Topic: Transport Analysis problem with resultsSubscribe | Previous | Next
Diane Marie Deocampo 6/2/2019
Good day!
My partner and I have been having a problem with the LEAP results that we obtained because it does not match or does not have a similar pattern with our calculations manually. We used the equations from transport analysis on our excel file as our basis of the expected positive or negative avoidance of CO2 and CH4 when using alternative fuels (LPG, CNG).
Using LEAP, it shows negative avoidance of CO2 when using LPG instead of diesel. Right now we are using version 1.25. The information that we used for our manual calculations are the same with LEAP but they have different results. Attached here is the file for your reference.
Your response would be greatly appreciated.
Thank you very much
Your response would be greatly appreciated.
Thank you very much
aaaa (4).leap [7]
Emily Ghosh 6/26/2019
Hi Diane,
So sorry for the delayed response. I reviewed your model, and it appears that under most categories, LPG vehicles have a lower fuel economy compared to CNG and Gasoline vehicles, so it requires more energy to cover the same distance. This may be the reason why the LPG scenario appears to have higher CO2 levels than the other scenarios.
I would also check that you are using the same fuel characteristics in your calculations as the ones that are currently being used in LEAP. To review this, go into General --> Fuels. These are default values, so feel free to edit based on the fuel characteristics in the region you are studying.
Hope this helps,
Emily
Emily