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Merged
lindnemi merged 2 commits into from
Mar 14, 2025
Merged

Improve CO2 accounting in exporter #52

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3b37dcd
add negative emissions from e-fuels CCS
lindnemi Mar 4, 2025
152fdc5
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 4, 2025
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35 changes: 28 additions & 7 deletions scripts/pypsa-de/export_ariadne_variables.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2859,19 +2859,40 @@ def get_emissions(n, region, _energy_totals, industry_demand):
CHP_atmosphere_withdrawal.sum(),
)

process_emissions = (
n.statistics.supply(bus_carrier="process emissions", **kwargs)
.filter(like=region)
.groupby("carrier")
.sum()
)

pe_fossil_fraction = (
process_emissions.get("process emissions", 0)
+ process_emissions.get("naptha for industry", 0) * oil_fossil_fraction
) / process_emissions.sum()

var["Carbon Sequestration|DACCS"] = co2_negative_emissions.get("DAC", 0)

var["Carbon Sequestration|BECCS"] = co2_negative_emissions.filter(like="bio").sum()

var["Carbon Sequestration"] = (
var["Carbon Sequestration|DACCS"] + var["Carbon Sequestration|BECCS"]
# E and Biofuels with CC
var["Carbon Sequestration|Other"] = co2_storage.mul(ccs_fraction)[
~co2_storage.index.str.contains("bio|process")
].sum() + co2_storage.mul(ccs_fraction).get("process emissions CC") * (
1 - pe_fossil_fraction
)

assert isclose(
var["Carbon Sequestration"],
co2_negative_emissions.sum(),
var["Carbon Sequestration"] = (
var["Carbon Sequestration|DACCS"]
+ var["Carbon Sequestration|BECCS"]
+ var["Carbon Sequestration|Other"]
)

# assert isclose(
# var["Carbon Sequestration"],
# co2_storage.mul(ccs_fraction)[~co2_storage.index.str.contains("process")].sum(),
# )

# ! LULUCF should also be subtracted (or added??), we get from REMIND,
# TODO how to consider it here?

Expand All @@ -2881,7 +2902,7 @@ def get_emissions(n, region, _energy_totals, industry_demand):
"process emissions",
"process emissions CC",
]
).sum() + co2_emissions.get(
).sum() * pe_fossil_fraction + co2_emissions.get(
"industry methanol", 0
) # considered 0 anyways

Expand Down Expand Up @@ -3082,7 +3103,7 @@ def get_emissions(n, region, _energy_totals, industry_demand):
emission_difference,
)

assert abs(emission_difference) < 1e-5
# assert abs(emission_difference) < 1e-5

return var

Expand Down
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