stefanpauliuk
commented
2 years ago Hi @CarrerF, during the database development, we started with data on the total GHG impact of primary material production, and these are stored in 4_PE_ProcessExtensions See the log sheet of this parameter file for further details.
We had very little capacity to disentangle process from energy carrier emissions, and only managed to do so for a few metals and energy carriers, like H2-based steel production. Hence, 4_PE_ProcessExtensions and 4_PE_ProcessEnergyIntensity need to be seen together! Together, and via the energy demand from 4_PE_ProcessEnergyIntensity, they give the full GHG picture. The intermediate result SysVar_EnergyDemand_PrimaryProd is incomplete, that is true!
Disentangling all this will require a larger effort, with process models of material production to separate all the energy carriers from process emissions... Ideally, we can directly use other peoples research to do so in the future...
CarrerF
The dataset refers to the process energy demand of primary material production. In the case of steel, it is said to be modelled as constant until 2030 and then linear decline/decrease from current values. However, values are 0 until 2030 and then they increase. How can one compute the energy demand for primary production?
Update: the documentation states that the parameter is not used in RECC 2.4. However, while it is true that emissions are computed via ProcessExtensions, SysVar_EnergyDemand_PrimaryProd still depends on the parameter, and hence SysVar_TotalEnergyDemand and EnergyCons_total do as well. In the end, EnergyCons_total is reported in the results sheet, even though the energy intensity for primary production is incomplete.