By Schlager N., Weisblatt J.

ISBN-10: 0787694398

ISBN-13: 9780787694395

ISBN-10: 0787694401

ISBN-13: 9780787694401

ISBN-10: 0787694428

ISBN-13: 9780787694425

This three-volume set introduces researchers to concerns surrounding either present strength resources and substitute strength techniques. whereas there's major dialogue of the non-renewable assets now used to fulfill nearly all of the world's strength wishes (oil, coal and common gas), the first concentration of the set is on more moderen thoughts to satisfy the ever-growing call for. those thoughts contain wind and solar power, gas cells, hydropower, geothermal strength and biomass strength. additionally, extra theoretical resources also are explored, together with chilly fusion, 0 element strength and common forces. Entries speak about the technology at the back of the power resource, amazing scientists and clinical discoveries, present examples of use, and the problems, demanding situations and stumbling blocks to large-scale use. prepared alphabetically by means of access identify.

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S. demand for power simply because most of the best sites for hydroelectric dams already have one. Worldwide, about 40,000 hydroelectric dams provide a total of 675,000 megawatts of power to a billion users. Benefits of hydroelectricity The chief benefit of hydroelectric power, like the power provided by waterwheels, is that fossil fuels do not have to be burned, releasing particulate matter and greenhouse gases (such as carbon dioxide and sulfur dioxide) into the atmosphere, where they produce smog and contribute to global warming and acid rain.

This can be an ongoing problem because when the water level in a reservoir falls during an extended dry period, vegetation grows on the banks. This vegetation, then, is covered by water when the reservoir refills during wet periods, causing the vegetation to rot again and emit gases such as methane and carbon dioxide, contributing to global warming. Finally, this decaying vegetation can alter the form of mercury contained in rocks into a form that is soluble in water. Mercury, a heavy metal like lead, can accumulate in the tissues of fish.

Another challenge concerns distribution of the power. One property owner might build a waterwheel for personal use, but larger waterwheels in high flow streams might generate enough electricity for multiple users. The questions then become how that power is going to be distributed and how its users will divide the cost of constructing the waterwheel. HYDROELECTRICITY Hydroelectricity is any electricity generated by the energy contained in water, but most often the word is used to refer to the electricity generated by hydroelectric dams.

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Alternative Energy (Volume 3) by Schlager N., Weisblatt J.

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