Lab1_Centrifugal_Pumps.docx - NAMIBIA UNIVERSITY OF SCIENCE AND TECHNOLOGY Department of Mechanical Marine Engineering Thermofluids(TFL710S Laboratory

Lab1_Centrifugal_Pumps.docx - NAMIBIA UNIVERSITY OF SCIENCE...

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NAMIBIA UNIVERSITY OF SCIENCE AND TECHNOLOGY Department of Mechanical & Marine Engineering Thermofluids (TFL710S) Laboratory Report 1. Pumps: Single, Series & Parallel. Done: 01 March 2018 Due: 12 March 2018 Prepared By: Thomas Mwatelulo 215057252 Pandeni Nekuta 216062594 Prepared For: Mr. C, January 1
Abstract This laboratory experiment was done to determine the head/flowrate characteristics for three different pump configurations. Three pump configurations were considered for this experiment. First, a single pump was connected and pumped a certain volume of water for a period of time. This was then recorded and the pressure readings were taken to investigate its head/flow rate characteristics. Two similar pumps were then connected in series then parallel and the same characteristics were investigated. This report contains the results for the 3 configurations, the discussion and conclusion of the experiment. 2
Contents Abstract ....................................................................................................................................................... 2 1. List of Symbols Used ............................................................................................................................ 4 2. Introduction ......................................................................................................................................... 4 3. Objectives ............................................................................................................................................ 5 4. Equipment and Procedure ................................................................................................................... 5 4.1.1. Description of Equipment .................................................................................................... 5 4.1.2. Set Up .................................................................................................................................. 6 4.2. Procedure .................................................................................................................................... 7 Single ................................................................................................................................................... 7 Series ................................................................................................................................................... 7 Parallel ................................................................................................................................................. 7 5. Theoretical Analysis ............................................................................................................................. 8 Single Pump Operation ............................................................................................................................ 8 Series Pumps ........................................................................................................................................... 8 Parallel Pumps ......................................................................................................................................... 8 6. Results ............................................................................................................................................... 10 6.1. Single Pump Operation .............................................................................................................. 10 6.2. Series Pump Operation .............................................................................................................. 11 6.3. Parallel Pump Operation ............................................................................................................ 12 7. Discussion .......................................................................................................................................... 13 Single ..................................................................................................................................................... 13 Series ..................................................................................................................................................... 13 Parallel ................................................................................................................................................... 13 Effect of diameter change on kinetic energy .......................................................................................... 13 8. Conclusions ........................................................................................................................................ 14 9. References ......................................................................................................................................... 15 3
1.List of Symbols UsedTable 1. List of symbols usedSymbolName UnitsV 2. IntroductionA pump is a mechanical device that converts mechanical energy into fluid energy and increases theenergy possessed by the fluid in the process. Pumps exist in two main categories, Centrifugal pumps andPositive displacement pumps. For the centrifugal pump, blades are used to increase the water pressurewhile pressure is increased by the motion of a closed volume for positive displacement pumps. Thecentrifugal pump is designed such that the fluid enters at the low pressure centre of the impeller. Thewater received at the impeller is at a low velocity on one edge but it is discharged with a higher velocityenough to raise it to the wanted height. The blades continuously push the water to the high-pressureregions of the casing and the spiraling passage transforms the kinetic energy to pressure energy. Theparts of a centrifugal pump are shown in Figure 1Figure 1. The centrifugal pump .

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