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Symbol	Unit	Unit Symbol	Quantity	Definition
n	Mole	mol	Chemical Amount
T	Kelvin	K	Thermodynamic Temperature
	Celsius	℃	Temperature
t	Second	s	Time
	Tick		Physics Steps	0.5s
V	Cubic Metre	m	Spatial Volume	m³
	Liter	l	Spatial Volume
P*	Watt	W	Power	J/Tick
E	Joule	J	Energy
P*	Pascal	Pa	Pressure
	kiloPascal	kPa	Pressure	Pa/1000

Symbol	Value	Name
R	8.3144	Ideal Gas Constant

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• A room is any space, that is separated from the world atmosphere by walls, frames, doors and or voxels.
  • And is smaller than 1200 frames in volume.

• Cells are 2m x 2m x 2m cubes.
  • This means they are 8000 liters in volume.
• Rooms and the world are made from a grid of cells.
• Each cell contains its own atmosphere, which interacts with its neighboring cells and object inside themselves.

• Static structures follow a grid.

• The large grid follows the grid of cells.
• Frames snap to the large grid.
• Walls are placed on the sides of the large grid cubes.
  • Walls separate two cells, and prevent them from interacting with each other.

• The small grid is a grid that aligns with the large grid.
• The small grid is 4 times smaller than the large grid.

• Voxels (volumetric pixels) are what the terrain is made from.
• Voxels do not let gasses through them.

• The world contains everything else.
• The world is filled by the world atmosphere.

• Slots are a fundamental concept to understand.

• Many things are composed of networks.

• A Pipe network is a single volume, with no flow inside itself.
• They can be composed of pipes, or devices.
• Two separate pipe networks connected by a device, will interact like cells.

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• Partial pressure of a specific gas can be calculated like this: $Pp = P \times r_x$
  • Where:
    • $Pp$ = Partial pressure in kPa.
    • $P$ = Pressure in kPa.
    • $r_x$ = Ratio of some gas.

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• Cooling a gas decreases pressure, Heating increases pressure.
• The same amount of gas will be at higher pressure in a smaller container.
• Compressing a gas does not heat it up, nor does expanding it cool it down.
• Amount(mol) = (Pressure(Pa) * Volume(m³)) / (Ideal Gas Constant * Temperature(K))
  • Ideal Gas Constant = 8.3144

$n = (P \times V) \div (R \times T) $

$n = \frac{P \times V}{R \times T}$

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• The total energy of an atmosphere can be calculated with this formula:
  $E = T \times C$
  • Where:
    • $E$ = Energy in Joules.
    • $T$ = Temperature in Kelvin.
    • $C$ = Total heat capacity in Joules / Kelvin.

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• The total heat capacity of an atmosphere.
  $C = C_{O2} + C_{N2} + C_{CO2}$
  • Where:
    • $C$ = Total heat capacity in Joules / Kelvin.
    • $C_{O2}$ = Total heat capacity of oxygen.
    • $C_{N2}$ = Total heat capacity of nitrogen.
    • $C_{CO2}$ = Total heat capacity of carbon dioxide.
  • Expand:

    $C = n_{O2} \times c_{O2} + n_{N2} \times c_{N2} + n_{CO2} \times c_{CO2}$

    • Where:
      • $C$ = Total heat capacity in Joules / Kelvin.
      • $c_{O2}$ = Specific heat capacity of oxygen.
      • $n_{O2}$ = moles of oxygen.
      • $c_{N2}$ = Specific heat capacity of nitrogen.
      • $n_{N2}$ = moles of nitrogen.
      • $c_{CO2}$ = Specific heat capacity of carbon dioxide.
      • $n_{CO2}$ = moles of carbon dioxide.

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• Thermal convection happens fastest above 101.325 kPa, but works at any pressure above 0.
• Thermal convection power is linear with temperature Δ.
• Show example graph:

  • Graph shows effects of temperature Δ and pressure on two different objects.

Convection power can be calculated with the following formula:

E = thermalconvection * 50 * RATIOONEATMOSPHERECLAMPED(pressure1) * RATIOONEATMOSPHERECLAMPED(pressure2) * (temperature1 - temperature2)

$E = ThermalConvection \times 50 \times \min\bigl(\frac{P_1}{101.325},1\bigl) \times \min\bigl(\frac{P_2}{101.325},1\bigl) \times \Bigl(T_1 - T_2\Bigl)$

• "Thermal Convection" is listed in the stationpedia and wiki page of items.
• More details:

  E = CALCULATETHINGCONVECTION(convectionfactor, surfacearea, temperature1, temperature2, pressure1, pressure2)

CALCULATETHINGCONVECTION = GETCONVECTIONHEAT(surfacearea * RATIOONEATMOSPHERECLAMPED(pressure1) * RATIOONEATMOSPHERECLAMPED(pressure2), (temperature1),(temperature2)) * 0.5 * 1 * convectionfactor
  
  $E = \Biggl( 100 \times A \times \min\bigl(\frac{P_1}{101.325},1\bigl) \times \min\bigl(\frac{P_2}{101.325},1\bigl) \times \Bigl(T_1 - T_2\Bigl) \Biggl) \times 0.5 \times convectionfactor$
  
  

  • "convectionfactor" is not the same value as "Thermal Convection".
    • convectionfactor * surfacearea = "Thermal Convection".
    • "Thermal Convection" is listed in the stationpedia and wiki page of items.

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GETCONVECTIONHEAT

GETCONVECTIONHEAT = 100 * surfacearea * (temperature1 - temperature2)

$100 \times A \times (T_1 - T_2)$

• The value of surface area is not easily available.

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RATIOONEATMOSPHERECLAMPED

RATIOONEATMOSPHERECLAMPED = max(min(pressure / 101.325, 1), 0)

$max\Bigl(min(\frac{P}{101.325},1),0\Bigl)$

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• Thermal radiation only happens in vacuums or very low pressures.
• Thermal radiation is exponential.

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• Pressure Δ is the difference between two pressures.
  • For example the difference between the two sides of a wall.

$PΔ = |P_1 - P_2|$

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• Different worlds have different gravitational fields.
• Rooms have boosted gravity.

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• Sounds are less audible at lower pressure, and completely inaudible in a vacuum.
• Structures can block or dampen sounds.
• Sounds volume also weakens with distance.

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