(b) Parallel-connected four centrifugal pumps each have a specific speed of 28 and operate at 1400 rpm while delivering water with outlet velocity of flow of 3 m/s. The impeller outer diameter and blade angle at outlet are 0.23 m and 26° to the tangent respectively. The four pumps are replaced by series-connected double centrifugal pumps to meet the same duty (same head and flow rate) with a specific speed of 31 for each pump. The outer diameter of the impeller is 0.5 m and passage width is 0.04 m. At exit, the blades are backward curved and making an angle of 15° with tangent. Determine the manometric efficiency of each pump for the in series- connected pump system?
(b) Parallel-connected four centrifugal pumps each have a specific speed of 28 and operate at 1400 rpm while delivering water with outlet velocity of flow of 3 m/s. The impeller outer diameter and blade angle at outlet are 0.23 m and 26° to the tangent respectively. The four pumps are replaced by series-connected double centrifugal pumps to meet the same duty (same head and flow rate) with a specific speed of 31 for each pump. The outer diameter of the impeller is 0.5 m and passage width is 0.04 m. At exit, the blades are backward curved and making an angle of 15° with tangent. Determine the manometric efficiency of each pump for the in series- connected pump system?
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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Transcribed Image Text:(b) Parallel-connected four centrifugal pumps each have a specific speed of 28 and operate at 1400
rpm while delivering water with outlet velocity of flow of 3 m/s. The impeller outer diameter
and blade angle at outlet are 0.23 m and 26° to the tangent respectively. The four pumps are
replaced by series-connected double centrifugal pumps to meet the same duty (same head and
flow rate) with a specific speed of 31 for each pump. The outer diameter of the impeller is 0.5
m and passage width is 0.04 m. At exit, the blades are backward curved and making an angle of
15° with tangent. Determine the manometric efficiency of each pump for the in series-
connected pump system?
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