A water pump is used to pump water from one large reservoir to another large reservoir...
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A water pump is used to pump water from one large reservoir to another large reservoir that is at a higher elevation. The free surfaces of both reservoirs are exposed to atmospheric pressure, as sketched in Fig. P14-45. The dimensions and minor loss coefficients are provided in the figure. The pump's performance is approximated by the expression Hvariable= H, - aV?, where shutoff head HO = 24.4 m of water column, coefficient a = 0.0678 m/Lpm2, available pump hlad Hvariable is in units of meters of water column, and capacity V/ is in units of liters per minute (Lpm). Estimate the capacity delivered by the pump. Answer: 11.6 Lpm = 7.85 m (elevation difference) 22-z1 = 2.03 cm (pipe diameter) KL, entrance 0.50 (pipe entrance) %3! =17.5 (valve) KL, valve = 0.92 (each elbow-there are 5) Klelbow %3! KL.. exit =1.05 (pipe exit) = 176.5 m (total pipe length) ɛ = 0.25mm (pipe roughness) V=0 Reservoir Reservoir Pump Valve FIGURE P14-45 A water pump is used to pump water from one large reservoir to another large reservoir that is at a higher elevation. The free surfaces of both reservoirs are exposed to atmospheric pressure, as sketched in Fig. P14-45. The dimensions and minor loss coefficients are provided in the figure. The pump's performance is approximated by the expression Hvariable= H, - aV?, where shutoff head HO = 24.4 m of water column, coefficient a = 0.0678 m/Lpm2, available pump hlad Hvariable is in units of meters of water column, and capacity V/ is in units of liters per minute (Lpm). Estimate the capacity delivered by the pump. Answer: 11.6 Lpm = 7.85 m (elevation difference) 22-z1 = 2.03 cm (pipe diameter) KL, entrance 0.50 (pipe entrance) %3! =17.5 (valve) KL, valve = 0.92 (each elbow-there are 5) Klelbow %3! KL.. exit =1.05 (pipe exit) = 176.5 m (total pipe length) ɛ = 0.25mm (pipe roughness) V=0 Reservoir Reservoir Pump Valve FIGURE P14-45
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Related Book For
Fundamentals of Thermodynamics
ISBN: 978-0471152323
6th edition
Authors: Richard E. Sonntag, Claus Borgnakke, Gordon J. Van Wylen
Posted Date:
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