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Active Vent

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Kit (Active Vent)
ItemActiveVent.png
Constructing Options Active Vent
Properties
Stacks Yes (5)
Recipes
Hydraulic Pipe Bender 5g Iron, 1g Gold, 5g Copper
Logic
Prefab Hash -842048328
Prefab Name ItemActiveVent
Logic Classes
SlotClass.None
SortingClass.Kits



Active Vent
StructureActiveVent.png
Operation
Power Usage 100W
Prefab Hash -1129453144
Prefab Name StructureActiveVent
Construction
Placed with Kit (Active Vent)
Placed on Small Grid
Stage 1
Deconstruction
Deconstructed with Hand Drill
Item received Kit (Active Vent)



Description[edit]

The Active Vent moves gas between the connected Pipe Network and the atmosphere surrounding the active vent. It requires electric power to work (100 Watt).

The "PressureExternal" value is a measure of the atmosphere surrounding the active vent. The "PressureInternal" value is a measure of the pressure inside the active vent pipe network.

Its functionality depends on the selected mode but when used manually both modes only use the "PressureExternal":

  • In "Outward mode" (switch in blue), the active vent increases the external pressure by moving gas from the pipe network to the surrounding atmosphere, up to "PressureExternal", by default equal to 101 kPa
  • In "Inward mode" (switch in red), the active vent decreases the external pressure by moving gas from the surrounding atmosphere to the pipe network, down to "PressureExternal", by default equal to 0 kPa

The "PressureExternal" value is set to 100 kPa when the Circuitboard (Airlock Control) is used in a Console. This is the reason why the airlock is unable to pressurise when the atmosphere surrounding the active vent is unable to reach 100 kPa within the airlock.

The "PressureExternal" values can also be inconvenient on worlds like Loulan whose atmosphere is well above 101kPa. Manually-operated airlocks can not equalise the pressure within the airlock during the exit cycle to the Loulan atmosphere pressures. Without equal pressures you can not prevent wind currents from occurring when opening airlock doors. The active vent has no effect when the external pressure within the airlock surrounding the active vent is already >101kPa. When the pressure is <101kPa the vent will stop when it reaches 101kPa.

The "PressureExternal" and "PressureInternal" values can be modified using logic chips or programmatically via IC10 scripts.

Note: These values reset to default values on mode change. Values can be set through logic chips, if the value is modified after a mode change.

Note: Switching logic chips off then on will not modify values on the active vent, the values supplied to the chips must be altered for the values to be written.


To calculate the moles per tick, use the following equation:

n = (P * V) / (R * T)

Where (Inward vent):

  • P = Min(Room pressure, 10.1325 kPa)
  • V = 8000 litres
  • n = Moles per tick
  • R = Gas constant (8.3144)
  • T = Room temperature

Where (Outward vent):

  • P = Min(Pipe pressure, 10.1325 kPa)
  • V = Pipe volume in litres
  • n = Moles per tick
  • R = Gas constant (8.3144)
  • T = Pipe temperature

(These do not take into account the constraints imposed by "PressureExternal" and "PressureInternal")

Note: In order to get the proper units out of this calculation you need to use either kilopascal (kPa) and litre (l), or Pascal (Pa) and cubic meters (m3).

Note: The insert slot currently takes any item and seems to have no effect.

Data Network Properties[edit]

These are all Data Network properties of this device.

Mode Values[edit]

These lists the values and meanings for the "Mode" property of the Active Vent.

Value Meaning
0 "Outward" mode (Moves gas from the connected pipe network to the surrounding atmosphere.)
1 "Inward" mode (Moves gas from the surrounding atmosphere to the connected pipe network.)

Data Parameters[edit]

These are all parameters that can be written with a Logic Writer, Batch Writer, or Integrated Circuit (IC10), and can be read with a Logic Reader, Batch Reader, or Integrated Circuit (IC10).

Parameter Name Data Type Access Value Description
Power Boolean
Read
0 Off Can be read to return if the device is correctly powered or not, set via the power system, return 1 if powered and 0 if not
1 On
Open Integer
Read Write
1 if device is open, otherwise 0
Mode Integer
Read Write
0 Outward The mode of the Active Vent.
1 Inward
Error Boolean
Read
0

1 if device is in error state, otherwise 0
1 Error
PressureExternal Float
Read Write
"Outward" mode: Maximum pressure of the surrounding atmosphere. The default value is 101.325 (kPa)
"Inward" mode": Minimum pressure of the surrounding atmosphere. The default value is 0 (kPa)
PressureInternal Float
Read Write
"Outward" mode: Minimum pipe network pressure. The default value is 0 (kPa).
"Inward" mode: Maximum pipe network pressure. The default value is 50662.5 (kPa).
Lock Boolean
Read Write
0 Unlocked Disable manual operation of the Active Vent.
1 Locked
Setting Integer
Read Write
A variable setting that can be read or written.
Maximum Integer
Read
Maximum setting of the device
Ratio Float
Read
0.0 to 1.0 Context specific value depending on device, 0 to 1 based ratio
On Boolean
Read Write
0 Off The current state of the Active Vent.
1 On
RequiredPower Integer
Read
Idle operating power quantity, does not necessarily include extra demand power
PrefabHash Integer
Read
The hash of the structure
ReferenceId Integer
Read
Unique Reference Identifier for this object
NameHash Integer
Read
Provides the hash value for the name of the object as a 32 bit integer.


Note: The value of "PressureExternal" and "PressureInternal" will be reset to the default when changing modes.

Note: If turned on, the vent will still consume energy when the target pressure is reached.