aquakin.CostFactors#

class aquakin.CostFactors(currency='USD', energy_price=0.12, carbon_price=0.5, sludge_disposal_price=0.35, biogas_value=0.2, ghg_price=0.0, capex_annual=0.0)[source]#

Bases: object

Unit prices for monetising a plant’s operating cost.

All prices are in the chosen currency per the named physical unit. Defaults are representative order-of-magnitude values (USD); set them to a site’s actual tariffs for a real estimate.

Variables:

  • currency (str) – Currency label for the report (informational).

  • energy_price (float) – Electricity price (currency / kWh).

  • carbon_price (float) – External-carbon (e.g. methanol) price (currency / kg COD dosed).

  • sludge_disposal_price (float) – Sludge disposal / hauling cost (currency / kg TSS).

  • biogas_value (float) – Value of recovered biogas methane (currency / kg CH₄) – a credit. Set 0 to ignore the credit (e.g. flared biogas).

  • ghg_price (float) – Carbon price applied to the net CO₂e footprint (currency / kg CO₂e), default 0 (no carbon charge). Only used when a footprint is supplied.

  • capex_annual (float) – Annualised capital cost (currency / yr), spread evenly over the year, default 0.

Parameters:

  • currency (str)

  • energy_price (float)

  • carbon_price (float)

  • sludge_disposal_price (float)

  • biogas_value (float)

  • ghg_price (float)

  • capex_annual (float)

__init__(currency='USD', energy_price=0.12, carbon_price=0.5, sludge_disposal_price=0.35, biogas_value=0.2, ghg_price=0.0, capex_annual=0.0)#
Parameters:

  • currency (str)

  • energy_price (float)

  • carbon_price (float)

  • sludge_disposal_price (float)

  • biogas_value (float)

  • ghg_price (float)

  • capex_annual (float)

Return type:

None

Methods

__init__([currency, energy_price, ...])

Attributes

biogas_value

capex_annual

carbon_price

currency

energy_price

ghg_price

sludge_disposal_price