Quickly understand the conversion process and principles of solar power generation

First, solar power generation Solar power generation has two ways, one is the light-heat-electric conversion method, and the other is the light-electric direct conversion method.

(1) The light-thermal-dynamic-electrical conversion method generates electricity by utilizing the thermal energy generated by solar radiation. Generally, the solar collector collects the absorbed thermal energy into the working medium vapor, and then drives the steam turbine to generate electricity. The former process is the light-to-heat conversion process; the latter process is the thermal-to-dynamic conversion to the final conversion process, which is the same as ordinary thermal power generation. The disadvantage of solar thermal power generation is that it is very inefficient and costly, and its investment is estimated. At least 5 to 10 times more expensive than ordinary thermal power stations.

(2) Light-to-electric direct conversion method This method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for light-to-electrical conversion is solar cells. 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 the photodiode, the photodiode turns the solar light into electrical energy. Current. When many batteries are connected in series or in parallel, they can become a square of solar cells with relatively large output power. Solar cells are a promising new type of power source with three advantages of permanentness, cleanliness and flexibility. Solar cells have a long life, and solar cells can be used for long-term use as long as the sun exists; compared with thermal power generation, Solar cells do not cause environmental pollution.

Solar power flow chart