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The bright side of PV production in snow-covered mountains
摘要： Our work explores the prospect of bringing the temporal production profile of solar photovoltaics (PV) into better correlation with typical electricity consumption patterns in the midlatitudes. To do so, we quantify the potential of three choices for PV installations that increase production during the winter months when electricity is most needed. These are placements that favor (i) high winter irradiance, (ii) high ground-reflected radiation, and (iii) steeper-than-usual panel tilt angles. In addition to spatial estimates of the production potential, we compare the performance of different PV placement scenarios in urban and mountain environments for the country of Switzerland. The results show that the energy deficit in a future fully renewable production from wind power, hydropower, and geothermal power could be significantly reduced when solar PV is installed at high elevations. Because the temporal production patterns match the typical demand more closely than the production in urban environments, electricity production could be shifted from summer to winter without reducing the annual total production. Such mountain installations require significantly less surface area and, combined with steeper panel tilt angles, up to 50% of the winter deficit in electricity production can be mediated.
关键词： panel tilt,seasonal energy gap,renewable energy,photovoltaic,surface reflectance
更新于2025-09-23 15:23:52
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Numerical investigation of wind influences on photovoltaic arrays mounted on roof
摘要： The wind-induced response of photovoltaic (PV) panel installed on building roof is influenced by the turbulence induced by the pattern of both panels and roofs. Different roof types cause different flow patterns around PV panels, thus change the flow mechanism exerted on PV panels. In this study, the effects of roof types, heights and the PV array layouts on the net wind loads of the PV panel is investigated. The software Fluent is adopted and the three-dimensional Reynolds-averaged Navier–Stokes (RANS) method is used for numerical analysis. The rationality and accuracy of the numerical results obtained from the current study are verified through comparison with the results of wind tunnel experiments. The maximum wind uplift on the PV panels increases with the panel tilt angle for two types of roofs, but decreases with the increase of the PV array edge setback. Moreover, the maximum wind uplift also increases with the roof clearance within a certain range. Both the row spacing of PV array and the building height have a great effect on the maximum aerodynamic uplift for gable roofs, whereas both of them have slight influence for flat roofs.
关键词： Roof photovoltaic array,roof type,wind pressure coefficient,Reynolds-averaged Navier–Stokes simulation,edge setback,PV panel tilt angle
更新于2025-09-12 10:27:22