EPANET 2 questions
EPANET 2 questions
(OP)
Hello to everyone,
If i connect pipe to the tank... where is really that connection point? Is that top of the tank, bottom...?
That is critical point if I want to simulate inflow or outflow from the tank!
Thanks,
Marko Ristanovic, Civil Engineer
If i connect pipe to the tank... where is really that connection point? Is that top of the tank, bottom...?
That is critical point if I want to simulate inflow or outflow from the tank!
Thanks,
Marko Ristanovic, Civil Engineer





RE: EPANET 2 questions
Almost certainly the inlet/outlet will be at the bottom of the tank. It makes little to no sense to draw water from only the top of a tank.
good luck
RE: EPANET 2 questions
It is so complicated system... when pumps are working, they are pumping water through 2 main pipe lines. One is going directly to the tank and second is going directly to the network. Tank is filling from both sides, from inlet pipe and outlet pipe because pressures are high from both sides. When pumps are off, water goes back to the network from both sides (inlet and outlet) until water level in the tank is below inlet pipe (1m below top of the tank) and after that water goes only through outlet pipe. In reality it is like that and I need to simulate that scenario. So I would like to know this figures about level (position) of connection point on the tank in the model. How is EPANET doing that? Is pipe connected like you said at the bottom of the tank and if it is like that, can I "cheat" somehow?
Thanks RWF7437
RE: EPANET 2 questions
RE: EPANET 2 questions
Thank you!
RE: EPANET 2 questions
connect both pipes to the tank.
ignore the bottom 1 meter, so the model tank is 1 m above the real tank, this simulates the effuent pipe at 1 m above the bottom of the tank
On the infuent pipe, use a statement in 'controls' to turn the pipe to closed when the tank is below the level of 1 meter of the tank top, this prevents the pipe from being used when it cannot.
Hydrae
RE: EPANET 2 questions
Also this with 'controls' is sometimes problematic and it is really question if it will respond on each 'rule'...
RE: EPANET 2 questions
Hydrae
RE: EPANET 2 questions
In Epanet you have Base demand, Demand multiplier and Demand Pattern. What is what? Can I treat Base demand as Daily average consumption (Qd,av), Base Demand x Demand Multiplier as Daily maximum (Qd,max) and Base Demand x Demand Pattern as hourly maximum (Qh,max)?
=Right or wrong?
RE: EPANET 2 questions
Patterns are intended to be used for time based changes such as hourly or even minute by minute
Demand multipliers are intended to be used for growth calculations
But how you used them is up to you
I also use patterns to also calculate a fire flow
such as a 2 hour fire of xxx gpm at node x at 7 am
Hydrae