A Pelton turbine with a 1.75 m impeller radius has a nozzle with a mouth diameter of 12 cm. Since the optimum rotational speed of the impeller is n=250 rpm to generate maximum power from this Pelton turbine, which is used to generate hydroelectric power; (The retation angle ofE the tubing blades is given a

Elements Of Electromagnetics
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P2
L V?
+ az
+ 21 + hpompa.f =+a2
+ z2 + h¢arbing + hx,toplam hk,sûrekli= f.5 2g
2g
pg
2g
pg
z/1ẠM
(gH)3/4
Wmil
Nsp
hx.yerel =K 2,
hx,toplam= hx,sûrekli + hx yeret
Протра
%3D
2g
1/2
wWmil
Nst
p1/2(gH)5/4
HB
一() ())G)第-())
Wmit,B _ PB (@B
Wmil,A PA @A
%3D
HA
Wmil = pgHỳncürbin
%3D
WA DA
Wmil = prwv(V, – rw)(1 – cosß)
APelton turbine with a 1.75 m impeller radius has a nozzle with a mouth diameter of
12 cm. Since the optimum rotational speed of the impeller is n=250 rpm to generate
maximum power from this Pelton turbine, which is used to generate hydroelectric
power;
(The rotation angle of the turbine blades is given a B=165°)
a) Find the velocity of the water jet. b) Calculate the volumetric flow rate of the flow through the turbine in m^3/s.
91,63 m/s
95,71 m/s
1,457
2,012
82,37 m/s
102,78 m/s
1,225
1,036
85,68 m/s
0,851
c) If the turbine efficiency is 85%, calculate the power taken from the turbine shaft
4,01 MW
3,18 MW
3,34 MW
3,63 MW
4,25 MW
Transcribed Image Text:P2 L V? + az + 21 + hpompa.f =+a2 + z2 + h¢arbing + hx,toplam hk,sûrekli= f.5 2g 2g pg 2g pg z/1ẠM (gH)3/4 Wmil Nsp hx.yerel =K 2, hx,toplam= hx,sûrekli + hx yeret Протра %3D 2g 1/2 wWmil Nst p1/2(gH)5/4 HB 一() ())G)第-()) Wmit,B _ PB (@B Wmil,A PA @A %3D HA Wmil = pgHỳncürbin %3D WA DA Wmil = prwv(V, – rw)(1 – cosß) APelton turbine with a 1.75 m impeller radius has a nozzle with a mouth diameter of 12 cm. Since the optimum rotational speed of the impeller is n=250 rpm to generate maximum power from this Pelton turbine, which is used to generate hydroelectric power; (The rotation angle of the turbine blades is given a B=165°) a) Find the velocity of the water jet. b) Calculate the volumetric flow rate of the flow through the turbine in m^3/s. 91,63 m/s 95,71 m/s 1,457 2,012 82,37 m/s 102,78 m/s 1,225 1,036 85,68 m/s 0,851 c) If the turbine efficiency is 85%, calculate the power taken from the turbine shaft 4,01 MW 3,18 MW 3,34 MW 3,63 MW 4,25 MW
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