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![](https://pic.pdfchm.net/empty.gif) Renewable Electricity and the Grid: The Challenge of VariabilityCan renewable energy provide reliable power? Will it need extensive backup?
The energy available from wind, waves, tides and the sun varies in ways that may not match variations in energy demand. Assimilating these fluctuations can affect the operation and economics of electricity networks. Is this a significant problem, or can these... | ![](https://www.pdfchm.net/pic/empty.gif) | ![](https://pic.pdfchm.net/empty.gif) Pounder's Marine Diesel Engines and Gas Turbines, Ninth EditionSince its first appearance in 1950, Pounder's Marine Diesel Engines has served seagoing engineers, students of the Certificates of Competency examinations and the marine engineering industry throughout the world. Each new edition has noted the changes in engine design and the influence of new technology and economic needs on the marine... | ![](https://www.pdfchm.net/pic/empty.gif) | ![](https://pic.pdfchm.net/empty.gif) The Portable MachiavelliEdited and translated by Peter Bondanella and Mark Musa, "The Portable Machiavelli" not only gives the casual reader a chance to read different personal and professional works of Machiavelli, but also strives to do away with many of the myths that have plagued the man's posthumous fame. For example, the famous 'the ends justifies the... |
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