How to relate the pressure drop in a specific system to a corresponding pumping cost?

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Joseph Kopka

I believe in order to figure this out you will need to know the flow rate with a given pressure. You can probably figure this out using the reynolds number equation in which if it is a straight pipe of a known diameter, and known viscosity of the fluid you can find the flow rate. Then just figure out how much is costs to run a pump when it is creating a given amount of pressure

Emeel Kerikous

in any system, the pressure drop depends on the flow rate in the pipe system. by knowing the pressure drop and flow rate, the power can be calculated. So you can compare the consumed power in two cases as power refers to the cost.