At its optimum point ofcaines.operation, a given centrifugal pump with an impeller diameter of 50 cm delivers 3.2 m³/s of water at a2head of 25 m when rotating at 1450 rpm and power of 955 kW. If a homologous pump with an impellerdiameter of 80 cm rotates at 1200 rpm, what would be the discharge, head, shaft break power andPH₂

Answered: Image /qna-images/answer/0cb413bd-8cb6-44ff-8fe3-5efaa42c37a9.jpg

Answered: At its optimum point of caines.…

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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This course EHide block A centrifugal pump with the following impeller dimensions is used to pump water. The pump is running at 1000 rpm. The ideal head rise through the pump is 190 ft. b2 Poz 72 by The parameters of the impeller are as follows: r2= 9in, b2=3in, B2= 31° Take g= 9.81 m/s23 32.2 ft/s2 pw = 998 kg/m3 = 1.94 Slug/ft. Determine the theoretical flow rate in gpm Choose.. Determine the theoretical Power shaft in (hP) Choose...
EX1: Given are the following data for a commercial centrifugal water pump: r1 =10 cm, rz = 17.5 em, B1 =30°, B2 =20°, speed =1440 r/min. Estimate (a) the design point discharge, (b) the water horsepower, and (c) the head if bs = bz = 4.4 cm.(Hint. design point discharge, i.e €:=90°)
A single stage centrifugal pump has an impeller of 250 mm diameter which rotates at 1,800 rpm and lifts 60 lit/sec to 25 m with an efficiency of 70%. Obtain the number of stages and diameter of each impeller of a similar multi-stage pump to lift 75 lit/sec to 175 m at 1,500 rpm. (8 stages ; 280 mm dia)
EX1: Given are the following data for a commercial centrifugal water pump: r1 =10 cm, r2 = 17.5 cm, By =30°, B2 =20°, speed =1440 r/min. Estimate (a) the design point discharge, (b) the water horsepower, and (c) the head if by = b2 = 4.4 cm.(Hint. design point discharge, i.e 11=90°)
answer first item only
An acceptance test was conducted on a centrifugal pump having a suction pipe 25.4 cm in diameter and a discharge pipe 12.7 cm in diameter. Flow was 186 m³/hr of clear cold water. Pressure at suction was 114.3 mmHg vac and discharge pressure was 107 kPag at a point 91 cm above the point where the suction pressure was measured. Input to the pump was 15 hp. a. Determine the pump efficiency b. If the pump runs at 1750 rpm, what net flow, head, and brake hp would be developed and required if the pump speed were increased to 3500 rpm? Assume constant efficiency.
A centrifugal pump running at 750r.p.m. discharges water at 0. Im3/s against a head of 10 m at its best efficiency. A second pump of the same homologous series, when working at 500r.p.m., is to deliver water at 0.05m3/s at its best efficiency. What will be the design head of the second pump and what is the scale ratio between the first and the second?
i need the answer quickly
A centrifugal pump is driven by a motor. The performance of the pump reveals the folowing information: Power input to the pump by the motor (kW): 0.5, 0.7, 0.9, 1.0, 1.2 Power input to the fluid by the pump (kW): 0.3, 0.55, 0.7, 0.9, 1.0 Plot the efficiency curve. The efficiency of a pump is a function of the flow rate. Assume that the flow-readings corresponding to to power data points are equally spaced.
A centrifugal pump delivers 60 litres of water per second to a tank situated at a height of 20 metres. If the overall efficieney of the pump is 70%, find the power required for the pump. (Ans. 16-8 kW) 1.
a dc driven pump at 100rpm delivers a 30 liters per second of water at 40 c against a total pumping head of 27m with a pump efficiency of 60%. barometer pressure is 758mmHG abs. what pumping speed and capacity would result if the the pump were increased to produce a pumping head of 36m assuming no change in efficiency.
1(C) A centrifugal pump has an impeller of diameter (D) of 300mm. When pumping 20°C water at a fixed rotational speed of 1500 RPM, the measured flow rate Q and pressure rise Pare given by the manufacturer as follows: Flow Rate (L/s) 13 19 25 32 38 44 Pressure Rise (Bar) 2.5 2.4 2.35 2.2 2.0 1.6 It is desired to use the same pump, running at 945 RPM, to pump 20°C water at 22L/s. According to your dimensionless correlation, what pressure rise p is expected?

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