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Consultation on amending depreciation percentage #144

Open zasddsgg opened 1 week ago

zasddsgg commented 1 week ago

Hello, if I want to use the following depreciation percentage (0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1) for depreciation and steam_power_depreciation when performing TEA, may I ask you which code should be used? It seems like I can only choose a few (such as MACRS7) from the tutorials (https://biosteam.readthedocs.io/en/latest/API/TEA.html#:~:text=depreciation_schedules%3A%20dict,0.045%2C%200.045%2C%200.022%5D)%7D).

The TEA code is as follows.

tea = cls(
        system=sys, 
        IRR=0.10, 
        duration=(2007, 2037),
        depreciation='MACRS7', 
        income_tax=0.35,
        operating_days=350.4,
        lang_factor=None, 
        construction_schedule=(0.08, 0.60, 0.32),
        startup_months=3, 
        startup_FOCfrac=1,
        startup_salesfrac=0.5,
        startup_VOCfrac=0.75,
        WC_over_FCI=0.05,
        finance_interest=0.08,
        finance_years=10,
        finance_fraction=0.4,
        OSBL_units=OSBL_units,
        warehouse=0.04, 
        site_development=0.09, 
        additional_piping=0.045,
        proratable_costs=0.10,
        field_expenses=0.10,
        construction=0.20,
        contingency=0.10,
        other_indirect_costs=0.10, 
        labor_cost=2.5e6,
        labor_burden=0.90,
        property_insurance=0.007, 
        maintenance=0.03,
        steam_power_depreciation='MACRS20',
        boiler_turbogenerator=BT)