P1). A centrifugal pump, of 32 diameter, having the characteristics shown in Fig prob. 8 is...
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P1). A centrifugal pump, of 32" diameter, having the characteristics shown in Fig prob. 8 is used to pump water at 60F between two large open tanks through 1500 ft of 16-in.- diameter pipe. The pipeline contains 5 regular flanged elbows, two check valve, and a fully open globe valve. Assume the friction factor for the 1500-ft section of pipe f= 0.020. Other minor losses are negligible. a) If the static head (difference in height of fluid surfaces in the two tanks) is 150 ft, what is the expected flowrate? Do you think this pump is a good choice? Explain. b) The pump inlet is located 2 ft above the open water surface, the head loss between the water surface and the pump inlet is 16 ft of water. Would you expect cavitation in the pump to be a problem? Assume standard atmospheric pressure. Explain how you arrived at your answer. Total head. It 800 700 36-in dia. 600 500 400 300 #= 1170 m/'min 200 28-in dia. -65% 72% 584 328 NPSH 16 85% 1500 bhp 87% 88% 3000 bbp 2000 bhp 12 20 24 U.S. gallons per minute x 1000 Figure P 1 87%. 2500 bhp 3500 bhp 28 50 NPSH, At P1). A centrifugal pump, of 32" diameter, having the characteristics shown in Fig prob. 8 is used to pump water at 60F between two large open tanks through 1500 ft of 16-in.- diameter pipe. The pipeline contains 5 regular flanged elbows, two check valve, and a fully open globe valve. Assume the friction factor for the 1500-ft section of pipe f= 0.020. Other minor losses are negligible. a) If the static head (difference in height of fluid surfaces in the two tanks) is 150 ft, what is the expected flowrate? Do you think this pump is a good choice? Explain. b) The pump inlet is located 2 ft above the open water surface, the head loss between the water surface and the pump inlet is 16 ft of water. Would you expect cavitation in the pump to be a problem? Assume standard atmospheric pressure. Explain how you arrived at your answer. Total head. It 800 700 36-in dia. 600 500 400 300 #= 1170 m/'min 200 28-in dia. -65% 72% 584 328 NPSH 16 85% 1500 bhp 87% 88% 3000 bbp 2000 bhp 12 20 24 U.S. gallons per minute x 1000 Figure P 1 87%. 2500 bhp 3500 bhp 28 50 NPSH, At
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Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
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