Change carbon content of energy carrier for different years

[demar]

Hi, 

I am trying to change the carbon content of an energy carrier (electricity in particular) over the different model years, but it is not working. 

Any hints how I can do this?

Thanks

[Antti-L]

Your problem appears to be a VEDA issue, and not TIMES.
I believe the VEDA ~COMEMI table generates TIMES VDA_EMCB attribute instances, but it is possible that VEDA does not support year indexes in COMEMI tables.

But the TIMES VDA_EMCB parameter does have a year index:
   VDA_EMCB(REG,ALLYEAR,COM,COM)  –  Combustion emission parameter

So, it should be easy to define year-specific values for it in TFM_INS / TFM_DINS tables. The first commodity is the source of emissions, and should be specified in CSet_CN. The second commodity is the emission commodity, and should be specified in Other_Indexes.  That should give you all the info for using it.  However, should you prefer to define it in a FI_T table, I think that would be equally easy. VDA_EMCB is automatically inter-/extrapolated by TIMES, and so no IE option should be needed.

[demar]

Your problem appears to be a VEDA issue, and not TIMES.
I believe the VEDA ~COMEMI table generates TIMES VDA_EMCB attribute instances, but it is possible that VEDA does not support year indexes in COMEMI tables.

But the TIMES VDA_EMCB parameter does have a year index:
   VDA_EMCB(REG,ALLYEAR,COM,COM)  –  Combustion emission parameter

So, it should be easy to define year-specific values for it in TFM_INS / TFM_DINS tables. The first commodity is the source of emissions, and should be specified in CSet_CN. The second commodity is the emission commodity, and should be specified in Other_Indexes.  That should give you all the info for using it.  However, should you prefer to define it in a FI_T table, I think that would be equally easy.  VDA_EMCB is automatically inter-/extrapolated by TIMES, and so no IE option should be needed.

Do you mean with creating a scenario?

I tried, but it seems that the only value is assumed for the carbon content is the one I set in VT file (not specifying the year)

[AKanudia]

There seems to be some confusion between emission coefficients and emission bounds.

COMEMI is supported only for backward compatibility and it does not support the year index. VDA_EMCB is the recommended approach, as Antti suggested.

HOWEVER, if your model has the electricity sector too, and it is bounded as shown in your INS table, then I am not sure what you are trying to achieve by declaring the same bounds as emission coefficients.

[Antti-L]

Dear demar, as Amit pointed out, I meant to use VDA_EMCB, not COM_BNDNET.

For an example, see the following:
https://forum.kanors-emr.org/showthread.php?tid=482&pid=6652#pid6652

I hope you can see the picture of the table there (~FI_T: VDA_EMCB)?

But, if your model has the electricity sector too, then aggregating ELCCO2 into TRACO2 (like you had in your picture) might be prone to a double counting error.

[demar]

Dear Akanudia and Antti-L

Thank you for your suggestions.

I am modeling the transport sector as a standalone system and therefore I want to change the emission coefficient over the time.

I cannot see the table of the old post, unfortunately. But would it work with just changing my ~COMEMI to ~FI_T? But do I keep then my ~COMEAGG?

Thanks

t

[Antti-L]

Ok, I attach that picture (~FI_T: VDA_EMCB) here, hope you see it now: