This model tries to show the effect of car-sharing (CS) and its possible effect on reducing CO2 emission over a time period of 20 years. The main target of car-sharing is to reduce individual car ownership and the total number of cars on. In addition to that, with more fuel-efficient cars and the increased use of electric cars it could be an effective tool to reduce CO2 emissions.
We assumed that the total travel demand (yearly driven passenger units) shifts from private car ownership to CS services over a time of 20 years [1]. The possibility of buying a private car and a CS car is calculated by dividing the travel demand and the maximal travel demand possible, multiplied by the number of families without a private car respectively with the number of CS families. Private cars will abrade increasing the number of families without a car. However, in our model they will decide to join CS thereby increasing the number of CS families. By this the number of private cars will decrease while number of CS cars will increase. Gasoline CS cars will change over time into electric CS cars with a benefit for the CO2 emission due to lower lifecycle emission. Since CS cars are utilized more, they will abrade faster. However, this will overall result in more fuel efficient cars with another benefit for CO2 emissions.
Private Autos(100.000) Familien ohne private Autos(20.000) CS Familien(1.000) CS Autos - Benzin( 5.000) Bedarf private Autos(1.920.000.000 yearly passanger distance) Umstiegsrate(0.25) Kraftstoffeffizienz(0.15) CO2 emission of gasoline car(24 t CO2) [2] CO2 emission of electric car(19 t CO2)[2]
Thing to try (with influence on CO2 emission of CS cars):
Change the exchange-rate with which CS cars with gasoline motor are exchanged by electric motor Change the fuel-efficiency of CS cars Both will influence the reduction of CO2 emission by CS cars
Extending the model:Demand for public transportation Would create a more realistic model since there are not only the options of having a private car or using CS.Public transportation could help reduce overall CO2 emissions.
Credits and references:
Cornelius Frank & Ameur GlouiaDepartment of Bioengineering SciencesWeihenstephan-Triesdorf University of Applied Science85354 Freising, Germanycornelius.frank@student.hswt.de / ameur.glouia@student.hswt.de
[1] Kawaguchi, T. (2019). Scenario Analysis of Car- and Ride-Sharing Services Based on Life Cycle Simulation. Procedia CIRP. 80: 328-333
[2] Low Carbon Vehicle Partnership. (2015). Lifecycle emissions from cars.
