Topic: Global Warming Potential (GWP) calculation of fuelwood and charcoal in LEAPSubscribe | Previous | Next
Dear Taylor,
What are the assumptions when LEAP calculates Global Warming Potential (GWP) of fuelwood and charcoal (biogenic sources of emissions); are they considered sustainable or unsustainable harvests & to what degrees? I use fuelwood and charcoal as cooking fuels in my analysis and the GWP that I obtain is non-zero. Does that mean that harvested wood is unsustainable or the re-plantation does not take place hence there's positive net emissions (i.e. unsustainable harvests)? Where shall I find more information on this?
Many Thanks, Mukesh
1 Like
Hi Mukesh,
Thanks for your question!
The GWP result is calculated from the GWP of the environmental effects specified for a given technology/branch. The GWP for an effect can be edited in the General: Effects screen in Analysis View. Biogenic effects are not included in the GWP calculation as long as they are assigned a GWP of 0.
For more information, refer to the following pages in user guide:
Editing GWP Potential: https://www.energycommunity.org/Help/Supporting_Screens/Effects_Screen.htm
GWP Results https://www.energycommunity.org/Help/Results_Categories/Environmental_Results.htm
You are seeing non-zero GWP values for the fuelwood and charcoal stoves because there are non-biogenic effects assigned to them. To review which pollutants are assigned to these technologies, return to Analysis View, select either the fuelwood or charcoal stove branch, and select the Environmental Loadings tab. Note that you can either manually select the pollutants and enter their emission factors or use the default emission factors included in the Technology and Environmental Database (TED). If you used TED, click on the Technology Database View from the left pane for more information on the source of the environmental loading data and how the emission factors were developed. Then return to Analysis View and go to General:References for bibliographic information (including a URL) for the source.
For more information on specifying Environmental Loadings, click here:
https://www.energycommunity.org/Help/Demand/Environmental_Analysis.htm
Hopefully this helps, but if you have any other questions, please let us know.
Thanks,
Emily
mso-fareast-font-family:"Times New Roman"">Thank you Emily. This is very
helpful.
mso-fareast-font-family:"Times New Roman"">
mso-fareast-font-family:"Times New Roman"">I do have one question though. As there are non-biogenic effects
assigned to the fuelwood and charcoal stoves (CH4. CO, NO, NO2, NMVO etc) hence
non-zero GWP values are reflected. With that token I'm wondering when I switch the
result to 'Carbon Dioxide non-biogenic' - then why does LEAP not provide non-biogenic
effects assigned to fuelwood and charcoal (i.e. excludes fuelwood and charcoal
stoves altogether). I would assume that the result for the 'Carbon Dioxide non-biogenic'
has to include the non-biogenic effects part assigned to fuelwood and charcoal
as well, no? (result for Carbon Dioxide non-biogenic attached)
mso-fareast-font-family:"Times New Roman"">Thanks,
mso-fareast-font-family:"Times New Roman"">Mukesh
Hi Mukesh,