Using volcano rock heat

[Smithe37]

Sooo i'm having trouble with heat trapped in volcanic rocks. The volcano erupt and the heat spreads well for use by other things when it's lava but soon after it solidifies to igneous rock and the heat won't move from them resulting in 200 degree tempshift plates and 20T of 1200 degree igneous rock debris. Any good way to move the from them into the tempshift plates?
I'm trying to move the heat for use in steam generators, heating crude oil for nat gas/petroleum etc.

[Kiros]

Might need to change your setup or magma delivery system if the magma is cooling into dropped debris instead of solid block tiles. Either that or maybe pump some hydrogen in there?

Or maybe somehow build tiles with those specific rocks, where you need the heat to be.

[Kabrute]

i would dump oil on the rocks till it quits turning yellow.....

[avc15]

unfortunately "debris" doesn't seem to interact with background buildings (tempshift plates), it will only seem to transfer heat with either the storage it's sitting inside, the block it's resting on, or the fluid it's immersed in (gas or liquid).

Again unfortunately, even if your debris is sitting on top of a tungsten block, you don't get a whole hell of a lot of heat transfer with a tempshift plate touching your tungsten tile, because the heat has exactly ONE path for conduction.

From my experience to get the heat to transfer you need to either:

(1) get your rock to solidify into whole blocks (not debris) on top of the tempshift plates, do this by cooling whole blocks of magma until they solidify (instead of a little bit at a time)

 or (2) immerse your debris in fluid (gas OR liquid), then you have many heat transfer paths between the debris and your temp plates.

[Smithe37]

25 minutes ago, avc15 said:

unfortunately "debris" doesn't seem to interact with background buildings (tempshift plates), it will only seem to transfer heat with either the storage it's sitting inside, the block it's resting on, or the fluid it's immersed in (gas or liquid).

Again unfortunately, even if your debris is sitting on top of a tungsten block, you don't get a whole hell of a lot of heat transfer with a tempshift plate touching your tungsten tile, because the heat has exactly ONE path for conduction.

From my experience to get the heat to transfer you need to either:

(1) get your rock to solidify into whole blocks (not debris) on top of the tempshift plates, do this by cooling whole blocks of magma until they solidify (instead of a little bit at a time)

 or (2) immerse your debris in fluid (gas OR liquid), then you have many heat transfer paths between the debris and your temp plates.

Would filling the room with over pressurised hydrogen work very well? Say, compared to a liquid. The whole point of the system I'm trying to build is to have some control over when I want to Produce nat gas or petrol without using the refinery (which as I understand has quite a lot of loss in terms of raw material and dupe time).
I plan on then using the excess heat to power steam generators.
Otherwise I might just give up on trying to build a system for petrol/nat gas and just go for steam power. (unless I was to just go straight for nat gas only which I might do via dumping the oil straight onto the volcano)

[avc15]

perhaps. I'm experimenting with something similar (but using very hot iron to superheat steam for a steam turbine and make a supply of iron at manageable temps available in my base)

I think steam and phosphorus gas have better thermal properties for this purpose but it will also be a real chore to clean up if you get any into your magma layer. (vacuum is usually preferable for heat containments, very hard to purge a steam filled magma enclosure to vacuum)

[Smithe37]

24 minutes ago, avc15 said:

perhaps. I'm experimenting with something similar (but using very hot iron to superheat steam for a steam turbine and make a supply of iron at manageable temps available in my base)

I think steam and phosphorus gas have better thermal properties for this purpose but it will also be a real chore to clean up if you get any into your magma layer. (vacuum is usually preferable for heat containments, very hard to purge a steam filled magma enclosure to vacuum)

Don't think that's true. The most important thing would be thermal conductivity and density I think. The more particles surrounding the object, the more that heat is transferred, the higher the conductivity the fast heat moves between the objects.  I don't think specific heat matters as that just tells you how much heat the object can absorb per degree change (in fact a lower specific heat is probably more useful as the gas will act less as a heat sink).
Therefore I think that the best gas is hydrogen or steam (though steams  heat capacity is twice as high), as they have the highest thermal conductivity

[PhailRaptor]

2 hours ago, Smithe37 said:

Don't think that's true. The most important thing would be thermal conductivity and density I think. The more particles surrounding the object, the more that heat is transferred, the higher the conductivity the fast heat moves between the objects.  I don't think specific heat matters as that just tells you how much heat the object can absorb per degree change (in fact a lower specific heat is probably more useful as the gas will act less as a heat sink).
Therefore I think that the best gas is hydrogen or steam (though steams  heat capacity is twice as high), as they have the highest thermal conductivity

It would depend on how much "thermal inertia" you want the system to have.  The higher the Capacity, the more heat needs to be present (or absent) for a temperature change.  So when the source is removed, the higher the Capacity of the components in the system, the longer it will take for the system to fully shut down.

[JonnyMonroe]

Most things in the game only thermally interact with the atmosphere of the tile they are on. This is why liquid stored in a building won't heat the building up if it's in a vacuum environment. The heat is trying to go liquid > atmosphere > building and there is no atmosphere.

If you want to draw heat out of debris you need to use a thermally conductive atmosphere. For gasses at volcanic temperatures this will probably be steam but since you are limited to the thermal transfer of the debris itself you can get the same result with hydrogen (the highest transfer rate of volcanic products is igneous rock at 1w/m/k, which is lower than that of steam or hydrogen).

[avc15]

4 hours ago, PhailRaptor said:

It would depend on how much "thermal inertia" you want the system to have.

@smithe37 should be right, in this case you want the highest thermal conductivity, and low heat capacity is a bonus. Because, the system is designed to cool something down from very hot temps.