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  2. Water turbine - Wikipedia

    en.wikipedia.org/wiki/Water_turbine

    The runner of the small water turbine. A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work. Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now, they are mostly used for electric power generation.

  3. Water wall turbine - Wikipedia

    en.wikipedia.org/wiki/Water_Wall_Turbine

    Between 2004 and 2010, [1] Lodewyk Botha and Marek Sredzki developed an inflow turbine that captures water's potential energy in addition to its kinetic energy. Principal patents [2] [3] for the technology were registered and published between 2005 and 2011. The first full-scale water wall turbine project was completed in 2016 by Water Wall ...

  4. List of PDF software - Wikipedia

    en.wikipedia.org/wiki/List_of_PDF_software

    Open source multi-backend library for viewing and manipulating PDF files. Bundled with a viewer with the same name for the X Window System. PDF Studio: Proprietary: Yes Yes Software for viewing and editing PDF documents Inkscape: GNU GPL: Yes Technically not a PDF editor, but can be used as such page by page Adobe Reader: Proprietary freeware Yes

  5. Category:Free PDF software - Wikipedia

    en.wikipedia.org/wiki/Category:Free_PDF_software

    This is a category of articles relating to free software for making or viewing Portable Document Format (PDF) documents. That is, software which can be freely used, copied, studied, modified, and redistributed by everyone that obtains a copy. Typically, this means software which is distributed with a free software license, and whose source code ...

  6. Segner wheel - Wikipedia

    en.wikipedia.org/wiki/Segner_wheel

    Segner-wheel: A – water inlet, B – vertical tube with rotor, C – rotor with nozzles (side view), D – rotor with nozzles ("top" view), E – hole in the ground, F – belt-pulley transmission, G – powered device. The Segner wheel or Segner turbine is a type of water turbine invented by Johann Andreas Segner in the 18th century. [1]

  7. Francis turbine - Wikipedia

    en.wikipedia.org/wiki/Francis_turbine

    The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. [1] The process of arriving at the modern Francis runner design took from 1848 to approximately 1920. [1]

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