Topic: Multiple fuels and emission factorsSubscribe | Previous | Next
Jimmy Olsson 4/19/2018
Hi!
How does leap handle emission factors when having a transport technology with two fuels?
Best regards,
Jimmy
Emily Ghosh 4/19/2018
Hi Jimmy,
If a transport technology uses two fuels, be sure to have a separate branch for each fuel as shown in the attached screenshot. Then add emission factors for the second fuel. Be sure to set the fuel share (device share), fuel economy, and mileage for the new fuel branch (typically the mileage should be the same value for both fuels). LEAP will then calculate the annual energy demands for each fuel and will calculate the emissions for each fuel individually. You can sum these up to get the total emissions generated for the vehicle type.
Hope this helps!
Emily
Jimmy Olsson 4/20/2018
I see, thanks for the reply. But in my case it doesn't seem that it works as intended. If I set the device share for fuel A to 100% and to 0% for fuel B, and the PM10-emission factors to 0 kg/veh-km for A and 1 kg/veh-km for B, I still see emissions in the result. It seems that LEAP adds the emission despite device share. I hope I made the example clear.
Thanks in advance,
Jimmy
Emily Ghosh 4/20/2018
Hi Jimmy,
Thanks for the additional information. Do you mind sending a copy of your LEAP model so that we can investigate this issue further? Create a .LEAP file through Area --> Backup and either attach the file to your forum reply, or email it to leap@sei.org.
Thanks!
Emily
Jimmy Olsson 4/20/2018