LNG CI

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1 year 6 days ago #127 by clarice.vassallo
LNG CI was created by clarice.vassallo
Hello,

I would like to calculate the carbon intensity associated with LNG using the 4.03a version of GHGenius. Natural gas is sourced from the grid and liquefied within the LNG facility with few by-products, as it comes very “clean” already. We have the information on natural gas composition, and we would like to identify all inputs in the tool to support the facility to measure all the necessary data for an accurate CI.
So far, I could identify the following for LNG production:
• Input on facility energy and leakages at ‘service stations tab” columns C19 TO C27.
• Results taken from: Upstream Results HHV, cell Q8 to Q19.
What other inputs can be used in the tool to calculate this CI?

thank you in advance,
regards,
Clarice

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1 year 4 days ago #128 by doconnor
Replied by doconnor on topic LNG CI
This pathway does not have a lot of inputs in version 4.03a. The ones that you have identified are all that there are for the production.

On the Input sheet there are transportation parameters in column AN rows 92 to 102.

Regards

Don O'Connor

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11 months 4 weeks ago #129 by clarice.vassallo
Replied by clarice.vassallo on topic LNG CI
Thank you!
best regards,
Clarice

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11 months 1 week ago #133 by clarice.vassallo
Replied by clarice.vassallo on topic LNG CI
Thank you again for this response.
I have one follow-up question regarding the LNG carbon intensity:

Could you help me understand if the carbon intensity results include flaring of gases that are not reused/recovered or are assumed only fugitive emissions of those gases? Would it be possible to enter the specific amount of gas flared in the process for more accurate results?

Thank you,
Regards,
Clarice

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11 months 5 days ago #134 by doconnor
Replied by doconnor on topic LNG CI
Clarice

On the Service Station sheet, the losses of NG from the liquefaction process can be specified in cells C9, C10, C12, C13.

There can be losses at the plant and in the transfers. The average loss for each stage is entered in C9 and then the number of stages where losses might happen is in C10. This could be up to 3, plant to truck, truck to dispensing station, dispensing station to final use. It could be less depending on the scenario.

The loss rate could change over time, C12 and some of the losses might be captured and used for another application (C13). If there are reductions in time then the base year for the data needs to be specified in C11.

Regards
Don O'Connor

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11 months 5 days ago #135 by clarice.vassallo
Replied by clarice.vassallo on topic LNG CI
Thank you. I would like to understand how the tool accounts for the GHG emissions associated with these "losses". Is it assumed that these "losses" are directly released into the atmosphere or are flared?

thanks,
regards,
Clarice

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11 months 5 days ago #136 by doconnor
Replied by doconnor on topic LNG CI
Clarice
They are direct emissions to the atmosphere.

If they are flared in actual practice you would account for that as natural gas used in the process by including the energy in cell C20 and making the change in the fraction of energy that is from electricity in cell C21.

Regards
Don O'Connor

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11 months 5 days ago #137 by clarice.vassallo
Replied by clarice.vassallo on topic LNG CI
Thank you!

kind regards,

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