Feedstock Transportation Emissions

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6 months 1 week ago #462 by Bellar
Feedstock Transportation Emissions was created by Bellar
Hi,

I have been experimenting with changing transportation distances for feedstock and fuels.

I have noticed that, for example, adding 100km trucking to feedstock transportation has a bigger effect on results than the same for fuel transportation.

Is there any resource to understand how this allocation of emissions works for feedstock transportation?

Many thanks

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6 months 5 days ago #463 by doconnor
Replied by doconnor on topic Feedstock Transportation Emissions
Some of the feedstocks in GHGenius are entered on a dry weight basis with with moisture content specified on the Fuel Char sheet. For these feedstocks the transportation emissions are calculated including the moisture. This will result in the difference that you have identified.

Regards
Don O'Connor

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6 months 3 days ago #464 by Bellar
Replied by Bellar on topic Feedstock Transportation Emissions
Thanks for your reply, Don.

I notice for some feedstocks, such as yellow grease, there is no moisture fraction given. I notice the same thing for these feedstocks.

Is the feedstock to fuel yield also taken into account, to allocate the feedstock transportation emissions per energy of finished fuel? And if so, is there any documentation to explain this?

Many thanks

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6 months 2 days ago #465 by doconnor
Replied by doconnor on topic Feedstock Transportation Emissions
Feedstock moisture content is only required for those pathways where the feedstock is entered in the model on a dry weight basis.

This would include wood, ag residues, manure, sewage sludge, organics, MSW.

Feedstocks such as grains and oilseeds have pretty constant moisture contents and these values are entered into the model on n as received basis.

Yes the feedstock to fuel ratio impacts the transportation emissions per GJ of fuel.

The feedstock moisture content for yellow grease is dealt with through the feedstock to fuel ratio.

Regards
Don O'Connor

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