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Subject: Collection of methane gas from landfills
Posted: 11/16/2011 Viewed: 927 times |
we are having difficulties implementing a mitigation policy measure in LEAP such as "Collection of methane gas from landfills".
Should we enter it as an additional branch in the transformation branch with the output fuel "natural gas", the process using the feedstock fuel "Municipal Solid Waste"?
Or should we rather reduce the CO2 emissions stemming from the Non Energy Sector, under the subcategory "Waste"?
Or should we do both, with which interaction, since at the one hand we reduce CO2 emissions from landfills, and at the other hand induce CO2 emissions by maybe using the gas from landfills to heat/power generation, etc.?
Furthermore, wouldn't the presence of gas from landfills increase the (domestic) availability of the resource natural gas (in Resources/Primary/Natural Gas). We tried to change this in LEAP, but somehow could not manage to do this.
We're not sure about the technical nature of this process, or rather how to implement it in LEAP. Is it possible to co-generate heat when collecting gas from landfills?
Thank you for your efforts and your answer.
Subject: Re: Collection of methane gas from landfills
Posted: 11/18/2011 Viewed: 919 times |
As this fits into the waste category, I recommend including direct GHG emissions from landfills in a "Non Energy Sector" subcategory in LEAP and any electricity or heat generation in the transformation categories.
If you want to make these non-energy emissions a function of the amount of waste in a given year, make a key assumption for municipal solid waste and write a function to compare emissions to that variable.
I would recommend creating a new fuel for landfill gas and tracking those reserves separately from natural gas. This can be done through the fuels database. Any additions to reserves will have to be entered into the resources branches either manually or through a formula. Again, this could be linked back to a key assumption about total waste in a given year. This fuel could then also be an input into your Transformation\Electricity Generation module if you wanted to model electricity generation, heat production or CHP.
As quick points of reference, we have a few country reports on our site that have looked into landfill gas as a power generation option and have used LEAP to model that as a part of larger mitigation assesments.
Here are some additional resources:
EIA data on Landfill Gas in the US: http://tinyurl.com/7bkrl64
IEA background info on landfill gas: http://www.iea.org/techno/essentials3.pdf
Hope this helps give you a starting point. Let me know if you have any additional questions.