Solar power is called the best new energy source. Solar power has no danger of exhaustion; it is safe, reliable, non-noisy and non-pollution, absolutely clean (no pollution); it is not limited by the geographical distribution of resources; it can take advantage of building roofs; it can be used without fuel and erection of transmission lines. Power generation and power supply; high energy quality; users are emotionally easy to accept; short construction periods and short energy acquisition time. The following small series introduces the principle of solar power generation and the role of various parts of solar energy.
Solar power generation principle
1. Light-heat-moving-electricity conversion methods generate electricity by utilizing the heat energy generated by solar radiation. Generally, solar energy collectors convert the absorbed thermal energy into working fluid vapor, and then drive the turbine to generate electricity. The former process is the light-heat conversion process; the latter process is the conversion from thermal-dynamic to electrical final conversion, just like ordinary thermal power generation. The disadvantage of solar thermal power generation is its low efficiency and high cost, and its investment is estimated. At least 5 to 10 times more expensive than ordinary thermal power plants.
2. Light-electricity direct conversion method This method utilizes the photoelectric effect to directly convert solar radiation energy into electric energy. The basic device for light-electricity conversion is a solar cell. A solar cell is a device that converts solar energy directly into electrical energy due to the photovoltaic effect. It is a semiconductor photodiode. When the sun shines on a photodiode, the photodiode turns the light energy of the sun into electricity. Current. When many batteries are connected in series or in parallel, they can become a solar cell array with relatively large output power. Solar cells are a promising new type of power supply. They have three advantages: permanent, cleanliness and flexibility. Solar cells have a long lifespan. Solar cells can be used once for long-term use as long as the sun is present; compared with thermal power generation, Solar cells do not cause environmental pollution.
The role of various parts of solar energy
1. Solar panels: Solar panels are the core part of solar power systems and the most valuable part of solar power systems. Its role is to convert the sun's radiant power into electrical energy, or send it to a storage battery, or push a load to work.
2. Solar controller: The function of the solar controller is to control the working status of the entire system and play the role of overcharge protection and over-discharge protection of the battery. In areas with large temperature differences, qualified controllers should also have temperature compensation. Other additional functions such as light-controlled switches and time-controlled switches should be optional for the controller.
3, storage battery: generally lead-acid batteries, small micro-systems, but also available nickel-metal hydride batteries, nickel-cadmium batteries or lithium batteries. Its role is to store the electric energy emitted by the solar panel when there is light, and release it when needed.
4. Inverter: The direct output of solar energy is generally 12VDC, 24VDC, and 48VDC. In order to supply electric energy to 220VAC electric appliances, it is necessary to convert the DC electric energy generated by the solar power generation system into AC electric energy, and therefore it is necessary to use a DC-AC inverter. Efficiency is one of the important criteria when choosing an inverter. The higher the efficiency, the less the power loss in the process of converting the direct current generated by the photovoltaic components into alternating current. It can be said that the quality of the inverter determines the efficiency of the power generation system, which is the core of the solar power system.
Solar panel advantages
Solar panels are permanent, clean, and flexible. Although they are not yet popular, they are still promising. Solar panels have a long life, so long as there is a sun, it can be used for long-term investment. Compared with firepower and nuclear power generation, solar panels are more environmentally friendly and energy-saving; and solar panels can be used in large, medium, and small scales, with medium-sized power plants of up to one million kilowatts. Small solar cells are only used for one household. These are the advantages that other power sources cannot match.
Editor's summary: The principle of solar power generation and the role of various parts of solar energy are introduced here. I hope to help everyone. If you want to know more about yourself, you can follow the information on this site.
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