Professionally I work at BPT and focus on creating value adding App for Process Simulation. You can find more info on those on the BPT website. Below are posts that should help HYSYS, PetroSIM and UNISIM users alike in their day to day challenges to produce accurate yet fast models efficiently.

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Saturday, 21 February 2015

Did You Know Series: Manipulating flows in dynamics

It is common practice when building a dynamic model to only model a single train if two or more identical parallel trains exist in a facility.  The one hurdle to take is to change the flow to a fraction or multiple of the flow at a number of points in the simulation. To my surprise I recently received a HYSYS case that was using an extension called "multipop" that I created 15 years ago for this purpose. You can still get it on the Aspentech support site.

So here is the "Did you know?": There has been a built-in way to do this in HYSYS and most probably UNISIM for quite while. You can use a Mixer operation, just give it one inlet and one outlet, then go to the Dynamics tab and you'll find a "Product Molar Flow Factor" that works just like the extension operation. I am all for extensions, but not if the capability is built-in.

Screenshot in HYSYS V8.3

Note that this multiplier option only works in dynamics!

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