fix recycling of implicit tax from BECCS qtty target in regipol

[orichters]

Purpose of this PR

• I forgot that in add BECCS qtty target to regipol #1336, where I adapted only postsolve and presolve. Now, apply the same code change to equations.gms
• lead to non-convergence in various integrated damage runs based on Kotz-Wenz damage function, and d_delfrag NGFS run

Type of change

• Bug fix

Checklist:

• My code follows the coding etiquette
• I performed a self-review of my own code
• I explained my changes within the PR, particularly in hard-to-understand areas
• I checked that the in-code documentation is up-to-date
• I adjusted the reporting in remind2 where it was needed
• I adjusted forbiddenColumnNames in readCheckScenarioConfig.R in case the PR leads to deprecated switches
• All automated model tests pass (FAIL 0 in the output of make test): [ FAIL 0 | WARN 0 | SKIP 6 | PASS 83 ]
• The changelog CHANGELOG.md has been updated correctly

[orichters]

Ok, that does not work at all.

      + sum((emiMkt,entySe,secInd37,entyFe)$entySeBio(entySe), pm_IndstCO2Captured(t,regi,entySe,entyFe,secInd37,emiMkt))
      ) * pm_share_CCS_CCO2(t,regi) )$(sameas(qttyTarget,"CCS") AND sameas(qttyTargetGroup,"biomass"))

does not contain variables, but just things that are updated in postsolve only. So you basically add and substract the exact same value, thus the tax has no effect at all in this case. Would probably mean turning pm_IndstCO2Captured into some sort of variable.

And somehow I just implemented the recycling, not the tax itself. Why the hell did that work at all?

[Renato-Rodrigues]

you need to remove the .l here so the model knows there is a trade-off between the tax and the level of vm_emiTeDetail here.

[Renato-Rodrigues]

In order to consider the industry BECCS tradeoff, you should replace the parameters calculated in the postsolve by the variables used to calculate them.
However this will be most probably a quite non-linear equation, and I am not sure how big is the importance of the industry BECCS in the target you want to achieve.