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A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wheel (usually constructed from wood or metal), with numerous blades or buckets attached to the outer rim forming the drive mechanism. Water wheels were still in commercial ...
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The ocean plays a key role in the water cycle as it is the source of 86% of global evaporation. [2] The water cycle involves the exchange of energy, which leads to temperature changes. When water evaporates, it takes up energy from its surroundings and cools the environment. When it condenses, it releases energy and warms the environment.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Reversed the water flow on head race and direction of rotation of the wheel.. The original can be viewed here: Overshot water wheel schematic.svg: . Modifications made by ClemRutter.
Typical efficiency of water wheels exploiting only the kinetic energy was around 30%. [1] These wheels are called stream water wheels, or kinetic water wheels. Instead, undershot water wheels are used in low head sites, like less than 1.5 m, and they also exploit the potential energy of the flow, with efficiencies of up to 84%.
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The collected power is then transferred to the water with a paddle wheel, flippers, [8] [9] [10] or to the air or water with a propeller. Pedaled craft include: Amphibious cycle; Hydrocycle; Pedal-powered kayak [8] [9] [10] Pedal-powered submersible or midget submarine [11] [12] Pedal-powered hydrofoil; Pedalo
The Sagebien wheel is a type of water wheel invented by Alphonse Sagebien of France, a hydrological engineer and a graduate of the École Centrale des Arts et Manufactures. It was one of the most efficient breastshot water wheel designs of its era; when working on a low head of water, the Sagebien wheel could reach efficiencies of up to 90% ...
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