Water at 50oF ( γ = 62.4 lbf/ft3 ; pv = 0.1733 psia) is to pump between open reservoir A and B whose surfaces are at elevations 5910 ft and 6060 ft, respectively (patm = 11.8 psia). The water is to be delivered at 20 cfs through a 24-in diameter pipe of length 2000 ft. Assume pipe friction factor f = 0.03. (a) Find the specific speed of the most suitable pump if the speed of operation is to 600 rpm. (b) If this pump is installed 10 ft above the water surface of reservoir A with suction pipe total length 300 ft will it be safe against cavitation? (c) What maximum elevation above water surface of reservoir A the pump can be installed without pump cavition? Pump NPSHR is 8 ft.
Water at 50oF ( γ = 62.4 lbf/ft3 ; pv = 0.1733 psia) is to pump between open reservoir A and B whose surfaces are at elevations 5910 ft and 6060 ft, respectively (patm = 11.8 psia). The water is to be delivered at 20 cfs through a 24-in diameter pipe of length 2000 ft. Assume pipe friction factor f = 0.03. (a) Find the specific speed of the most suitable pump if the speed of operation is to 600 rpm. (b) If this pump is installed 10 ft above the water surface of reservoir A with suction pipe total length 300 ft will it be safe against cavitation? (c) What maximum elevation above water surface of reservoir A the pump can be installed without pump cavition? Pump NPSHR is 8 ft.
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