Hi! :)

I absolutely love the idea of this mod, but some aspects of it left me a bit confused and so I looked into your code
and changed a few things. If your source would be on GitHub I'd have made a pull request there.
You can view my fork here: https://github.com/desto-git/factorio-steamworks/

I put each change in a separate commit so you can see what exactly I edited to make it happen.

Here's the changelog:

Version: 1.0.0
Date: 2020-08-29
Features:
    - Labs have steam connections on each side (because they cannot be rotated)
Balancing:
    - Use the same amount of steam as would be needed to generate the electricity
Bugfixes:
    - Let machines emit pollution
    - Show steam connections in ALT mode
    - Remove debug logs
Changes:
    - Update to Factorio 1.0
    - Remove Mini Storage Tank
    - Don't enable some Circuit network items automatically
    - Add German translation

Let me explain my reasoning for each of these changes.

Labs

After digging around for a while I'm pretty sure that labs just don't support rotation. Despite inheriting the
rotated_sound property from Prototype/Entity, it has no rotation logic.
https://wiki.factorio.com/Prototype/Lab

Prototype/CraftingMachine has an explicit mention for when the entity can be rotated in the introductory text,
but a lab is not a crafting machine.
https://wiki.factorio.com/Prototype/CraftingMachine

Re-balance steam <-> electricity

I see that you notably changed the heat_capacity to be 10x higher, and I assume this was so that the machines
would work on their regular speed?

And to counter-balance this the energy_source.fluid_usage_per_tick property of the affected entities is adjusted,
but from what I experienced the values are hugely off.
Machines would consume only a 10th of steam compared to the vanilla way of converting it to electricity first.

After fiddling around for a while I found that setting energy_source.maximum_temperature = 165 instead of calculating
an appropriate value for fluid_usage_per_tick would work as I initially expected.
For this, the follwing must be set (or omitted, these are the default values anyway)

-- scale_fluid_usage = false (default)
-- fluid_usage_per_tick = nil (default)

The machine's speed and producation are unaltered, and it consumes the same amount of steam a steam engine would need
to create the electricity for the machine before.

Pollution

I think you just forgot to add the emissions_per_minute back into the energy_source.
The vast majority of pollution is created by these machines, and without it our factories barely touch the planet's ecosystem in the process.

ALT mode

I also think you just commented that out by accident? Seeing that it's visible on the thumbnail.

-- production_type = "input-output",

Logs

I noticed when launching factorio-headless on my server that this mod logs a bunch of debugging info on startup.
These kinds of logs should not appear in a production build.

Remove Mini Storage Tank

I didn't get the point of it. It stores the same amount of fluid as a regular pipe.
Maybe this was relevant when fluids were still wobbly in pipes? Or when fluid mixing was still possible?

I added a migration step to replace it with a regular pipe.

Circuit network items

Well, erm, why were they enabled in the first place? They have nothing to do with the mechanic of the mod.

Translations

I removed the renaming of the stone and steel furnaces. They don't consume steam, so no need to suggest that.

Version bump to 1.0.0

Rebalancing will have a huge impact on power usage for existing users of the mod.
It will increase by about 10 times from 0.3.0.

I'd also argue that this mod is in a stable state, at least from what I checked.

You are welcome!

Labs: In 0.16 or 0.17 the lab with fluid energy source make the hard crash of the game, it was the only one solution: do not touch them at all.

Water/Steam heat capacity: At the start I've tested that vanilla balance needs too much water. Now I know that the fluid consumption was not good defined. The mini-storage-tank was here for consumption balancing too. And circuits from start of the game for it.

Pollution: The idea was that the steam is pretty clean, but the burning boiler make all pollutions.

Thanks! :D

Labs: In 0.16 or 0.17 the lab with fluid energy source make the hard crash of the game, it was the only one solution: do not touch them at all.

But the latest version of the mod is for the latest version of Factorio. I don't think this sort of backwards compatibility is needed, as it cannot run in older Factorio releases.

I did not experience any crashes while working with labs. Deconstructing, trying to rotate, running out of steam, pulling out ingredients, all in multiplayer. it all worked just fine.

Water/Steam heat capacity: At the start I've tested that vanilla balance needs too much water. Now I know that the fluid consumption was not good defined. The mini-storage-tank was here for consumption balancing too. And circuits from start of the game for it.

Circuits can be researched rather early, along with the regular storage tank. I think having to manually check the steam flow at the start fits pretty well with the balance of the base game.

Pollution: The idea was that the steam is pretty clean, but the burning boiler make all pollutions.

The same could be true for electricity. I think this could be a separate mod.

So is there anything you want to see changed, or can I publish the zip as is available on the GitHub page? :)

Please publish your version, it sounds good for me.

Grüße

Please fix the changelog, it has wrong definition.

Please fix the changelog, it has wrong definition.

What do you mean? It displays fine on the mod portal, as well as in the game.

Now it's ok, but I am sure that I saw the wrong changelog before post it.

I didn't change anything after creating this topic. Whatever the case may be, thanks a bunch for letting me participate! :)

You've uploaded the new version and this new version has a good changelog file. So, fixed :)