Update field gathering cost tooltip text from theoretical basis (NREL#427)

Author: softwareengineerprogrammer

src/geophires_x/Economics.py

@@ -1897,12 +1897,23 @@ def __init__(self, model: Model):
             PreferredUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR,
             CurrentUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR
         )
+        # noinspection SpellCheckingInspection
         self.Cgath = self.OutputParameterDict[self.Cgath.Name] = OutputParameter(
             Name="Field gathering system cost",
             display_name='Field gathering system costs',
             UnitType=Units.CURRENCY,
             PreferredUnits=CurrencyUnit.MDOLLARS,
-            CurrentUnits=CurrencyUnit.MDOLLARS
+            CurrentUnits=CurrencyUnit.MDOLLARS,
+            # TODO interpolate constant values in tooltip text instead of hardcoding
+            ToolTipText='The built-in cost correlation for estimating the field gathering system cost follows includes '
+                        'the cost for surface piping from each well to the plant and pumps for production and '
+                        'injection wells. The length of the surface piping is assumed 750 m per well at a cost of '
+                        '$500 per meter. The pumping cost for each  pump in the production wells (line-shaft pumps) '
+                        'and a single pump for the injection wells is calculated with the same correlation as GETEM. '
+                        'An additional 15% is added for contingency and 12% for indirect costs. '
+                        'The built-in cost correlation does not include the cost of pipelines to an off-site heat '
+                        'user or a district-heating system. These costs are estimated at $750 per meter pipeline '
+                        'length and can be manually added by the user to the pipeline distribution costs.'
         )
         self.Cpiping = self.OutputParameterDict[self.Cpiping.Name] = OutputParameter(
             Name="Transmission pipeline costs",

src/geophires_x_schema_generator/geophires-result.json

@@ -420,7 +420,7 @@
         },
         "Field gathering system costs": {
           "type": "number",
-          "description": "Field gathering system cost",
+          "description": "Field gathering system cost. The built-in cost correlation for estimating the field gathering system cost follows includes the cost for surface piping from each well to the plant and pumps for production and injection wells. The length of the surface piping is assumed 750 m per well at a cost of $500 per meter. The pumping cost for each  pump in the production wells (line-shaft pumps) and a single pump for the injection wells is calculated with the same correlation as GETEM. An additional 15% is added for contingency and 12% for indirect costs. The built-in cost correlation does not include the cost of pipelines to an off-site heat user or a district-heating system. These costs are estimated at $750 per meter pipeline length and can be manually added by the user to the pipeline distribution costs.",
           "units": "MUSD"
         },
         "Total surface equipment costs": {},