A storage reservoir supplies water to a pressureturbine under a head of 20 m. If the flow rate is 500liters per second the head loss in the 300 mm pipesupplying the turbine is 2.5 m. Determine thepressure at the entrance of the turbine. If a negativepressure of 30 kPa exists at the 600 mm diametersection of the draft tube (exit tube) below the turbine1.5 m below the supply line, estimate the energyabsorbed by the turbine in kW neglecting lossesbetween the entrance and exit of the pipe. Find alsothe output of the turbine assuming an efficiency of85% Sample problems:1. A liquid (sp gr 2.0) is flowing in a 50 mm diameter pipe. The total energy at a givenpoint is found to be 75 J/kg. The elevation of the pipe above the datum line is 3 m,and the pressure in the pipe is 65.5 kPa. Compute the velocity of flow and thehorsepower in the stream at that point.Given:EGL = energy gradient lineV22gHGL hydraulic gradient lineE50 mm ø pipeQ• pointDatum lineE = 75 J/kg = 75 N.m/kg (1kg/9.81N) = 7.645 mZ = 3 mp = 65.5 KPa = 65.5 KN/m²D = 50 mm = 0.050 mSp. Gr. = 2.0w = 2 (9810) = 19620 N/m3 = 19.62 KN/m³%3DRequired:V and WHPSolution:V2+E =2g+ ZV265.5+19.627.645 =+32gV2= 7.645 – 6.3382gV = V(2g)(1.307) = 5.064m/swQHWHP =746WAVE19620 (4) D?(5.064)(7.645)WHP =74674625019620 (4) To00) (5.064)(7.645)1000.WHP =1.999hp%D746

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A storage reservoir supplies water to a pressure turbine under a head of 20 m. If the flow rate is 500 liters per second the head loss in the 300 mm pipe supplying the turbine is 2.5 m. Determine the pressure at the entrance of the turbine. If a negative pressure of 30 kPa exists at the 600 mm diameter section of the draft tube (exit tube) below the turbine 1.5 m below the supply line, estimate the energy absorbed by the turbine in kW neglecting losses between the entrance and exit of the pipe. Find also the output of the turbine assuming an efficiency of 85%

A storage reservoir supplies water to a pressure turbine under a head of 20 m. If the flow rate is 500 liters per second the head loss in the 300 mm pipe supplying the turbine is 2.5 m. Determine the pressure at the entrance of the turbine. If a negative pressure of 30 kPa exists at the 600 mm diameter section of the draft tube (exit tube) below the turbine 1.5 m below the supply line, estimate the energy absorbed by the turbine in kW neglecting losses between the entrance and exit of the pipe. Find also the output of the turbine assuming an efficiency of 85%

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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