Equation helpers for ACM0009 — acm0009

Functions translating the ACM0009 baseline, project, leakage, and net emission equations for natural-gas fuel switching projects.

calculate_baseline_emissions_acm0009(fuel_consumption_tonnes, net_calorific_value_gj_per_tonne, emission_factor_tco2_per_gj)

calculate_project_emissions_acm0009(gas_consumption_nm3, net_calorific_value_gj_per_nm3, emission_factor_tco2_per_gj, methane_slip_tonnes = 0, gwp_ch4 = 28)

calculate_leakage_emissions_acm0009(pipeline_leakage_tco2e = 0, upstream_leakage_tco2e = 0, auxiliary_electricity_mwh = 0, grid_emission_factor_tco2_per_mwh = 0)

calculate_net_emission_reductions_acm0009(baseline_emissions_tco2e, project_emissions_tco2e, leakage_emissions_tco2e)

Arguments

fuel_consumption_tonnes: Numeric vector of baseline coal or petroleum fuel consumption in tonnes during the monitoring period.
net_calorific_value_gj_per_tonne: Net calorific value of the baseline fuel expressed in gigajoules per tonne.
emission_factor_tco2_per_gj: Carbon dioxide emission factor for the fuel expressed in tonnes CO₂ per gigajoule.
gas_consumption_nm3: Measured natural gas consumption in normal cubic metres for the project scenario.
net_calorific_value_gj_per_nm3: Net calorific value of the natural gas in gigajoules per normal cubic metre.
methane_slip_tonnes: Quantity of unburned methane released from the gas system, expressed in tonnes.
gwp_ch4: Global warming potential applied to methane slip, defaulting to the 100-year value adopted by ACM0009.
pipeline_leakage_tco2e: Emissions attributed to project-side pipeline leaks, in tonnes CO₂e.
upstream_leakage_tco2e: Leakage from gas extraction, processing, or transport attributable to the fuel switch, in tonnes CO₂e.
auxiliary_electricity_mwh: Auxiliary electricity consumption associated with the retrofit, in megawatt-hours.
grid_emission_factor_tco2_per_mwh: Emission factor for the grid electricity used to operate the converted plant, in tonnes CO₂ per megawatt-hour.
baseline_emissions_tco2e: Baseline emissions computed for the monitoring period in tonnes CO₂e.
project_emissions_tco2e: Project scenario emissions in tonnes CO₂e.
leakage_emissions_tco2e: Total leakage emissions to be deducted from the project results, in tonnes CO₂e.

Value

Numeric vectors containing the calculated baseline, project, leakage, and net emission reductions for each observation.

Examples

baseline <- calculate_baseline_emissions_acm0009(
  fuel_consumption_tonnes = 120000,
  net_calorific_value_gj_per_tonne = 26.5,
  emission_factor_tco2_per_gj = 0.094
)
project <- calculate_project_emissions_acm0009(
  gas_consumption_nm3 = 220000000,
  net_calorific_value_gj_per_nm3 = 0.038,
  emission_factor_tco2_per_gj = 0.0561,
  methane_slip_tonnes = 12
)
leakage <- calculate_leakage_emissions_acm0009(
  pipeline_leakage_tco2e = 450,
  upstream_leakage_tco2e = 820,
  auxiliary_electricity_mwh = 1500,
  grid_emission_factor_tco2_per_mwh = 0.75
)
calculate_net_emission_reductions_acm0009(baseline, project, leakage)
#> [1] 1637246