A centrifugal pump of 37 cm diameter is tested using water at 2130 rev/min and the results obtained are tabulated below: Determine the: (a) (b) Q (L/s) H (m) Power (kW) (c) 0 103.6 100 The best efficiency point. 56.6 113.3 169.9 226.5 283.2 103.6 103.6 100.6 91.4 120 153 190 246 246 67.1 The maximum possible discharge in m³/s estimated based on the results tabulated above. The above pump is scaled up to 46 cm diameter operating in water at BEP at 1760 rev/min. The measured NPSH is 4.88 m and the friction loss between the inlet and pump is 6.71 m. Will it be sufficient to avoid cavitation if the pump inlet is placed 2.74 m below the surface of a sea level reservoir? The barometric pressure is 740 mm Hg and the vapour pressure of water at the prevailing temperature is 26 mm Hg. The specific gravity of Hg is 13.55.

A centrifugal pump of 37 cm diameter is tested using water at 2130 rev/min and the results obtained are tabulated below: Determine the: (a) (b) Q (L/s) H (m) Power (kW) (c) 0 103.6 100 The best efficiency point. 56.6 113.3 169.9 226.5 283.2 103.6 103.6 100.6 91.4 120 153 190 246 246 67.1 The maximum possible discharge in m³/s estimated based on the results tabulated above. The above pump is scaled up to 46 cm diameter operating in water at BEP at 1760 rev/min. The measured NPSH is 4.88 m and the friction loss between the inlet and pump is 6.71 m. Will it be sufficient to avoid cavitation if the pump inlet is placed 2.74 m below the surface of a sea level reservoir? The barometric pressure is 740 mm Hg and the vapour pressure of water at the prevailing temperature is 26 mm Hg. The specific gravity of Hg is 13.55.

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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