A 37-cm-diameter centrifugal pump, running at 2140 rev/min with water at 20°C produces the following performance data: Q, m3/s: 0.0 0.05 0.10 0.15 0.20 0.25 0.30 H, m: 105 104 102 100 95 85 67 P, kW: 100 115 135 171 202 228 249 η 0% 44% 74% 86% 92% 91% 79% (a) Determine the best efficiency point. (b) Plot CHversus CQ. (c) If we desire to use this same pump family to deliver 7000 gal/min of kerosene at 20°C at an input power of 400 kW, what pump speed (in rev/min) and impeller size (in cm) are needed? What head will be developed?

A 37-cm-diameter centrifugal pump, running at 2140 rev/min with water at 20°C produces the following performance data: Q, m3/s: 0.0 0.05 0.10 0.15 0.20 0.25 0.30 H, m: 105 104 102 100 95 85 67 P, kW:...

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A 37-cm-diameter centrifugal pump, running at 2140 rev/min with water at 20°C produces the following performance data:

Q, m3/s:	0.0	0.05	0.10	0.15	0.20	0.25	0.30
H, m:	105	104	102	100	95	85	67
P, kW:	100	115	135	171	202	228	249
η	0%	44%	74%	86%	92%	91%	79%

(a) Determine the best efficiency point. (b) Plot C_Hversus C_Q. (c) If we desire to use this same pump family to deliver 7000 gal/min of kerosene at 20°C at an input power of 400 kW, what pump speed (in rev/min) and impeller size (in cm) are needed? What head will be developed?

Answered Same Day Dec 24, 2021

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David answered on Dec 24 2021

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A 37-cm-diameter centrifugal pump, running at 2140 rev/min with water at 20°C produces the following performance data: Q, m3/s: 0.0 0.05 0.10 0.15 0.20 0.25 0.30 H, m: 105 104 102 100 95 85 67 P, kW:...

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