Schema modifications for CO2e

[kflemin]

Adding CO2e fields.

1. Added to AllResourceTotal:
   1. AnnualAverageCarbonEmissions
   2. AnnualMarginalCarbonEmissions
2. Added to ResourceUse -> Emissions -> Emission:
   1. EmissionsLinkedTimeSeriesIDs -> EmissionsLinkedTimeSeriesID
3. Added to TimeSeries -> TimeSeriesReadingQuantity
   1. Enum "Emissions"
4. SCENARIO TYPES changes:
   1. Added to ScenarioType -> CurrentBuilding:
      1. Nothing
   2. Added to ScenarioType -> Benchmark:
      1. Nothing
   3. Added to ScenarioType -> Target:
      1. AnnualSavingsAverageCarbonEmissions
      2. AnnualSavingsMarginalCarbonEmissions
   4. Added to ScenarioType -> PackageOfMeasures:
      1. AnnualSavingsAverageCarbonEmissions
      2. AnnualSavingsMarginalCarbonEmissions
      3. Added to ScenarioType -> Other:
         1. AnnualSavingsAverageCarbonEmissions
         2. AnnualSavingsMarginalCarbonEmissions
   5. Added ScenarioType -> DerivedModel :
      1. Nothing

Resolves BuildingSync/project-tracker#94

[kflemin]

Is this the appropriate value for this enum?

[nllong]

I think so, or maybe Greenhouse Gas Emissions

[laurenliz22]

Maybe GHG Emissions to be consistent if we change the above

[nllong]

This is great @kflemin, thanks! Can you add a proposal in this folder too? You PR text already has a bunch of the required data. Thanks!

https://github.com/BuildingSync/schema/tree/develop-v2/proposals/2022

[kflemin]

@nllong, done!

[nllong]

looking sweet. Couple comments!

[nllong]

This is really a GHG metric since it is CO2e which is each greenhouse gases multipled by global warming potential. So Nitrus Oxide has no carbon, per se, but has a GWP of ~300, so it is more "potent" than 1 kg CO2. Don't make changes yet on the term AnnualAverageCarbonEmissions, let's see what others think.

[laurenliz22]

Maybe we just name it AnnualAverageGHGEmissions to cover all scenarios? However, if we do this then should we change all (e.g. AnnualSavingsAverageCarbonEmissions to AnnualSavingsAverageGHGEmissions?)

[kflemin]

that's how it is here: https://github.com/BuildingSync/schema/blob/ghg-example/BuildingSync.xsd#L3108. We could keep that pattern... Let me know if you want that change or if you want to wait.

[laurenliz22]

@kflemin let's change it from carbon to GHG throughout. It's more accurate so it makes sense to just include all GHG emissions in addition to carbon, even if they are small.

[kflemin]

@laurenliz22, done!

[nllong]

I think so, or maybe Greenhouse Gas Emissions

[nllong]

update with the real number in the time series

[kflemin]

done

[kflemin]

I also made the Greenhouse Gas Emissions change above as well.

[nllong]

Suggested change

	<AnnualAverageCarbonEmissions>kgCO2e - 10000 </AnnualAverageCarbonEmissions>
	<AnnualAverageCarbonEmissions>10000</AnnualAverageCarbonEmissions>

[kflemin]

i fixed this in another commit

[nllong]

🎉

[nllong]

use total from time series

[kflemin]

done

[laurenliz22]

Added a couple notes, but looked great to me after reviewing!

[laurenliz22]

Maybe GHG Emissions to be consistent if we change the above

[markborkum]

Should the auc:EmissionBoundary element have EPA-style "Scope 1", "Scope 2" and "Scope 3" enumerations instead of "Direct" and "Indirect"? ("Scope 1" would map to "Direct". "Scope 2" and "Scope 3" would both map to "Indirect".)

When describing the auc:EmissionsFactor for emissions related to electricity, should there be a way to assert whether grid gross loss (a.k.a "line loss") is included in the calculation?

[markborkum]

The new "GHG" elements should be declared before the auc:UserDefinedFields element.

[kflemin]

@markborkum, good catch! I just switched the order.

[laurenliz22]

@markborkum the auc:EmissionBoundary element and the auc:EmissionsFactor for emissions related to electricity were not altered for the GHG Metric updates made to the schema. If we change these then we will cause a breaking change. We are going to add it to our list for future changes regarding GHG Emissions we may need to make that will cause breaking changes. Let me know if you have any questions/concerns. Thanks