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[hazmee]

what is event scheduler.
in hysys dynamic sim.


and where can i learn it.
i just read from books.. but still can't understand it.
or some tutorial with hysys examples.

Dear Hazmee:

Happy to answer your question again.
Event scheduler is a useful tool for Dynamic simulation in Hysys.
Just as it's name, it helps you to schedule your event in dynamic simulation. Dynamic simulation normally helps engineer to simulate different scenario(especially upset scenario) and test our control logic, etc.
For example, to simulate the start up of the plant, From start you need to open Valve-1, then 1hr past, you need to close Valve-1, and start compressor, open Valve-1. This can be done by hands when our integrator reaches to our expected time, but it is too tiresome, and boring. So we can use event scheduler to do this, simplify our repeated work.
The structure of event scheduler in Hysys is like this:
Schedule-->Sequence--->Event--->Action
Action is final layer to help us to do our expected work, such as specify variable, set controller mode etc. You should also specify the condition to do the action, such as elapsed time or even logic;
You can organize your own schedule as per your mind,and practice is much better than any other books to fully understand it.

Just try it.


Best regards,
P.Wang