太阳能利用翻译.doc

Fossil fuels in the petroleum and natural gas is the worlds major one-time energy World Energy Council, according to statistics, has proven oil and gas recoverable reserves, according to the output of countries in 1992 terms, respectively, only the exploitation of 44 years and 60 years; although they may be recoverable reserves there will be new discoveries, but also the growth needs of the community, especially taking into account the economic development of Third World countries, the exploitation of oil and gas fuel for a long time. In fossil fuels, although the most abundant coal reserves, but the serious pollution caused by coal-fired so that it can not become large the major source of energy worldwide. On the other hand, nuclear fusion reactions can provide clean energy, in the ocean contains about 42 trillion tons of the major nuclear fusion of deuterium-reactive substances; fusion reactor but it is very difficult to study, it is estimated that the next century to the late nuclear poly substation be possible to achieve widespread commercialization. Therefore, in the 21st century, the prospects for energy, you may have to face the depletion of oil and gas resources, the commercialization of fusion power failure during the period of temporary shortage of such people. During this period in order to ensure sufficient human clean energy supply, use of solar energy for power generation is an inevitable choice. Solar energy is the most important renewable sources of energy, the planet with all kinds of energy are closely related. In fact, the sun in Earths evolution, biological reproduction and human development, plays a very important role, but also provides a human inexhaustible source of energy. Solar interior ongoing response to the release of a high-temperature nuclear fusion power of about 3. 8 × 1026 watts of huge radiation, of which only arrived in regard to the atmospheric level二十亿分之一; through the atmosphere, about 30% reflected, 23% be absorbed, only half