Page 100 - Water Standards

8 La y outandStructuralDesi g nof

otherT yp esofPowerhouses

8.1 PowerhousewithBulbunits

8.1.1 Besidesthedesi g np rovisionsforconventionalp ower-
houses , thefollowin g sshallbealsocomp liedwithinthela y out
ofthep owerhousewithbulbunits :
1 Thela y outofthep owerstationareashouldcomp l ywith
thela y outp rinci p leforthep owerstaionareaofreservoirretai-
nin gp owerhouse.Theinletcanal( orforeba y andtailracecanal
)
shallbereasonabl yarran g edtakin gintoaccountthecharac-
terisiticoflowwaterheadtop roducesmoothwaterflowandre-
ducethekineticener gylosscausedb ythechan g eofflowre g ime
asfarasp ossible.Risin gofwaterlevelintailracecanalshallbe
avoided.
2 Sedimentbarrierorsandg uidin gwallshouldbearran g ed
infrontofinletcanalorintake,andsandflushin gfacilities
shouldbep rovidedifnecessar y.
3 Thep rinci p leandre q uirementsforthela y outofintake
section, outletsectionandthep artofthewaterconduitsection
abovewaterlevelisbasicall ythesameasthosefortheconven-
tionalreservoirretainin gp owerhousewithverticalshaftunits.
Thep artofwaterconduitsectionunderwaterisdeterminedac-
cordin gtothere q uirementsforwaterflow, structure ,unitin-
stallation, etc.Thesha p eandsizeofwaterconduitshallmeet
theneedofturbineout p ut.
4 Accordin gtothefeaturesofbulbturbineunit , themain
dimensionsofthep owerhouseareg overnedb ythoseofwater

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