Sevio Posted September 19, 2017 Share Posted September 19, 2017 Edit: Testing has uncovered an unexpected problem where the hydrogen in the system slowly disappears. Unless I can find a way to avoid this from happening or I can work out another compact, simple liquefier which isn't prone to gas loss, I unfortunately can't recommend building this right now. But perhaps the instructions can still aid someone with building their first oxygen liquefier of their own, or inspire them to build an even better liquefier! Hello everyone and welcome to my Oxygen Liquefier tutorial! In this tutorial I aim to show newer players in 5 straightforward steps how to build the MiniLOX, a compact machine that makes liquid oxygen. You can use this to clean up caves filled with Polluted Oxygen and make it safer to breathe for your duplicants. I've seen various designs floating around the forums in newer and older threads, there are multiple ways to go about it but one thing they tend to have in common is that they tend to be large and can look pretty intimidating for players who are not used to building and experimenting with large systems. I also haven't seen a step by step building guide for them yet, so here I am with this one. The oxygen liquefier I will show in this tutorial isn't among the most powerful, nor is it the most power efficient. But it is compact and I've done my best to keep the startup time low so you get to see your first liquid oxygen as soon as possible after building it, without waiting for many cycles for your room to cool down. If you're already familiar with oxygen liquefiers and are looking towards the Aquatuner as your favorite way of making liquid oxygen, this build's minimal startup time also makes it suitable as a temporary setup to make a starting supply of liquid oxygen, allowing you to get the Aquatuner party started. Here's the MiniLOX in action: What you will need: 12 kg of Hydrogen Good supply of Abyssalite (for pipes and tiles that keep the heat out) A good amount of battery storage on your main power network and a Power Transformer (not shown in build) A good building location - because this machine will make a fair amount of heat, it's a good idea to build this low in your base, so the heat has a chance to spread out and upwards instead of getting bottled up where the Thermo Regulators are. The area you build it in should also have no CO2. While following this tutorial, keep these things in mind: Where you see insulated Purple tiles, you build normal tiles made of Abyssalite. Where you see insulated Yellow pipes, you build normal pipes made of Abyssalite. Where you see normal White pipes, you can use standard materials like Sandstone. So without further ado, here's the 5 steps in which to build the MiniLOX! Step 1: Building the pump chamber We will build the pump chamber first as shown below. We also build some pipes and wires on this side of the build as this part of the room will become inaccessible to duplicants in the next step. Make sure your duplicants can access the chamber via the ladder and not from above, as this will be important later. In the gas overlay, we build abyssalite pipes out from the pump and to the side: Wiring overview: Step 2: Building the liquefier In this step we build the rest of the liquefier room and all the machines and wiring that we'll need. The order doesn't matter, as everything that still needs to be built is accessible to the duplicants from here on. We add the Thermo Regulators, a thermo switch to control the gas pump, the liquid pump and a hydro switch to control it. We add two vents, one for the hydrogen and one for the polluted oxygen. And we add a gas valve so we can control how much polluted oxygen we let into the room. More on the liquid and wire bridges below. In the gas overlay we build Abyssalite gas pipes for the Pump and the Thermo Regulators, as well as the polluted oxygen input line with normal materials. The polluted oxygen line doesn't have to come from above, this just happened to be convenient for me in my debug savegame. In the Liquid overlay we build an Abyssalite pipe out of the room for our liquid oxygen. Also note the two overlapping liquid bridges - they don't have any pipes connected but they will help the hydrogen cool the oxygen much faster. Any material except Abyssalite will do. Wiring overview - note the wire bridge here on the right side of the room. It's not connected but again, helps the hydrogen cool the oxygen faster. Step 3: Vacuuming the liquefier Now that all of the machines are built, it's time to remove the access ladder and close up the room, so we can make it a (near) vacuum. Because the access was in the lower right corner of the room, any CO2 that your duplicants breathed out should have left the room by the time you're ready to close it up. If the area you were in has filled with CO2 since you started building, you should get rid of that first before closing the room. Now that it's closed, set the Atmo Switch to Above 0 g, the Thermo Switch to Above -200 C and the Hydro Switch to Above 50 kg. Now you can connect the machine to your power line (remember to have a Power Transformer between your main network and the MiniLOX!) In the gas overlay we build a temporary vent so we can pull out most of the oxygen still in the room. We connect it up with a temporary gas bridge to prevent the gas from going into the thermo regulators. Once the gas bridge is in place, the pump should start pumping all the gas out of the room. You don't have to wait until the room is completely vacuum - once only a few grams of oxygen per tile is left, it's fine to shut off the pump. You should do this by setting the Atmo Switch to Above 600 g. We also deconstruct the temporary gas bridge and vent. Now the MiniLOX is ready to accept hydrogen! Step 4: Adding hydrogen The MiniLOX needs enough hydrogen to circulate through the Thermo Regulators but not so much that the room gets overpressurized too easily once there is liquid oxygen and polluted oxygen inside. We build a gas pipeline to the Gas valve. This will be used later for polluted oxygen, but for now we can also use it to fill the room with just the right amount of hydrogen. To make sure we add exactly 12 kg of hydrogen, we set the Gas Valve to 0 g/s so it doesn't let any gas through. Then we fill the gas pipeline with hydrogen from electrolyzers. While this is filling up, make sure you have constructed the new gas bridge on the left. This will help combine the hydrogen packets from the pump into larger ones and save you some power on the thermo regulators. Once 12 pipe tiles have filled up with hydrogen, we can cut off the rest of the pipe, as we have exactly 12 kg of hydrogen now. In this example the gas pipe with the yellow X is the 13th gas pipe and should be deconstructed. Now we build a gas bridge with the green arrow on top of the end of the pipeline to push the hydrogen towards the Gas Valve and set the Gas Valve to 10000 g/s to allow all the hydrogen in. Once enough hydrogen has made it in, the MiniLOX should start up and begin cooling the hydrogen to -200 C. Any residual oxygen in the room will end up in the bottom right of the room and get liquefied once it has reached a low enough temperature. Reminder: Atmo Switch should be set to Above 600 g, the Thermo Switch to Above -200 C and the Hydro Switch to Above 50 kg. Step 5: Starting up! Now that it has hydrogen and is cooling down, The MiniLOX is ready to run! All that's left to do is set your Gas Valve to 50 g/s and connect your gas pipeline to some polluted oxygen. If you gave the room time to cool down to -200 C, you should see your first liquid oxygen start to form very quickly. If it hasn't entirely cooled down yet, it will take a bit longer but the pump will start working faster now that the hydrogen is being pushed into the top half of the room. If you want it to go faster, you can turn up the gas valve but if you don't have much liquid oxygen yet, adding too much polluted oxygen at once will make it evaporate again, which can sometimes allow too much polluted oxygen to build up inside the room. If that happens, you should shut off the Gas Valve and give the Thermo Regulators to catch up and make everything liquid again. The MiniLOX will create quite a bit of heat while you're making liquid oxygen. One way to deal with it is to put some wheezeworts nearby, another is to put a liquid vent above your thermo regulators and connect the liquid pipeline to it. This way, the liquid oxygen you're making will cool your thermo regulators and you get your oxygen back into your base at the same time! And that's it for this tutorial! You now have a working Oxygen Liquefier that fits in a pretty small space. I hope you found my tutorial useful and maybe following it has made you a bit more familiar with how you can use Hydrogen and Thermo Regulators to cool things down and how the different switches and valves can help you precisely control pressure and temperature. If you'd like to have a look at the savegame I used to make this tutorial, you can check it out below. There's also some radiator based designs I experimented with but those take a longer time to cool down to temperature and need a lot more space. (Warning, you will need to use debug mode in order to see everything) The First Law Superchill.sav Link to comment Share on other sites More sharing options...
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