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"Ethanol can do heat deletion while phase-changing" This knowledge has been known since introduced ethanol. "How?" Ethanol Gas has lower SHC (Specific Heat Capacity) than liquid one. https://oni-db.com/details/ethanol : SHC 2.46 https://oni-db.com/details/ethanolgas : SHC 2.14 For example, "Repeating evaporation and condensation of 200kg ethanol" Require positive thermal energy to boil 200kg ethanol from 70c to 80c 2.46 * (80 - 70) * 200 = 4920 (kDTU) Require negative thermal energy to liquefy 200kg ethanol gas from 80c to 70c 2.148 * (70 - 80) * 200 = -4296(kDTU) Distance lacked heat energy: 4920 - 4296 = 614(kDTU) Generated heat from Aquatuner using water coolant : 528(kDTU/s) Result heat exchange: 528 - 614 = -96(kDTU/s) "Wait, will be it stronger than AETN!?" "Yes, but this is just a hypothesis. And in reality, you won't be able to handle large amounts of ethanol that way" However, some implementations are here @Blazing Falken 's "Crying Crab Cooler" GearHead-Gaming's ethanol boiler I tried more practical build. Self-cooling was succeeded. Structure & Demo A important trick is temp-shift plate. This keeps chill Igneous rock tile and earns heat capacity. I didn't wait for more than a dozen cycles to get this result It seemed that heat deletion was stronger than expected Advantages This can build with resources only start forest biome. Aluminum Ore. refined Aluminum Ethanol by wild Arbor-tree IgneousRock It's reasonable to play early-mid game in Arboria and Oasisse Arboria lack Gold-Amalgam. Start biome in Oasisse is surrounded by hot desert biome. It can be Selfpowered by petroleum generator. A tuned petroleum generator generates 3000W 4 Ethanol distiller requires 240 * 4 = 960W liquid pump requires 240W Instead Carbon skimmer, using door pump eraser. Totally, surplus power is : 3000 - (1200 + 960 + 240) = 600W How it works NOTE： This tips for pre-turbine technology. After enable to build steam turbine, this will be outdated system in your game.