Hi there Many of our in-house types as well as the few TESS types that I’ve looked at solve their ODEs internally, using a wide variety of methods from numerical to evaluating the explicit solution directly. I’m very unclear about the (dis-)advantages of doing that vs. using the TRNSYS built-in functionality of DERIVATIVES/setNumericalDerivative/getNumericalSolution. Is DERIVATIVES & friends just
My question is “informed” by Wikipedia’s page on DAEs:
https://en.wikipedia.org/wiki/Differential-algebraic_system_of_equations. After skimming through it, I was wondering what it means if (for the purpose of this discussion) the ODEs of all units within a simulation are hidden in the blackbox of their corresponding unit, then the system to TRNSYS’
eyes is completely “algebraic”… Are we developing are in-house types in a “wrong” way? Cheers, Damian |