Shaft power plant
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United States of America Patent
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Aug 18, 2015
Grant Date -
Aug 9, 2012
app pub date -
Jul 8, 2010
filing date -
Aug 12, 2009
priority date (Note) -
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Abstract
A shaft power plant for energy conversion of a discharge between a headwater and a tailwater, comprising a vertical shaft, the top of which forms an inflow plane which is parallel to the bed and extends below the headwater water level, wherein the shaft is open toward the top and is closed by a base at its bottom end, a unit composed of a turbine and an electrical machine, wherein the unit is arranged entirely under water in the shaft and wherein the turbine is arranged for water to pass through vertically, and an outflow, which is connected to the turbine, represents a closed flow channel and leads through a through-passage in the shaft to the tailwater, wherein, in a horizontal plane of a turbine runner of the turbine, a first cross-sectional area of the shaft is much larger than a second cross-sectional area taken up by the turbine runner.
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