Losses of natural gas treatment are not included in the hourly calculations

[michieldenhaan]

The energy_treatment_natural_gas node has a 1.4% output loss. Including these losses in the hourly network gas calculation results in an incalculable graph. This is because:

• Including the losses in the time-resolved calculation requires a new node that contains these losses (so we can add a type and profile to this node)
• However, adding this new node means that Refinery can no longer balance imports and exports, as losses depend on total demand of the energy_treatment_natural_gas node and so do imports and exports

Discussed this with @antw and I think there are four possible solutions:

• Remove the losses from the energy_treatment_natural_gas node (they are not on the EB, but maybe we include them to account for the conversion of H-gas to L-gas?)
• Move the losses to energy_national_gas_network_natural_gas (this node already has a 0.1% loss) or maybe to energy_import_natural_gas (if possible).
• Do not include the losses in the hourly calculation (like we do now). This has no effect on the total year volumes in the graph, but it does mean that the hourly demand curves are slightly off. The missing loss is either assigned to the import curve (in a scenario with import of natural gas) or to the export curve (in a scenario where domestic production is higher than demand).
• Alter Refinery such that the graph can be calculated when losses are included. This is possible but not trivial.

Notfiying @AlexanderWirtz, @ChaelKruip, @marliekeverweij: Which option do you prefer?

[marliekeverweij]

I am actually in favor of all solutions except number four (too much work for too little improvement). But my favorite is:

Remove the losses from the energy_treatment_natural_gas node (they are not on the EB, but maybe we include them to account for the conversion of H-gas to L-gas?)

I think that's the most important question here: what kind of losses are taking place in the energy_treatment_natural_gasnode and should we model them?

[AlexanderWirtz]

I think that's the most important question here: what kind of losses are taking place in the energy_treatment_natural_gasnode and should we model them?

The treatment of raw natural gas is de-sulphurization, drying etc. So purifying in a way, so it can be fed into the gas network. It costs some energy to do so. The question of whether this is necessary is one we could take up with someone from Gasunie, perhaps.

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