The prototype of the system developed by Turkish scientists ran at a lower photovoltaic module temperature and removed most of the dust accumulation. Researchers are now planning to improve the equipment by applying maximum power point tracking (MPPT) converter topology.
The system hosts a polycrystalline module on each of its 10 sites.
Adana University of Technology
Scientists from the Adana University of Technology in Turkey have designed a prototype of a rotating energy system (RES), which they claim may be a solution, particularly suitable for home applications and high-rise buildings in areas with high wind and solar energy. Potential.
“The system is manufactured using 3D printing technology and consists of a single structure,” study author Abdurrahman Yavuzdeger told Photovoltaic Magazine. "The airflow generated by its rotational movement can lower the operating temperature of the solar panel and significantly reduce the accumulation of dust."
The system has a decagonal shape with a polycrystalline photovoltaic panel measuring 140 × 60 × 2.5 mm and weighing only 33 grams on each side. The modules are 30 mm apart from each other, and the power conversion efficiency exceeds 17%. They have a rated voltage of 6V and a rated current of 100mA.
A 95×150 mm air duct is embedded between the 10 sides of the system to reduce the working temperature of the panel and at the same time reduce the working temperature of the entire system. Slip rings with an efficiency of about 96% have been used to solve the problem of cable entanglement in solar modules.
The stepper motor Nema 23 for low-speed applications is used in rotating systems. Its dimensions are 56.4 × 56.4 × 76 mm, and its weight is 1 kg. Its operating voltage is 8.6 V, and each phase operating current is 1 A. The stepper motor driver TB6600 is used for speed adjustment, and the speed is controlled by the controller interface. The speed range of the system is 0 to 100 revolutions per minute (rpm). The measuring station records the ambient temperature and solar radiation data.
The system operates at speeds of 0, 10, 50 and 100 rpm/h, and solar radiation is between 110 and 1210 W/m2. "Although the highest irradiance value is at 10 rpm, the highest power value produced by RES is measured at 100 rpm," the scientists said. "With the increase of the speed, the cooling of the photovoltaic panel is realized."
It is found that the maximum output power of the system is 1.8067 W at 100 rpm and 756 W/m2 solar radiation, and the minimum is 0.5698 W when operating at 10 rpm and 234 W/m2 solar radiation.
“The total cost of the system is about 3,500 lire (A$410),” Yavuzdeger told Photovoltaic Magazine. "But these costs can be traced back to 2018 when we started to assemble the prototype." Looking to the future, the Turkish group expressed its hope to improve the system design and apply the MPPT converter topology to the equipment.
The system is described by its creator as reliable, silent, and environmentally friendly, and it was introduced in the paper "Performance Evaluation of a New Environmentally Friendly Solar Panel Installation Hybrid Rotary Energy System with Renewable Energy Applications" recently published in the IETE Research Journal.
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More articles by Emiliano Bellini
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