Calculates the appropriate carbon dioxide (CO2) emission factor (g/kWh) for the given parameters.

calcEF_CO2(engineType, location, loadFactor = NULL, main_aux_boiler = "main")

Arguments

engineType

Engine type (vector of strings) (see calcEngineType). Valid values are:

  • "SSD"

  • "MSD"

  • "MSD-ED"

  • "GT"

  • "GT-ED"

  • "ST"

  • "LNG"

  • "HSD" (auxiliary only)

  • "Boiler" (boiler only)

location

Location of vessel (vector of strings). Valid values are:

  • "ECA"

  • "OutsideECA"

  • "GreatLakes"

loadFactor

Fractional percentage (between 0 and 1) of main engine required to propel vessel at given speed (vector of numericals) (see ShipPowerModel library). This parameter is optional. By default, it is not used and the resulting emission factor is independent of engine load.

main_aux_boiler

Is this calculation for a propulsive (main), auxiliary (aux), or boiler engine? Options:

  • "main" (Default)

  • "aux"

  • "boiler"

Value

EF_CO2 (g/kWh) (vector of numericals)

Details

Location is important for determining the fuel being used, as type of fuel typically used varies by location.

For more information about calculating CO2 emission factors, see Section 3.5.6 of the Port Emissions Inventory Guidance.

References

EPA. 2020. "Ports Emissions Inventory Guidance: Methodologies for Estimating Port-Related and Goods Movement Mobile Source Emissions." Ann Arbor, MI: Office of Transportation and Air Quality. US Environmental Protection Agency.

Examples

calcEF_CO2(engineType = c("SSD","MSD","LNG"), location = c("ECA","OutsideECA","GreatLakes"), loadFactor=c(0.3,.7,.9), main_aux_boiler = "main")
#> co2 #> 1: 657.1362 #> 2: 673.4936 #> 3: 460.8596
calcEF_CO2(engineType = c("SSD","SSD","LNG"), location = c("ECA","ECA","GreatLakes"), main_aux_boiler = "main")
#> co2 #> 1: 593.11 #> 2: 593.11 #> 3: 456.50
calcEF_CO2(engineType = c("HSD","MSD","LNG"), location = c("ECA","ECA","GreatLakes"),main_aux_boiler="aux")
#> co2 #> 1: 695.702 #> 2: 695.702 #> 3: 456.500
calcEF_CO2(engineType = c("MSD","SSD"), location = c("ECA","OutsideECA"), main_aux_boiler = "boiler")
#> co2 #> 1: 961.80 #> 2: 949.77