hydraulics: parallel circuit

[mir]

Hi.
Quick question: I have a circuit as in the enclosed jpeg.

objects 1, 2 and 3 are three identical localized losses so the only thing is that the circuit with 3 is longer.

for the calculation of the necessary prevalence I must:
1. calculate the losses of the most critical circuit and with those dimensional the pump
2. make an equivalent system (for electricity) and from there dimensional the pump

which of the two is the correct solution?

Thank you.
♪

 

[Cristallo]

In my opinion you have to calculate the load losses to the pump heads, and then the sum of all three localized losses and the sum of the load losses per length/characteristic of all three circuits.
This is because (presumption) you will have a "doctor of contemporaneity" equal to 1, that is probably all the circuits will be active at the same time.
if you have certainty that only 1 of the 3 circuits will be active at a certain time, then you will consider the most unfavored (number 3)
but take what I say with the springs. It's not my field.

 

[PierArg]

In my opinion you have to calculate the load losses to the pump heads, and then the sum of all three localized losses and the sum of the load losses per length/characteristic of all three circuits.
This is because (presumption) you will have a "doctor of contemporaneity" equal to 1, that is probably all the circuits will be active at the same time.
if you have certainty that only 1 of the 3 circuits will be active at a certain time, then you will consider the most unfavored (number 3)
but take what I say with the springs. It's not my field.

crystal quot.

I add that you have to pay attention to the range: it will not be divided into three equal parts but will tend to go towards a preferential route, that is that which has less load losses than the others.

 

[mir]

ok ragaszi ... razie