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+--- Thread: Change carbon content of energy carrier for different years (/thread-247.html)
Change carbon content of energy carrier for different years - demar - 08-12-2024
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
RE: Change carbon content of energy carrier for different years - Antti-L - 08-12-2024
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.
RE: Change carbon content of energy carrier for different years - demar - 08-12-2024
(08-12-2024, 12:40 AM)Antti-L Wrote: 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)
RE: Change carbon content of energy carrier for different years - AKanudia - 09-12-2024
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.
RE: Change carbon content of energy carrier for different years - Antti-L - 09-12-2024
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.
RE: Change carbon content of energy carrier for different years - demar - 09-12-2024
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
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RE: Change carbon content of energy carrier for different years - Antti-L - 09-12-2024
Ok, I attach that picture (~FI_T: VDA_EMCB) here, hope you see it now: [attachment=189]