Hi,
i have a network with 3 bore hole pumps that connect to a main manifold and from that manifold one pipe fill a tank.
can epanet simulate such a network?
thanks,
Ari.
Can EPANET calculate a network with multiple pumps?
Its possible, I try to model a system having 12 boreholes and successfully run ,
Just assign neg demand at each node which represents a boreholes. Then run
how to model booster pump?
If you want to model the borehole pump,
you can model each borehole as a sequence of reservoir and pump
The reservoir head will represent the water level in the aquifer
The pump is characterized by a pump curve
thanks gal.
Iâ€™m actually know how to model a single borehole pump (Iâ€™m doing it exactly as you wrote).
the question is can epanet simulate multiple pumps (pumpâ€™s curve, it doesnâ€™t necessarily need to be a bore hole pumps) that feed one manifold.
Iâ€™ve attached a simple drawing to show what i mean.
thanks,
Ari.
no.
those pumps are individual and connect parallelly, not in a row.
those pumps connect to a collecting manifold, and from that one a single pipe fill a reservoir.
@aridzv Have a look at this network here with three pumps in parallel:
https://emps.exeter.ac.uk/engineering/research/cws/resources/benchmarks/expansion/dtown.php
The INP file is here:
https://emps.exeter.ac.uk/media/universityofexeter/emps/research/cws/downloads/dtown.inp
thanks elad.
i have 2 more quotations, if I may:
 i didnâ€™t see any P.S.Vâ€™s after the pumps. how do this model set/fix the pumpâ€™s flow?
 can i use Cramerâ€™s rule to develop the headflow equation from a given pump graph?
thanks,
Ari.
@aridzv, regarding your questions:
 The pump flow is determined by the intersection of the pump curve and the system (resistance) curve. If you aim to set a constant flow you might consider using a variable speed pump.
 I am not familiar with Cramerâ€™s rule in the context of pump curves. EPANET allows you to insert the curve as a set of discrete points and then it will build the continuous graph on its own
Gal

my question was referring, in my case, to a pump station design, or as it calls in the irrigation world  system head or head control.
when I do the design I will use a reservoir at a set level and then I will get the head loss.
the flow (Or demand in EPANET languageâ€¦) is usually known. the required pressure, or head, in the outlet of the pumping station is also known, so in this way and with a proper use of PSV and FCV I get head loss between the pump and the end of the pumping station, add it to the required pressure at the end of the pumping station and in that way I get the pump working point, and then I can select a pump.
the use of a PSV AFTER the pump is selected is to set the pumpâ€™s flow, and it is the way it is done in the real life, not only as a design method.
and this leadâ€™s us to next issue: 
EPANET simple way of creating a pump curve is to enter points of head and flow. this is basic.
I wonder if EPANET allows you to enter a pump equation instead. 
Cramerâ€™s rule allow you to use a set of known values to produce an equation.
for example, 3 point will get you a Y=ax^2 + bx + c.
my question\dilemma is, if this equation is accurate enough?
I saw in some publication and softwareâ€™s that use it to get a pump curve equation, but most pumps
equations provided by the manufactures are not straight forward exponential equations.
i think it is better to add only one(1) valve to the collecting manifold, economically and for maintenance point of view.
thanks