PUMP SYSTEM – SYSTEM CURVE AND NPSHThe pumping system shown below consists of a suction pipe of length 3m and diameter80mm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a losscoefficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 and 1.0,respectively; suction and delivery pipe friction factor f = 0.007Darcy. A Robuschi 150-500pump rotates at 1470 rpm and the desired flow rate is a minimum of 200 m3/h.SUCTION PIPEComplete the following tasks:1. Draw the system curve as described above on the Roubuschi pump curve datasheet supplied. Work in increments of Q 50m3/h starting at 0 (7-point curve)2. Would you advise the client to select the p400 or ¢460 impeller?Give two reasons for your answer.If the 400 impeller is used:Assume:the gauge pressure in the suction tank at 115 kPa,the vapour pressure of the water at its average operating temperature at 20Csuction height as 1.5 m.3. Is the pump likely to cavitate? Support answer with a NPSH calculation approach.4. Describe two steps that could be taken to reduce the likelihood of cavitation.

d=80mm=0.08m.....same for delivery and suctionf=0.007Total length = 3m+6m=9m

Answered: 80mm; de coefficient respective

Engineering

Mechanical Engineering

80mm; de coefficient respective

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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