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v0.2.0 - Initial Release of flixOpt
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@FBumann FBumann released this 02 Jul 14:49
· 1035 commits to main since this release
v0.2.0
61a71a4

Initial Release of flixOpt

After being in development, this marks the first official release of flixOpt.
flixOpt and all its dependencies (including a solver) are now easily installable via pip (see README.md)
This release is a crucial part in preparation of a major new release with breaking changes, like new class names, module names and more.

API Changes

  • HiGHS-Solver API established - Open Source and faster than other open source solvers - https://highs.dev/#docs
  • Tutorial as Python Notebook added
  • Time-stamp labeling in .csv export of results enabled

New features

  • Limits per Time step for effects introduced
  • New Concept "exists" introduced.
    • This Attribute allows for multi-period investments.
    • Sets The upper limit for TS_Variables to 0 when Component or Flow does not exist.
    • The existence of flows is limited by the existence of the Component it is assigned to.
    • Vice versa, it's possible that a Flow does not yet exist while its component does (for ex. multiple grid connections).
    • The concept is introduced but, some aspects are not yet perfectly implemented.
  • str() and repr() methods added for major classes, which enables the printing of a system configuration for documentation and debugging purposes
  • Type Hints are added, improving readability and ease of use
  • New Module flixCompsExperimental.py with a experimental and early state implementation of a CHP-Plant with variable rate between heat and power

Bug fixes

  • Fixed onHoursSum_max & min in Flows
  • Fixed Segmented Modeling
  • Fixed max_rel in combination with no Investment in class Storage

Other changes

  • Proper tests are introduced for better and safer future developments

Known issues

  • onHoursSum_max & min are not yet working in Components (raises Error). Use Flow instead.
  • exists is still in early state:
    • on single flows does not work with segmentsOfFlows. use exists in Component
    • does not affect all properties that might be expected:
      • cFlow: on_valuesBeforeBegin, valuesBeforeBegin are still before the begin of the model, not at the time step before existence
      • cStorage: chargeState0_inFlowHours, charge_state_end_min, charge_state_end_max and fracLossPerHour are not affected by "exists". Only the available capacity is limited to 0

Contributors

Felix Bumann
Felix Panitz
Peter Stange

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