A centrifugal pump with backward-curved blades has the following measured performance when tested with water at 20°C: Q, gal/min | 0 | 400 | 800 123 115 108 101 1200 | 1600 | 2000 | 2400 Н, ft 93 81 62 P, hp 30 36 40 44 47 48 46 (a) Estimate the best efficiency point and the maximum efficiency. (b) Estimate the most efficient flow rate, and the resulting head and brake horsepower, if the diameter is doubled and the rotation speed increased by 50 percent.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A centrifugal pump with backward-curved blades has the
following measured performance when tested with water at
20°C:
Q, gal/min | 0 | 400 | 800
123 115 108 101
1200 | 1600 | 2000 | 2400
Н, ft
93
81
62
P, hp
30
36
40
44
47
48
46
(a) Estimate the best efficiency point and the maximum
efficiency. (b) Estimate the most efficient flow rate, and the
resulting head and brake horsepower, if the diameter is
doubled and the rotation speed increased by 50 percent.
Transcribed Image Text:A centrifugal pump with backward-curved blades has the following measured performance when tested with water at 20°C: Q, gal/min | 0 | 400 | 800 123 115 108 101 1200 | 1600 | 2000 | 2400 Н, ft 93 81 62 P, hp 30 36 40 44 47 48 46 (a) Estimate the best efficiency point and the maximum efficiency. (b) Estimate the most efficient flow rate, and the resulting head and brake horsepower, if the diameter is doubled and the rotation speed increased by 50 percent.
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