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Oxylite outgassing at high pressure


SpaceDude
  • Branch: Live Branch Version: Windows Pending

I use Oxylite in Storage bins to supply Oxygen in rockets.  This has sometimes resulted in high pressure in the rocket.  Seems worse with most recent QoL update - many of my rockets are at 70kg/square or above.  Hovering over the bin, I can see Oxygen at 70kg, and the Oxylite amount ticking down.  

Is this because the bin is too close to the vacuum outside the rocket?  Haven't had a chance to fully investigate.


Steps to Reproduce

Store oxylite in a bin in a rocket.




User Feedback


last update fixed the "offgassing deletes tiny amounts of co2" bug you used to keep that rocket pressurized and delete the co2.

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I noticed that.  But I still don't think this is working as expected.  I use CO2 skimmers to remove CO2.  Oxylite is not meant to sublimate if pressure is > 1800g.  So my rockets should not be overpressure.

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If you upload your save file I can take a look. This situation is more likely to happen now that the tiny amounts of CO2 aren't deleted as frequently as before.

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Francis John's recent video (timestamp 6:34) shows the issue as well. Whenever a tiny packet of CO2 drifts past oxylite either on the ground or in a storage bin, it off-gasses extremely rapidly, ejecting a massive amount of oxygen into the surrounding tiles until the co2 packet moves on.

Previously, it'd delete the packet of co2, so the oxygen burst wouldn't be significant.

While I agree that it deleting the co2 was an exploitable problem, it feels like the amount of oxylite released should probably asymptote to some maximum level regardless of mass, instead of just scaling linearly. Although I have no idea how you'd do that with the absurd 500t of the stuff that Francis John had in their situation, since that would have been split across dozens of stacks. But a storage bin of 20t of oxylite probably shouldn't start popping eardrums just because occasional co2 packets drift past it.

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Ah, so basically Oxylite is now outgassing if ANY low pressure gas is present.  

Presumably Oxylite outgasses into an existing O2 square if available?  So would it be better to check the target pressure to decide if it should outgas?

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There's a change currently being tested on the public_testing branch.

Quote
  • Sublimating elements will consider neighboring tiles for overpressure to reduce the occurrence of runaway off gassing.

 

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This configuration is still rather unstable (it'll stop subliminating if the second tile reaches the overpressure limit, but because the water droplet repeatedly gets teleported it won't reach that point easily)  

 

image.png.b9669a446a91bfdca28ef3b20efb18fc.png

 

Note making it 2 tiles high does stop sublimination properly. There's a few other configurations that still don't work well even with the new sublimination logicimage.png.5cabf9de9d67b52f94bc4ac450e7de4e.png

 

EDIT: All the bad configurations involve liquids (similar to infinite gas storage with vents). New behavior looks great with gases!

Edited by Tigin

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