Researchers simulated 160 cases of PV roofing installation in South and North -Italia. Among changing parameters were the size and type of panels, as well as their roof coverage. The albedos considered were 20%, 40%, 60%and 80%, which represent different types of roof materials.
A research group led by the Italian University of Calabria has investigated the impact of Albedo on PV current generation on the roof and has discovered that the reflection of the output radiation from the solar panel surfaces to the back of adjacent modules plays an important role in raising the yield of the Zonne -Electricity.
“The current study is investigating the performance of monofacial and bifacial solar panels on different roof typologies with variable installation patterns and albedos. In this respect, the comparison will help understand how Dakalcedo influences annual energy production, the most suitable way to set up solar panels on the roof -and the distinction between – -the distinction between -and the distinction between – – -distinction – – -distinction – – -distinction – – – -distinction – – -distinction – – – -distinction – – -distinction – – – -distinction – – – – – -Solar’s -distinction – – – – – – -Solar ,’s -distinction. -Solar -Solar -Solar -Solar -Solar -Solar -Solar -Solar -solar -solar -solar -solar -solar -solar -solar -solar -solar -nichters, said the evaluation. “
With the help of two case studies from Italy – one from the south and the other from the north of the country – the team concentrated its work on the various Albedo effects in different installation patterns.
All simulations were made on a roof of 10 mx 10 m, with a total area of 100 m². Milan was chosen as the location of the simulations of Noord -Italia, with an annual average temperature of 13.5 ° C annual global irradiation of 1,317 kWh/m2 and a tilt of 39 °, while Cosenza was taken as the South Case Study, with an annual average radio of ° C, annual worldwide global global worldwide. °.
The experiments include two PV system sizes – 1 mx 1.5 m or 1 mx 2 m – with 10%, 20%, 30%, 40%or 50%of the roof. Two types of PV panels were considered: a bifacial monocrystalline panel with 20% efficiency or a monofacial monocrystalline panel with 20% efficiency. The albedos considered were 20%, 40%, 60%and 80%, which represent different types of roof materials.
“In the limited area of a roof, by increasing the number of PV modules, the annual energy production can increase to a certain value, and then it can decrease as a result of the higher shade frequency of solar panels on the surface of other solar panels,” the scientists emphasized. “In this study, in southern and north-Italy, it happened after increasing the number of modules of 40-50% of the roof area coverage.”
According to the group, the improved bifacial output appears to be activated at this speed by radiation reflection from the solar panel surfaces to the back of adjacent modules, instead of the albedo of the roof. The choice between monofacial and bifacial solar panels also turned out to be dependent on the coverage percentage of the solar panels on the roof.
“It can be concluded that with low coverage percentages of PV panels on the roof surface, the installation of bifacial panels does not seem to be beneficial from the perspective of energy production,” the group added. “In a higher coverage percentage of approximately 50%, and because of the simultaneous effects of roof album and reflection of solar panels, it is cheaper to use bifacial solar panels, as in the case of Italy, energy production has increased to 18%.”
The research work was presented in “Unveiling the impact of Albedo on the potential of the power generation of the solar panel in various installation patterns: Case Study of ItalyPublished In energy reports. Scientists from the Aristotle University of Thessaloniki van Greece also participated in the study.
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