How can I deal with the meeting of 2 flows can you give me some advice?
I can not lower demands since it is an existing system ...
for that reason I have low pressure, an idea to improve the system ...
see image below
It's a little bit hard to comment without seeing the whole model, but if you have low pressure problems you could:
1. Raise pressure at the water source (but this could waste energy, increase leakage and increase pipe bursts)
2. Install a booster pump station near to where the low pressure problems exist. OR
3. Increase the diameter of the most under-sized pipes. You can use the headloss result to see which pipes cause the most headloss in the system.
Regards,
Mal
Mal than:
1. The source can not be increased pressure, it is from an existing network and not from a treatment plant ....
2. it was thought to locate a booster but it does not help much and it gets worse upstream ...
3. the diameter increase is considered but it does not help much ....
Leonidas
What exactly is the hydraulic grade at the source and what is the hydraulic grade at the low pressure area?
What are the velocities between the two points?
there are 2 flow inputs in the northern part 55m of HG and in the south 27m of HG .... reaching the 8m point of HG (Hydraulic Grade) ... no high points are all between the 2 or 3 m.a.s.l.
the velocities on one side are at 0.3 and the other 0.5 as the figure shows ..
For the HG to drop fro 55 m to 8 m, it takes a very high head loss or a very long distance. I'm thinking that ther is a bottleneck in your system that is wasting a lot of energy. Use the profile tool to find that location.
Also, feeding a zone with two sources with such different HG value (55 and 27 m) can mean that water is rushing fromteh north source to the south source. check that.
si estás en lo correcto !! ... hay mucha distancia hasta este punto y mucha demanda en puntos intermedios ...
¿Qué quieres decir con "puede significar que el agua se precipita desde la fuente norte a la fuente sur"
How can I see the profile for this, is it in the juctions or the pipe?...
If this is a new design, you need to find the pipes with high velocityheadloss and upsize them to reduce head loss. If this is an existing system, then you may need to parallel the pipes with excessive head loss.
If the two sources are tanks, then water from the north tank may be flowing to the south tank instead of to customers. Check the direction of flow. If they are pumps, the south pump may be forced to a bad operating point by the north pump. Check the flow contribution form each.