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1、Solar power Along with economical development, societys progress, the people to the energy proposed the more and more high request, seeks the new energy to become the urgent topic which the current humanity faces.The existing energy mainly has 3 kinds, namely thermal power, water and electricity。 Wa

2、ter and electricity to a large number of submerged land, that could lead to ecological destruction and the collapse of large reservoirs once the collapse, the consequences would be disastrous. In addition, a countrys water resources is also limited, but also by the impact of the season. Nuclear powe

3、r under normal circumstances is clean, but unlikely event of a nuclear leak, the consequences are terrible same. The former Soviet Union, the Chernobyl nuclear power plant accident, has nine million people have been varying degrees of damage, and this impact has not been terminated These are compell

4、ing people to go looking for new energy. New energy to simultaneously satisfy two conditions: First, not depletion of rich; II are safe, clean, not a threat to humans and damage the environment. Currently found in the main, two new energy, solar energy first, and second, the fuel cell. In addition,

5、wind power could also be regarded as supporting the new energy. Among them, the best new energy sources are able to Dayang. Solar power generation are the best new energy .Radiation in the Earths solar energy is very strong, about 40 minutes exposure in the Earths solar energy, would be sufficient f

6、or the global human energy consumption for one year. It can be said that solar energy is truly inexhaustible source of energy. And solar power is absolutely clean, no pollution. So are ideal for solar power as energy。 Obtained from solar power, sun through photovoltaic cells transform to achieve. It

7、 with other power generation principle of the past, entirely different, with the following characteristics: no danger of depletion; absolutely clean (free); not subject to geographical distribution of the resources constraints; nearest Department in electricity generation; energy, high-quality; user

8、s emotionally receptive; access to energy to spend a short time. Inadequacies are: exposure energy distribution density, which was to occupy a huge area; energy obtained with the four seasons, day and night and the clear one, such as meteorological conditions. Overall, however, as a new energy, sola

9、r energy has great advantages, so the importance attached by countries in the world. Solar power applications Although solar power by day and night, barometer, seasonal impact, but can be dispersed manner, so it is suitable for families to carry out sub-exciton generation, but also to connect to the

10、 electricity network, making the family rich in the power may be sold to power companies, can be less than when bought from the power companies. Realize that the technology is not difficult to resolve, the key is to have the appropriate legal protection. Now the United States, Japan and other develo

11、ped countries have enacted appropriate legislation, to ensure the conduct of domestic solar power generation benefits to encourage families to carry out solar power The prospects for solar power generation Solar power generation has more exciting plans. First, Japan plans to Genesis. Ready use of th

12、e ground area of desert and ocean to generate electricity, and through the superconducting cable It is power grid to the global supply.the worlds solar power stations into a unified will be estimated that by 2000, 2050, 2100, even if the whole solar power with global energy supply, but also as an ar

13、ea of 651,100 square km, 1.8679 million square kilometers, 8.2919 million square kilometers. 8.2919 million square kilometers accounted for only 2.3 percent of all marine area or all of the desert 51.4%, nd even the Sahara desert is 91.5%. Therefore this program are possible Another generation progr

14、ams are in heaven. As early as 1980, NASA and the Department of Energy has proposed building a solar power station in space the idea of ready-synchronous orbit in place a long 10 kilometers wide and 5 kilometers of large flat-panel, the top covered with solar cells so as to provide five million kilo

15、watts of electricity. However, this needs to be addressed to the terrestrial wireless transmission problem. Have been proposed by microwave beam, laser beam, such as a variety of programs. Although the current use of model aircraft realize a short-range, short-term, low-power microwave wireless powe

16、r transmission, but there is still a long away from the real utility of the distance. As Chinas technological development, in 2006, China has three companies into the global top ten, indicates that China will become the worlds new energy technology centers in the world, the worlds wide range of phot

17、ovoltaic applications, has led to the current lack of are raw material supply and prices, we need technology to promote at the same time, we must adopt a new technology in order to substantially reduce costs, for this new energy to provide the driving force behind the long-term development! The use

18、of solar energy is divided into several main areas: families with small solar power plants, large-scale grid and power plants, building integrated photovoltaic curtain walls, solar street lamps, street lamps complementary scenery, beautiful complementary power supply system, etc., and now the main a

19、pplication for the building complementary systems integration and scenery. Principles of solar cell power generation Solar cells are one has to respond to light and can convert light energy into electric power devices. Photovoltaic effect to produce the material has many types such as: silicon, poly

20、silicon, amorphous silicon, gallium arsenide, copper indium selenium. Their power is basically the same principle, it is crystal as an example to describe the process of light generation. P-type crystalline silicon doped phosphorus available through N-type silicon, the formation of P-N junction。 Whe

21、n the light irradiation surface of solar cells, silicon material was part of photon absorption; photon energy transfer to the silicon atom, so that electronic transfers have taken place in Vietnam, becoming free electrons in the P-N junction formed on both sides of agglomeration potential difference

22、, when the external When connected to the circuit, in which the role of voltage, there will be current flow through external circuitry produce a certain output power. The substance of this process are: photon energy into electrical energy conversion process. The application of solar cells: the 60s o

23、f last century, scientists have applied to the space solar cell technology communication satellite power supply, the end of last century, constantly in the human soul-searching process, the photovoltaic power generation such a clean and direct forms of energy have been more cordial, not only in spac

24、e applications, in many areas is also to show their talents. Such as: solar Garden lights, solar household power system, the independent village power supply systems, photovoltaic pumping (drinking water or irrigation), communications power supply, the oil pipeline cathodic protection, fiber optic c

25、ommunications power supply pumping stations, desalination systems, cities and towns in road signs , highway road signs and so on. Advanced European countries and America will be incorporated into the city of photovoltaic power systems and remote areas of the natural world into the village power supp

26、ly system development. Solar cells with a combination of building systems has become the trend of industrialization 太阳能发电 随着经济的发展、社会的进步,人们对能源提出越来越高的要求,寻找新能源成为当前人类面临的迫切课题。现有能源主要有3种,即火电、水电和核电。 水电要淹没大量土地,有可能导致生态环境破坏,而且大型水库一旦塌崩,后果将不堪设想。另外,一个国家的水力资源也是有限的,而且还要受季节的影响。核电在正常情况下固然是干净的,但万一发生核泄漏,后果同样是可怕的。前苏联切尔诺

27、贝利核电站事故,已使900万人受到了不同程度的损害,而且这一影响并未终止。 这些都迫使人们去寻找新能源。新能源要同时符合两个条件:一是蕴藏丰富不会枯竭;二是安全、干净,不会威胁人类和破坏环境。目前找到的新能源主要有两种,一是太阳能,二是燃料电池。另外,风力发电也可算是辅助性的新能源。其中,最理想的新能源是大阳能。 太阳能发电是最理想的新能源 照射在地球上的太阳能非常巨大,大约40分钟照射在地球上的太阳能,便足以供全球人类一年能量的消费。可以说,太阳能是真正取之不尽、用之不竭的能源。而且太阳能发电绝对干净,不产生公害。所以太阳能发电被誉为是理想的能源。 。 从太阳能获得电力,需通过大阳电池进行光

28、电变换来实现。它同以往其他电源发电原理完全不同,具有以下特点:无枯竭危险;绝对干净(无公害);不受资源分布地域的限制;可在用电处就近发电;能源质量高;使用者从感情上容易接受;获取能源花费的时间短。不足之处是:照射的能量分布密度小,即要占用巨大面积;获得的能源同四季、昼夜及阴晴等气象条件有关。但总的说来,瑕不掩瑜,作为新能源,太阳能具有极大优点,因此受到世界各国的重视。 太阳能发电的应用 太阳能发电虽受昼夜、晴雨、季节的影响,但可以分散地进行,所以它适于各家各户分激进行发电,而且要联接到供电网络上,使得各个家庭在电力富裕时可将其卖给电力公司,不足时又可从电力公司买入。实现这一点的技术不难解决,关键在于要有相应的法律保障。现在美国、日本等发达国家都已制定了相应法律,保证进行太阳能发电的家庭利益,鼓励家庭进行太阳能发电。 太阳能发电的前景 太阳能发电有更加激动人心的计划。一是日本提出的创世纪计划。准备利用地面上沙漠和海洋面积进行发电,并通过超导电缆将全球太阳能发电站联成统一电网以便向全球供电。据测算,到2000年、2050年、2100年,即使全用太阳能发电供给全球能源,占地也不过为 65.11万平方公里、 186.79万平方公里、829.19万平方公里。829.19万平方公里才占全部海洋面积 2.3或

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