Q1:A) A centrifugal pump is to be operating with total head of (350 kpa) and discharge of 1.2 m3/min, compute the water power and motor power .assuming efficiency of 60% for pump and 85% for motor. And if the cost of the current is 2.6 cent per kw. find

Q1:A) A centrifugal pump is to be operating with total head of (350 kpa) and discharge of 1.2 m3/min, compute the water power and motor power .assuming efficiency of 60% for pump and 85% for motor. And if the cost of the current is 2.6 cent per kw. find

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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.
A small hydro electric power plant utilizing two (2) Pelton turbines and a single main penstock serving water to two nozzles for respective turbines. If both turbines are operated at the same time with same efficiency of 92% under the same net head of 2314 ft, same speed of 360 rpm and same flow rate. Determine the specific speed if the flow rate in the main penstock is 263 ft3 /s.
The system presented on Figure 1 pumps water from the left reservoir to ensure a water in the elevated basin stays level. Knowing that the offset from water-surface to water-surface 7.5m and the water temperature is 5oC, you must: a) Determine the out-flow from the basin's orifice; b) Determine the efficiency of the pump (n) feeding the basin if the pump's absorbed power is 2550W; Consider that hs=0 c) Determine how long it will take for the basin to fully empty if the pump ceases to function. Lconduit 20m; Chw-130; D=0.15m 1m h Dorifice =0.075m; h=1.2m; Dimension of the rectangular basin: 3m x 2m *The orifice coefficient can be presumed to be 0.9 Figure 1
Determine the shaft horsepower for an 80% efficient pump to discharge 30L/s through the system. The system losses, exclusive of pump losses, are 12V2/2g and H = 16m. Ans: 8.75hp H 150mm dia
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.
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For water supply of a town, water is pump from a river 3 km away into a reservoir is 20 m. The population of the town is 50000 and per capita water demand is 120 litre/day. If the pump are to be operate for a total of 8 hours and the efficiency of pump is 80%, determined the horse power of the pump. Assume friction factor as 0.03, the velocity of flow as 2 m/s, and maximum daily demand as 1.5 times the average daily demand.
For water supply of a town, water is pump from a river 3 km away into a reservoir is 20 m. The population of the town is 50000 and per capita water demand is 120 litre/day. If the pump are to be operate for a total of 8 hours and the efficiency of pump is 80%, determined the horse power of the pump. Assume friction factor as 0.03, the velocity of flow as 2 m/s, and maximum daily demand as 1.5 times the average daily demand.