Add two new sco2 configurations

[taylorbrown75]

Description

Add recompression with htr bypass and turbine split flow cycles to sco2 design point models.

Corresponding branches and PRs:

wex, lk: develop
sam: sco2_py_samples

Unit Test Impact:

Added unit tests to run the design point of each configuration; compares efficiency, HTF outlet temperature, and cycle cost to hardcoded results. One of the tests may take ~30 seconds (can remove if necessary). No change to test_results file.

Checklist

• adds, removes, modifies, or deletes variables in existing compute modules
• I've tagged this PR to a milestone

[taylorbrown75]

TODO: Update documentation https://github.com/NREL/SAM/blob/develop/samples/CSP/sco2_analysis_python_V2/example/User_Guide.pdf

[coveralls]

Pull Request Test Coverage Report for Build 18385148713

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3013 unchanged lines in 13 files lost coverage.
• Overall coverage increased (+0.9%) to 57.595%

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Files with Coverage Reduction	New Missed Lines	%
ssc/tcs/sco2_cycle_components.h	1	99.2%
ssc/tcs/sco2_recompression_cycle.h	6	90.06%
ssc/tcs/heat_exchangers.h	10	83.08%
ssc/tcs/sco2_cycle_templates.h	14	90.6%
ssc/tcs/sco2_partialcooling_cycle.h	17	60.4%
ssc/ssc/csp_common.cpp	32	75.67%
ssc/tcs/sco2_pc_csp_int.h	55	54.29%
ssc/ssc/cmod_sco2_csp_system.cpp	200	42.26%
ssc/tcs/sco2_cycle_components.cpp	219	66.33%
ssc/tcs/sco2_recompression_cycle.cpp	340	59.85%

Totals
Change from base Build 18355581094:	0.9%
Covered Lines:	68983
Relevant Lines:	119772

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💛 - Coveralls

[taylorbrown75]

TODO: Update documentation https://github.com/NREL/SAM/blob/develop/samples/CSP/sco2_analysis_python_V2/example/User_Guide.pdf

Updated User Guide https://github.com/NREL/SAM/blob/develop/samples/CSP/sco2_analysis_python_V2/example/User_Guide.pdf

[taylorbrown75]

Linked to PR https://github.com/NREL/SAM/pull/2118

[Copilot]

Pull Request Overview

This PR adds two new sCO2 configurations to the sCO2 design point models: recompression with HTR bypass and turbine split flow cycles. The changes include new cycle classes, supporting methods, and comprehensive unit tests.

• New HTR bypass and turbine split flow cycle configurations with optimization capabilities
• Enhanced cycle error handling and thermal efficiency threshold features
• Updated cost calculations with inflation factors and improved temperature-dependent costing
• Comprehensive unit tests for design point validation of all configurations

Reviewed Changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/ssc_test/cmod_sco2_csp_system_test.cpp	Added unit tests for all sCO2 configurations and helper functions
tcs/sco2_htrbypass_cycle.h/.cpp	New HTR bypass cycle class with nested optimization architecture
tcs/sco2_turbinesplitflow_cycle.h/.cpp	New turbine split flow cycle class with secondary turbine support
tcs/sco2_pc_csp_int.h/.cpp	Enhanced interface to support new configurations and improved error handling
tcs/sco2_recompression_cycle.h/.cpp	Updated constructors and improved error handling with eta threshold
tcs/sco2_partialcooling_cycle.h/.cpp	Updated constructors and improved error handling with eta threshold
tcs/sco2_cycle_templates.h	Added new state point enums and error handling framework
tcs/sco2_cycle_components.h/.cpp	Enhanced cost calculations with inflation factors
tcs/heat_exchangers.h/.cpp	Updated to include inflation year parameter in cost calculations
tcs/CMakeLists.txt	Added new source files to build configuration

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[taylorbrown75]

Update changelog tags when merged into develop. https://github.com/NREL/SAM/blob/sco2_py_samples/samples/CSP/sco2_analysis_python_V2/changelog.md