External coupling co2 emissions

[jort-wolda]

Context

Implemented changes

External coupling co2 emissions:

• Steel
• Fertilizers transformations
• Refineries transformations
• Chemicals other transformations

Related

Goes with pull requests:

• Keys for external coupling emissions sliders etmodel#4804

Checklist

• I have tested these changes
• I have updated documentation as needed
• I have tagged the relevant people for review

[kndehaan]

General discussion points:

• Unit of new inputs is in kton, all other absolute emission-related external coupling inputs (except new ones for static emissions) are in Mton. Should we apply Mton as well?
• Emission sliders added to the respective sector sections in the model, not to Greenhouse gas emissions section
• Emissions from the external coupling nodes are reported under Industry sector, whereas the node name indicated energy sector
• industry_steel_external_coupling_node_co2 already existed, but it now works differently where CO2 is set via external coupling input. I therefore think we need a migration to preserve the "demand" on the node for existing scenarios.

[kndehaan]

Could you move the four input files to the folders of the sub sector they belong to? From a quick glance, it seems that the sub folders also represent the sub sector that is in coupling_groups. So then it seems more logic that the emissions input files are also put into the folder that represents their coupling group.

[kndehaan]

From the general discussion points, I'll discuss the kton or Mton decision with the client. The scenario migration will be picked up. The other two points don't need any action.