Active Vent

2023-05-13T08:38:31Z

2003:F3:2F03:D200:6C90:1199:A2ED:FE82:

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[[Category:Atmospherics]]
{{Itembox
| name = Active Vent
| image = [[File:ItemActiveVent.png]]
| createdwith = [[Hydraulic Pipe Bender]], [[Fabricator]]
| cost = 5g [[Iron]], 1g [[Gold]], 5g [[Copper]]
| stacks = 5
}}
{{Structurebox
| name = Active Vent
| power_usage = 100W
| image = [[File:StructureActiveVent.png]]
| placed_with_item = [[Kit (Active Vent)]]
| placed_on_grid = Small Grid
| decon_with_tool1 = [[Hand Drill]]
| item_rec1 = [[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.

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 m<sup>3</sup>.

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 Header}}

=== Mode Values ===
These lists the values and meanings for the "Mode" property of the Active Vent.
{| class="wikitable"
|-
! 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}}
{| class="wikitable"
|-
! Parameter Name !! Data Type !! Description
|-
| Open || Boolean || Does not function.
|-
| Mode || Integer || Sets the Active Vent mode to the passed setting. (See [[#Mode_Values|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}}
{| class="wikitable"
|-
! 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|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.
|}
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Active Vent