Cooling tower first model

[phelimb-met]

Goal

Describe the big picture of your changes here (one sentence).

If it fixes an issue, mention the issue using closing key words (how to do that ?), or in development section of your PR's information.

Type of change

• [ ] Bugfix
• [ ] New feature
• [ ] Refactoring change
• [ ] Release & Version Update (don't forget to change the version number in package.mo)

Will it break anything in previous models ?

• [ ] Breaking change (If yes, make sure to point it out in the changelog)
• [ ] Non-Breaking change

Checklist

• [ ] I have added the appropriate tags, reviewers, projects (and detailed the size and priority of my PR) and linked issues to this PR
• [ ] I have performed a self-review of my own code
• [ ] I have checked that all existing tests pass.
• [ ] I have added/updated tests that prove my development works and does not break anything.
• [ ] I have made corresponding changes or additions to the documentation (in Notion documentation)
• [ ] I have added corresponding entries to the Changelog
• [ ] I have checked for conflicts with target branch, and merged/rebased in consequence

You can also fill these out after creating the PR, but make sure to check them all before submitting your PR for review.