Unlike the traditional silicon crystal and thin film type, the most obvious advantage of the concentrator photovoltaics (HCPV) technology is its high photoelectric conversion efficiency. When the solar cell chip focuses on the solar light 500 times, its photoelectric conversion efficiency is between 36-40%, and the efficiency of the photoelectric module is between 22-28%. The system is 18-20% effective. In terms of annual power generation, under the same conditions, the system (combined with the biaxial tracking technology) is about 1.2-1.4 times of the traditional silicon crystal type, which is the competitive advantage of HCPV technology. HCPV technology is most suitable for large power plants, especially in sunny, dry and low humidity areas.
At present, the development and manufacture of the core technology of HCPV - triple junction compound battery and high concentrator photovoltaics technology has broken through the blockade of foreign enterprises. At present, the large-scale production enterprises in China have the daily core photovoltaic of San'an photoelectric company, which has achieved 1000 times of concentration and more than 40% photoelectric conversion efficiency.
The company has participated in the formulation of certification technical specifications for design and identification of concentrator photovoltaics modules and modules in China. In order to pass this certification, the company has passed the certification links of application, sample delivery, type test, factory inspection, qualification evaluation and certification, It also accumulated valuable experience for the quality certification of the PV module in the future.
On the premise of comprehensive consideration of performance and cost, different concentrators, gaas solar cells and tracking systems are adopted for engineering design according to the needs to form a concentrator photovoltaics system.
Among them, heat dissipation is a priority factor, because the solar light will form a very high temperature on the surface of the multi junction solar cell. If the triple junction solar cells can not be cooled in time, the photoelectric conversion efficiency will be greatly affected, and even the solar cells will be burned. There are two ways of heat dissipation: active heat dissipation and passive heat dissipation. There are also many designs that use the active heat dissipation to develop the combined use of heat and electricity, so as to better improve the utilization efficiency of solar energy. The research on the application of heat dissipation technology is generally based on the technology accumulated in the previous research on the heat dissipation of semiconductor chips. The reliability and maintainability of the system are also important factors to be considered. If the design is improper, the later operation cost may even exceed the earlier system purchase cost