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Prototype of the concentrating roof solar power system
Lu Hui, general manager of Wuhan Bosun Energy Technology Co., Ltd. and associate professor at Hubei University of Technology, explained that this technology differs from traditional solar cells. Instead of using standard photovoltaic cells, it employs plane Fresnel lenses to concentrate sunlight onto a new type of multi-junction gallium arsenide cell. This cell is just 1/1000 the size of a conventional crystalline silicon cell but produces twice the power output.
According to Lu, the new material achieves a sunlight utilization rate of 44%, with an actual conversion efficiency of 31%—far surpassing the typical 20% efficiency of standard photovoltaic materials.
During the visit, the reporter observed a demonstration unit installed on the university's rooftop. The device has a light collection area of six square meters and can generate 1,000 watt-hours of electricity. The system requires only half the space of a conventional crystalline silicon system and is ideal for urban buildings with limited roof space. Additionally, its cost is significantly lower than traditional solar systems.
Lu also mentioned that the company has filed six invention patents. The exhibition prototype has resolved previous issues with top-heavy concentrating systems. The newly designed system uses a polar axis tracking method, requiring only a small daily adjustment in the north-south direction. For east-west movement, a linkage drive mechanism is used, resulting in a more compact, lightweight, and stable system.
Li Ziqiang, dean of the School of Science at Hubei University of Technology, stated that the university and the company have established a joint photovoltaic engineering application research center. They are also in discussions to enter the Hugong University Science and Technology Industrial Park, aiming to turn this project into a key example of the industrialization of academic research achievements. (Reporter: Zhou Shuchun, Correspondent: Yang Shuo)