In this section, I will outline the setup and operation of the Atmospherics Air-Conditioning Unit. This is a reasonably simplistic system that can be used to cool a room or a gas.

The setup here is pretty straightforward. An AC unit will take in gas on the input side and pass it to the output side, cooling it as it goes by dumping the heat into the waste gas. The AC unit is itself a pump, so you do not need to pump the gas into it. It will suck it in on its own. Likewise, it will pump that gas back out the other side. In the image above, I use a pair of passive vents to pull in the room atmosphere and spit it back into the room. The unit does not have any pressure regulation, so if attached to a pipe network, it will keep pushing gas into the pipes as long as it has gas to suck in.

The radiator you will want to be placed outside the room you are trying to cool. In this demo, I used a medium radiator, but pipe radiators will work as well. You will need to charge the waste line with gas. The best gas to use for this purpose would be pollutants.

The AC unit has a built-in thermostat, allowing you to designate what temperature you want the gas to be. The unit will automatically shut off and turn back on as needed to reach and maintain the desired temperature.

The setup for a wall cooler is nearly identical to the Atmospherics Unit. The only difference is the Wall Cooler does not have input and output ports for gas. It operates directly on the gas within the room, pulling heat into itself via its front face and dumping that heat into its connected waste pipe.

The Wall Cooler does not have an internal thermostat and will keep running as long as it is turned on until commanded to turn off via the power switch or a data signal.

In this section, I will go over the use of the Evaporation Chamber and the Condensation Chamber. This is a configuration that is working for me on Mars.

Here is a simplistic setup image for reference. I have color coded the sections.

The system features three distinct and separate gas networks that do not exchange gas, and 1 liquid network. There is the inside radiator network, the outside radiator network, and the exchange network. The machines will NOT take in any of the gas in either radiator network; only thermal energy is moved. I have the tank storage units placed on each network to charge the pipes with pollutants. Do not fill the liquid pipe with anything. The machines will use it once they begin operation. For my tests, I used pollutants as the gas with the highest thermal transfer rate.
Heat will be absorbed by the Evaporation Chamber and into the gas inside. The low-pressure hot gas will then move via the gas pipe to the Condensation Chamber, which will collect at high pressure. The high-pressure gas will condense into a liquid as it cools, the heat transferring to the outside radiator. The cool drink will then move from the Condensation Chamber to the Evaporation Chamber via the liquid pipe, which will be heated back into a gas that completes the cycle. In practice, you may find the majority of your cooled gas returning via the liquid pipe as a gas. This is fine as long as the pressure doesn't exceed 6,000 kPa, putting the liquid pipes at risk.

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First, decide where you want the two devices. In my test, I had the Evaporation Chamber inside the room to be cooled and the Condensation Chamber outside the room. I do not know if this is required for the system to work correctly or if they both can be inside or outside.

• Connect the Gas output connection on the Evaporation Chamber to the Gas input connection on the Condensation Chamber. This pipe is where hot gas from the Evaporation Chamber will move heat to the Condensation Chamber.
  
• Connect the Liquid out connection from the Condensation Chamber to the Liquid input connection of the Evaporation Chamber. This is your return line to move cold liquid, or gas, back to the Evaporation Chamber.
  
• You need to supply the machines with gas to use for the heat transfer medium via the pipe that runs between them. I have a canister storage unit placed on the line for my demo image above. I use canisters filled with pollutants to charge the system there. It took about 5 canisters pressurized to 5 kPa each to charge the machines fully.

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On the inside of the room you want to cool, you place a radiator. I have a medium radiator used in the image, and my tests, but pipe radiators should also work. This gets plugged into the Evaporation Chamber at the 'Gas heat exchange connection'. This is the radiator that will be used to absorb heat from the room to cool the room down. You will need to supply this network with a gas to function. I have a canister storage unit placed on the line for my demo image above. I use canisters filled with pollutants to charge the system there. I used a single canister for my radiator charge. Once you have gas in the line, you can remove the canister storage unit or leave it in place.

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On the outside of the room, you place another radiator. This radiator is where you will be getting rid of the heat you absorbed from the room. This radiator is connected to the 'Gas heat exchange connection' of the condensation chamber. I have a canister storage unit placed on the line for my demo image above. I use canisters filled with pollutants to charge the system there. I used a single canister for my radiator charge. Once you have gas in the line, you can remove the canister storage unit or leave it in place.

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You can use different gasses in the lines but know that each gas has very different thermal transfer properties, and our objective here is to move heat from one area into another.

Once everything is built and gas supplied, you are ready to set up the machines. I had the Evaporation Chamber set to about 100 kPa and the Condensation Chamber set to about 4,000 kPa. Once you have your pressures set, you are ready to turn the machines on.

Neither machine has a built-in thermostat, and they will keep running moving heat until turned off, either by their switches or by a command on the data port.

With the exception of the Atmospherics Air-Conditioner, you will need a thermostat circuit to control your air-conditioning devices; otherwise, they will just keep running non-stop, which may result in the room getting much colder than you want it to be.

Here is a simple circuit I have used.

NOTE: The gas sensor reads the temperature in Kelvin, and this circuit does not feature a conversion circuit to Celsius. I use other tools outside the game to do the conversion to figure out what I need to set my desired temp setting to.

When building your circuit, be sure to name your components something that makes sense and will allow you to find the right parts when programming the chips. In my diagram, I have wired everything in so that each input and output has only one option, with the exception being the output of the Logic Writer. This is not required and is rarely done in practice.


The output from the Logic Reader must be connected to the device's data port to be controlled. For some devices, the data port is shared with the power port, and other devices have separate power and data ports.