def _get_material_bioflows_for_bev(self):
"""
Obtain bioflow ids for *interesting* materials.
These are the top bioflows in the ILCD materials
characterization method for an BEV activity.
"""
method = ('ILCD 2.0 2018 midpoint',
'resources', 'minerals and metals')
year = self.years[0]
act_str = "transport, passenger car, fleet average, battery electric, {}".format(year)
# upstream material demands are the same for all regions
# so we can use GLO here
act = Activity(
Act.get((Act.name == act_str)
& (Act.database == eidb_label(
self.model, self.scenario, year))
& (Act.location == "EUR")))
lca = bw.LCA({act: 1}, method=method)
lca.lci()
lca.lcia()
inv_bio = {value: key for key, value in lca.biosphere_dict.items()}
ca = ContributionAnalysis()
ef_contrib = ca.top_emissions(lca.characterized_inventory)
return [inv_bio[int(el[1])] for el in ef_contrib]
def report_direct_emissions(self):
"""
Report the direct (exhaust) emissions of the LDV fleet.
"""
df = self.data[self.data.Variable.isin(self.variables)]
df.set_index(["Year", "Region", "Variable"], inplace=True)
start = time.time()
result = {}
# calc score
for year in self.years:
db = bw.Database(eidb_label(self.model, self.scenario, year))
for region in self.regions:
for var in (df.loc[(year, region)]
.index.get_level_values(0)
.unique()):
for act, share in self._act_from_variable(
var, db, year, region).items():
for ex in act.biosphere():
result[(year, region, ex["name"])] = (
result.get((year, region, ex["name"]), 0)
+ ex["amount"] * share * df.loc[(year, region, var), "value"])
df_result = pd.Series(result)
print("Calculation took {} seconds.".format(time.time() - start))
return df_result * 1e9 # kg
def _sum_variables_and_add_scores(self, market, variables):
"""
Sum the variables that belong to the market
and calculate the LCA scores for all years,
regions and methods.
"""
df = self.data[self.data.Variable.isin(variables)]\
.groupby(["Region", "Year"])\
.sum()
df.reset_index(inplace=True)
df["Market"] = market
# add methods dimension & score column
methods_df = pd.DataFrame({"Method": self.methods, "Market": market})
df = df.merge(methods_df)
df.loc[:, "score"] = 0.
df.loc[:, "score_direct"] = 0.
df.set_index(["Year", "Region", "Method"], inplace=True)
# calc score
for year in self.years:
db = bw.Database(eidb_label(self.model, self.scenario, year))
# database indexes of powerplants
pps = [
pp for pp in db
if pp["unit"] == "kilowatt hour" and "market" not in pp["name"]
]
lca = bw.LCA({pps[0]: 1})
lca.lci()
pp_idxs = [lca.activity_dict[pp.key] for pp in pps]
for region in self.regions:
# find activity
act = [
a for a in db
if a["name"] == market and a["location"] == region
][0]
# create first lca object
lca = bw.LCA({act: 1}, method=self.methods[0])
# build inventories
lca.lci()
for method in self.methods:
lca.switch_method(method)
lca.lcia()
df.at[(year, region, method), "score"] = lca.score
res_vec = np.squeeze(
np.asarray(lca.characterized_inventory.sum(axis=0)))
df.at[(year, region, method),
"score_direct"] = np.sum(res_vec[pp_idxs])
df["total_score"] = df["score"] * df["value"] * 2.8e11 # EJ -> kWh
df["total_score_direct"] = df["score_direct"] * df[
"value"] * 2.8e11 # EJ -> kWh
return df
def test_electricity_tech_reporting():
rep = ElectricityLCAReporting(scenario, years)
yr = random.choice(years)
region = random.choice(remind_regions)
db = bw.Database(eidb_label(model, scenario, yr))
fltrs = InventorySet(db).powerplant_filters
tech = random.choice(list(fltrs.keys()))
test = rep.report_tech_LCA(yr)
assert len(test) > 0
assert len(test.loc[(region, tech)]) > 0
def report_endpoint(self):
"""
*DEPRECATED*
Report the surplus extraction costs for the scenario.
:return: A `pandas.Series` containing extraction costs
with index `year` and `region`.
"""
indicatorgroup = 'ReCiPe Endpoint (H,A) (obsolete)'
endpoint_methods = [
m for m in bw.methods if m[0] == indicatorgroup and m[2] == "total"
and not m[1] == "total"
]
df = self.data[self.data.Variable.isin(self.variables)]
df.set_index(["Year", "Region", "Variable"], inplace=True)
start = time.time()
result = {}
# calc score
for year in self.years:
db = bw.Database(eidb_label(self.model, self.scenario, year))
for region in self.regions:
# create large lca demand object
demand = [
self._act_from_variable(var,
db,
year,
region,
scale=df.loc[(year, region, var),
"value"])
for var in (df.loc[(
year, region)].index.get_level_values(0).unique())
]
# flatten dictionaries
demand = {k: v for item in demand for k, v in item.items()}
lca = bw.LCA(demand, method=endpoint_methods[0])
# build inventories
lca.lci()
for method in endpoint_methods:
lca.switch_method(method)
lca.lcia()
# 6% discount for monetary endpoint
factor = 1e9 * 1.06 ** (year - 2013) \
if "resources" == method[1] else 1e9
result[(year, region, method)] = lca.score * factor
df_result = pd.Series(result)
print("Calculation took {} seconds.".format(time.time() - start))
return df_result # billion pkm
def test_electricity_supplier_shares_random():
rep = ElectricityLCAReporting(scenario, years)
yr = random.choice(years)
region = random.choice(remind_regions)
db = bw.Database(eidb_label(model, scenario, yr))
shares = rep.supplier_shares(db, region)
fltrs = InventorySet(db).powerplant_filters
tech = random.choice(list(fltrs.keys()))
assert len(shares[tech]) > 0
assert math.isclose(sum(shares[tech].values()), 1)
def report_LDV_LCA(self):
"""
Report per-drivetrain impacts along the given dimension.
Both per-pkm as well as total numbers are given.
:return: a dataframe with impacts for the REMIND EDGE-T
transport sector model. Levelized impacts (per pkm) are
found in the column `score_pkm`, total impacts in `total_score`.
:rtype: pandas.DataFrame
"""
df = self.data[self.data.Variable.isin(self.variables)]
df.loc[:, "score_pkm"] = 0.
# add methods dimension & score column
methods_df = pd.DataFrame({"Method": self.methods, "score_pkm": 0.})
df = df.merge(methods_df, "outer") # on "score_pkm"
df.set_index(["Year", "Region", "Variable", "Method"], inplace=True)
start = time.time()
# calc score
for year in self.years:
# find activities which at the moment do not depend
# on regions
db = bw.Database(eidb_label(self.model, self.scenario, year))
for region in self.regions:
for var in (df.loc[(year, region)]
.index.get_level_values(0)
.unique()):
demand = self._act_from_variable(var, db, year, region)
lca = bw.LCA(demand,
method=self.methods[0])
# build inventories
lca.lci()
if "_LowD" in self.scenario:
fct = max(1 - (year - 2020)/15 * 0.15, 0.85)
else:
fct = 1.
for method in self.methods:
lca.switch_method(method)
lca.lcia()
df.loc[(year, region, var, method),
"score_pkm"] = lca.score * fct
print("Calculation took {} seconds.".format(time.time() - start))
df["total_score"] = df["value"] * df["score_pkm"] * 1e9
return df[["total_score", "score_pkm"]]
def report_materials(self):
"""
Report the material demand of the LDV fleet for all regions and years.
:return: A `pandas.Series` with index `year`, `region` and `material`.
"""
# materials
bioflows = self._get_material_bioflows_for_bev()
df = self.data[self.data.Variable.isin(self.variables)]
df.set_index(["Year", "Region", "Variable"], inplace=True)
start = time.time()
result = {}
# calc score
for year in self.years:
db = bw.Database(eidb_label(self.model, self.scenario, year))
for region in self.regions:
# create large lca demand object
demand = [
self._act_from_variable(
var, db, year, region,
scale=df.loc[(year, region, var), "value"])
for var in (df.loc[(year, region)]
.index.get_level_values(0)
.unique())]
# flatten dictionaries
demand_flat = {}
for item in demand:
for act, val in item.items():
demand_flat[act] = val + demand_flat.get(act, 0)
lca = bw.LCA(demand_flat)
# build inventories
lca.lci()
for code in bioflows:
result[(
year, region,
bw.get_activity(code)["name"].split(",")[0]
)] = (
lca.inventory.sum(axis=1)[
lca.biosphere_dict[code], 0]
)
df_result = pd.Series(result)
print("Calculation took {} seconds.".format(time.time() - start))
return df_result * 1e9 # kg
def report_midpoint_to_endpoint(self):
"""
*DEPRECATED*
Report midpoint impacts for the full fleet for each scenario.
:return: A `pandas.Series` containing impacts
with index `year`,`region` and `method`.
"""
methods = [
m for m in bw.methods
if m[0] == "ReCiPe Endpoint (H,A) (obsolete)" and m[2] != "total"
]
df = self.data[self.data.Variable.isin(self.variables)]
df.set_index(["Year", "Region", "Variable"], inplace=True)
start = time.time()
result = {}
# calc score
for year in self.years:
db = bw.Database(eidb_label(self.model, self.scenario, year))
for region in self.regions:
# create large lca demand object
demand = [
self._act_from_variable(var,
db,
year,
region,
scale=df.loc[(year, region, var),
"value"])
for var in (df.loc[(
year, region)].index.get_level_values(0).unique())
]
# flatten dictionaries
demand = {k: v for item in demand for k, v in item.items()}
lca = bw.LCA(demand, method=self.methods[0])
# build inventories
lca.lci()
for method in methods:
lca.switch_method(method)
lca.lcia()
factor = 1e9
result[(year, region, method)] = lca.score * factor
df_result = pd.Series(result)
print("Calculation took {} seconds.".format(time.time() - start))
return df_result # billion pkm
def _sum_variables_and_add_scores(self, market, variables):
"""
Sum the variables that belong to the market
and calculate the LCA scores for all years,
regions and methods.
"""
df = self.data[self.data.Variable.isin(variables)]\
.groupby(["Region", "Year"])\
.sum()
df.reset_index(inplace=True)
df["market"] = market
# add methods dimension & score column
methods_df = pd.DataFrame({"method": self.methods, "market": market})
df = df.merge(methods_df)
df.loc[:, "score"] = 0.
# calc score
for year in self.years:
db = bw.Database(eidb_label(self.model, self.scenario, year))
for region in self.regions:
# import ipdb;ipdb.set_trace()
# find activity
act = [a for a in db if a["name"] == market and
a["location"] == region][0]
# create first lca object
lca = bw.LCA({act: 1}, method=df.method[0])
# build inventories
lca.lci()
df_slice = df[(df.Year == year) &
(df.Region == region)]
def get_score(method):
lca.switch_method(method)
lca.lcia()
return lca.score
df_slice.loc[:, "score"] = df_slice.apply(
lambda row: get_score(row["method"]), axis=1)
df.update(df_slice)
df["total_score"] = df["score"] * df["value"] * 2.8e11 # EJ -> kWh
return df
def report_tech_LCA(self, year):
"""
For each REMIND technology, find a set of activities in the region.
Use ecoinvent tech share file to determine the shares of technologies
within the REMIND proxies.
"""
tecf = pd.read_csv(DATA_DIR / "powertechs.csv", index_col="tech")
tecdict = tecf.to_dict()["mif_entry"]
db = bw.Database(eidb_label(self.model, self.scenario, year))
result = self._cartesian_product({
"region": self.regions,
"tech": list(tecdict.keys()),
"method": self.methods
}).sort_index()
for region in self.regions:
# read the ecoinvent techs for the entries
shares = self.supplier_shares(db, region)
for tech, acts in shares.items():
# calc LCA
lca = bw.LCA(acts, self.methods[0])
lca.lci()
for method in self.methods:
lca.switch_method(method)
lca.lcia()
result.at[(region, tech, method), "score"] = lca.score
res_vec = np.squeeze(
np.asarray(lca.characterized_inventory.sum(axis=0)))
result.at[(region, tech, method),
"score_direct"] = np.sum(res_vec[pp_idxs])
return result
def report_LDV_LCA(self):
"""
Report per-drivetrain impacts along the given dimension.
Both per-pkm as well as total numbers are given.
:return: a dataframe with impacts for the REMIND EDGE-T
transport sector model. Levelized impacts (per pkm) are
found in the column `score_pkm`, total impacts in `total_score`.
:rtype: pandas.DataFrame
"""
df = self.data[self.data.Variable.isin(self.variables)]
df.loc[:, "score_pkm"] = 0.
df.loc[:, "score_pkm_direct"] = 0.
# add methods dimension & score column
methods_df = pd.DataFrame({"Method": self.methods, "score_pkm": 0.})
df = df.merge(methods_df, "outer") # on "score_pkm"
df.set_index(["Year", "Region", "Variable", "Method"], inplace=True)
start = time.time()
# calc score
for year in self.years:
# find activities which at the moment do not depend
# on regions
db = bw.Database(eidb_label(self.model, self.scenario, year))
fleet_acts = [
a for a in db if a["name"].startswith(
"transport, passenger car, fleet average")
]
lca = bw.LCA({fleet_acts[0]: 1})
lca.lci()
fleet_idxs = [lca.activity_dict[a.key] for a in fleet_acts]
for region in self.regions:
for var in (df.loc[(
year, region)].index.get_level_values(0).unique()):
demand = self._act_from_variable(var, db, year, region)
if not demand:
continue
lca = bw.LCA(demand, method=self.methods[0])
# build inventories
lca.lci()
## this is a workaround to correct for higher loadfactors in the LowD scenarios
if "_LowD" in self.scenario:
fct = max(1 - (year - 2020) / 15 * 0.15, 0.85)
else:
fct = 1.
for method in self.methods:
lca.switch_method(method)
lca.lcia()
df.at[(year, region, var, method),
"score_pkm"] = lca.score * fct
res_vec = np.squeeze(
np.asarray(
lca.characterized_inventory.sum(axis=0)))
df.at[(year, region, var, method), "score_pkm_direct"] = \
np.sum(res_vec[fleet_idxs]) * fct
print("Calculation took {} seconds.".format(time.time() - start))
df["total_score"] = df["value"] * df["score_pkm"] * 1e9
df["total_score_direct"] = df["value"] * df["score_pkm_direct"] * 1e9
return df[[
"total_score", "total_score_direct", "score_pkm",
"score_pkm_direct"
]]