Solar energy generally refers to the radiant energy of sunlight. Solar energy is a renewable energy source. In a broad sense, solar energy is the source of many energies on the earth, such as wind energy, biomass energy, tidal energy, water potential energy, etc. The basic ways of using solar energy can be divided into four categories: photothermal utilization, photoelectric utilization, photochemical utilization, and photobiological utilization. Among the four types of solar energy utilization, the technology of photothermal conversion is the most mature, the products are the most, and the cost is relatively low. Such as: solar water heaters, water boilers, dryers, solar cookers, solar greenhouses, solar houses, solar desalination devices, and solar heating and cooling devices. Solar thermal power generation has a higher solar energy conversion efficiency than photovoltaic power generation, but its application is not yet widespread. In photothermal conversion, the application of solar water heaters is currently the most widely used, the most mature technology, and the best economy.
Photothermal utilization: It collects solar radiation and converts it into heat energy through interaction with matter for utilization. Currently, the most commonly used solar energy collection devices are mainly flat plate collectors, vacuum tube collectors and focusing collectors. Solar power generation: In the future, large-scale utilization of solar energy will be used for power generation.
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