remove cash flow line item for heat/cooling - same removal logic applies as for electricity to grid and electricity purchase line items

Author: softwareengineerprogrammer

docs/SAM-EM_End-Uses-and-Surface-Applications.md

@@ -30,8 +30,8 @@ typically require parasitic pumping power purchased from the grid. The cost of t
 and fully accounted for within GEOPHIRES' baseline OPEX calculations prior to executing the SAM financial engine.
 
 Because these costs are injected directly into the fixed O&M parameters passed to SAM, SAM's native grid-purchase
-mechanisms are bypassed. Consequently, the specific cash flow line items for `Electricity from grid (kWh)`
-and `Electricity purchase ($)` are intentionally removed from the final SAM cash flow profile report.
+mechanisms are bypassed. Consequently, the specific cash flow line items for `Electricity from grid (kWh)`,
+`Electricity to grid net (kWh)`, and `Electricity purchase ($)` are intentionally removed from the final SAM cash flow profile report.
 This prevents the display of default zero values, which could otherwise mislead analysts into assuming parasitic power
 costs were omitted.
 

src/geophires_x/EconomicsSamCalculations.py

@@ -630,7 +630,7 @@ def _remove_line_item(row_name_: str) -> None:
 
             ret.pop(idx)
 
-        for line_item in ['Electricity from grid (kWh)', 'Electricity purchase ($)']:
+        for line_item in ['Electricity from grid (kWh)', 'Electricity to grid net (kWh)', 'Electricity purchase ($)']:
             _remove_line_item(line_item)
 
         return ret

tests/examples/example_SAM-single-owner-PPA-8_heat.out

@@ -4,10 +4,10 @@
 
 Simulation Metadata
 ----------------------
- GEOPHIRES Version: 3.12.1
- Simulation Date: 2026-04-08
- Simulation Time:  08:15
- Calculation Time:      1.785 sec
+ GEOPHIRES Version: 3.13.0
+ Simulation Date: 2026-04-14
+ Simulation Time:  10:07
+ Calculation Time:      1.867 sec
 
                            ***SUMMARY OF RESULTS***
 
@@ -236,7 +236,6 @@ After-tax net cash flow [construction] ($)       	-17,035,483	-36,740,426 	-28,7
 
 ENERGY
 Electricity to grid (kWh)                        	           	            	0.0         	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0
-Electricity to grid net (kWh)                    	           	            	0.0         	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0
 
 Heat provided (kWh)                              	           	            	0           	2,596,723,692	2,604,861,601	2,607,339,534	2,608,804,668	2,609,828,178	2,610,525,059	2,609,821,916	2,600,140,574	2,591,908,499	2,603,877,334	2,606,856,182	2,608,491,513	2,609,601,068	2,610,396,012	2,610,333,538	2,604,400,594	2,589,770,971	2,602,567,841	2,606,300,154	2,608,147,427	2,609,356,200	2,610,229,374	2,610,551,931	2,607,151,425	2,590,281,491	2,600,607,493	2,605,647,753	2,607,766,188	2,609,091,668	2,610,006,197
 

tests/examples/example_SAM-single-owner-PPA-9_cooling.out

@@ -4,10 +4,10 @@
 
 Simulation Metadata
 ----------------------
- GEOPHIRES Version: 3.12.1
- Simulation Date: 2026-04-05
- Simulation Time:  07:56
- Calculation Time:      1.823 sec
+ GEOPHIRES Version: 3.13.0
+ Simulation Date: 2026-04-14
+ Simulation Time:  10:07
+ Calculation Time:      1.885 sec
 
                            ***SUMMARY OF RESULTS***
 
@@ -245,7 +245,6 @@ After-tax net cash flow [construction] ($)       	-17,323,556	-37,361,714 	-29,2
 
 ENERGY
 Electricity to grid (kWh)                        	           	            	0.0         	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0
-Electricity to grid net (kWh)                    	           	            	0.0         	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0          	0.0
 
 Cooling provided (kWh)                           	           	            	0           	1,869,641,058	1,875,500,352	1,877,284,464	1,878,339,361	1,879,076,288	1,879,578,043	1,879,071,780	1,872,101,213	1,866,174,120	1,874,791,681	1,876,936,451	1,878,113,889	1,878,912,769	1,879,485,128	1,879,440,147	1,875,168,427	1,864,635,099	1,873,848,846	1,876,536,111	1,877,866,147	1,878,736,464	1,879,365,149	1,879,597,391	1,877,149,026	1,865,002,674	1,872,437,395	1,876,066,382	1,877,591,655	1,878,546,001	1,879,204,462