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Dear community, 

I am currently researching a waste incineration plant that produces steam and electricity. The final product is steam, and we would like to draw up an LCA for this steam according to the cut-off approach. The steam is sold to third parties and the electricity is partly delivered to the grid and partly used to run the plant. The plant runs most of the time on self-generated electricity and needs very little electricity from the grid. See the figure for simplified overview of the process. 

I have two questions about this process:

How do you deal with the fact that this self-generated electricity has an unknown emission factor? Since this emission factor depends on the process with which this electricity is generated in our incineration plant. 

What is the best way to deal with the electricity that is delivered back to the installation in an LCA, what is the principle behind this and how can this best be modelled?

Any responses are greatly appreciated.

Kind regards, 

Edwin

in Miscellaneous by (140 points)

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