Split of HFCs leaves uncharacterized "Others"
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flowsa/flowsa/data_source_scripts/EPA_GHGI.py
Line 782 in 4cf2593
This fxn works to speciate the "HFCs and PFCs" in T_4_102 based on the breakdown in T_4_100, but this leaves the "Others" flows
These "Others" flows do not get characterized later. The CO2e of these Others is not-negligible - it is 9% of these ODS Substitutes CO2e in 2016 and 10% in 2017
That's correct, and consistent with the NGHGIAM in excel. I think that is the main source of "lost" HFCs (along with the skipped Aerosols, Fire Protection, and Solvents)
I agree that it was lost before, but i think we should add it in as its included in the GHGI. An option is to assigned it a proxy species
Here is some language from the GHGI 2022 4-137
Others represent an unspecified mix of HFCs and PFCs, which includes HFC-152a, HFC-227ea, HFC-245fa, HFC-365mfc, HFC-43-10mee, HCFO-1233zd(E), HFO-1234yf, HFO-1234ze(E), HFO-1336mzz(Z), C4F10, and PFC/PFPEs, the latter being a proxy for a diverse collection of PFCs and perfluoropolyethers (PFPEs) employed for solvent applications. For estimating purposes, the GWP value used for PFC/PFPEs was based upon C6F14.
I don't think it implies that all the Others use the C6F14 CF, but C6F14 could potentially be used as a proxy.
Would there be another option of including the CO2e from these Others like perhaps using a CO2e flowable?
Two immediate options that come to mind are to either:
- map "Others" to something in the FEDEFL (we don't really have a great non-specific flow)
- or to
keep_unmapped_flows: True
to just leave it in the final FBS. Note the context and units would be different if there is no mapping:
Flowable | Class | SectorProducedBy | SectorConsumedBy | SectorSourceName | Context | Location | LocationSystem | FlowAmount | Unit | FlowType | Year |
---|---|---|---|---|---|---|---|---|---|---|---|
HFC-125 | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 1722.324 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-134a | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 6210.874 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-143a | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 810.8729 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-236fa | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 17.03279 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-32 | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 875.92 | kg | ELEMENTARY_FLOW | 2016 | |
Others | Chemicals | 211111 | NAICS_2012_Code | air | 0 | FIPS | 0.001915 | MMT CO2e | ELEMENTARY_FLOW | 2016 |
Ah yes saw your edit - we could do a generic CO2e flowable and add that to the flow list (per bullet 1 above)
HFCs and PFCs, unspecified
perhaps with a MTCO2e unit?
Yes I like that idea if you are ok with that flow.
The units is going to be a challenge - mass units with CO2e is not a valid unit.
Could we call the flow HFCs and PFCs, unspecified (CO2e)
and use units of kg?
I'm working on hfcs branch of fedelemflowlist
Will look something like this, pending final name:
Flowable | Class | SectorProducedBy | SectorConsumedBy | SectorSourceName | Context | Location | LocationSystem | FlowAmount | Unit | FlowType | Year |
---|---|---|---|---|---|---|---|---|---|---|---|
HFC-125 | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 1,722 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-134a | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 6,211 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-143a | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 811 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-236fa | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 17 | kg | ELEMENTARY_FLOW | 2016 | |
HFC-32 | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 876 | kg | ELEMENTARY_FLOW | 2016 | |
HFCs and PFCs, unspecified | Chemicals | 211111 | NAICS_2012_Code | emission/air | 0 | FIPS | 1,915 | kg | ELEMENTARY_FLOW | 2016 |