Boxman_90 Posted December 19, 2018 Share Posted December 19, 2018 I was working on Mantis V1.2, which I'm adapting to also take hot coolants out of the refinery to convert that heat back into power (this should - even with 10 ports open - be massively power-positive for the Steel recipe and even more so with experienced dupes). For this I wanted to temperature-sort petroleum coming out of the refinery so that only >500C petroleum enters Mantis while re-routing the rest, however I hit a snag when I noticed Liquid Shutoffs have overheat temperatures as well - for a max of 275C. After some fiddling, I have managed to build an indirect liquid shutoff, that works exactly like a normal liquid shutoff except never has the hot liquid run through any actual shutoffs. The resulting valve thus never overheats. After building it I did a quick search on the forums but haven't found anything of the sort, so I decided to share this little design . Screens first, explanation below, short vid thereafter. What it does: Switches liquids of all temperatures with standard 75C liquid shutoff Useful for sorting hot refinery coolants, diverting molten glass, or any other piped liquid >275C. Screens: Setup itself: Plumbing overlay: Automation overlay: How it works What you need to make this work is a perpetual water-loop, which is easily built with a liquid reservoir. Fill it with some cold water (enough to allow your loop to expand for more valves later) and you're good to go. Basically it works by two liquid shutoffs diverting the flow of cool water through one of two pathways. In 'blocking' mode, the cool water is sent into the 'switch-loop', where it blocks the hot petroleum that tries to come in through the liquid bridge; after passing the bridge, it is scavenged back into the perpetual loop with another active shutoff. In 'bypass' mode, the water flow is diverted allowing the petroleum to enter the switch-loop. A temperature-sensor set to activate <100C (or any other temp >water-temp) makes sure the second shutoff scavenges the last cool water packet out of the switch-loop, after which it diverts the petroleum to the output by entering the 'closed' state. Switching back again allows cool water in, blocking petroleum, and scavenging only the cool water packets back into the perpetual loop after the last packet of hot petroleum is diverted through. The piping for both modes ('blocking' and 'bypass') has been made equal-length to ensure the cool water-stream remains uninterrupted, which allows multiple valves to be installed on the same perpetual loop (any 'empty' pockets in the stream will make the valve leak one packet of hot liquid). You could have a single perpetual loop running through all the parts of your base where you need to switch hot liquid. Afaik, there is no (ok ok, minimal) temperature cross-talk between the two liquids by using insulated piping. Quick vid switching the valve a few times with 510C-ish petroleum: Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/ Share on other sites More sharing options...
hackcasual Posted December 20, 2018 Share Posted December 20, 2018 As far as I know, liquid shutoffs just teleport liquid from input to output when enabled. If you look at my regolith melter here: I'm pumping 1300C liquid glass through it. You might run into an issue if you let the output backup, or insulation leakage heats up the medium its in, but otherwise, if they generate any heat themselves, it hasn't caused a problem in over 50 cycles. Edit: Also it's worth looking into regolith melting for steam generation, as regolith has 1/5th the SHC of magma, meaning as soon as a piece of regolith melt, you've multiplied the heat in it by 5. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1134276 Share on other sites More sharing options...
Boxman_90 Posted December 20, 2018 Author Share Posted December 20, 2018 I'll be damned - all this effort only for the shutoff turning out to be glitched. It seems it has indeed zero thermal contact with the liquid it's switching. Curious. It didn't even cross my mind to check that it would. Liquid reservoir has the same - apparently I can fill it to the brim with 800K petroleum, while the reservoir itself stays at a happy 25 C with minimal cooling. At least we'll have a solution if they decide to fix that shutoff, though. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1134384 Share on other sites More sharing options...
Saturnus Posted December 20, 2018 Share Posted December 20, 2018 It's the same with normal valves and bridges. They are not in contact with the transported liquid or gas. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1134386 Share on other sites More sharing options...
hackcasual Posted December 20, 2018 Share Posted December 20, 2018 7 hours ago, Boxman_90 said: I'll be damned - all this effort only for the shutoff turning out to be glitched. It seems it has indeed zero thermal contact with the liquid it's switching. Curious. It didn't even cross my mind to check that it would. Liquid reservoir has the same - apparently I can fill it to the brim with 800K petroleum, while the reservoir itself stays at a happy 25 C with minimal cooling. At least we'll have a solution if they decide to fix that shutoff, though. Yep, just keep everything in a vacuum. I will say I have noticed some weird behavior with the tile directly under the reservoir on the left side, where that seems to heat up to match the temperature of the contents. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1134548 Share on other sites More sharing options...
impyre Posted December 21, 2018 Share Posted December 21, 2018 I'll second @hackcasual, vacuum is a necessity (or at least it was before the latest update... haven't re-tested). As far as I've seen, the liquid in bridges and shutoffs tends to allow the liquid to transfer heat to the gas. It's a slow process, but in a small room eventually the gas heats up to the liquid temp. I have a shutoff system for moving around 1500C steam that's been heated by magma which I then use as my main heat source for industrial processes. I initially had problems with the shutoff melting, but using a vacuum fixed that. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1134815 Share on other sites More sharing options...
Sigma Cypher Posted December 21, 2018 Share Posted December 21, 2018 @impyre can you show your magma steam setup in action? Might motivate me to farm a bunch of thermium. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1135069 Share on other sites More sharing options...
peachkillu Posted December 21, 2018 Share Posted December 21, 2018 I don’t get it as far as I can see you have one input and one output for petroleum how is this sorting anything nvm the point was to switch on and off the flow without passing threw a valve I was confused by the first part of the post where it said you were tying to only allow hot liquid into your steam turbine build Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1135111 Share on other sites More sharing options...
impyre Posted December 23, 2018 Share Posted December 23, 2018 Spoiler The lava heating side. Steel radiant gas pipe and ceramic insulated pipe. Steam chamber heat exchanger and valve/shutoff combo (ventilation overlay). Closeup of valve/shutoff assembly in vacuum. I built them all with steel. @Sigma Cypher There you are. The bit of gold in the last image is from earlier. I accidentally built one of the heat exchangers of gold, thinking it wouldn't overheat. The short answer is that it won't under normal circumstances, but if the system gets overheated for whatever reason the gold can melt whereas the steel won't. The only reason I had the valves there was because initially I was using them for thermal control pre-QoL mk1... since the change I was able to switch to the thermo sensors and just wall it off completely. I just didn't bother deconstructing the valves. Link to comment https://forums.kleientertainment.com/forums/topic/100834-the-hot-liquid-shutoff-never-overheating-shutoff-valve-for-switching-hot-liquids-refinery-coolant-glass/#findComment-1135653 Share on other sites More sharing options...
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