Release Notes

Version 0.7.6 (2025-02-10)

Adjusted to EnergyModelsBase v0.9.0:
- Increased version nubmer for EMB.
- Model worked without adjustments.
- Adjustments only required for simple understanding of changes.

Included changes for CO2Storage to not require the definition of variables that are not used.
Included check changes from EnergyModelsBase.
Fixed minor errors in the documentation.

Minor changes to the documentation and docstrings.
Minor rewriting of constraints and fixing variables.
Adjusted to EnergyModelsBase v0.8.1:
- Use of the function scale_op_sp.
- Rework based on the introduction of :stor_level_Δ_sp in EnergyModelsBase as sparse variable.

Dependency increase for EnergyModelsBase as the changes do not directly affect EnergyModelsCO2.
Adjustment of the interlinks to the changes in the structure of EnergyModelsBase.
Fixed additional errors in the documentation.
Added page for the examples in the documentation.

Removed requirement for specifying the co2_proxy resource as output of the NetworkNodeWithRetrofit node and input to the CCSRetroFit node through addding methods for EMB.outputs and EMB.inputs. This implies that both are no longer specified within the input and output dictionary, and all functionality directly accessing the fields may result in errors.
Adjusted documentation to deploy to the proper site.
Removed pre-release statements.

Added support for CaptureProcessEmissions for CCSRetroFit nodes.
Changed the name of CaptureNone to CaptureFlueGas while incorporating a constructor for the old version.
Changed the name of NetworkCCSRetrofit to RefNetworkNodeRetrofit while incorporating a constructor for the old version. The aim is to follow more closely the names in EnergyModelsBase.
Introduced supertype NetworkNodeWithRetrofit to allow the application of the functionality in other packages.

Upper limit of the capacity of CO₂ storage nodes:
- It was in previous analyses never active, but may result in errors, if the duration of strategic periods is large.
- It can result in overestimating the storage potential as the last strategic period in which the storage is filled is not fully included in the bound.
Maximum CO₂ capture when using CaptureEnergyEmissions or CaptureProcessEnergyEmissions:
- The maximum capture limit was to tight as it did not include potential additional capture fom energy related or process emissions within the node.
- Both were included now.

Restructured the examples:
- Added the examples to the testing routine.
- Added an exasmple for CO₂ capture retrofit.
- Extended extensively the comments of the examples to improve understandability.
Incorporated a new structure for the documentation, including usage of @docs blocks and a structured approach.
Provided separate pages for all introduced nodal types.
Added a "how to contribute" page.

Adjustment to changes in EMB v0.7.0 introducing the concept of StorageBehavior and AbstractStorageParameters.
- CO2Storage nodes should only use AccumulatingStrategic, an internal subtype.
- CO2Storage nodes have now the potential for both charge and level OPEX, also the latter seems irrelevant
Inclusion of CO2Storage nodes as potential CO₂ emitter.

Adjustment to changes in EMB v0.6.4 allowing for allowing time dependent process emissions.

Update the methods constraints_level_aux and constraints_level to match the signature updates for these methods in EnergyModelsBase. This includes renaming constraints_level to constraints_level_sp.

Adjusted to changes in EnergyModelsBase v0.6.
Included handling of representative periods for CO2Storage.
Added a new idea for reducing repetitions in Storage nodes. This implementation can be, if considered robust, included for all Storage nodes.
Added a new node CO2Source <: Source. The recent changes of EnergyModelsBase required that a potential CO₂ source could no longer be modelled using the RefSource node.

Both nodes have to be used together for proper analysis.
NetworkCCSRetrofit <: NetworkNode is a node to which CCS can be implemented as a retrofit.
CCSRetroFit <: NetworkNode is a node where the investments lead to the potential of utilizing CO2 capture. If the node has no capacity, then all CO₂ is emitted.

Switched the time structure representation to TimeStruct.
TimeStruct is implemented with only the basis features that were available in TimesStructures. This implies that neither operational nor strategic uncertainty is included in the model.

Adjustment to changes in EnergyModelsBase v0.3.3 related to the calls for the constraint functions.

Implement a node CO2Storage <: Storage. The storage level will accumulate over the strategic periods.