Automobile Trip impact calculation

Provided in real time by Brighter Planet at 07:55AM UTC on Wednesday, May 24, 2017 for timeframe beginning 2017-01-01 and ending 2018-01-01.

Errors

Characteristics

Brighter Planet is performing this calculation based on the following characteristics of this automobile_trip as provided in the request:

Characteristic Input Interpretation
Fuel use 68.1 68.1 l

Calculation

This calculation uses version of Brighter Planet's automobile_trip carbon model. The automobile trip emission estimate is the total anthropogenic emissions from fuel and air conditioning used by the automobile during the trip. It includes CO2 emissions from combustion of non-biogenic fuel, CH4 and N2O emissions from combustion of all fuel, and fugitive HFC emissions from air conditioning. For vehicles powered by grid electricity it includes the emissions from generating that electricity.

Calculations are performed adaptively, so methodology will vary depending on automobile_trip characteristics. Impact values, listed below, are based on a number of input factors, which in turn are based on others, and so forth. In each case, the methodology used in the calculation is specified, and, wherever possible, the source code of the method is displayed.

  1. Carbon

    Conclusion: 160.1 kg

    Method: from co2 emission, ch4 emission, n2o emission, and hfc emission.

    (((co2_emission + ch4_emission) + n2o_emission) + hfc_emission)
    
  2. Co2 emission

    Conclusion: 159.7877335706324

    Method: from fuel use during timeframe and co2 emission factor.

    (fuel_use_during_timeframe * co2_emission_factor)
    
  3. Co2 biogenic emission

    Conclusion: 0.0

    Method: from fuel use during timeframe and co2 biogenic emission factor.

    (fuel_use_during_timeframe * co2_biogenic_emission_factor)
    
  4. Ch4 emission

    Conclusion: 0.0068654768530854275

    Method: from distance during timeframe and ch4 emission factor.

    (distance_during_timeframe * ch4_emission_factor)
    
  5. N2o emission

    Conclusion: 0.09253658523860853

    Method: from distance during timeframe and n2o emission factor.

    (distance_during_timeframe * n2o_emission_factor)
    
  6. Hfc emission

    Conclusion: 0.16943761344

    Method: from distance during timeframe and hfc emission factor.

    (distance_during_timeframe * hfc_emission_factor)
    
  7. Co2 emission factor

    Conclusion: 2.346369068584911

    Method: from automobile fuel.

    automobile_fuel.co2_emission_factor
    
  8. Co2 biogenic emission factor

    Conclusion: 0.0

    Method: from automobile fuel.

    automobile_fuel.co2_biogenic_emission_factor
    
  9. Ch4 emission factor

    Conclusion: 0.0004202975765289705

    Method: from automobile fuel.

    automobile_fuel.ch4_emission_factor
    
  10. N2o emission factor

    Conclusion: 0.005664996525124796

    Method: from automobile fuel.

    automobile_fuel.n2o_emission_factor
    
  11. Hfc emission factor

    Conclusion: 0.0103728

    Method: from activity year.

    activity_year.hfc_emission_factor
    
  12. Activity year

    Conclusion: 2009

    Method: from date.

    AutomobileActivityYear.find_by_closest_year(date.year)
    
  13. Energy

    Conclusion: 2361.5 MJ

    Method: from fuel use during timeframe and automobile fuel.

    (fuel_use_during_timeframe * automobile_fuel.energy_content)
    
  14. Fuel use during timeframe

    Conclusion: 68.1 l

    Method: from fuel use, date, and timeframe.

    date = if date.is_a?(Date) then
      date
    else
      Date.parse(date.to_s)
    end
    timeframe.include?(date) ? (fuel_use) : (0)
    
  15. Distance during timeframe

    Conclusion: 16.3348 km

    Method: from distance, date, and timeframe.

    date = if date.is_a?(Date) then
      date
    else
      Date.parse(date.to_s)
    end
    timeframe.include?(date) ? (distance) : (0)
    
  16. Distance

    Conclusion: 16.3348 km

    Method: default.

    Country.fallback.automobile_trip_distance
    
  17. Speed

    Conclusion: 50.94382232429702 km/h

    Method: from urbanity.

    (1 / ((urbanity / Country.fallback.automobile_city_speed) + ((1 - urbanity) / Country.fallback.automobile_highway_speed)))
    
  18. Fuel efficiency

    Conclusion: 8.226530750610781 km/l

    Method: from hybridity multiplier.

    (Country.fallback.automobile_fuel_efficiency * hybridity_multiplier)
    
  19. Automobile fuel

    Conclusion: fallback

    Method: default.

    AutomobileFuel.fallback
    
  20. Hybridity multiplier

    Conclusion: 1.0

    Method: default.

    1.0
    
  21. Urbanity

    Conclusion: 0.43

    Method: default.

    Country.fallback.automobile_urbanity
    
  22. Date

    Conclusion: 2017-01-01

    Method: from timeframe.

    timeframe.from
    

Estimate provided by Brighter Planet CM1. Calculations are performed using data from a variety of public sources. To cite this estimate, credit Brighter Planet, "Automobile Trip impact calculation." <http://impact.brighterplanet.com/automobile_trips?fuel_use=68.1&timeframe=2017-01-01%2F2018-01-01>, retrieved 2017-05-24T07:55:44Z.