8/18/2019 Assignment - Mini Hydro
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Mini Hydropower Development
Questions
(Answer all 3 questions)
Q1. Sketch the general layout of a Mini Hydropower proect
sche!e" and e#plain the
functions of each ele!ent.
$eir % &he weir is
the !ost i!portant
co!ponent of !ini
hydro power plant.
'ts location will e selected as the head of the flow is
sufficient to get the opti!u! possile
potential energy fro! water.
Headrace hannel % $ater di*erts to the desilting tank.
+ore ay tank % ,elocity of the water will e reduce to the
opti!u! *alue which help to settle
silts. -efore entering to the desilting tank there is a screen
for screening large particle which
!ay da!age turine lades.
esilting &ank % S!all particles which can e settle will e
settle at the desilting tank.
/enstock % $ater caries fro! desilting tank to power house with
a pressure.
/owerhouse % Acco!!odate the turine and generator which produces
the electricity.
Q0. a) $hat is the use of flow duration cur*e (+) for a gi*en
weir site
&he flow duration cur*e is used to predict the distriution
of future flows for hydro power"
water2supply" and pollution studies.
) #plain how to calculate a*erage annual energy generation
fro! ao*e (a).
+ro! +" opti!u! design flow shall e find out. &hen area
co*ered y the + elow Qd
can e calculated in each ti!e inter*al. Su!!ation of all energy
in each ti!e duration is
taken as a*erage annual energy generarion.
1 4 5.6 # Hnet # Qd # (&i!e 7 of Qd occurs) # 6895
k$h
Headra
ce
canal
Pensto
ck
Power houseFore bay Tank
& Desilting Tank
WeirRiver/
Canal
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04 5.6 # Hnet # Q1 # (&i!e 7 of Q0 occurs) # 6895
k$h
.
c) $hat is the equation used to calculate plant capacity. (:i*e
units of each ite!s)
($) 4 ;o*erall # w (kg=!3)
;o*erall 4 ;turine # ;generator #
;transfor!er
d) -riefly discuss the types of hydro turines used in MH/
de*elop!ent.
+rancis &urine is an inward2flow reaction turine that
co!ines radial and a#ial flow
concepts
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Spiral casing" :uide or stay *anes" ?unner lades and raft
tue are !ain co!ponents of
a +rancis turine. +rancis turine is a type of reaction
turine.
@aplan &urine is a propeller2type water turine which has
adustale lades. &hey are
!ostly used in the lowest head hydro sites and are especially
suited for high flow
conditions.
Q3. $hat are the co!!only used financial indices in hydropower
planning process
• -enefit2ost Analysis
• +inancial 'nternal ?ate of ?eturn(+'??)
• et /resent $orth(/,)
https://en.wikipedia.org/wiki/Draft_tubehttps://en.wikipedia.org/wiki/Draft_tube
