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.

Contrary to popular belief, both values are enforced, so the Active Vent comes with the functionality of a Pressure Regulator and simultaneously also Back Pressure Regulator. Note that setting these value and changing the Mode afterwards is ill-advised: Changing the Mode always resets both values to their defaults (101/0 for pumping into the room, 0/50 for pumping into the pipe), so they must be set (if at all) *after* setting the Mode.

• In "Outward mode" (switch is blue), the Active Vent increases the external pressure by moving gas from the pipe network to the surrounding atmosphere, up to "PressureExternal", but never allowing the pipe's pressure to drop below "PressureInternal".
• In "Inward mode" (switch is red), the Active Vent decreases the external pressure by moving gas from the surrounding atmosphere to the pipe network, down to "PressureExternal", never exceeding the pipe pressure set in "PressureInternal".

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

Where (Outward vent):

• P = Pipe pressure (Min 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), and can be read with a Logic Reader, Batch Reader, or Integrated Circuit (IC10).

Click here to see/hide all the data network properties

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.