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Kit (Active Vent)

Properties
Stacks	5
Paintable	Yes
Recipe
Created With	Hydraulic Pipe Bender
Cost	5 5 1
Logic
Item Hash	-842048328

Active Vent

Paintable	Yes
Operation
Power Usage	100 (100W)
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 surrounding atmosphere. It requires electric power to work (100 Watt). Its functionality depends on the selected mode:

• In "Outward mode" (switch in blue), it 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), it 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"

"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.

(*) 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.

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 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

(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.