Add sources to test files, Update floating cost to match ORBIT Techni…

…cal report and update to test file
NREL · Jul 7, 2023 · fbd0797 · fbd0797
1 parent f26ee0d
commit fbd0797
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Showing 3 changed files with 18 additions and 7 deletions.
diff --git a/hopp/offshore/floating_platform.py b/hopp/offshore/floating_platform.py
@@ -273,7 +273,7 @@ def calc_substructure_mass_and_cost(mass, area, depth, fab_cost_rate=14500., des
     mooring_mass = (line_mass + anchor_mass)*num_lines #kg
 
     '''Total Platform capex = capex Topside + capex substructure'''
-    total_capex = (topside_cost + substructure_cost + mooring_cost)
+    total_capex = 2*(topside_cost + substructure_cost + mooring_cost)
     platform_capex  = total_capex # USD
     platform_mass   = substructure_total_mass + topside_mass + mooring_mass/1000   # t 
     #mass of equipment and floating substructure for substation

diff --git a/tests/hopp/test_offshore/test_offshore.py b/tests/hopp/test_offshore/test_offshore.py
@@ -5,7 +5,10 @@
 from ORBIT import load_config
 from hopp.offshore.fixed_platform import install_platform, calc_platform_opex, calc_substructure_mass_and_cost
 
-'''https://www.nrel.gov/docs/fy17osti/66874.pdf'''
+'''Sources:
+    - [1] 2017 ORBIT Technical Report: https://www.nrel.gov/docs/fy17osti/66874.pdf
+'''
+
 @pytest.fixture
 def config():
     offshore_path = Path(__file__).parents[3] / "hopp" / "offshore"
@@ -15,6 +18,7 @@ def config():
 def test_install_platform(config):
     '''
     Test the code that calculates the platform installation cost
+    [1]: equations (91),(113),(98)
     '''
     distance = 24
     mass = 2100
@@ -27,6 +31,7 @@ def test_install_platform(config):
 def test_calc_substructure_cost(config):
     '''
     Test the code that calculates the CapEx from fixed_platform.py
+    [1]: equations (81),(83),(84)
     '''
     topmass = 200
     toparea = 1000
@@ -39,6 +44,7 @@ def test_calc_substructure_cost(config):
 def test_calc_substructure_mass(config):
     '''
     Test the code that calculates the CapEx from fixed_platform.py
+    [1]: equations (81),(83),(84)
     '''
     topmass = 200
     toparea = 1000

diff --git a/tests/hopp/test_offshore/test_offshore_floating.py b/tests/hopp/test_offshore/test_offshore_floating.py
@@ -10,8 +10,12 @@
 from ORBIT.core.library import initialize_library
 from ORBIT.phases.design import DesignPhase
 from ORBIT.phases.install import InstallPhase
-#from hopp.offshore.floating_platform import FloatingPlatformDesign
-'''Values for these asserts were used using the equations from https://www.nrel.gov/docs/fy17osti/66874.pdf'''
+
+
+'''Sources:
+    - [1] 2017 ORBIT Technical Report: https://www.nrel.gov/docs/fy17osti/66874.pdf
+'''
+
 @pytest.fixture
 def config():
     offshore_path = Path(__file__).parents[3] / "hopp" / "offshore"
@@ -21,6 +25,7 @@ def config():
 def test_install_platform(config):
     '''
     Test the code that calculates the platform installation cost
+    [1]: equations (91),(113),(98)
     '''
     distance = 24
     mass = 2100
@@ -33,21 +38,21 @@ def test_install_platform(config):
 def test_calc_substructure_cost(config):
     '''
     Test the code that calculates the CapEx from floating_platform.py
-
+    [1]: equations (81),(83),(84)
     '''
     topmass = 200
     toparea = 1000
     depth = 500
 
     cost,_ = calc_substructure_mass_and_cost(topmass, toparea, depth,fab_cost_rate=14500, design_cost=4500000, sub_cost_rate=3000, line_cost=850000, anchor_cost=120000, anchor_mass=20, line_mass=100000, num_lines=4)
 
-    assert pytest.approx(cost) == 11520000
+    assert pytest.approx(cost) == 23040000
 
 
 def test_calc_substructure_mass(config):
     '''
     Test the code that calculates the CapEx from floating_platform.py
-
+    [1]: equations (81),(83),(84)
     '''
     topmass = 200
     toparea = 1000