An Indian-British research team has developed a building-integrated linear concentrating PV façade by an asymmetrical composite parabolic concentrator, perc cells and encapsulation layers between two glass sheets in Sandwichen. The system was tested under both indoor and outdoor conditions and its payback time turned out to be a maximum of 11 years.
Researchers from India and the United Kingdom have developed a new smart solar facade with linear concentrating PV and PERC sun cells.
“Our work introduces a linear concentrating photovoltaic (BilCPV) facade system that is easy to produce using extrusion and cheap optical materials,” said the corresponding author Hasan Baig told PV Magazine. ‘In contrast to conventional buildings integrated photovoltaic (BIPV), our design combines electricity generation with daylight potential, which can make facades multifunctional energy systems that can simultaneously contribute to electricity, passive lighting and sustainability goals. “
The BilCPV has an optical element (asymmetric compound parabolic concentrator (ACPC), which leads the light to the perc cells. It was specifically designed for a 10 mm wide, 120 mm long silicon solar cell, with semi -acceptance corners of 0 ° and 40 °. which means that a double window is met.
“To meet the integration of a double glazed window, the optical element is cut, which limits the height to 20 mm while retaining a concentration ratio of 2.5 ×. This compact, efficient design maximizes solar recording and daylight in building applications,” the group explained. “The change in acceptance angle as a result of truncation, which would then be 0 as much and 75), so that the prison rays can be conquered during the summer months.”
The new device was tested in a control lab, under standard 1-Sun conditions using an AAA class continuous solar simulator. It was then also tested under the real outdoor conditions of London. Electric measurements were registered using a calibrated data acquisition system linked to the electrical terminals of the module. The device was compared with a reference of a bare module.
Under standard test conditions of 1,000 W/m2 and 25 ° C, the BilCPV module showed an increase of 132% in short-circuit current compared to the bare module. Thermal simulations and experimental validation showed that cell temperatures varied from 308 k to 339 K. What for the outside test the peak power reached 1.43 W around the solar afternoon less than 700 W/m2.
“In London, lower solar radiation results in moderate energy output and a payback time of approximately 11 years,” the group concluded. “Delhi and Dubai, with a higher radiation, show better energy yields, shorter payback time (2.9-3.6 years) and substantial durability effects, including carbon saving up to 1.7 tons per square meter for 25 years.”
The system was introduced in “Smart solar competition with linear concentrating photovoltaisies: design, testing, economic and sustainability assessmentPublished In technologies and assessments of sustainable energy. Researchers from Enphase Energy and the University of East Londs in the United Kingdom participated in the research.
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