Murari Iyengar
Ansys Employee


 ECM model is a linear model, so it calculates parameters at a single operating point and then interpolates/extrapolates for other operating points. Considering your HPPC test is done correctly, Fluent should be able to identify parameters accurately. Once this is done, Fluent is quite robust and accurate in providing results at various operating points and boundary conditions. We have done numerous tests to confirm this so, I can assure you of Fluent's reliability is this domain. 

You don't require the state-space model for this application, although it can be an alternative. As mentioned above, using HPPC data and Fluent's parameter estimation tool, Fluent can accurately calculate at various operating points.