Port wellfield & surface plant O&M cost tooltips from theoretical basis

Author: softwareengineerprogrammer

src/geophires_x/Economics.py

@@ -1879,14 +1879,21 @@ def __init__(self, model: Model):
             ToolTipText='Drilling and completion cost per well, including indirect costs '
                         f'(default: {self.wellfield_indirect_capital_cost_percentage.DefaultValue}%).'
         )
+
+        # noinspection SpellCheckingInspection
         self.Coamwell = self.OutputParameterDict[self.Coamwell.Name] = OutputParameter(
             Name="O&M Wellfield cost",
             display_name='Wellfield maintenance costs',
             UnitType=Units.CURRENCYFREQUENCY,
             PreferredUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR,
-            CurrentUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR
-            # TODO TooltipText to document how this is calculated
+            CurrentUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR,
+            ToolTipText='The built-in correlation for the wellfield O&M costs is similar as the surface plant O&M '
+                        'costs: it assumes that it consists of 1% of the total wellfield plus field gathering system '
+                        'costs (for annual non-labor costs) and 25% of the labor costs (the other 75% of the labor '
+                        'costs are assigned to the surface plant O&M costs).'
+            # TODO parameterize relevant constants
         )
+
         self.redrilling_annual_cost = self.OutputParameterDict[self.redrilling_annual_cost.Name] = OutputParameter(
             Name="Redrilling costs",
             UnitType=Units.CURRENCYFREQUENCY,
@@ -1909,7 +1916,17 @@ def __init__(self, model: Model):
             display_name='Power plant maintenance costs',
             UnitType=Units.CURRENCYFREQUENCY,
             PreferredUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR,
-            CurrentUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR
+            CurrentUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR,
+            # TODO parameterize relevant constants
+            # TODO update index year and/or make indexing parameterizable
+            ToolTipText='GEOPHIRES estimates the annual surface plant O&M costs as the sum of 1.5% of the total plant '
+                        'capital cost (for annual non-labor costs), and 75% of the annual labor costs. The other 25% '
+                        'of the labor costs are assigned to the wellfield O&M cost. The labor costs are calculated '
+                        'internally in GEOPHIRES using the 2014 labor costs provided by Beckers (2016), indexed to '
+                        '2017 using the Bureau of Labor Statistics (BLS) Employment Cost Index for utilities (2018). '
+                        'The original 2014 labor cost correlation expresses the labor costs as a function of the plant '
+                        'size (MW) using an approximate logarithmic curve fit to the built-in labor cost data in '
+                        'GETEM.'
         )
         # noinspection SpellCheckingInspection
         self.Cgath = self.OutputParameterDict[self.Cgath.Name] = OutputParameter(

src/geophires_x_schema_generator/geophires-result.json

@@ -472,12 +472,12 @@
       "properties": {
         "Wellfield maintenance costs": {
           "type": "number",
-          "description": "O&M Wellfield cost",
+          "description": "O&M Wellfield cost. The built-in correlation for the wellfield O&M costs is similar as the surface plant O&M costs: it assumes that it consists of 1% of the total wellfield plus field gathering system costs (for annual non-labor costs) and 25% of the labor costs (the other 75% of the labor costs are assigned to the surface plant O&M costs).",
           "units": "MUSD/yr"
         },
         "Power plant maintenance costs": {
           "type": "number",
-          "description": "O&M Surface Plant costs",
+          "description": "O&M Surface Plant costs. GEOPHIRES estimates the annual surface plant O&M costs as the sum of 1.5% of the total plant capital cost (for annual non-labor costs), and 75% of the annual labor costs. The other 25% of the labor costs are assigned to the wellfield O&M cost. The labor costs are calculated internally in GEOPHIRES using the 2014 labor costs provided by Beckers (2016), indexed to 2017 using the Bureau of Labor Statistics (BLS) Employment Cost Index for utilities (2018). The original 2014 labor cost correlation expresses the labor costs as a function of the plant size (MW) using an approximate logarithmic curve fit to the built-in labor cost data in GETEM.",
           "units": "MUSD/yr"
         },
         "Water costs": {