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Active Vent

Properties
Stacks	Yes (5)
Recipe
Created With	Hydraulic Pipe Bender, Fabricator
Cost	5g Iron, 1g Gold, 5g Copper

Active Vent

Operation
Power Usage	100W
Construction
Placed with	Kit (Active Vent)
Placed on	Small Grid
Stage 1
Deconstruction
Deconstructed with	Hand Drill
Item received	Kit (Active Vent)

Description

Active vents use power to move gas from and to pipes and the exterior. Its functionality depends on its mode:

• in "Outward mode" (switch in blue), the vent increases the external pressure (by moving gas from the pipes to the exterior) up to "PressureExternal", by default(*) equal to 101 kPa
• in "Inward mode" (switch in red), the vent decreases the external pressure (by moving gas from the exterior to the pipes) down to "PressureExternal", by default(*) equal to 0 kPa

"PressureExternal" and "PressureInternal" values should be modified programmatically via IC10 scripts, as they reset to default values on mode change. Values can be set through logic chips, if the value is modified after a mode change. 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.

(*) This is the reason why airlocks need an internal pressure of at least 100 kPa to work correctly. This behavior can also be inconvenient on worlds like Loulan whose atmosphere is well above 101kPa. Manually-operated "airlocks" for greenhouses can not pump back up to Loulan atmosphere during the exit cycle. If the pressure is already >101kPa the vent will have no effect, and if it is <101kPa the vent will stop when it reaches 101kPa.

(**) Unwanted behavior can be corrected by storing desired pressure value to 'PressureExternal' on every loop. Example:
s dActiveVentInterior PressureExternal rInteriorPressure
s dActiveVentExterior PressureExternal rExteriorPressure

To calculate the moles per tick, use the following equation: n = (P * V) / (R * T) (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 either use kPa and L, or Pa and M³.

Where (Inward vent):

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

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 (Pumping gas from the connected pipe network to the outside.)
1	"Inward" mode (Pumping gas from the outside to the connected pipe network.)
2	(Unknown)

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	Sets the Active Vent mode to the passed setting. (See Mode Values)
PressureExternal	Float	Mode 0 maximum room pressure, Mode 1 minimum room pressure. Value is overwritten to 101.325 in Mode 0 and 0 in Mode 1 when mode is changed. The vent will still consume energy when pressure is reached.
PressureInternal	Float	Mode 0 minimum pipe pressure, Mode 1 maximum pipe pressure. Value is overwritten to 0 in Mode 0 and 50662.5 in Mode 1 when mode is changed. The vent will still consume energy when pressure is reached.
Lock	Boolean	Locks the Active Vent, when set to 1. Unlocks it, when set to 0.
Setting	Float	Does not function.
On	Boolean	Turns the Active Vent on, when set to 1. Turns it off, when set to 0.

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 setting of 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.