Thank you for the responses.
And to the person on this thread that is complaining about elementary questions:
I take my responsibilities as an engineer very seriously. I know and understand my obligations both ethically and to my clients. I do not deny that the problem that I have presented...
I agree, it does look like homework. I made up the problem b/c I'm just trying to understand the basics.
In order to "plot the system head curves for each pump running separately through only those pipes which carry flow", I assume that this is single/simplex operation of each pump. How do I...
For pumps in parallel operation, do I calculate the combined flow at the point of force main connection?
For example: Assume Pump "A" has 75 gpm, Pump "B" has 50 gpm. Based on the attachment, does Pump "B" see the friction head loss of 50 gpm @ 100 ft. of fm length + 125 gpm (50+75) @ 500 ft...
Thanks for the help. It seems we are heading in the correct direction by using the energy equation to solve for the pressure (& converted to head) to the 4" force main connection. So we then just need a pump that will pump greater than this amount of head to open the check valve. [To...
The check valves will act, or check, to keep wastewater from entering the opposing force main. There is a check valve located near the pump station discharging w/ the 14" force main, but it's several miles downstream. I don't think I should assume the force main is completely full up to the 4"...
We are proposing to connect a 4" force main to an existing 14" force main. Based on old design plans, the 14" force main is operating at 1,600 GPM @ 216' TDH (two submersible 130 HP pumps). Our proposed lift station will operate at 100 GPM @ 50' TDH. We are proposing to add two check valves...
