Creating a new input fractionation model

Hi all,

I'm trying to create a new input fractionation model for a new ASM type model.

One of the issues I'm having is that I want to define a parameter for a constant inflow of let's say X_I (i.e. X_I_In). In previous versions (before WEST 2014 I guess), I would have put a parameter block on the fractionation layout and link the parameter X_I_In to it.

In the current version (WEST 2014 sp3) I only find a block '1'. I can give it a label but do not find a way to link a parameter to it.

Any suggestions?

Basically, in [b]W2012[/b], one would:
[list]
[li]drop a "parameter" block on the canvas (your "X_I_In") and connect it to the relevant state component ("X_I")[/li]
[li]assign a weight "1" to the conversion[/li]
[/list]
In [b]W2014[/b], one is to:
[list]
[li]drop a "1" block on the canvas and connect it to a (set of) state component(s) (including, in your case, "X_I")[/li]
[li]define a parameter "X_I_In"[/li]
[li]assign a weight "parameters.X_I_In" to the conversion[/li]
[/list]

Any particular reason for this change?

As it seems to me that putting the parameters on the layout (as in WEST2012) gives a clearer overview of the model.

How does it work for using WEST 2012 fractionation models in WEST 2014?

[quote]Any particular reason for this change?[/quote]
It's more rigorous from a code viewpoint.
In W2012, using a parameter block on the layout or defining a new parameter in the expression for the weight of a transformation, would both result is a parameter OBJ in the MSL code of the (de)Fractionation model.
In W2014, a parameter can only be defined in one way, i.e. at the level of the expression for the weight of a transformation.

[quote]How does it work for using WEST 2012 fractionation models in WEST 2014?[/quote]
Until you don't regenerate (code and influent files) it should work just fine - as what matters is the MSL code and there, how a parameter OBJ was created, is of no relevance.
If you need to regenerate, it may be necessary to first update the W2012 layouts to the new "concept".

[quote]It's more rigorous from a code viewpoint.[/quote]

That is a pity I liked the clear overview in the fractionation layout. Now, I will need to overcome my natural resistance to change  :) .

[quote]If you need to regenerate, it may be necessary to first update the W2012 layouts to the new "concept".[/quote]

So, if I have a working model with a WEST 2012 fractionation layout and I want to change the input file (which needs a regenerate), I will need to update my fractionation model. Right?

I am afraid so, yes.