Open willu47 opened 4 months ago
I think the suggested solution might lead to distorted results in relation to negative emissions, i.e., models will underestimate their role. This problem is for me a reason why I prefer to work with emission limits since their positive and negative emissions balance out, as they would in an emission trading system. Where negative emissions will start playing a role once the price for certificates is high enough for negative emission techs to break even. But I see the need to be able to work with an emission penalty since it is required in many projects and model comparisons. However, as said above this formulation might lead to results that underestimate the role of negative-emission-techs.
I agree with @HauHe and have some additional thoughts on this matter:
So much about my ideas, curious about what you think about them.
@Timon-R has identified that use of EmissionPenalty subsidises negative emissions, resulting in energy system models "farming" negative emissions to reduce the total energy system costs.
@FraGard suggests the following solution modifying the E5 constraint to only be active for positive values of
EmissionAcitivityRatio
, e.g. adding: EmissionActivityRatio > 0
Change:
To: