Gas Reservoir

This article has not been revised for the current version (***U50-587362***). It was last updated for *AP-398142*. It may contain inaccuracies.
This article has not been revised for the current version (***U50-587362***). It was last updated for *AP-398142*. It may contain inaccuracies.

## Gas Reservoir

Stores any Gas resources piped into it.

Reservoirs cannot receive manually delivered resources.

### Ventilation

Input: Gas Intake Pipe
Output: Gas Output Pipe

### Auto Out

**Green**: Emptied below low threshold
**Red**: Filled above high threshold

## Materials

### Metal Ore

400 kg

**Gas Reservoir** is a building that allows for 150 kilograms of Gas storage.

It can connect to a Gas Intake Pipe and a Gas Output Pipe, and is useful as a power-free in-line buffer, since it also eliminates need for intermediary Gas Pumps. At least one segment of Gas Intake Pipe must be connected for Gas Reservoir to work. Gas Output Pipe is optional.

Be aware the Reservoir can overheat depending on the environment it is sitting in, and has a low initial overheat temperature of 75 °C. It's best to build them out of Gold Amalgam or steel if you are dealing with high temperature environments.

* Generally though, it is best not to expose Reservoirs of any kind to extreme environments. They release their contents when they are completely damaged, which can be a major problem, especially for Gas Reservoirs.

## Disabling the Reservoir

Reservoir can be disabled by Duplicant, when disabled it only stops outputting its content, while still accepting the input.

This can also be achieved by destroying the base the Reservoir is built upon, which can be automated by building it on top of a Mechanized Airlock and open and closing it via automation. Only a single tile of the Reservoir must be on top of an open Mechanized Airlock for it to be disabled.

## Liquid Reservoirs Versus Gas Reservoirs

Resources are best kept in the form of solids, because Storage Bins remain the most economical and compact means of storage. However, if resources cannot be feasibly kept in solid forms due to volatile thermal properties (e.g. narrow temperature ranges in between their forms), then they have to be kept in fluid form.

In this case, the Liquid Reservoir is a better choice, if the resource can be held in liquid form prior to any downstream processing. For example, if the player's intention is to hold fuel for Hydrogen Generators, it is better to keep Water in Liquid Reservoirs (for piping into Electrolyzers later) than keeping Hydrogen in Gas Reservoirs.

* However, the Gas Reservoir allows for easier pipe-laying (due to its larger blueprint) than Liquid Reservoirs, especially if the Liquid Reservoirs are to be placed next to each other.
* Moreover, having a Gas Reservoir for holding the results of downstream processing, e.g. the Hydrogen from Electrolyzers and their attendant Gas Pumps, allows for considerable reserves in the case of disruptions and for easier monitoring.

## Tips

* Contents inside the reservoir *only* exchange heat with the tile directly below the reservoir's output port (confirmed in LU-366134). It will especially *not* heat up or cool down the reservoir itself (although this may be a bug). If the tile is a vacuum (by placing an Airflow Tile or Mesh Tile and removing any gas or liquid that would flow into it), then there will be no heat exchange at all - i.e. you can store very hot or very cold gases in a Copper reservoir without them heating up or cooling down their surroundings.
* Gas Reservoirs are even less space-efficient than liquid ones, since the tile container with the same dimensions can hold twice as much, when High Pressure Gas Vent is used.
	+ However, Reservoirs are more energy efficient and more convenient, due to their inclusion of output and input ports (which can already drive fluid flow on their own). More importantly, Gas Reservoirs, like Liquid Reservoirs, do not block access.
* If a reservoir is submerged in Chlorine, any germs on its contents will be quickly killed.
* Gas Reservoirs average out the temperature of each gas pumped into it (thus smoothing out temperature spikes/differences from the input gas). This allows, for example, for much easier temperature control if a Gas Pipe Thermo Sensor is placed on the output pipe.
* Gas Reservoirs automation outputs can be used to control filters with a NOT Gate, to ensure that the filter only operate when the tank has filled up to a certain level, and fully take advantage of the buffering capabilities of the reservoir.
* If multiple gases are stored(H2,O2,Cl,CO2 from lighter to heavier), output cycles through all stored gases, but heavier gases get slight priority and the lightest gas(Hydrogen) will remain if multiple different gases of the same amount are stored. This is probably intended and due to the output tile being at the bottom of the reservoir, hence output prioritizes heavy gases.

## History

* **RU-284571**: Introduced.
* **AP-395113**: **Gas Reservoir** and Liquid Reservoir have smart storage functionality
* **AP-397125**: More buildings are brought forward into Overlay space in the Gas / Liquid conduit overlay

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