aquakin.carbon_footprint#

aquakin.carbon_footprint(energy_kwh_per_d, *, grid_factor=0.4, n2o_emission=0.0, methane_production=0.0, ch4_fugitive_fraction=0.0, biogas_recovered_kwh=0.0, gwp_n2o=273.0, gwp_ch4=27.0)[source]#

Assemble a CarbonFootprint from energy use and gas emissions.

Parameters:

  • energy_kwh_per_d (float) – Total electricity draw (kWh/d) – e.g. AE + PE + ME from a BSM2Evaluation.

  • grid_factor (float) – Grid carbon intensity (kg CO₂e/kWh).

  • n2o_emission (float) – Direct N₂O emission as an N₂O-N mass flow (kg N/d), e.g. from aquakin.plant.bsm.direct_n2o_emission().

  • methane_production (float) – Digester methane production (kg CH₄/d).

  • ch4_fugitive_fraction (float) – Fraction of the produced methane that leaks unburned (0–1). The fugitive CH₄ is ch4_fugitive_fraction × methane_production.

  • biogas_recovered_kwh (float) – Electricity the recovered (combusted) biogas displaces (kWh/d) – an avoided-emission credit at grid_factor. Defaults to 0 (no credit); a typical value is the lower heating value of the non-fugitive CH₄ times a CHP electrical efficiency.

  • gwp_n2o (float) – Global warming potentials (kg CO₂e/kg gas).

  • gwp_ch4 (float) – Global warming potentials (kg CO₂e/kg gas).

Return type:

CarbonFootprint