The main advantage of photovoltaic solar power generation is that solar cells can be installed in rooms that are not normally used, such as roofs, without noise, long life, and almost no adjustment is needed once they are set. As long as the roof is filled with solar cells, self-sufficiency in electricity at home can be achieved. What is the working principle of photovoltaic solar power ? Is photovoltaic power not good? We then look down.
First, the principle of photovoltaic power generation Photovoltaic power generation, the basic principle is the "photovoltaic effect." When a photon strikes a metal, its energy can be fully absorbed by an electron in the metal. The energy absorbed by the electron is large enough to overcome the metal's internal gravitational force and cause it to escape from the metal surface and become photoelectron.
Illumination creates a potential difference between different parts of a non-uniform semiconductor or semiconductor and metal. It is firstly a process in which photons (light waves) are converted into electrons, and light energy is converted into electrical energy. Second, it is the process of voltage formation. With voltage, it's like building a dam. If there is a connection between the two, it will form a current loop.
The main principle of photovoltaic power generation is the photoelectric effect of semiconductors. The silicon atom has 4 electrons. If 5 atoms of electrons, such as phosphorous atoms, are incorporated in pure silicon, they become negatively charged N-type semiconductors; if 3 atoms of electrons, such as boron atoms, are incorporated into pure silicon, A positively charged P-type semiconductor is formed. When the P-type and the N-type are combined together, the contact surface forms a potential difference and becomes a solar cell. When sunlight hits the P-N junction, holes move from the N-pole region to the P-pole region, and electrons move from the P-pole region to the N-pole region, forming a current.
Second, photovoltaic solar power is good
advantage:
1. Solar energy is inexhaustible. The solar radiation received by the Earth's surface can meet 10,000 times the global energy demand. As long as solar photovoltaic systems are installed in the 4% of the world's deserts, the generated electricity can meet the needs of the world. Solar power is safe and reliable, and will not suffer from energy crisis or fuel market instability;
2, solar energy can be everywhere, can be near the power supply, do not have long-distance transmission, to avoid the loss of long-distance transmission lines;
3, solar energy does not use fuel, the operating cost is very low;
4. There is no moving parts for solar power generation and it is not easy to use damage. It is easy to maintain and is especially suitable for use under unattended conditions.
5, solar power will not produce any waste, no pollution, noise and other public hazards, no adverse impact on the environment, is an ideal clean energy;
6. The construction period of the solar power system is short, convenient and flexible, and it is possible to add or reduce the capacity of the solar array arbitrarily according to the increase or decrease of the load and avoid waste.
Disadvantages:
1. There is intermittent and random nature on the ground. The amount of power generation is related to climatic conditions. In the evening or on rainy days, it is impossible or very little to generate electricity.
2. The energy density is relatively low. Under standard conditions, the intensity of solar radiation received on the ground is 1000 W/M^2. When used in large format, it takes up a large area;
3, the price is still relatively expensive, 3 to 15 times the conventional power generation, the initial investment is high.
Xiao Bian concludes: We have introduced photovoltaic solar power generation for everyone well, and hope to be helpful to everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will present more exciting content for everyone.
First, the principle of photovoltaic power generation Photovoltaic power generation, the basic principle is the "photovoltaic effect." When a photon strikes a metal, its energy can be fully absorbed by an electron in the metal. The energy absorbed by the electron is large enough to overcome the metal's internal gravitational force and cause it to escape from the metal surface and become photoelectron.
Illumination creates a potential difference between different parts of a non-uniform semiconductor or semiconductor and metal. It is firstly a process in which photons (light waves) are converted into electrons, and light energy is converted into electrical energy. Second, it is the process of voltage formation. With voltage, it's like building a dam. If there is a connection between the two, it will form a current loop.
The main principle of photovoltaic power generation is the photoelectric effect of semiconductors. The silicon atom has 4 electrons. If 5 atoms of electrons, such as phosphorous atoms, are incorporated in pure silicon, they become negatively charged N-type semiconductors; if 3 atoms of electrons, such as boron atoms, are incorporated into pure silicon, A positively charged P-type semiconductor is formed. When the P-type and the N-type are combined together, the contact surface forms a potential difference and becomes a solar cell. When sunlight hits the P-N junction, holes move from the N-pole region to the P-pole region, and electrons move from the P-pole region to the N-pole region, forming a current.
Second, photovoltaic solar power is good
advantage:
1. Solar energy is inexhaustible. The solar radiation received by the Earth's surface can meet 10,000 times the global energy demand. As long as solar photovoltaic systems are installed in the 4% of the world's deserts, the generated electricity can meet the needs of the world. Solar power is safe and reliable, and will not suffer from energy crisis or fuel market instability;
2, solar energy can be everywhere, can be near the power supply, do not have long-distance transmission, to avoid the loss of long-distance transmission lines;
3, solar energy does not use fuel, the operating cost is very low;
4. There is no moving parts for solar power generation and it is not easy to use damage. It is easy to maintain and is especially suitable for use under unattended conditions.
5, solar power will not produce any waste, no pollution, noise and other public hazards, no adverse impact on the environment, is an ideal clean energy;
6. The construction period of the solar power system is short, convenient and flexible, and it is possible to add or reduce the capacity of the solar array arbitrarily according to the increase or decrease of the load and avoid waste.
Disadvantages:
1. There is intermittent and random nature on the ground. The amount of power generation is related to climatic conditions. In the evening or on rainy days, it is impossible or very little to generate electricity.
2. The energy density is relatively low. Under standard conditions, the intensity of solar radiation received on the ground is 1000 W/M^2. When used in large format, it takes up a large area;
3, the price is still relatively expensive, 3 to 15 times the conventional power generation, the initial investment is high.
Xiao Bian concludes: We have introduced photovoltaic solar power generation for everyone well, and hope to be helpful to everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will present more exciting content for everyone.
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