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太陽能

太陽能的供應源源不斷,是一種非常清潔的能源,不會引起污染,更不會耗盡自然資源或導致全球溫室效應。

太陽能的優點,是可以在地球的所有地方得到,而且實用性高、用途多。現代的太陽能系統,在每天日照時間相當短的國家,也可以經濟有效地提供大量電能。

太陽能的科技,應用甚廣。例如太陽能的計算機、手錶,在市面上很普遍。

另外,利用太陽能來驅動的熱水器和太陽屋,在外國亦可見到不少,但在香港則不易看到。而太陽能的交通工具,在一些科技較先進的國家亦有研究發展,例如美國、日本。這些交通工具包括飛機、汽車。

其實,溫室將太陽的能量貯存在一個空間內,令植物得以持續生長。

現今人類最關注的能源問題,太陽能發電廠亦能夠幫助去解決。

更新:

核能

核能發電,是利用核分裂產生巨大的能量,製造高溫高壓的蒸氣或氣體,驅動發電機組發電。

核能所用的燃料,乃是可分裂或融合的放射性物質,例如鈾、鈽、鈾等。例如克鈾裂所產生的能相當於燃燒3000噸上等的煤所產生的熱量。

目前核能發電量僅佔全球能源和電力供應百分之七和十七。水力發電

用水力進行發電,是以人工方法,引導水流以高速度衝擊水輪機,帶動水輪機和發電機的旋轉, 從而產生電力。因此,一般在水電站的上游,建造攔河壩和蓄水庫,積蓄水量,提高落差(水頭)。

更新 2:

水力發電

水力發電是再生能源,對環境衝擊較小。除了提供廉價電力外,還有下列之優點:控制洪水氾濫、提供灌溉用水、改善河流航運,有關工程同時改善該地區的交通、電力供應和經濟,特別可以發展旅遊業及水產養殖。美國田納西河的綜合發展計劃,是首個大型的水利工程,帶動整體的經濟發展。

更新 3:

風力能

風力能一般指風力渦輪機透過自然的空氣流動而產生的電力。據說第一部自動發電的風力渦輪機是在1887年由美國人查理斯發明的。其後於1918年,丹麥約120間公用事業都安裝了風力渦輪機,這刺激了風力能的發展。今天,全球大約有35,000座發電風力渦輪機。

2 個解答

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  • 1 十年前
    最愛解答

    Solar energy The solar energy supply continuously, is one kind of extremelyclean energy, cannot cause the pollution, cannot exhaust the naturalresource or cause the whole world greenhouse effect. The solar energy merit, is may obtain in Earth's all places, moreoverthe usability high, the use are many. Modern solar energy system, indaily sunshine time quite short country, also may the economyeffectively provide the massive electrical energies. The solar energy science and technology, the application is reallybroad. For example the solar energy computer, the wristwatch, are verycommon in the market condition. Moreover, the water heater and the solar room which actuates using thesolar energy, also obviously arrives in the foreign country many, butin Hong Kong not Yi seete. But the solar energy transportationvehicle, also has the research development in some technical moreadvanced countries, for example US, Japan. These transportationvehicles including airplane, automobile. Actually, the greenhouse sun's energy storing in a space, can continuethe plant to grow. Nowadays the humanity most pays attention the energy question, thesolar power plant also can the help solve.

    Nuclear power The nuclear power electricity generation, is has the hugeenergy using the nuclear fission, the manufacture high temperaturehigh pressure vapor or the gas, the actuation power set electricitygeneration. The nuclear power uses the fuel, is may split or the fusionradioactive substance, for example uranium, uranium and so on.For example the gram uranium crack produces can be equal to burns thequantity of heat which 3,000 tons superior coals produces. At present the nuclear power power rate only occupies the globalenergy and the electric power supply 7% and 17. Hydraulicelectrogenerating Carries on the electricity generation with the water power, isby the artificial method, the guidance current of water by the highvelocity impact hydraulic turbine, drives the hydraulic turbine andgenerator revolving, thus has the electric power. Therefore, generallyin the hydroelectric power station upstream, constructs the dam and蓄水庫, the savings water volume, enhances the dropping variance(flood peak). Hydraulic electrogenerating The hydraulic electrogenerating regenerates the energy, issmaller to the environment impact. Besides provides the inexpensiveelectric power, but also has the following merit: The control flood氾 overflows, to provide the irrigation water used, to improve therivers shipping, the related project simultaneously improves thislocal the transportation, the electric power supply and the economy,specially may develop the tourism and the aquaculture. The AmericanTennessee River's synthesis development plan, is the first large-scalehydraulic engineering, the impetus whole economical development.

    Wind power energy The wind power can generally refer to the electric power whichwind power turbine penetration natural air transport produces. It issaid the first automatic electricity generation wind power turbine wasinvents in 1887 by American Charlie Si. The hereafter in 1918, theDanish 120 public utilities all has approximately installed the windpower turbine, this stimulated the wind power to be able development.Today, the whole world probably has 35,,000 electricity generationswind power turbine.

    Hydraulic electrogenerating The hydraulic electrogenerating regenerates the energy, issmaller to the environment impact. Besides provides the inexpensiveelectric power, but also has the following merit: The control flood氾 overflows, to provide the irrigation water used, to improve therivers shipping, the related project simultaneously improves thislocal the transportation, the electric power supply and the economy,specially may develop the tourism and the aquaculture. The AmericanTennessee River's synthesis development plan, is the first large-scalehydraulic engineering, the impetus whole economical development.

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  • 1 十年前

    Solar energy

    Supply of solar energy continually, one clean energy very, can cause pollution, will not exhaust the natural resources or cause the global greenhouse effects .

    The advantage of the solar energy, can be got in all places of the earth, and practicability is high, uses are many. The modern solar energy is systematic, in quite short country of sunshine time of every day, can offer a large amount of electric energy economically effectively too.

    Science and technology of the solar energy, it is very wide to use. Such as the calculator , wrist-watch of the solar energy, very general on the market.

    In addition, water heater and the sun room made use of solar energy to drive, can also see much in foreign country, but difficult to see in Hong Kong. And the means of transportation of the solar energy, also study development in some countries with more advanced science and technology, such as U.S.A. , Japan. The means of transportation includes plane , automobile.

    In fact, the greenhouse stores the energy of the sun in a piece of space, make the plant grow continuously.

    The energy question which the mankind pays close attention to most now, the power plant of solar energy can also help to solve .

    Nuclear energy

    The nuclear energy generates electricity, utilizing cores to split , degree produces enormous energy , make the vapour or gas of the high-temperature high pressure , urge the generating set to generate electricity.

    Fuel that the nuclear energy uses, it is a radioactive material that can be split or merged, such as uranium , Bu , uranium ,etc.. For example grams of uranium split produce be able to is it burn 3000 first-class heat that coal produce to equivalent to.

    Generation of nuclear energy only accounts for 7% and 17 of global energy and supply of electric power at present. Hydroelectric generation

    Generate electricity with water conservancy, lead the rivers to strike the hydraulic turbine at the high speed , drive the rotation of hydraulic turbine and generator with the artificial method , thus produced the electricity . So, generally the top in the power station, build the dam and storage reservoir , the water yield of the savings, improve the drop (flood peak).

    Supplement time: 2007-02-26 19:27:51

    Hydroelectric generation

    The hydroelectric generation is the recycled energy, it is relatively small to strike the environment. Besides offering the low-priced electricity , there are the following advantages : Control the flood and overflow, offer and irrigate the water, improve river shipping, improve the traffic , supply of electric power and economy of this area at the same time about the project, can especially develop the tourist industry and aquaculture . The comprehensive development plan of the river of Tennessee of U.S.A., is the first and large-scale irrigation works, drive the economic development of the whole .

    Wind-force can

    Wind-force can point but electricity that produced wind-force turbine flow. It is said the first wind-force turbine generating electricity automatically was invented by the American Charles in 1887. Have thereafter installed the wind-force turbine in about 120 public utilities in Denmark in 1918, this development that can stimulate wind-force . Today, probably 35,000 generate electricity wind-force turbines in the whole world.

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