How to constraint commodity flows among processes

[Antti-L]

Below you can see a constraint block requiring that the ELCC output from wind and solar power plants is greater than or equal to the total ELCC input to AZDAC* processes in each period (from 2030) and timeslice. There is a small problem with the transmission losses, which are not automatically taken into account, and so I have used 0.95 as a crude approximate loss coefficient.