火力發(fā)電廠

英語聽力

The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily <br />available fuel with which to generate large amounts of electric power. Coal seemed to fit the bill, and it fueled the earliest power stations. (which were set up at the end of the nineteenth century by Edison himself). As more power plants were constructed throughout the country, the reliance on coal increased throughout the country, the reliance on coal increased. Since the First World War, coal-fired power plants had a combined in the United States each year. In 1986 such plants had a combined generating capacity of 289,000 megawatts and consumed 83 percent of the nearly 900 million tons of coal mined in the country that year. Given the uncertainty in the future growth of the nearly 900 million tons of coal mined in the country that year. Given the uncertainty in the future growth of nuclear power and in the supply of oil and natural gas, coal-fired power plants could well provide up to 70 percent of the electric power in the United States by the end of the century. Yet, in spite of the fact that coal has long been a source of electricity and may remain on for many years(coal represents about 80 percent of United States fossil-fuel reserves), it has actually never been the most desirable fossil fuel for power plants. Coal contains less energy per unit of weight than weight than natural gas or oil; it is difficult to transport, and it is associated with a host of environmental issues, among them acid rain. Since the late 1960's problems of emission control and waste disposal have sharply reduced the appeal of coal-fired power plants. The cost of ameliorating these environment problems along with the rising cost of building a facility as large and complex as a coal-fired power plant, have also made such plants less attractive from a purely economic perspective. Changes in the technological base of coal-fired power plants could restore their attractiveness, however. Whereas some of these changes are intended mainly to increase the productivity of existing plants, completely new technologies for burning coal cleanly are also being developed.<br />托馬斯 ·愛迪生 1879 年發(fā)明的白熾燈導(dǎo)致對便宜、易得、可生產(chǎn)大量電能的燃料的需求。 煤似乎符合這個要求，并成為第一批電廠的燃料(正是愛迪生本人在 19 世紀(jì)末建造了第一批電廠)。 全國到處興建電廠時，對煤的依賴加深了。 自第一次世界大戰(zhàn)以來，美國每年約有一半的電力是以煤為燃料的電廠提供的。 1986 年這些電廠的總發(fā)電能力達(dá)到28，900 千瓦并且消耗了當(dāng)年全國開采的九億噸煤的 83%。 考慮到核能發(fā)展以及石油、天然氣供應(yīng)中的不確定因素，到本世紀(jì)末，火力發(fā)電廠仍可能為美國提供多達(dá) 70%的電力。 然而，盡管煤長期以來一直是電力的原料之一并且可能會繼續(xù)如此(煤占美國化石燃料儲量的 80%)，它卻不是電廠的理想燃料。 煤的單位能量含量低于石油和天然氣，而且會導(dǎo)致包括酸雨在內(nèi)的一系列環(huán)境問題。 從 1960 年以來，排放控制和垃圾處理的問題極大地削弱了燃煤電廠的魅力。 由于減輕這些環(huán)境問題需要大量資金，而且建造龐大復(fù)雜的燃煤電廠的費(fèi)用不斷上漲，也使得這些電廠從經(jīng)濟(jì)角度上不具備吸引力。 改變火力發(fā)電廠的基礎(chǔ)技術(shù)卻可能恢復(fù)它們的吸引力。 雖然某些技術(shù)改進(jìn)是漸進(jìn)的，其目的只是提高現(xiàn)有電廠的生產(chǎn)率，但人們正在開發(fā)全新的清潔燃煤的技術(shù)。

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火力發(fā)電廠在線試聽，火力發(fā)電廠mp3歌曲下載

歌曲名：火力發(fā)電廠歌手：英語聽力所屬專輯：《英語現(xiàn)代文背誦篇章》

作詞：作曲：發(fā)行公司：未知發(fā)行時間：2012-01-01

歌曲ID：2608804 語言：大?。?26.75 KB 時長：02:15秒比特率：33K 評分：0.0分

介紹：《火力發(fā)電廠》是英語聽力演唱的歌曲，時長02分15秒，由作詞，作曲，該歌曲收錄在英語聽力2012年的專輯《英語現(xiàn)代文背誦篇章》之中，如果您覺得好聽的話，就把這首歌分享給您的朋友共同聆聽，一起支持歌手英語聽力吧！

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