Tag Archive for: pvsystem

New testing conducted at France’s oldest PV system have shown that its solar modules can still provide performance values in line with what the manufacturers promised.

Solar modules deployed in France in 1992 still provide 75.9% of original output power

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French association Hespul was created in 1991 to set up the first photovoltaic plant connected to the national network in France. Following the inauguration of the Phébus 1 power plant on June 14, 1992 in Ain, Hespul decided to expand its activity to promote photovoltaics in France, which at the time was almost non-existent.

The association has now revealed that around 10 m2 of the panels, corresponding to around 1 kW, were dismantled from the system last year and submitted to a series of tests according to the international standards.

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Source: PV Magazine

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Elevated metro stations may highly benefit from rooftop solar power generation combined w/ battery storage, new research from China suggests.

Photovoltaics for elevated metro stations

Researchers from the Xi’an Jiaotong University in China have investigated how rooftop solar and battery storage may help cover energy demand in elevated metro stations and found this combination may achieve a self-sufficiency rate of up to 54% and a payback time of 10.2 years.

“Our work is the first study focusing on the PV potential of elevated subway stations based on real energy loads,” the research’s lead author, Haobo Yang, told pv magazine. “Our findings are based on measured hourly load demands and include the impact of battery energy storage on PV system performance.”

In the study “Technoeconomic analysis of rooftop PV system in elevated metro station for cost-effective operation and clean electrification,” published in Renewable Energy, Yang and his colleagues said their work is intended to provide a benchmark for cost-effective operation and clean electrification in urban metro networks.

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Source: PV Magazine

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Scientists in the Netherlands have assessed how the so-called blue-green roofs can help reduce the operating temperature of rooftop PV panels and have found they provide a significant cooling effect.

Well-irrigated roofs with vegetation have cooling effect on PV systems

A research group led by the Netherlands’ Water Research Institute has investigated how a blue-green roof (BGR) may act as a cooling agent for rooftop PV systems and has found that this kind of roof may lower the roof surface temperature by up to 4.64 C compared to a conventional bitumen roof (BiR).

Blue-green roofs are roofs that use “green” technologies, such as lateral drainage and irrigation for plant and crop growth, as well as “blue” technologies like rainwater storage and dosage.

The scientists conducted a series of tests on a PV system installed on a so-called constructed wetroof in an apartment building in Amsterdam. Constructed wetroofs are roofs that use natural processes involving wetland vegetation, soils, and their associated microbial assemblages to improve water quality. The irrigation system used for the research project relies on an additional water supply sourced from grey water from showers that is transformed into irrigation water.

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Source: PV Magazine

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