How to ensure the safety of the photovoltaic stents used
Photovoltaic power generation is the main principle of the photoelectric effect of the semiconductor. Photons illuminate to metal, its energy can be absorbed by all metal in an electronic, electronic absorption energy is enough big, can overcome the metal work of internal force, escape from the metal surface
photovoltaic power generation is the main principle of the photoelectric effect of the semiconductor. When photons illuminate metal, its energy can be absorbed by the electrons in a metal completely. Electronic absorption energy is enough big, can overcome the internal force of the metal work, and escape from the metal surface become photoelectron. The silicon atoms has four external electronic. If pure silicon doped with five external electron atoms, such as phosphorous, it becomes a kind of n-type semiconductor. If pure silicon doping has three external electron atoms, such as boron atoms, p-type semiconductors are formed. When the P and N together, contact surface will form a potential difference, become a solar cell. When sunlight to pn junction, an empty hole from polar mobile P to N poles, electrons from N polar moved to P polar, form a current. The photoelectric effect refers to the semiconductor lighting in uneven or between different parts of the combination of semiconductor and metal to produce the phenomenon of electric potential difference. First of all, this is a photon ( Light waves) Into electronic, the process of convert light energy into electrical energy. Second, it is a process of voltage form. Polycrystalline silicon ingot casting, broken made silicon ingot and slice for processing. Silicon doping trace boron and phosphorus diffusion photovoltaic power generation. Photovoltaic sketch is a p-n junction. Then using screen printing will be good silver paste printing in grid line is formed on the silicon wafer, sintering, making the back electrode at the same time, the surface coated with a layer of the grid line antireflective coating, made into cell. Cells are arranged and combined into battery components to form a large circuit board. Usually, the aluminum frame wrapped around the component, the side covered with glass, the back is equipped with electrodes. Use battery components and other auxiliary equipment, power generation system can be formed. To convert direct current into alternating current (ac), the need to install a converter. After power generation, can through the battery storage or enter the public power grid. Battery components accounted for about 50% of the cost of power generation system, and current transformer, installation expenses and other auxiliary components and other fees for the other part. In the process of construction and maintenance, to ensure safe use of solar photovoltaic stents is our top priority, especially when it carries extremely expensive equipment. 1. First, the construction must be on the installation position of solar photovoltaic power generation set, environment factors, such as strict test and design. When make an estimate, we must consider carefully and consider all possible situation. Only in this way can we secure. 2. Solar photovoltaic stents fear most is a bad weather, rain, snow and high winds. We should give full consideration to the rain intensity and corrosion degree, under the condition of job, try your best to choose the most suitable for the local environment of the material. 3. Every link in the process of reconstruction, carefully check. Should check carefully whether the robustness of photovoltaic stents and insulation damage. There should be no hidden dangers. 4. Standards for pv stent system maintenance, regular solar photovoltaic stents for all aspects of maintenance and maintenance, inspection is damaged, and follow up in time.