QUESTION 01 1.1 In a hydro-electric scheme/plant five (5) Pelton wheels are to be used under the following design and installation conditions: 30 MW Output power required 245 m Gross vertical head 375 rev/min Rotational speed of the shaft 2 off (two) Number of jets per Pelton Wheel 81,5 % Maximum operating overall efficiency Unknown 12 Head lost to friction in pipeline not exceed 0,46 The ratio of the bucket speed to the jet speed 0,85 The relative velocity at exit to the relative velocity at entry 0.98 Coefficient of velocity 165° Given that the biade deflect the water at angle Determine: 1.1.1 The overall flow rate throughout the system. 1.1.2 The actual velocity of each jet. 1.1.3 The diameter of each jet. 1.1.4 The diameter of each wheel. 1.1.5 The hydraulic efficiency of the turbine. 1.1.6 The value of the absolute velocity of the water as it leaves the turbine buckets ( .1.7 The percentage of the input power that remains as kinetic energy of the water at

QUESTION 01 1.1 In a hydro-electric scheme/plant five (5) Pelton wheels are to be used under the following design and installation conditions: 30 MW Output power required 245 m Gross vertical head 375 rev/min Rotational speed of the shaft 2 off (two) Number of jets per Pelton Wheel 81,5 % Maximum operating overall efficiency Unknown 12 Head lost to friction in pipeline not exceed 0,46 The ratio of the bucket speed to the jet speed 0,85 The relative velocity at exit to the relative velocity at entry 0.98 Coefficient of velocity 165° Given that the biade deflect the water at angle Determine: 1.1.1 The overall flow rate throughout the system. 1.1.2 The actual velocity of each jet. 1.1.3 The diameter of each jet. 1.1.4 The diameter of each wheel. 1.1.5 The hydraulic efficiency of the turbine. 1.1.6 The value of the absolute velocity of the water as it leaves the turbine buckets ( .1.7 The percentage of the input power that remains as kinetic energy of the water at

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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