The principle of a solar power plant is as follows:
1. A solar power plant is a device that uses the photoelectric effect of semiconductor materials to convert solar energy into electrical energy. .
2. Thanks to illumination, the more electrons generated in the interface layer, the higher the current.
3. The more light energy the interface layer receives, the larger the surface area of the interface layer battery and the greater the current generated in the solar power plant.
There are two ways to produce electricity in solar power plants. The work processes are:
1. The light, heat, dynamic and electricity conversion method generates electricity using thermal energy. generated by solar radiation. Generally, the absorbed thermal energy is converted into working fluid vapor by the solar collector, then the turbine steam is driven to produce electricity, like ordinary thermal power generation, the disadvantage of solar thermal power generation is its efficiency. is very low and the cost is high, and its investment is 5 times more expensive than ordinary thermal power plants, the advantage is environmental protection.
2. Direct conversion method of light and electricity. This method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the solar cell. A solar cell is a device that directly converts solar energy into electrical energy through the photovoltaic effect. When the sun shines on the photodiode, the photodiode converts light energy from the sun into electrical energy, producing current.
What is the principle of solar energy productione
Principle of solar power generation:
Solar cells use the photoelectric effect of semiconductor materials A device that converts solar energy into electrical energy. The basic process of photovoltaic effect: Assuming that light shines on the solar cell and is accepted at the interface layer, photons with sufficient energy can excite electrons of covalent bonds in P-type silicon and N-type silicon, resulting in the photovoltaic effect. electron generation - Pair of holes.
The electrons and holes adjacent to the interface layer will be separated from each other by the action of the electric field of the space charge before recombination. The electrons move towards the positively charged N region and the holes move towards the negatively charged P region. The separation of charges through the layer of interface will form an outward testable voltage between the P region and the N region.
At this point, electrodes can be added to both sides of the silicon wafer and a voltmeter can be connected. For crystalline silicon solar cells, the typical value of open circuit voltage is 0.5 to 0.6 V. The more electron-hole pairs generated by light illuminating the interface layer, the lower the current is high. The more light energy the interface layer receives, the larger the surface area of the interface layer, i.e. the cell, and the greater the current formed in the solar cell.
Sunlight shines on the p-n junction of the semiconductor, forming new hole-electron pairs. Under the action of the electric field of the p-n junction, holes flow from the n region to the p region and electrons flow from the p region. region to region n When a circuit is connected, a current flowse. This is how photovoltaic solar cells work.nbsp;?With the continuous improvement of modern living standards, the use of nature has also reached its extreme, and the sun has also become the backbone of our lives., the sun is essential in our lives. Whether it is a lighting lamp or a water heater, it has a solar mode. So what is the principle of solar power generation?
Details
01 Solar power generation methods There are two solar power generation methods, one is the conversion method light-heat-electricity, and the other is the method of directly converting light into electricity. 02 (1) The light-heat-dynamic-electricity conversion method generates electricity using thermal energy generated by solar radiation. Generally, a solar collector converts the absorbed thermal energy intovapor of working fluid. drive the steam turbine to produce electricity. The first process is a process of converting light into heat; the second process is a conversion of moving heat into electricity and the final conversion process, which is the same as ordinary thermal power generation. The disadvantages of solar thermal power generation are as follows. that the yield is very low and the cost is very high. Its investment is estimated to be at least 5 to 10 times more expensive than ordinary thermal power plants. 03 (2) Direct light-to-electricity conversion method This method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the solar cell. . A solar cell is a device that directly converts solar energy into electrical energy.electrical thanks to the photovoltaic effect. When the sun shines on the photodiode, the photodiode converts light energy from the sun into electrical energy, producing current. When many batteries are connected in series or parallel, a solar cell array with relatively large output power can be formed. Solar cells are a promising new energy source with three major advantages: Solar cells have a long lifespan and can be invested once and used for a long time as long as the sun exists compared to thermal power generation . the cells do not cause environmental pollution.