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FLOW RATE REPORT - Summary This experiment sought to...

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Summary This experiment sought to investigate the effect of the rate of flow and the speed on the head, efficiency and the requirement of brake horsepower of a centrifugal pump. Three experimental trials were carried out separately. Different flow rates and speeds were used to measure data. Various relevant equations were used to calculate the values of the pump head (h p ), shaft work (BHP), net positive section head (NPSH) and the efficiency. It was clear from the experiment that at different pump speeds, the horsepower of the break decreases as the rate of flow increase. This means there was an inverse propotion between these variables. Additionally, it was also observed that an increase in the rate of flow increases efficiency upto a certain point when efficiency begins to decline. This point was at 80% rate of flow. It was even more clear that there was a gradual increase in the shaft work as the rate of flow increases. This means there was a direct correlation. However, at 1750 rpm, there was a rapid drop in the net positive suction head as the flow rate increases. In conclusion, a forward flow was not poosible when the pump was operated in the reverse direction regardless of the flow rate. Background and Methods Centrifugal Pump System Description For years, the most common type of kinetic pumps are centrifugal pumps, and are used most often in applications with moderate-to-high flow and low head. They play a key role in chemical processing industries as they are considered to be more economical both in owning operating and even maintaining them. The process engineer usually is responsible for outlining the process requirements of the pump system. These includes the physical conditions of the system, the flow
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