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About Derringer

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  1. This might make some sense with respect to interface phase change, since unlike in whole-cell phase change there is some viable notion of pressure at the interface. Where it might run aground is the one element per cell rule. Interface phase change is quantised to 5 kg increments, so if for example 5 kg of water were to boil off under low pressure at 90 °C, it would turn to a single cell of 5 kg steam at 90 °C which would in all probability be sufficiently compressed to immediately condense again under whole-cell phase change. Whole-cell phase change might become more problematic in general: with nowhere for steam to escape to, you'd essentially have to heat a fully enclosed tile of water enough to overcome the boiling point at its internal pressure (~1 t). Latent heat of phase change is another can of worms. If that was applied, you'd be able to cool water by opening a steam-stack to space, and the steam turbine would have to contend with the latent heat released by condensing steam into water in addition to the sensible heat of the steam.
  2. This sounds like the sort of thing that ought to somehow be unlockable in late game, possibly requiring blueprints recovered from the broken world or exotic research data brought back from the Temporal Tear.
  3. Industrial diamond

    Maybe use drill bits to buff geysers?
  4. For that matter, there really ought to be a way in general to control work errands and supply errands independently, for various values of work errand - tune up a generator, apply micronutrient fertiliser, build something after the materials are delivered... As it is now, it's impossible to let a dupe perform an task without also allowing them to haul material for it at the same priority.
  5. Setting up an aqua-tuner to delete heat is sillier still, since it, y'know, doesn't. One requires delivery of phosphorite, the other requires electricity and a place to dump the removed heat. Either one can be set up to run without dupe access, if that's what a 'closed build' means.
  6. Serialization can easily become a CPU time hog in any application, so none of this exactly surprises me. I've gone to the trouble of building code generators that reflect over everything serializable and generate fast-path save and load code just to shave precious milliseconds off of periodic saves.
  7. The active positive plate material of a lead-acid battery is lead dioxide, while the active negative plate material is metallic lead; the electrolyte is sulphuric acid, produced from sulphur, water and oxygen. If we don't want to get into adding elements and either new buildings or non-space molecular forge recipes, I'd suggest constructing the battery primarily of plastic, with lead, sulphur, and oxylite as additional materials, then generate an errand to load the device with a starting amount of water once it's constructed. In essence, the device is a reverse electrolyzer. Hydrogen from the sulphuric acid combines with oxygen from the lead dioxide, forming water, while the sulphate component of the acid attaches to the lead on the plates. Electricity is produced in the process, driven mainly by the energy released in water formation. Charging the battery separates produced water into hydrogen and oxygen, dislodging sulphate from the lead so it can recombine with hydrogen and replacing oxygen onto the positive plate. Applying more energy than the battery can store results in it acting like a conventional electrolyzer: consuming stored water to release hot oxygen and hydrogen gas, screwing up gas management, adding excess heat, and possibly putting it out of service until the water is topped up. If you're looking for a primary battery/fuel cell type application and want to handwave as much of the chemistry as reasonably possible, one new element - lead sulphate (industrial ingredient, or possibly metal ore but I don't recommend it) - would be required. The device would consume lead, sulphur and oxylite, and produce lead sulphate and a small amount of surplus water. The lead sulphate could then be reduced back to lead at a metal refinery.
  8. Use the petrol from your cooling loop to drive a steam turbine instead, so you get power without deleting the petrol.
  9. I think you found the real use case. I was just speculating.
  10. It almost seems like they tried to hold onto enough information to be able to replay a save from the beginning. The game engine is far too nondeterministic to use the much smaller player command logs for replay.
  11. The most bulletproof bypass I've been able to come up with uses a liquid valve (not a shutoff) beyond the aquatuner and directly below the steam room, and automation controls the aquatuner. If the aquatuner stops for any reason, including loss of power, flow continues circulating through the bypass. The actively-cooled and bypass pipes have precisely the same length, so there should never be stuck packets or inter-packet gaps. This also appears to be insensitive to whether the aquatuner is flipped left to right, and fits neatly into an arrangement of 4 tile high rooms. I've added a coolant reservoir here to stabilise the output temperature, with the extent of output temperature swing largely determined by the length of pipe from the aquatuner output to the reservoir input. It has the added benefit of allowing the pipes to be drawn empty by using the door to disable reservoir output. If a reservoir is undesirable, the thermo sensor can be placed on the exposed pipe elbow in the steam room for near-immediate control of the aquatuner. Aquatuner is steel, pipes inside steam chamber are ceramic, all other insulated pipes and tiles are igneous rock.
  12. An auto-sweeper can do it if you provide a place for it to put the ice (conveyor loader, storage bin, etc.)
  13. I believe it doesn't have the frozen biome at all. You can fetch sleet wheat from space; there should be a frozen destination at 40 Mm.
  14. Why use jet suits?

    IME the most annoying thing about jet suits (besides path heck) is that they spew CO₂ at 200 °C, which has a tendency to break plastic ladders.
  15. If I read the wiki correctly, assuming a full packet of water-based coolant the aquatuner extracts 585060 DTU for 1200 J of electricity, and the steam turbine returns 1 J for each 1032.5 DTU put into it. This leaves an average deficit of ~633.4 J per packet cooled to be made up by external generation. Getting oil is helpful beyond just plastic. You don't even have to faff with steel if you build the aquatuner out of gold amalgam, pour a layer of oil on the floor to move heat out of the aquatuner, and use tempshift plates to move heat from the oil to the steam. Direct transfer to the steam isn't fast enough.