Set SAM flip target year (IRR) even though no-op

Author: softwareengineerprogrammer

src/geophires_sam_economics/Generic_400_MWe.sam

@@ -268,6 +268,12 @@ def _get_single_owner_parameters(model: Model) -> dict[str, Any]:
 
     ret['analysis_period'] = model.surfaceplant.plant_lifetime.value
 
+    # SAM docs claim that specifying flip target year, aka "year in which you want the IRR to be achieved" influences
+    # how after-tax cumulative IRR is reported (https://samrepo.nrelcloud.org/help/mtf_irr.html). This claim seems to
+    # be erroneous, however, as setting this value appears to have no effect in either the SAM desktop app nor when
+    # calling with PySAM. But, we set it here anyway for the sake of technical compliance.
+    ret['flip_target_year'] = model.surfaceplant.plant_lifetime.value
+
     itc = econ.RITCValue.quantity()
     total_capex = econ.CCap.quantity() + itc
     ret['total_installed_cost'] = (total_capex * (1 + econ.inflrateconstruction.value)).to('USD').magnitude

src/geophires_x/EconomicsSam.py

@@ -235,7 +235,7 @@
     "months_receivables_reserve" : 0,
     "cost_other_financing" : 0,
     "flip_target_percent" : 20,
-    "flip_target_year" : 11,
+    "flip_target_year" : 20,
     "pbi_fed_for_ds" : 0,
     "pbi_sta_for_ds" : 0,
     "pbi_uti_for_ds" : 0,

src/geophires_x/sam_economics/Generic_400_MWe/Generic_400_MWe.json

@@ -187,7 +187,7 @@
 	"months_receivables_reserve" : 0,
 	"cost_other_financing" : 0,
 	"flip_target_percent" : 20,
-	"flip_target_year" : 11,
+	"flip_target_year" : 20,
 	"pbi_fed_for_ds" : 0,
 	"pbi_sta_for_ds" : 0,
 	"pbi_uti_for_ds" : 0,