by jasper » 18 June 2014, 06:53
First, can you let me know how to reproduce a crash?
Second, I am not sure what you mean with Unit operation [Ports]. Can you send me an example?
Regarding a controller: it is not a classic unit operation in the sense that it takes and input and predicts an output. It adds different types of equations to the overall system, and as a result
- the system is no longer suitable for direct substitution, and only Newton like solvers can be used
- the stream that comes out of a controller must be a cut stream, hence it needs to be contained inside a recycle
I am not sure how you cut your flowsheet up: again, can you send me an example?