For water supply of a town, water is pumped from a river 4km away into a reservoir. The maximum level difference of river and reservoir is 20m. Town population is 50,000 and per capita water demand is 120 lpcd. If the pumps operate for a total of 8hrs and pump efficiency is 60%, calculate pump B.H.P Assume friction factor as 0.0075 and pipe velocity as 2m/s and maximum daily demand as 1.6 times avg. daily demand.

For water supply of a town, water is pumped from a river 4km away into a reservoir. The maximum level difference of river and reservoir is 20m. Town population is 50,000 and per capita water demand is 120 lpcd. If the pumps operate for a total of 8hrs and pump efficiency is 60%, calculate pump B.H.P Assume friction factor as 0.0075 and pipe velocity as 2m/s and maximum daily demand as 1.6 times avg. daily demand.

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter14: Ocean Thermal Energy Conversion And Ocean Salinity Gradient Energy

Section: Chapter Questions

Problem 14P

See similar textbooks

Similar questions

A reservoir A with elevation 30m connected with a pump to rise the water into two reservoirs B and C 90m and 60 m respectively the amount of flow from J to B is equal 0.11 m/sec use the following data to determine the flow in each pipe and the power of the pump: LAJ 450 m, DaJ = 300 mm, LJB= 300 m, DJB = 200 m, Q JB = 0. m'/sec, LJc 600, D Jc = 150 mm,f (all Pipes) 0.02
It is proposed to build a three- stage centrifugal pump to deliver 4000 kg/min of water at a speed of 900 rpm under a total manometric head of 70 m. The vanes are to be radial at inlet and are to be curved backwards at exit at an angle of 45°. Assuming manometric efficiency of 84% and overall efficiency of 75% and considering that vane thickness accounts for 8% of circumferential area. The velocity of flow may be assumed constant at 2.5 m/sec. The h.p. input necessary is ؟
A pump is used to raised water to a reservoir through 800 m. long of 20 cm diameter with Cw of Hazen-William’s Equation equal to 110. If the pipe is to be replaced with a new one having the same length but with a diameter of 25 cm and Cw = 130, determine the power save if the flow is to be maintained at 100 liters per second. Draw the approximate EGL and HGL.
Calculate the required pump power since the velocity of the water in the pipe is v=1.91 m/s pwater=1000kh/m^3 μ=1.307x10^-3
A pump is used to raised water to a reservoir through 1000 m. long of 20 cm diameter with Cw of Hazen-William's Equation equal to 100. If the pipe is to be replaced with a new one having the same length but with a diameter of 25 cm and Cw= 120, determine the power save if the flow is to be maintained at 75liters per second. Draw the approximate EGL and HGL
Q1) If the flow rate through a 10 cm diameter wrought iron pipe is 0.04 m3/s, and the difference in elevation H of the two reservoirs is 77. Calculate the power of the pump. Assume the pump efficiency is 85%.
5.10 The water is supplied at the rate of 3 m3 per minute from a height of 4 m to a hydraulic ram, which raises 0.3 m3/minute to a height of 30 m from the ram. The length and diameter of the delivery pipe is 100 m and 70 mm respectively. Determine the D' Aubuisson's efficiency of the hydraulic ram if the co-efficiency of friction f = .009.
A swimming pool containing water is to be emptied by unplugging a 25 m length of horizontal pipe with anopening of 3 cm, attached to the bottom of the pool. The dimension of the pool is 8 m in diameter and 3 mhigh above the ground. Calculate for the maximum discharge rate of water in the pipe in L/s. Determine alsohow long it take to empty the swimming pool completely.
A centrifugal water pump is tested under its design flow rate Q=250 m/hr. The static pressure at the suction and discharge end of the pump are measured 1.2 bar and 8.5 bar respectively. The suction pipe is 10"- 40 and the discharge pipe is 8"- 40. The energy consumed by the pump during a test period of 30 minutes is 48.5kwhr. The geodetic head difference between suction and discharge end are 0.25m Detemine the useful head of the pump, the overall efficiency and the energy cost for pumping 10,000 m3 of water under the test operating condition. Assume nmotor-95%, Density of medium=998 kg/m-
Compute the minimum water horsepower of a pump needed to pump-out water at a rate of 300 gpm with a total head of 6 m. The pump efficiency is about 60%.
If the flow of 0.10 m3/s of water (mu = 1.31 x 10-3 Pa.s) is to be maintained in the system shown, what power must be added to the water by the pump? The pipe is made of steel and is 15 cm in diameter. Neglect minor losses. TV
Waters enter a pump through a 25 cm. dia. Pipe at 35Kpa. It leaves the pump at 140 kPa through a 15 cm. dia. pipe. If the flow rate is 150 li/sec., find the horsepower delivered to the water by the pump. Assume suction & discharge sides of pump are the same elevation.