Active Vent

Kit (Active Vent)

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

Active Vent

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

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

These are all Data Network properties of this device.

Mode Values

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

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

Parameter Name	Data Type	Description
Open	Boolean	Does not function.
Mode	Integer	Set the Active Vent mode. (See Mode Values)
PressureExternal	Float	"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	"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	Lock the Active Vent when set to 1. Manual operation is not possible while locked.
Setting	Float	Does not function.
On	Boolean	Turn on the Active Vent when set to 1.

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.

Data Outputs

These are all parameters, that can be read with a Logic Reader or a Slot Reader. The outputs are listed in the order a Logic Reader's "VAR" setting cycles through them.

Output Name	Data Type	Description
Power	Boolean	Returns whether the Active Vent is receiving power and is turned on. (0 for no, 1 for yes)
Open	Boolean	Returns whether the Active Vent is open. (0 for no, 1 for yes) (Untested)
Mode	Integer	Returns the current mode of the Active Vent. (See Mode Values)
Error	Boolean	Returns whether the Active Vent is currently flashing an error. (0 for no, 1 for yes)
PressureExternal	Float	Returns the desired external pressure of the Active Vent.
PressureInternal	Float	Returns the desired internal pressure of the Active vent. (Untested)
Lock	Boolean	Returns whether the Active Vent is locked. (0 for no, 1 for yes)
Setting	Float	Returns a range from 0.0 to 100.0. (Assumption) Returns the percentage amount of pumping throughput of the Active Vent.
Maximum	Integer	Returns 100. (Assumption) Returns the maximum throughput percentage of the Active Vent.
Ratio	Float	Returns a range from 0.0 to 1.0. (Assumption) Returns the percentage amount of pumping throughput of the Active Vent.
On	Boolean	Returns whether the Active Vent is set to on. (0 for no, 1 for yes)
RequiredPower	Integer	Returns the current amount of power needed for the Active Vent.