Water is stored in an elevated reservoir. To generate power, water flows from thisreservoir down through a large conduit to a turbine and then through a similar-sizedconduit. At a point in the conduit 89.5 m above the turbine, the pressure is 172.4 kPa andat a level 5 m below the turbine, the pressure is 89.6 kPa The water flow rate is0.800ms The output of the shaft the turbine is 658 kW. The water density is 1000ke m. If the efficiency of the turbine in converting the mechanical energy gven up bythe fluid to the turbine shaft is 89 % (n =0.89).a) Draw a schematic diagram for the processb) Calculate the frictional loss in the turbine in J kg%3D

given data; pressure (P1)=172.4KPa=172.4*103Paheight above from datum(Z1)=89.5mheight below from…

Answered: Water is stored in an elevated…

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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A water pump is required to deliver 10 m2/min of water at a temperature of 27°C and the pressure is to raised from 100 kN/m2 to 300 kN/m2. Suction and delivery pipes are at 3 m and 9 m from datum with their respective diameter of pipes as 25 cm and 17 cm. Neglecting the effect of temperature on liquids, calculate the power required to drive the pump. Assume specific volume of water as 0.001 m2/kg and neglect the effect of pressure on volume.
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A small, pumped storage scheme is used to pump water to a reservoir during the night and to generate power during peak demand times in the late afternoon. The pumped storage scheme consists of a pump and an impulse turbine as shown in the figure below. 4.1 The reservoir is initially to be filled with the pump which can deliver a constant head of 36 m water. Determine the time it will take to fill the reservoir. 4.2 The reservoir is to be drained for maintenance purposes by disconnecting it from the pump and turbine. Calculate the time that it will take to drain the reservoir. 4.3 Calculate the flowrate at the pipe outlet to the impulse turbine when the water level in the reservoir is kept constant. 4.4 Calculate the head loss against friction and the hydraulic power available for case 1.3 above. D= 20 m 30 m Turbine d = 500 mm L= 100 m f = 0.008 Pump
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(b) Water is drained from a large reservoir using two horizontal pipes connected in series as shown in Figure Q3(b). The first pipe is 20 m long with 10 cm diameter, while the second pipe is 35 m long and has a 4 cm diameter. The water level in the reservoir is 18 m above the centerline of the pipe. Table Q3(b) shows the friction factor and loss coefficient for each pipe or fittings. Determine the velocity at the second pipe, discharge rate of water and the total head loss. Can you identify the material used in manufacturing the pipe? Water tank 18 m 20 m - 35 m →| Sharp edge entrance Figure Q3(b) Draining large reservoir using two horizontal pipes Table Q3(b) Condition Friction factor, f Pipe ø = 10 cm Pipe ø = 4 cm 0.0196 0.0162 Sharp edge entrance Sudden contraction Loss coefficient, K 0.50 0.46
Draw the diagram. Choose the correct answer and show complete solution.
The capacity of a certain pump is 5251 gallons per hour with a capacity of 68.54%. A city uses this pump to extract water from a water supply from a body of water where in the intake is 10.2 ft below the surface of the body of water. A 3-in S40 is used to transfer the water through a pipe with a total length of 8848 ft having a total friction loss of 222.7 (ft-lbf)/lbm. Given that the cost electrical power is 14.7 cents/kWh, what is the hourly pumping cost in cents per hour? Note that in this problem, the inlet to the pump is 35.7 ft above the surface of the body of water while the water level in the tank discharge is always 380 ft above the pump discharge Answer options: 700 557 1175 685 226
A power station with an efficiency e generates W watts of electric power and dissipates D J of heat energy each second to the cooling water that flows through it. The cooling water increases its temperature by T degrees of Celsius. Find the mass of cooling water which flows through the plant each second. Specific heat capacity of water cw = 4,184 J/kgC e = 0.2W = 4.9 x 108 wattsD = 2.5 x 108 JT = 4 C Enter value in tons (1 ton = 1000 kg).Enter two digits after decimal point.
The pump in the figure compresses the unit mass of water from 10 kPs pressure to 4 MPa. The pump is adiabatic and its efficiency is 0.75. Calculate the actual job and reversible work of the pump.
The centrifugal pump is operating under steady flow condition delivers 2270 kg/min of water from an initial pressure of 82740 Pa to a final pressure of 275800 Pa. The diameter of the inlet pipe to the pump is 15.24 cm and the diameter of the discharge pipe is 10.16 cm. Calculate the work of the system in kJ/ min.
A compressor is to be used to draw air from the outdoors where the conditions are 26.5 C and 100.04 kPa. The desired volume flowrate is 0.28 cubic meter per second. The air will pass through a duct with a diameter of 14 cm. The vertical height of the duct is 11.7 m. If the efficiency is 88.0 %, determine the required power in W. Assume a friction factor of 0.023.
Water enters a pump at 350 kPa at a rate of 1 kg/s. The water leaving the pump enters a turbine in which the pressure is reduced and electricity is produced. The shaft power input to the pump is 1 KW snd the shaft power output the turbine is 1 kW. Both the pump and turbine are 90% efficient. If the elevation and velocity of the water remain constant through out the flow and irreversible headloss is 1 m, the pressure of water in kPa at the turbine exit is A. 131 B. 129 C. 126 D. 127 With F.B.D

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