000022526 001__ 22526
000022526 005__ 20170724144653.0
000022526 04107 $$aeng
000022526 046__ $$k2017-07-04
000022526 100__ $$aWang, Jingxue
000022526 24500 $$aWind loads on solar arrays mounted on flat roofs

000022526 24630 $$n7.$$p7th European and African Conference on Wind Engineering 
000022526 260__ $$bl'Association pour l'Ingénierie du Vent
000022526 506__ $$arestricted
000022526 520__ $$2eng$$aA series of wind tunnel tests on flat roof-mounted solar arrays have been carried to determine wind-induced loads on panels. The wind direction is defined as 0 degrees when wind flows perpendicularly from higher to lower edges of tilted panels and changes clockwise up to 180 degrees. General characteristics of wind pressures under wind attack angles of 0, 45, 135 and 180 degrees are analyzed in comparison with a flat roof. It is found that the largest negative peak net pressures occur on downstream and upstream panels with wind directions of 0 and 180 degrees respectively. And there is a sharp increase in negative peaks at top taps near the higher edges of these panels. For corner winds, the effects of conical vortices can be recognized from pressure results even if they are deformed by solar panels. And the panels along the wind attack angle experience the largest negative and positive peaks under wind directions of 45 and 135 degrees, which is due to local separation and reattachment induced by the solar panels themselves. Moreover, the effects of side ratio D/B, aspect ratio H/B and parapet height hp with the same roof height are examined because building size is an important parameter affecting wind loads on solar panels, in addition to tilt angle, distance between arrays, panel location and so forth. The results show that the largest peak force coefficient shows an increasing tendency with increase in side ratio and decrease in aspect ratio. Also, the measurements of pressure on solar panels with four parapet heights, 0.3, 0.6, 0.9 and 1.2m, are tested. It turns out that the wind pressures are generally reduced with increase in parapet height except for downstream panels at the wind direction of 180 degrees.

000022526 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022526 653__ $$aWind loads, Wind tunnel tests, Flat roof-mounted solar panels, Side ratio, Aspect ratio, Parapet height

000022526 7112_ $$a7th European and African Conference on Wind Engineering$$cLiège, BE$$d2017-07-04 / 2017-07-07$$gEACWE2017
000022526 720__ $$aWang, Jingxue$$iTamura, Yukio$$iYang, Qingshan
000022526 8560_ $$ffischerc@itam.cas.cz
000022526 8564_ $$s77956$$uhttps://invenio.itam.cas.cz/record/22526/files/45.pdf$$yOriginal version of the author's contribution in proceedings, id 45, section .
000022526 962__ $$r22493
000022526 980__ $$aPAPER