## Flow rates division need help

## Flow rates division need help

(OP)

On the left we have a system with a pump and two branches , a pump produces head of 10 bars and Q of 5 m3/h according to the system requirments. On the left the pressure came uot of the pump 10 bars it drops to reach 9 bars at point 3 then the 9 bars drops in branch 1 to reach 1 bar at its end and the 9 bars drops in branch 2 to reach 8 bars at the end , while the flow rate is divided to be Q=2 in branch 1 and Q=3 in branch 2 according to pipe sizing and calculations . Now on the right picture the same system but we adds a resistance ( restricted orfice ) to drop the pressure 2 bars on branch 2 ,, now the pump curve point is the same and the pressure is the same at branch 1 but it drops to 6 bars at the end of branch 2 ... Now the question is the pump still produces the Q=5 as the point of operation doesn't change but at the same time there is much resistance in branch 2 than the previous case , so what will be the valve the flow rate decreases in branch 2 and increases in branch 2 ??

I need to understand this point

## RE: Flow rates division need help

Assuming it's 8 bar the flows should be the same because you have been able to lower the end point by the same amount as your artificial pressure resistance (2 bar). Normally that doesn't happen..

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## RE: Flow rates division need help

## RE: Flow rates division need help

Remember - More details = better answers

Also: If you get a response it's polite to respond to it.

## RE: Flow rates division need help

## RE: Flow rates division need help

Is there a practical application to this or is it some sort of course work?

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## RE: Flow rates division need help

## RE: Flow rates division need help

Remember - More details = better answers

Also: If you get a response it's polite to respond to it.

## RE: Flow rates division need help

## RE: Flow rates division need help

If the angle of the hydraulic line stays the same for the same size pipe then you have the same flow rate.

Remember - More details = better answers

Also: If you get a response it's polite to respond to it.