In the face of global warming and air pollution, China vigorously supports the development of rooftop solar power industry. Many companies, institutions and individuals have begun to install solar power equipment on the roof.
Solar energy resources have no geographical restrictions, are widely distributed and inexhaustible. Therefore, compared with other new power generation technologies (wind power generation and biomass power generation, etc.), rooftop solar photovoltaic power generation is a renewable energy power generation technology with ideal characteristics of sustainable development, which has the following advantages:
1. Solar energy resources are inexhaustible and inexhaustible. The amount of solar energy shining on the earth is 6,000 times greater than the energy we currently consume. In addition, solar energy is widely distributed on the earth, and photovoltaic power generation systems can be used only in places with sunlight, regardless of the region, altitude and other factors.
2, solar energy resources are available everywhere, can be nearby power supply. Without long interval delivery, the power loss caused by long interval transmission lines is prevented and transmission costs are reduced. It also provides the premise for the use of solar power systems for home use in western China, where transmission is not convenient.
3, the energy conversion process of rooftop solar power generation is simple, is directly from photon to electron conversion, there is no central process (such as thermal energy conversion to mechanical energy, mechanical energy conversion to electromagnetic energy and mechanical activities, there is no mechanical wear. According to thermodynamic analysis, photovoltaic power generation has a very high theoretical power generation efficiency, which can reach more than 80%, and has great potential for technological development.
4. Rooftop solar power generation itself does not use fuel, does not emit any substances including greenhouse gases and other exhaust gases, does not pollute the air, does not produce noise, is friendly to the situation, will not suffer from the energy crisis or the impact of the fuel market is not constant, is a truly green and environmentally friendly new renewable energy.
5. There is no need for cooling water in the process of rooftop solar power generation, which can be installed on the desolate desert without water. Photovoltaic power generation can also be conveniently connected with the building, forming a photovoltaic construction integrated power generation system, which does not need to occupy an area alone and can throttle precious site resources.
6. Rooftop solar power generation has no mechanical transmission parts, simple operation and maintenance, and constant and reliable operation. A photovoltaic power generation system only needs solar cell modules to generate electricity. Coupled with the widespread use of active control technology, it can fundamentally complete unattended and low maintenance costs.
7. The function of rooftop solar power generation task is constant and reliable, and the service life is more than 30 years. Crystalline silicon solar cells can last 20 to 35 years. In the photovoltaic power generation system, as long as the design is reasonable and the shape is appropriate, the life of the battery can be as long as 10~15 years.
8, solar cell module structure is simple, small volume, light weight, easy to transport and device. The establishment cycle of photovoltaic power generation system is short, and the power load capacity can be large or small, convenient and sensitive, and easy to combine and expand.
Solar power generation is a kind of clean power generation project, which can reduce the environmental pollution caused by coal thermal power generation. With the progress of science and technology, it will gradually become the main form of power generation in the near future.
