Solar energy is the energy radiated by the sun. In the face of the earth, in addition to nuclear energy and geothermal energy, solar energy is all mine, Liu [fuel wind energy, hydropower and other) sources.
The sun is a hot air ball, the diameter of 1.39xl06km, the effective temperature of its surface is about 6000K, the center temperature is estimated at 8 × 10. A 4 × Lo 'K, the pressure of about 1.96 x 10 "kPa. under high temperature and pressure of this, the interior of the sun continuously carried out nuclear fusion reaction, which generated multimillion degree temperatures inside the sun, this is the sun radiated to space out a great source of energy. The fusion reaction mentioned above can be sustained effect stem million years, so the sun is actually an inexhaustible, be inexhaustible energy. The radiation power of the sun is about 3.75 × 10 W," a year of the earth's surface can be obtained by solar energy is about 6 × 10 "kwh, tens of thousands of times is equivalent to the consumption of human in a year with energy.
When solar energy is no pollution, clean energy, and has not need transportation. Therefore, in the present situation of worldwide energy shortage and environmental protection requirements more stringent, have very important significance in the application of solar energy. Therefore, many countries now spend a lot of resources
Intensify the study of solar energy utilization of gold, human, and material resources. |
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