Fan model for system optimization

[nh3simman]

Hi Autt

Have you heard of the Broyden method?

It is an iterative method of solving multi-dimensional non-linear systems.

As with the Newton-Raphson method, convergence is quadratic but the advantage is that you do not have to recalculate the slope matrix. You start with a calculation of the inverse slope matrix and only have to update the slope at each step.

I have tried this with 1000 branch airflow networks that includes active components like fans and leakage branches.

With object oriented design, the network can be written as an abstract solver. This means that you can plug in components like ducts, fans, etc...

[autt]

I have tried this with 1000 branch airflow networks that includes active components like fans and leakage branches.

1000 is a very large number, I just tried a 9 branches with flow and pressure balance from my DuctNet package, it takes 4 seconds in my computer at the best state, some iterations calculated in components.