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Posts posted by nakomaru

  1. 9 hours ago, avc15 said:

    I haven't seen anyone account for the amount of heat that leaks across the building (from steam chamber to outside

    Some things:

    • The turbine is a 5x4 building for the purposes of heat exchange, including the 5 tiles it overlaps.
    • The turbine is buried inside of the tiles. So it exchanges heat fairly quickly with them, and should cool them to slightly above whatever your turbine temperature is. (Ceramic or worse.)
    • The turbine does not transfer heat with the steam.
    • The steam will transfer with any insulated tiles. (Ceramic or worse.)
    • Other sources of heat loss can be designed around, so I do not consider them.

    Therefore, I consider the following common cases.


    This should be a fairly reasonable time sample and ΔT to ignore non linearities of heat transfer. The heat lost through imperfect insulation is:

    • 814 DTU/s (tiles, turbine) (room temperature ceramic vs 2kg steam room @ 200C)
    • 542 DTU/s (tiles, turbine) (room temperature ceramic vs 200kg steam room @200C)

    I don't understand why the 2kg steam loses. It was my understanding that higher heat capacity tiles will tend to transfer more heat, not less. Either way, this is a tiny baby amount of heat loss that is 0.1% the capacity of a tuner on water. For insulated insulation, the loss is of course 0 watts.

  2. There are a lot of simplifications made for the sake of gameplay and performance. The issue you seem to be having is that ONI uses ONI physics rather than ordinary physics. Instead of density, pressure, gravity, the ideal gas law, mixtures, etc, we have single tile physics and sorting by molar mass and phase.

    Sorting and swapping by molar mass and phase is straightforward, and also easy for the player to predict, once learned.

    • Like 1

  3. You can't really exploit this very well, since like 99% of the gained heat is lost again when condensing to liquid and any heating beyond vaporization is net zero. You gain a little bit each time you cycle phases due to the difference.

    The best you could push this would be by using the 1/10th conduit rule and bringing the temp down do 150C before solidifying. But still, probably not worth it.

  4. 1 hour ago, Lancar said:

    I still don't get it.

    Isn't the goal of the heat exchanger to make the incoming oil and outgoing petrol the same temperature? Why not achieve this faster with a shorter & more conductive exchanger?

    A simple exchanger with high conductivity everywhere would take e.g. 0C and 100C water inputs and make both 50C outputs.

    With counterflow you can do much better by only letting the hot hot stuff touch the hot cold stuff, etc. Taking the temp at a few locations of transfer might look like this.

    • 100C hot stuff with 99C cold stuff.
    • 60C hot stuff with 59C cold stuff.
    • 1C hot stuff with 0C cold stuff.

    When you add metal tiles and tempshifts, generally you are adding these types of heat transfers to the system:

    • 65C cold stuff with 70C cold stuff
    • 45C hot stuff with 50C hot stuff.

    These only reduce the efficiency. You want as much of the top stuff and as little of the bottom stuff.

    • Like 1

  5. 2 hours ago, Ketmol said:

    What people do here, and faster than lightning, is pointing out flaws in your design and what you can do better. I choose to view that as people being helpful

    We do that too. That's a different, good thing.

    It was once worse, but still seems to happen. You can watch us self immolate if they make a big balance change.

    • Haha 1