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Solar energy utilization

April 29, 2024

Photothermal utilization: It collects solar radiant energy and converts it into thermal energy through interaction with matter. At present, the most used solar energy collection devices are mainly three types of flat type collectors, vacuum tube collectors and focus collectors. Solar power: The large-scale use of solar energy in the future is used to generate electricity. There are two main ways to use solar power to generate electricity: 1 light-heat-electric conversion. That is, using the thermal energy generated by solar radiation to generate electricity. Generally, a solar collector is used to convert the absorbed heat energy into steam of the working medium, and then the steam driven gas turbine drives the generator to generate electricity. The former process is light-to-heat conversion, and the latter process is heat-to-electric conversion. 2 light-to-electricity conversion. The basic principle is to use the photovoltaic effect to convert solar radiant energy directly into electrical energy. Its basic device is a solar cell.

Photochemical utilization: This is a photo-chemical conversion method that uses solar radiation to directly decompose water to produce hydrogen.

Photobio-utilization: The process of converting solar energy into biomass through photosynthesis of plants. At present, there are mainly fast-growing plants (such as firewood forests), oil crops and giant seaweeds.

working principle

The sunlight passes through the first layer of glass of the heat absorbing tube to the black heat absorbing layer of the second layer of glass, and absorbs the heat of the solar energy. Since the two layers of glass are vacuum insulated, the heat cannot be transmitted to the outside. It can be transferred to the water inside the glass tube to heat the water in the glass tube. The heated water becomes lighter along the heated surface of the glass tube and enters the insulated storage bucket. The relatively low temperature water in the barrel enters the glass along the back surface of the glass tube. The pipe is replenished, so that the water in the insulated water storage bucket is continuously heated to achieve the purpose of hot water.

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