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Investigation Of Wind Loading Characteristics And Prediction Models Of Roof-mounted Solar Arrays On Tall Buildings

Posted on:2022-04-15Degree:MasterType:Thesis
Country:ChinaCandidate:Z D LiFull Text:PDF
GTID:2492306569998789Subject:Architecture and Civil Engineering
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Solar energy is becoming more and more popular as a kind of high-quality renewable energy.This study intends to investigated the wind load characteristics of solar arrays installed on the roof of tall buildings through wind tunnel tests.In this study,wind load of standalone solar panels and solar arrays installed on roofs of tall buildings were eaxmined by wind tunnel test.Firstly,the influence of tilt angle,installation location and size of panel on wind loads of standalone solar panels were studied.Then,the effect of the two panel parameters,i.e.,tilt angle and distance between arrays,and three building parameters,i.e.,parapet height,aspect ratio and side ratio,on wind load of solar arrays were analyzed.In addition,the wind loads on solar arrays were compared with that of standslone solar panels to analyze the interference effect between solar arrays.In this study,the area-average force coefficients was used to represent the wind load,and the module force coefficients and the panel force coefficients were corresponding the different tributary areas.It was found that the influence rule of all parameters on the module force coefficients and panel force coefficients was roughly the same.Firstly,the parameters of standalone solar panels were studied.For standalone solar panels installed at the roof center,the wind loads near roofs edges were greater than that away from roofs edges.The most critical negative peak panel force coefficients at 30° were slightly greater than that at the other two tilt angles.It was found that the maximum and minimum negative peak module force coefficients all appeared in the northern row close to roof edges.This was due to that the modules in the northeast roof edges were most affected by the conical vortices formed at the northeast winds.As the vortex developed,the local flow was parallel to the surfaces of the internal module,the wind load is reduced.Then,the parameters of solar arrays were studied.Based on the study of standalone panels,it was found that the interference effect between solar arrays were mainly attributed to the shielding effects of upstream panels on downstream panels.The solar panels located in the roof center were subjected to the largest interference effect,and the most critical negative peak module and panel force coefficients were significantly reduced compared with that of standalone panels.As the northernmost row of panels located upstream of the most unfavorable northeast winds,the interference effect were minimal.The most critical negative peak area-average force coefficients of the solar arrays increased with the increase of the tilt angle.This was due to that the larger turbulence was induced at the larger tilt angle.With the increase of distance between arrays,the most critical most critical negative peak area-average force coefficients of the solar panels in the middle row increased obviously.This was due to that increasing the distance between arrays would reduce the interference effects.The most critical negative peak nodule force coefficients of the solar panels close to the roof center increased with the increase of the parapet height within a certain range.But the most critical negative peak area-average force of the solar arrays decreases with the increase of the height of the parapet.With the increase of the aspect ratio,the most critical negative peak area-average force coefficients of the solar panels increased slightly.The most critical negative peak area-average force coefficients of the solar panels with the side ratio of 1 is slightly larger than that with the other two side ratios.The effects of aspect ratio and side ratio were significantly smaller than those of other factors.With considerations of the effects of the above parameters,the prediction model of for the negative peak pressure coefficients of the solar arrays is was established based on the SEAOC standard.
Keywords/Search Tags:wind tunnel test, solar arrays, high-rise buildings, wind load, negative peak pressure, prediction model
PDF Full Text Request
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