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Principles of solar panels
Apr 18, 2016

(1) light-thermo-electric conversion through the use of solar thermal power generation, the heat energy is absorbed by the solar collectors will be converted to the refrigerant vapor, then drives a steam turbine to generate electricity. One is light-heat conversion; the latter process is heat-electricity conversion process, as with ordinary coal. disadvantage of solar thermal power generation is inefficient and costly, estimated the investment at least 5~10 times more expensive than ordinary thermal power stations. a 1000MW of solar thermal power stations need to invest 20~25 billion US dollars, 1kW investment of us $ 2000~2500 on average. Therefore, at present, only small scale should be used for special occasions, and large-scale use is not economically viable, still cannot compete with conventional thermal power stations or nuclear power plants.

(2) Photo-electric direct conversion that uses the photoelectric effect, solar radiation directly into electricity, light-electricity conversion device is a solar cell. Effect of solar cells is a Yu Guangsheng volts and convert sunlight directly into electricity, is a semiconductor diode, when Sun light hits the photodiode, and photodiodes will turn the Sun's energy into electricity, and produce electricity. While many batteries in series or in parallel can become a larger output power of a square solar cells. Solar is a great future of new power, has permanent, and clean sex and flexibility three big advantages. solar life long, as long as Sun exists, solar on can once investment and long-term using; and fire power, and nuclear power compared, solar not caused pollution; solar can big small simultaneously, big to kW of medium power station, small to only for a households with of solar group, this is other power cannot compared of.