The water level in the forebay of a hydroelectric power plant is at an elevation of 150 m above the nozzle of a Pelton wheel. The length and diameter of steel penstock with absolute roughness of 0.05 mm are 1250 m and 0.5 m, respectively. Determine net head if loss coefficients for entrance and the nozzle are 0.5 and 0.04, respectively and the discharge through a nozzle of 0.12 m diameter is 0.6 m³/s.

The water level in the forebay of a hydroelectric power plant is at an elevation of 150 m above the nozzle of a Pelton wheel. The length and diameter of steel penstock with absolute roughness of 0.05 mm are 1250 m and 0.5 m, respectively. Determine net head if loss coefficients for entrance and the nozzle are 0.5 and 0.04, respectively and the discharge through a nozzle of 0.12 m diameter is 0.6 m³/s.

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

See similar textbooks

Similar questions

The following system is fed by a centrifugal pump. The piping is constructed from smooth plastic of OD 55 mm, wall thickness 2.5 mm. The minor losses for the system prior to the pump are given by KL = 12.0. The system curves for this pump are attached. If the flowrate is reduced to 1.4 m3/hr, and the upstream head requirement were 17 m, what would the electrical power requirement of the pump be?
A pump is fitted to 100 m pipeline that connects reservoir A reservoir B. The diameter of the pipe is 200 mm and is characterized by a fri factor of 0.02. The design discharge is 0.15 m³/s and the pump. Assuming th minor losses are 20% of friction losses, determine the head the pump must p
6. A 6 250 m long, 914 mm (inside diameter) cast iron pipeline connects an upstream reservoir (water surface elevation 521.3 m) to a downstream reservoir (water surface elevation 512.3 m). A discharge valve at the downstream end is used to control flow; when this valve is fully open, the measured discharge in the pipeline is 840 L/s under the naturally available head difference. (a) Assuming fully developed turbulent flow and that all other local losses are negligible, estimate the loss coefficient k for the fully open valve.(b) Because of increasing urban development, the flow under the natural head difference is considered to be inadequate and it is proposed to increase this flow with pumping. The head-capacity curve for thepump can be approximated by the equation H = 8 – 3.5Q2 in which H is the total dynamic head on the pump (in m) and Q is the discharge (in m3/s). What is the discharge that can now be obtained from the system where the pump is installed at a cross-section of the…
The horizontal pipe length is 180 m and the vertical pipe length is 24 m in the fire protection system, which is formed with a water tower and pipeline, 1 threaded 90 ° elbow (Kd = 0.9) on the pipeline and 1 slide valve at the pipe outlet (fully open position Kv = 0.2). Since the pipe material is cast iron and its diameter is 4 ”(101.6 mm), determine the maximum flow rate in the pipe considering the losses. Assume that the water level in the tower remains constant and the kinematic viscosity of the water is 1.124x10-6 m2 / s. Show your readings by drawing on the attached Moody diagram.
A pump is being utilized to deliver a flow rate of 500 li/sec from a reservoir of surface elevation of 65 m to another reservoir of surface elevation 95 m. the total length and diameter of the sunction and discharge pipe are 500 mm,1500 m and 300 mm, 1000 m respectively. assumme a head lose of 2 meters per 100 m length of the sunction pipe and 3m per 100 m length of the discharge pipe. what is the required horsepower of the pump?
The distribution system requires to lift water to an area with an average elevation of 90 mamsl from the pumping station at 35 mamsl. The area has a demand requirement of 30 MLD and the minimum pressure head requirement is 20 m-head. The pipe which will serve the area is 500 mm with C-value of 90 and length of 3000 m. Determine the following: a) total head loss along the pipe in meter, b) the head of pump required in meter, and c) the power required by the pump with an efficiency of 80% in kilowatt. Note: Theaverage water surface level of the reservoir which supports the pumping station is 5 m.
A 230-m-long pipeline delivers 20◦C water to a storage reservoir located downstream. The pipeline is galva-nized with an average roughness height of 0.2 mm. An axial pump is used to pressurize upstream water. Thewater surface in the reservoir is located 18 m above the centerline of the pump. The pump discharges waterat an absolute pressure of 400 kPa and a volume flow rate of 50 L/s. Calculate a diameter of pipe requiredto achieve such an operating condition. If needed, use the Moody diagram on the last page, or one can solvethe Colebrook equation using, for example, Matlab.
04: Three pipes of diameters 300 mm, 200 mm and 400 mm and lengths 450 m, 255 m and 315 m, respectively, are connected in series. The difference in water surface levels in two tanks is 18 m. Determine the rate of water flow if coefficients of friction are 0.0075, 0.0078 and 0.0072, respectively, considering: (a) with minor losses, (b) without (neglecting) ‘minor losses.
Water at 20°C is transported from Tank 1 to Tank 2 at a rate of 0.5m 3 /s via a copperpipe of length 4m and diameter 0.1m. Consider minor losses of a sharp-edged pipe inlet and exit as wellas a fully open globe valve. Determine the following:a) head loss due to friction, hf, through the pipe (estimate hf with Darcy-Weisbach and f with MoodyChart)b) the total head loss, h L, from Tank 1 to Tank 2
A pump is installed with a suction pipe of 200mm and a delivery pipe of 150mm (λ=0.02) in diameter to pump 0.08m3/s. The delivery pipe is 280m long. The elevation difference between the supply reservoir and the receiving reservoir is 20m. The cavitation parameter σ is 0.12 and the installation suffers a loss of 1.4m loss in the suction side. Determine the allowable height between the pump intake and the water surface elevation in the supply tank. The atmospheric pressure is 101.35kPa and the vapor pressure is 1.79kPa.
reservoir with water pressurized pipe diameter is 5 cm. The head loss in the system as given by hL= 5V^ 2/ 2g. The height between the water surface and the pipe outlet is 400 m. A discharge of 0.11 m3 /s is needed. What must the pressure in the tank be achieve such a flow rate? Assume a turbulent flow.
Water flows from a large reservoir down a straight pipe of 2500 m length and 0.2 m diameter. At the end of the pipe, at a point 500 m below the surface of the reservoir, the water exits to atmosphere with a velocity Ve. If the friction factor for the pipe is 0.03, and the loss coefficient for the pipe entrance is 1.0, calculate Ve.