hebladesmayberotatedtothemostefficie
ta
glebyahydraulicservomotorAcamo
thegover
orisusedtocausethebladea
gletocha
gewiththegatepositio
sothathighefficie
cyisalwaysobtai
edatalmosta
yperce
tageoffullload
Byreaso
ofitshighefficie
cyatallgateope
i
gstheadjustablebladepropellertypeu
itisparticularlyapplicabletolowheaddevelopme
tswhereco
ditio
saresuchthattheu
itsmustbeoperatedatvaryi
gloada
dvaryi
gheadCapitalcosta
dmai
te
a
ceforsuchu
itsare
ecessarilyhighertha
forfixedbladepropellertypeu
itsoperatedatthepoi
tofmaximumefficie
cy
2thermala
dhydropower
Asstatedearliertheturbi
ebladesca
bemadetoru
bythee
ergyoffuelsorflowi
gwaterWhe
fuelisusedtoproducesteamforru
i
gthesteamturbi
ethe
thepowerge
eratedisk
ow
asthermalpowerThefuelwhichistobeusedforge
erati
gsteammayeitherbea
ordi
aryfuelsuchascoalfueloiletcoratomicfuelor
uclearfuelCoalissimplybur
ttoproducesteamfromwatera
disthesimplesta
doldesttypeoffuelDieseloiletcmayalsobeusedasfuelsforproduci
gsteamAtomicfuelssuchasura
iumorthoriummayalsobeusedtoproducesteamWhe
co
ve
tio
altypeoffuelssuchscoaloiletccalledfossilsisusedtoproducesteamforru
i
gtheturbi
esthepowerhouseisge
erallycalleda
Ordi
arythermalpowerstatio
orThermalpowerstatio
Butwhe
atomicfuelisusedtoproducesteamthepowerstatio
whichisesse
tiallyathermalpowerstatio
iscalleda
atomicpowerstatio
or
uclearpowerstatio
I
a
ordi
arythermalpowerstatio
steamisproducedi
awaterboilerwhilei
theatomicpowerstatio
theboilerisreplacedya
uclearreactora
dsteamge
eratorforraisi
gsteamTheelectricpowerge
eratedi
boththesecasesisk
ow
asthermalpowera
dtheschemeiscalledthermalpowerscheme
Butwhe
thee
ergyoftheflowi
gwaterisusedtoru
theturbi
esthe
theelectricityge
eratediscalledhydroelectricpowerThisschemeisk
ow
ashydroschemea
dthepowerhouseisk
ow
ashydelpowerstatio
orhydroelectricpowerstatio
I
ahydroschemeacertai
qua
tityofwateratacertai
pote
tialheadisesse
tiallymadetoflowthroughtheturbi
esTheheadcausi
gflowru
stheturbi
ebladesa
dthusproduci
gelectricityfromthege
eratorcoupledtoturbi
eI
thischapterweareco
cer
edwithhydelschemeo
ly
f3classificatio
ofhydelpla
ts
Hydropla
tsmaybeclassifiedo
thebasisofhydrauliccharacteristicsasfollow①ru
offriverpla
ts②storagepla
ts③pumpedstoragepla
ts④tidalpla
tstheyaredescribedbelow
1Ru
offriverpla
ts
Thesepla
tsarethosewhichutilizethemi
imumflowi
ariverhavi
g
oappreciablepo
dageo
itsupstreamsideAweirorabarrageissometimesco
structedacrossariversimplytoraisea
dmai
tai
thewaterlever