piping calculations
piping calculations
(OP)
how to calculate the right pump(s) when you have two pumps
pumping into a ring and there are branches off of that ring and the branches all discharge to the same place overboard
pumping into a ring and there are branches off of that ring and the branches all discharge to the same place overboard





RE: piping calculations
Mike Halloran
Pembroke Pines, FL, USA
RE: piping calculations
This can be done e.g. in excel or using a dedicated modelling tool.
Best regards
Morten
RE: piping calculations
The Kirchoff equation solution is iterative in that the equations for hydraulics are nonlinear.
You could use a Hardy Cross (HC) method, as that includes the iterative proceedure for the flows in the ring. The flows in the branches are determinate when the branch inlet heads (at the ring) and outlet heads (overboard points) are known. The pump heads must be examined at each HC iteration and, if the flowrate in/out of the node where the pump branch enters the ring changes significantly during an iteration, the new head must be applied to the ring at the pump's discharge point.
However, I'd do as Morton suggests and use a network modeling program. Perhaps EPAnet might be useful in this case.
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: piping calculations