How to constraint commodity flows among processes

[giulia realmonte]

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I would like that the electricity (ELCC) used for an industrial process comes only from renewable sources. How can I do it with user constraints or generally scenario files?

In order to say how to implement such a constraint in TIMES, I think one would first need to see the algebraic formulation of such a constraint. Can you write it down mathematically, referring to process flow or activity variables (VAR_FLO, VAR_ACT), or possibly also other model variables?

I am suggesting this just because at least for me it is not at all clear what exactly you mean mathematically when you say that the electricity (ELCC) used for an industrial process should come only from renewable sources.

I am not able to provide a mathematical formulation, because I am not sure it is possible in TIAM to track commodity flows between different processes. I can provide you a scheme of what I intend, though
   

I don't want the first flow of commodity to take place, that is the ELCC coming out from coal plants should not be an input to AZDAC001 process.
Differently I would like that the ELCC commodity input of AZDAC001 process comes from solar and wind processes.
I am not sure this is possible and I fear that the only solution is to define a new ELCC_RNW commodity for electricity produced by solar and wind...