1_hydro power plants

Hydro power plantsRaghu Prajapati, nec

Raghu Prajapati, nec

Hydro power plantsTail waterDraft tube gateDraft tubeTurbineMain valvePenstockAir inletInlet gateSurge shaftTunnelSand trapTrash rackSelf closing valveRaghu Prajapati, nec


The principle the water conduits of a traditional high head power plant Raghu Prajapati, nec


Water intakeDamCoarse trash rackIntake gate Sediment settling basementRaghu Prajapati, nec


DamsRockfill damsPilar og platedammerHvelvdammerRaghu Prajapati, nec


Rock-fill damsCoreMoraine, crushed soft rock, concrete, asphaltFilter zoneSandy gravelTransition zoneFine blasted rockSupporting shellBlasted rockRaghu Prajapati, nec


Slab concrete dam Raghu Prajapati, nec


Arc damRaghu Prajapati, nec


Gates in Hydro Power PlantsRaghu Prajapati, nec


Types of Gates

Radial GatesWheel GatesSlide GatesFlap GatesRubber GatesRaghu Prajapati, nec


Radial Gates at lvkarleby, SwedenRaghu Prajapati, nec


Radial Gate The forces acting on the arc will be transferred to the bearingRaghu Prajapati, nec


Slide GateJhimruk Power Plant, Nepal Raghu Prajapati, nec


Flap GateRaghu Prajapati, nec


Rubber gateReinforced rubberOpen position Flow disturbanceReinforced rubberClosed position Bracket Air inlet Raghu Prajapati, nec


Circular gateManholeHinge Ladder RibsPipeEnd coverBolt Fastening element Frame Seal Raghu Prajapati, nec


Circular gateJhimruk Power Plant, Nepal Raghu Prajapati, nec


Trash RacksPanauti Power Plant, NepalRaghu Prajapati, nec


Theun Hinboun Power PlantLaosRaghu Prajapati, nec


GravfossPower PlantNorway

Trash Rack size:Width: 12 meterHeight: 13 meter

Stainless Steel



CompRack Trash Rack delivered by VA-TechRaghu Prajapati, nec


Cleaning the trash rackRaghu Prajapati, nec


GUP-PipeRaubergfossen Power Plant, NorwayRaghu Prajapati, nec


Wood PipesBreivikbotn Power Plant, Norwayvre Porsa Power Plant, NorwayRaghu Prajapati, nec


ValvesRaghu Prajapati, nec


Principle drawings of valvesOpen positionClosed positionSpherical valveGate valveHollow-jet valveButterfly valveRaghu Prajapati, nec


Spherical valveRaghu Prajapati, nec


Bypass systemRaghu Prajapati, nec


Butterfly valveRaghu Prajapati, nec


Butterfly valvedisk types Raghu Prajapati, nec


Hollow-jet ValveRaghu Prajapati, nec


Pelton turbinesLarge heads (from 100 meter to 1800 meter)Relatively small flow rate Maximum of 6 nozzlesGood efficiency over a vide rangeRaghu Prajapati, nec


KvrnerJostedal, Norway*Q = 28,5 m3/s*H = 1130 m*P = 288 MWRaghu Prajapati, nec


Francis turbinesHeads between 15 and 700 meter Medium Flow RatesGood efficiency =0.96 for modern machines



SVARTISENP = 350 MWH = 543 mQ* = 71,5 m3/SD0 = 4,86 mD1 = 4,31mD2 = 2,35 mB0 = 0,28 mn = 333 rpmRaghu Prajapati, nec


Kaplan turbinesLow head (from 70 meter and down to 5 meter)Large flow rates The runner vanes can be governed Good efficiency over a vide rangeRaghu Prajapati, nec


Francis Turbine Cross-SectionBoyle, Renewable Energy, 2nd edition, Oxford University Press, 2003Raghu Prajapati, nec


Small Francis Turbine & Generator"Water Turbine," Wikipedia.comRaghu Prajapati, nec


Francis Turbine Grand Coulee Dam"Water Turbine," Wikipedia.comRaghu Prajapati, nec


Fixed-Pitch Propeller Turbine"Water Turbine," Wikipedia.comRaghu Prajapati, nec


Kaplan Turbine Schematic"Water Turbine," Wikipedia.comRaghu Prajapati, nec


Kaplan Turbine Cross Section"Water Turbine," Wikipedia.comRaghu Prajapati, nec


Suspended Power, Sheeler, 1939Raghu Prajapati, nec


Vertical Kaplan Turbine SetupBoyle, Renewable Energy, 2nd edition, Oxford University Press, 2003Raghu Prajapati, nec


Horizontal Kaplan TurbineBoyle, Renewable Energy, 2nd edition, Oxford University Press, 2003Raghu Prajapati, nec


Pelton Wheel TurbineBoyle, Renewable Energy, 2nd edition, Oxford University Press, 2003Raghu Prajapati, nec


Turgo TurbineBoyle, Renewable Energy, 2nd edition, Oxford University Press, 2003Raghu Prajapati, nec


Francis Turbine Grand CouleeRaghu Prajapati, nec


Francis and Turgo Turbine WheelsRaghu Prajapati, nec


1_hydro power plants

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