Open fwitte opened 2 years ago
I had another idea for the H2 feedin limitation, I hope it's fine to add this here:
There are fixed gas loads per node (industry and rural heat buildings without a heat pump), so we already know in advance that at least this amount of CH4 has to be available at each node and time step. We could assume that the H2 feedin at each node and snapshot can't be more than X% (e.g. 15% vol.) than the fixed gas load. That way we ensure, that each fixed CH4 load can be supplied by maximum x% of H2. It would be a conservative assumption, because there are actually also other gas demands which are part of the optimization (CHP, OCGT) and not considered in this limitation, but the resulting share would be always smaller than the selected limit. And they are most likely smaller that the rural heat loads.
To model this, we can set a p_max_pu
time series for the H2 feedin links which are calculated based on the CH4 loads. This could be easily done in eTraGo and might not effect the calculation time that much, we also use that for modelling other technologies.
This issue will be updated with different possible solutions. The final decision should be aimed for the end of January.
Issue
The H2 feedin into the CH4 grid should be restricted to a maximum share in the eGon2035 scenario.
Possible Solutions
Solution 1
Parallel "virtual" CH4/H2 mixture with fixed mass fractions pipeline network:
Open questions:
Benefits
Downsides
Solution 2
Restrict the feedin of H2 relative to the production and feedin of CH4 at each CH4 bus.
Benefits
Solution 3
Restrict the feedin of H2 relative to the total production and feedin of CH4 in the systems.
Benefits
Downsides
Implications
Data model
Depending on the method that will be implemented to model H2 feedin into the CH4 pipeline grid, additional data are required for the optimization.
Solution 1
There are a lot of modifications to make based on the current state of the data exported from egon-data. However, all modifications can be made in eTraGo and do not require the changes to be made in the egon-data process.
Solution 2
No data model adjustments required.
Optimization model
Depending on the method that will be implemented to model H2 feedin into the CH4 pipeline grid, additional constraints are required for the optimization.
Solution 1
Solution 2
Decisions