It is desired to construct a hydraulic turbine for a hydraulic power plant to operate under the following conditions: discharge Q = 3.5 m3/s of water, the available net head = 290 meters, the hydraulic efficiency = 0.8, the rotating speed = 300 rpm. A Pelton wheel impulse turbine was selected with the following specifications: the bucket angle b2 = 160°, the coefficient of velocity for the nozzle is 0.98 and assume the friction coefficient k = 0.2. Determine the following: A) The brake horsepower. B) The Pelton wheel diameter in meters. O 1.01 3,790 O 3.52 6,406 2.08 10,827 1.60 4,928 O 2.70 8,328 C) The required number of Jets. 1 2 3 5 E) The computed head coefficient. 0.049 0.340 0.088 0.158 0.024 D) Jet Diameter to Wheel diameter ratio, dj/Dw. 0.158 0.049 0.024 0.340 0.088 F) The Specific Speed in M.K.S., Ns. 0.158 0.088 0.340 0.024 0.049 pa

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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It is desired to construct a hydraulic turbine for a hydraulic power plant to operate under the following
conditions: discharge Q = 3.5 m3/s of water, the available net head = 290 meters, the hydraulic efficiency
= 0.8, the rotating speed = 300 rpm. A Pelton wheel impulse turbine was selected with the following
specifications: the bucket angle b2 = 160°, the coefficient of velocity for the nozzle is 0.98 and assume the
friction coefficient k = 0.2. Determine the following:
A) The brake horsepower.
B) The Pelton wheel diameter in meters.
O 1.01
3,790
O 3.52
6,406
2.08
10,827
1.60
4,928
O 2.70
8,328
C) The required number of Jets.
1
2
3
5
E) The computed head coefficient.
0.049
0.340
0.088
0.158
0.024
D) Jet Diameter to Wheel diameter ratio, dj/Dw.
0.158
0.049
0.024
0.340
0.088
F) The Specific Speed in M.K.S., Ns.
0.158
0.088
0.340
0.024
0.049
pa
Transcribed Image Text:It is desired to construct a hydraulic turbine for a hydraulic power plant to operate under the following conditions: discharge Q = 3.5 m3/s of water, the available net head = 290 meters, the hydraulic efficiency = 0.8, the rotating speed = 300 rpm. A Pelton wheel impulse turbine was selected with the following specifications: the bucket angle b2 = 160°, the coefficient of velocity for the nozzle is 0.98 and assume the friction coefficient k = 0.2. Determine the following: A) The brake horsepower. B) The Pelton wheel diameter in meters. O 1.01 3,790 O 3.52 6,406 2.08 10,827 1.60 4,928 O 2.70 8,328 C) The required number of Jets. 1 2 3 5 E) The computed head coefficient. 0.049 0.340 0.088 0.158 0.024 D) Jet Diameter to Wheel diameter ratio, dj/Dw. 0.158 0.049 0.024 0.340 0.088 F) The Specific Speed in M.K.S., Ns. 0.158 0.088 0.340 0.024 0.049 pa
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