Case Analysis Of Pump Essay

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.

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