Solar energy (go back »)

The solar energy generally points the radiation energy of the sun light.Carry on in the sun inner part of become to°from"hydrogen" fusion the atomic nucleus of "Hai" to respond, keep releasing a huge energy, and continuously radiate energy toward the astrospace, this kind of energy is a solar energy.This kind of nuclear fusion of the sun inner part respond that can maintain for several 1,000,000,000 highest 100100000000 years.The radiation power that the sun shoots toward the astrospace is the radiation of the 380000000000000000000000 kWs value and one of 2,000,000,000 among those cents arrives the Earth atmosphere.Arrive the solar energy of the Earth atmosphere, 30% is reflect by the atmosphere, 23% is absorb by the atmosphere, the Earth surface of the arrive of rest, its power is 80,000,000,000,000 kWs, be also the energy which says that the sun projects light upon on the earth every second equal  to burn the calories that 5,000,000 ton coals release.The solar energy of broad sense is many sources of energies on the earth, such as the wind energy, chemistry ability, water of certainly ability etc..The solar energy of narrow sense then is limited by the sun radiation an ability of light hot, light electricity and photochemistry of direct conversion.

  The mankind's exploitation to the solar energy has long history.China the as early as war country of more than 2,000 year agos be period, know that the exploitation steel system on all sides mirror focuses the sun light to light fire;Make use of the solar energy comes to dry agriculture by-product.Develop a modern, solar energy of exploitation already day by day extensive, it includes solar light heat exploitation, solar energy of the light electricity make use of and solar energy of the photochemistry make use of etc..The exploitation of solar energy has a passive type exploitation(light hot conversion) and only gives or get an electric shock to convert two kinds of method.The solar energy generates electricity 1 kind newly arisenly can the renewable energy make use of a way.

  Use solar panel, pass light electricity conversion include in the sun light of the energy convert for the electric power, use a solar hot water heater, the calories which makes use of the sun light fills with hot water, and make use of hot water to generate electricity, make use of solar energy to carry on seawater desalination.Now, the exploitation of solar energy is still not very universal and make use of solar energy to generate electricity to still exist cost Gao, conversion the efficiency low problem, but the solar panel is providing energy to get for the man-made satellite application.