ef_brazil_cetesb {gtfs2emis}

Running exhaust emissions factors for buses from Brazil (CETESB)

Description

Returns a vector or data.table of emission factors for buses based on estimates from the Environment Company of Sao Paulo, Brazil (CETESB) 2019. Emission factor estimates are expressed in units 'g/km'.

Usage

ef_brazil_cetesb(pollutant, veh_type, model_year, as_list = TRUE)

Arguments

pollutant

character. Pollutants "CH4", "CO2", "PM10", "N2O", "NOx", "NO2", "NO", "RCHO", "ETOH" "KML" (Vehicle Kilometers Traveled), "FC" (Fuel Consumption), "gD/KWH" (grams of Diesel per kWh), "gCO2/KWH" (grams of CO2 per per kWh), "CO", "HC" (Total Hydrocarbon), "NMHC" (Non-Methane Hydrocarbon), "FS"(Fuel Sales) and "NH3".

veh_type

character. Vehicle categories by fuel: "BUS_URBAN_D", "BUS_MICRO_D", "BUS_COACH_D" and "BUS_ARTIC_D".

model_year

numeric. Vehicle model year. Supports model_year from 1960 to 2020.

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.

Details

The new convention for vehicles names are translated from CETESB report:

vehicle	description
BUS_URBAN_D	Urban Bus Diesel (5perc bio-diesel)
BUS_MICRO_D	Micro Urban Bus Diesel (5perc bio-diesel)
BUS_COACH_D	Coach (inter-state) Bus Diesel (5perc bio-diesel)
BUS_ARTIC_D	Articulated Urban Bus Diesel (5perc bio-diesel)

The percentage varies of biofuels varies by law.

These emission factors are not exactly the same as the report of CETESB.

1. In this emission factors, there is also NO and NO2 based on split by published in the EMEP/EEA air pollutant emission inventory guidebook.

2. Also, the emission factors were extended till 50 years of use, repeating the oldest value.

Value

data.table. Emission factors in units 'g/km' by model_year.

Source

https://cetesb.sp.gov.br/veicular/relatorios-e-publicacoes/

See Also

Other Emission factor model: ef_europe_emep(), ef_scaled_euro(), ef_usa_emfac(), ef_usa_moves()

Examples

df <- ef_brazil_cetesb(
          pollutant = c("CO","PM10","CO2","CH4","NOx"),
          veh_type = "BUS_URBAN_D",
          model_year = 2015,
          as_list = TRUE)