Solar power generation principle is what

Now the country's increasingly advocated the concept of energy conservation and environmental protection, solar energy here is very good use of it, so what is solar power? What type is it? Through water or other medium and device to convert solar radiation into electricity generating way,



now the country's increasingly advocated the concept of energy conservation and environmental protection, solar energy here is very good use of it, so what is solar power? What type is it?

by water or other medium and device to convert solar radiation into electricity way of generating, called solar thermal power generation. Convert solar energy into heat energy, and then the heat energy into electricity, it has two kinds of transformation ways: one is the sun's heat directly into electricity, such as semiconductors or metal material temperature, vacuum device of hot electron and thermoelectric power generation, alkali metal 【 Alkali metal is to point to in the periodic table Ⅰ A clan in addition to the hydrogen ( H） Outside of six metallic elements, namely the lithium ( Li） , sodium ( Na） , k ( K） , rubidium ( Rb) , cesium ( Cs) , eka cesium ( Fr) 。 】 The thermoelectric conversion 【 The thermoelectric conversion refers to the mutual conversion between thermal and electrical energy. 】 Power generation, as well as magnetic 【 MHD power generation, 磁流体动力发电) A conductive fluid flows interact with magnetic fields and generate electricity. 】 And so on; Another way is to the sun's heat through a heat engine ( Such as steam turbine) Drive the generator power generation, is similar to conventional thermal power generation, is only the heat energy comes not from the fuel, but from solar energy.

there are different types of solar thermal power generation, basically has the following five kinds: tower system, groove, disk systems, solar pool and solar power tower Solar power tower is a new concept of energy production, it looks like a giant chimney, but does not release the harmful smoke gas, but through the solar heating air, and converted into electricity. 】 Thermal power generation. The first three are concentrating solar thermal power generation system, the latter two are concentrating. Some developed countries to the solar thermal power generation technology Solar thermal power generation technology is the solar radiation heat energy into electricity, the technology without fossil fuel consumption, no pollution to the environment, can be divided into two categories: one is using solar thermal power generation directly, such as semiconductors or metal material temperature, vacuum device of hot electron, thermionic generator and alkali metal thermal conversion and MHD power generation, etc. ; Another kind is indirect solar thermal power generation, it makes the sun's heat through heat engine driven generators, its basic composition is similar to conventional power generation equipment, but its heat energy comes from solar energy conversion. 】 As a key national research and development, has made dozens of sets of various types of solar thermal power plant demonstration, is up to the level of the practical application of grid power.

currently existing in the world's most promising solar thermal power generation system can be roughly divided into: trough paraboloid 【 Parabolic parabolic, math is the same plane to point ( Focus) The distance and the straight line ( Line) A collection of points equal to the distance. 】 Focus system, the central receiver, or the sun tower system and disc parabolic focusing system. Technically and economically feasible three forms: 30 ~ 80 mw focus parabolic trough type solar thermal power generation technology ( Parabolic trough type) ; 30 ~ 200 mw point focusing central receiving type solar thermal power generation technology ( Referred to as the central receiving type) ; 7. 5 ~ 25 kw point focusing parabolic disc (solar thermal power generation technology Parabolic disc) 。