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4) State briefly why a Pelton turbine is an impulse turbine.

4) State briefly why a Pelton turbine is an impulse turbine.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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I just need part 4 from the question please

 

Assignment 10.1 A Pelton turbine is designed to develop power having a wheel diameter D = 2.5 m, a water head at the inlet of the nozzle of H = 500 m and a flow rate of Q = 3 m³/s, with a rotating speed N = 290 rpm. The nozzle efficiency nn = 0.95, the relative flow exiting from the bucket is such that a = 165° and the velocity coefficient of the bucket is Cyp = 0.96. Assume that the mechanical and volumetric efficiencies are respectively nm = 0.9 and 7, = 0.96. 1) Calculate the different velocity components (U,V,W,Vµ, Wy, V,) and draw the velocity diagrams at the inlet and outlet of the bucket. 2) Determine: i) the hydraulic efficiency nh, ii) the output power P;, iii) the output torque T; and iv) the jet diameter dn. 3) Calculate the maximum hydraulic efficiency h.max and the corresponding power shaft and torque 4) State briefly why a Pelton turbine is an impulse turbine. Bucket Top view Jet a U Nozzle W2
Transcribed Image Text:Assignment 10.1 A Pelton turbine is designed to develop power having a wheel diameter D = 2.5 m, a water head at the inlet of the nozzle of H = 500 m and a flow rate of Q = 3 m³/s, with a rotating speed N = 290 rpm. The nozzle efficiency nn = 0.95, the relative flow exiting from the bucket is such that a = 165° and the velocity coefficient of the bucket is Cyp = 0.96. Assume that the mechanical and volumetric efficiencies are respectively nm = 0.9 and 7, = 0.96. 1) Calculate the different velocity components (U,V,W,Vµ, Wy, V,) and draw the velocity diagrams at the inlet and outlet of the bucket. 2) Determine: i) the hydraulic efficiency nh, ii) the output power P;, iii) the output torque T; and iv) the jet diameter dn. 3) Calculate the maximum hydraulic efficiency h.max and the corresponding power shaft and torque 4) State briefly why a Pelton turbine is an impulse turbine. Bucket Top view Jet a U Nozzle W2
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