The radial-flow pump in Fig. 14-19a is used to transfer water from the lake at A...

  

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The radial-flow pump in Fig. 14-19a is used to transfer water from the lake at A into a large storage tank B. This is done through a 3-in.- diameter pipe that is 300 ft long and has a friction factor of 0.015. The manufacturer's data for the performance of the pump is given in Fig. 14-196. Determine the flow if this pump is selected with a 6-in.- diameter impeller to do the job. Neglect minor losses. 75 ft Datum, A (a) 300 200 1756 in. dia f70%25 E 150 ssin 125 2 too - 75 125% 70% 65% 25 bhp 20 bhp 18 Nap t0 bhp 25 0.20 040 0.60 0,80 1.00 L.20 140 160 Flow Q (n'/s) a- 1750 RPM (b) 2(32.2 ft/s) Fig. 14-19 Compute the flow rate Q and the total head, Hp, for a 5.5 inch diameter of the pump (see Figure 14-19), a difference in elevation of 50 feet (instead of 75 feet). Consider separately two pipe diameters: 2 inches and 4 inches (instead of 3 inches). The radial-flow pump in Fig. 14-19a is used to transfer water from the lake at A into a large storage tank B. This is done through a 3-in.- diameter pipe that is 300 ft long and has a friction factor of 0.015. The manufacturer's data for the performance of the pump is given in Fig. 14-196. Determine the flow if this pump is selected with a 6-in.- diameter impeller to do the job. Neglect minor losses. 75 ft Datum, A (a) 300 200 1756 in. dia f70%25 E 150 ssin 125 2 too - 75 125% 70% 65% 25 bhp 20 bhp 18 Nap t0 bhp 25 0.20 040 0.60 0,80 1.00 L.20 140 160 Flow Q (n'/s) a- 1750 RPM (b) 2(32.2 ft/s) Fig. 14-19 Compute the flow rate Q and the total head, Hp, for a 5.5 inch diameter of the pump (see Figure 14-19), a difference in elevation of 50 feet (instead of 75 feet). Consider separately two pipe diameters: 2 inches and 4 inches (instead of 3 inches).

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Calculate the pump head Apply Bemoulliss equation V Az H Vi P2z h 2g 2g y 000H 0075 hgicton H ... View the full answer