Pump Lab Analysis

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Pump (P-02) Analysis P101 is located between the electrostatic coalesce and the floating storage unit. Pump P-02 is required to pump a flow(S10) which consists of heavy crude oil into the floating storage unit. There will be pressure losses from pipe length and pipe fittings such as check valves. Centrifugal pumps are used as they are relatively inexpensive and they have few moving parts, therefore tend to have greater onstream availability. Assumptions There are some assumptions that were involved in the calculations that I have made. The process was assumed to be an isothermal process and there will be no heat losses throughout the equipment. Gravitational acceleration was 9.81 m/s Floating storage unit is at the minimum capacity.…show more content…
Pressure loss due to friction along the pipe Pressure loss will occur when a liquid flows through a pipe. This pressure loss is known as friction loss. It is due to the viscous effects done by surface of the pipe, it is like the surface of the pipe is dragging the liquid from flowing. To calculate the friction loss, we can use the Darcy-Weisbach equation, but first we need to determine the friction factor. We know that the flow in the pipe is turbulent since the Reynolds number exceeds 3000, now we have to find the friction factor using the Colebrook-White equation: 1/f^(1/2) = -2LOG[ ϵ/3.72d+ 2.51/(Re × f^(1/2) )] Where; f=Moody friction factor d=Cross sectional area of pipe Re=Reynolds Number ϵ=Absolute Roughness of pipe The friction factor calculated was 0.01543 and was checked with the moody diagram to ensure correct values were…show more content…
Then, we need to find out about the desired flow rate. With this, the Net Positive Suction Head (NPSH) available can be determined. For the pump to work efficiently, we have to choose a pump that its NPSH required is lower than our NPSH available. We have to match the pump to the piping system and required flow rate in order to acquire a pumping system that meets the pump criteria. Pump manufacturers should be able to supply a pump curve which demonstrates the performance of the pump and the maximum allowable operating ranges. The pump that I have selected is a centrifugal pump from Afton Pumps Incorporation. This pump runs at a speed of 1750rpm and its required NPSH is at 4.2m which is lower that the NPSH available. The minimum flow rate for this pump is 24.6m³/hr and input power is at 1.54kW. This pump suits for the data that I have calculated, therefore the pump was chosen. Safety Precautions Since we are handling with highly flammable liquids, proper maintenance must be done regularly so that the pump would be in perfect condition. Leakage of the liquid will lead to possible explosion or flames if it is exposed to high temperatures, electric sparks or any other hazards which will cause serious personal injuries, death or property damage. Safeguards or any safety system should be implemented to detect any leaks from the pumps, elevated temperatures or spark

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