests were conducted on the ground and roof-mounted solar arrays under the effects of spacing parameters on wind loading by Warsido et al [7], who indicated that the moment and force coefficients decreased across the panel rows.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of wind loads on a ground-mounted solar panel of various ground clearances and Reynolds numbers

Yemenici

2021

Sādhanā

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The wind loads on a stand-alone solar panel and flow field behind the panel were experimentally investigated in a wind tunnel under the influence of ground clearance and Reynolds number. The experiments were carried out at the chord Reynolds number of 6.4910 4 , 9.6910 4 , and 1.3910 5 encompassing turbulent flows and dimensionless ground clearance of 0, 0.5 and 0.6. The velocity and turbulence intensities were measured by a constant-temperature hot wire anemometer, and a pressure scanner system was used to static pressure measurements. It was found that the wind loads on the solar panel increased with ground clearance, while changed within a range of the uncertainties of the method with Reynolds number. So, the design-relevant wind loads were independent of the Reynolds number for the present test configurations, but they were significantly affected by the ground clearance. The velocity profiles demonstrated that the length of the recirculation region behind the panel increased with the reduction of the ground clearance, while decreased from the middle of the panel to the near edges, which is consistent with the pressure measurements.

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Wind loading on tilted roof-top solar arrays: The parapet effect

Cited by 39 publications

References 6 publications

Application of a Numerical Simulation to the Estimation of Wind Loads on Photovoltaic Panels Installed Parallel to Sloped Roofs of Residential Houses

Application of a Numerical Simulation to the Estimation of Wind Loads on Photovoltaic Panels Installed Parallel to Sloped Roofs of Residential Houses

Wind‐Induced Response and Stow Position Analysis of the Flat Roof Parabolic Solar Collector

Experimental evaluation of wind loads on a ground-mounted solar panel of various ground clearances and Reynolds numbers

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