A Pelton wheel works under a gross head of 450 m. It is estimated that 20% of head is lost in overcoming the friction in penstock. The jet discharge issued by the nozzles is 2 m/s. The buckets have the angle of deflection of 165°. Assuming coefficient of velocity as 0.97, find : (i) Power given by water to runner. (ii) Hydraulic efficiency of the runner. Assume, speed ratio as 0.45.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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W2
V2
Vr2
Outlet velocity
dlagram
V2
165°
C
Vr1-
V, =V,
w1
Transcribed Image Text:W2 V2 Vr2 Outlet velocity dlagram V2 165° C Vr1- V, =V, w1
A Pelton wheel works under a gross head of 450 m. It is
estimated that 20% of head is lost in overcoming the friction
in penstock. The jet discharge issued by the nozzles is
2 m°/s. The buckets have the angle of deflection of 165°.
Assuming coefficient of velocity as 0.97, find:
(i) Power given by water to runner.
(ii) Hydraulic efficiency of the runner.
Assume, speed ratio as 0.45.
Transcribed Image Text:A Pelton wheel works under a gross head of 450 m. It is estimated that 20% of head is lost in overcoming the friction in penstock. The jet discharge issued by the nozzles is 2 m°/s. The buckets have the angle of deflection of 165°. Assuming coefficient of velocity as 0.97, find: (i) Power given by water to runner. (ii) Hydraulic efficiency of the runner. Assume, speed ratio as 0.45.
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