Water Treatment Engineering
Water Treatment Engineering CE 431
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This 3 page Class Notes was uploaded by Charles Wisoky on Saturday October 3, 2015. The Class Notes belongs to CE 431 at California State Polytechnic University taught by Abdul Rashidi in Fall. Since its upload, it has received 29 views. For similar materials see /class/218238/ce-431-california-state-polytechnic-university in Civil Engineering at California State Polytechnic University.
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Date Created: 10/03/15
Water Supply Engineering Homework No10 Solution Pump Design 1Given 6quot201039 2221523 8quot56339 Pump information including the following pump curve data is available from the manufacturer of the pump Find APlot the pump curve BWhat is the static head CWhat is the equation for the system curve DWhat is the discharge Q BWhat is the operating head Solution APump Curve see graph at end of problem Bstatic head E1EpumpEturbineEfriction E2 Eturbine 0 Epump EzE1Efriction Select points 1 and 2 at the free water surface top of either resevoir therefore 1317 132 7 0V122 g szZg negligible Epump ZzZ1Efriction AZEfriction Epump static head dynamic head static head AZ 528 CSystem curve equation Assume C 130 each pipe 431 HW O SolRashidi 12 Water Supply Engineering 4 727L 185 4 727L8 185 EpumpAZ39 6 Q j 39 Q D287 CS 1287 c8 185 185 Epump528 47272010 amp 4727546837 amp 61287 130 812 130 Epump 5283435Q185235Q185 Epump 528367Q185system curve equation D and EDischarge Q and operating head A centrifugal pump will only operate along its own pump curve The intersection of the system curve and the pump curve de nes the operating point of the pump Q and H at that point Calculate the system curve by assuming values of Q around the desired Q and inserting the assumed values into the system curve equation to obtain Epump which is H Plot Q vs H EpumpQ 0 528367Q185 5283670185 EpumpQ 0 528 EpumpQ 100 528367Q185 528367223185 EpumpQ 100 610 EpumpQ 300 528367Q185 528367668185 EpumpQ 300 77339 EpumpQ 500 528367Q185 52s3671114185 EpumpQ 500 93739 OPERATING POINT FOR PUMP operating pom H head feet 100 Pump Curve 1 system Curve 00 0100 0300 0500 DischargeQ gpm From graph Q 370gpm H 8039 431 HW10 SolRashidi 22