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Working principle of solar energy

Hits:71 comment:0 Date:2016/11/18 13:35:16 tags:全部

Solar (solar energy), refers to the sun's heat radiation energy (see heat energy in three ways: radiation), the main performance is often said that the sun's rays. In modern times it is generally used to generate electricity or to provide energy for water heaters. Since the birth of life on earth, mainly to the sun to provide heat radiation to survive, and since ancient times, people also know how to use the sun to dry objects, as well as the production of food, such as salt and salted fish, etc.. In the case of dwindling fossil fuels, solar energy has become an important part of human energy use, and has been developing. There are two ways to use solar energy, such as photothermal conversion and photoelectric conversion. The broad sense of solar energy also includes wind energy, chemical energy, water, etc..

Working principle

Solar energy is produced by the fusion of hydrogen atoms in the hydrogen atoms inside the sun.

The vast majority of the human energy is directly or indirectly from the sun. Plants release oxygen and absorb carbon dioxide through photosynthesis, and convert solar energy into chemical energy stored in plants. Coal, oil, natural gas and other fossil fuels by the ancient buried in the underground plants and animals through the long geological evolution of the formation of an energy. The energy of the earth itself is usually the energy associated with the heat of the earth's interior and the energy associated with the nuclear reaction.

Nuclear energy is nuclear energy. Changes in the structure of the atomic nucleus can release a lot of energy, called nuclear energy, referred to as nuclear energy, commonly known as atomic energy. It comes from the nuclear fission energy resources stored in the earth's crust, such as uranium, plutonium and other fission reactions, as well as the fusion of nuclear energy resources, such as deuterium, tritium, lithium, etc.. These substances release energy in the event of a nuclear reaction. The biggest use of nuclear power is power generation. In addition, can also be used as other types of power source, heat source, etc..

Solar energy is the energy produced by the continuous nuclear fusion reaction in the sun. The average intensity of solar radiation in earth orbit is 1369w/ square meters. Earth's equatorial circumference of 40076 km, which can be calculated, the earth's energy can reach 173000TW. The standard peak intensity at sea level is 1kw/m2, the average radiation intensity of the earth's surface at a point 24h is 0.20kw/ square meters, the equivalent of 102000TW energy.

Although the solar radiation to the earth's atmosphere energy is only the total radiant energy of the 2 billion 200 million one, but has been as high as 173000TW, that is to say a second exposure to the sun's energy on earth is equivalent to 5 million tons of coal per second exposure to the earth's energy is 499400,00000 coke. Wind energy, hydro energy, ocean thermal energy, earth wave energy and biomass energy comes from the sun; even the earth's fossil fuels (such as coal, oil and natural gas) is fundamentally since ancient times the storage of solar energy down, so the range of generalized solar energy including very large, narrow solar energy is limited to the direct conversion of solar thermal and photovoltaic and photochemical.

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