Solar energy is an inexhaustible and inexhaustible new energy source for mankind. It is also a clean energy source and does not cause any environmental pollution. People often use three forms of photothermal conversion, photoelectric conversion and photochemical conversion to make full and effective use of solar energy. In agricultural production, it can provide energy supply for planting and breeding bases and protect the environment; it can also be used in agricultural and forestry production or water conservancy construction, such as solar hydrological monitoring and reporting systems, forestry monitoring and reporting systems, and water conservancy irrigation systems.

Photothermal conversion

Solar thermal conversion is a relatively common and main form of solar energy utilization in the world at present. It is the heat effect produced by using sunlight to irradiate the surface of an object. Now it is mainly used in solar water heaters, dryers, greenhouses and solar houses, solar stoves, heating and cooling, desalination devices, solar thermal power generation devices, etc.

Photoelectric conversion

Solar photoelectric conversion is mainly based on semiconductor materials, using light to generate electron-hole pairs, which can generate photocurrent and photovoltage on the PN junction (photovoltaic effect), so as to achieve the purpose of solar photoelectric conversion. Generally, the semiconductor materials used are mainly silicon. The energy density of solar energy on the earth's surface is low, and it is unstable and discontinuous. With solar cells and corresponding storage technologies, solar energy can be collected and stored in a large area to meet the needs of people's work and daily life.

Photochemical conversion

The photochemical conversion technology mainly uses photosynthesis for photoelectrochemical conversion. The dye photosensitizer absorbs sunlight energy to cause the electrons in the dye molecules to transition, and then the electrons enter the collection electricity and generate photocurrent through the external circuit. The development of this technology will enable people to use solar energy to develop intelligently.