How to use the light energy of the scorching sun to convert it into electric energy or other energy in high temperature weather?
6? 1 power generation principle of solar cells
6? Manufacturing process of 1 crystalline silicon solar cell
6? 1 history of solar energy utilization
6? Advantages and disadvantages of 1
6? 1 solar energy resources in China
6? 1 the road to solar energy development
6? 1 solar thermal utilization
6? 1 space solar power supply
6? 1 the first solar power station
6? 1 solar cell
6? 1 magic solar curling charger
6? 1 space solar power supply
6? 1 the first solar power station
6? 1 solar cell
6? 1 magic solar curling charger
Solar energy generally refers to the radiant energy of sunlight. The nuclear reaction of "hydrogen" into "helium" in the sun constantly releases huge energy and radiates energy into space. This energy is solar energy. This nuclear fusion reaction inside the sun can last for billions to billions of years. The radiation power emitted by the sun into space is 380 billion kilowatts, of which 10 billion kilowatts reaches the earth's atmosphere. 30% of the solar energy reaching the earth's atmosphere is reflected by the atmosphere, 23% is absorbed by the atmosphere, and the rest reaches the earth's surface with a power of 8 trillion kilowatts, which means that the energy that the sun shines on the earth every second is equivalent to the heat released by burning 5 million tons of coal. In a broad sense, solar energy is the source of a lot of energy on the earth, such as wind energy, chemical energy, potential energy of water and so on. The narrow sense of solar energy is limited to the direct conversion of solar radiation energy into light, heat, electricity and photochemistry.
Humans have a long history of using solar energy. As early as 2000 years ago, during the Warring States Period, China knew to use a steel four-sided mirror to focus the sunlight and ignite it. Using solar energy to dry agricultural and sideline products. With the development of modern times, the utilization of solar energy is increasingly extensive, including photothermal utilization, photoelectric utilization and photochemical utilization of solar energy. There are two ways to utilize solar energy: passive utilization (photothermal conversion) and photoelectric conversion. Solar power generation is a new way of renewable energy utilization.
Solar cells convert the energy contained in sunlight into electric energy through photoelectric conversion, solar water heaters use the heat of sunlight to heat water, hot water is used to generate electricity, and solar energy is used to desalinate seawater. At present, the use of solar energy is not very popular, and there are still problems of high cost and low conversion efficiency in using solar energy to generate electricity, but solar cells have been used to provide energy for artificial satellites.
principle
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Solar energy is the energy generated by the continuous nuclear fusion reaction process inside the sun. The average solar radiation intensity in earth orbit is 1367w/㎡. The circumference of the equator of the earth is 40000km, and it can be calculated that the energy obtained by the earth can reach173,000 tw. The standard peak intensity of sea level is 1kw/m2, and the 24-hour annual average radiation intensity at a certain point on the earth's surface is 0.20 kW/m2, which is equivalent to the energy of 102000TW. Human beings depend on these energy sources for survival, including all other forms of renewable energy (except geothermal energy). Although the total amount of solar energy resources is equivalent to more than 1 10,000 times of the energy currently used by human beings, the energy density of solar energy. These characteristics of solar energy will limit its role in the whole integrated energy system.
Although the energy radiated by the sun to the earth's atmosphere is only 2.2 billion times of its total radiation energy, it is as high as 173000 tw, which means that the energy radiated by the sun to the earth every second is equivalent to 5 million tons of coal. Wind energy, water energy, ocean temperature difference energy, wave energy, biomass energy and some tidal energy on the earth all come from the sun; Even the fossil fuels on the earth (such as coal, oil, natural gas, etc. ) are basically solar energy stored since ancient times, so the broad sense of solar energy covers a very large range, while the narrow sense of solar energy is limited to the direct conversion of solar radiation into photothermal, photoelectric and photochemical energy.
Solar energy is both primary energy and renewable energy. It is rich in resources, can be used for free, does not need transportation, and has no pollution to the environment. It has created a new life form for human beings, and brought society and human beings into an era of energy saving and emission reduction.