Running exhaust emissions factors for buses from United States (MOVES3 model)

Source: R/ef_usa_moves.R

Returns a vector or data.frame of emission factors for urban buses based on values from the MOVES3 Model. Emission factor estimates are expressed in units 'g/km'.

ef_usa_moves(
  pollutant,
  model_year,
  reference_year = 2020,
  speed,
  fuel = "D",
  as_list = TRUE
)

Arguments

pollutant

character. Pollutants: "CH4" (Methane), "CO" (Carbon Monoxide), "CO2" (Carbon Dioxide), "EC" (Energy Consumption), "HONO" (Nitrous Acid), "N2O" (Nitrous Oxide), "NH3" (Ammonia ), "NH4" (Ammonium), "NO" (Nitrogen Oxide), "NO2" (Nitrogen Dioxide), "NO3" (Nitrate), "NOx" (Oxides of Nitrogen), "PM10" (Primary Exhaust PM10 - Total), "PM25" (Primary Exhaust PM2.5 - Total), "SO2" (Sulfur Dioxide), "THC" (Total Gaseous Hydrocarbons ), "TOG" (Total Organic Gases) and "VOC" (Volatile Organic Compounds)

model_year

numeric. Model year of vehicle.

reference_year

numeric. Year of reference, in which the emissions inventory is estimated. Default is 2020. Values between 2015 - 2022.

speed

units. Speed in 'km/h'. Emission factor are returned in speed intervals: "0-2.5", "2.5-7.5", "7.5-12.5", "12.5-17.5", "17.5-22.5", "22.5-27.5", "27.5-32.5", "32.5-37.5", "37.5-42.5", "42.5-47.5", "47.5-52.5", "52.5-57.5", "57.5-62.5", "62.5-67.5", "67.5-72.5", ">72.5" mph (miles/h).

fuel

character. Type of fuel: 'D' (Diesel),'G' (Gasoline), 'CNG' (Compressed Natural Gas). Default is 'D'.

as_list

logical. If TRUE (default), the function returns the output in a list format. If FALSE, the output is returned in a data.table format.

Value

List. Emission factors in units 'g/km' by speed and model_year.

Details

Users can view the pre-processed database in data(ef_usa_moves_db) function.

See also

Other Emission factor model: ef_brazil_cetesb(), ef_europe_emep(), ef_scaled_euro(), ef_usa_emfac(), emi_europe_emep_wear()

Examples

df <- ef_usa_moves(
         pollutant = c("CO","PM10"),
         model_year = 2015,
         speed = units::set_units(10:100,"km/h"),
         reference_year = 2016,
         fuel = "D",
         as_list = TRUE
        )