Air circulation problem

[DeadLineNine]

Hello,

I created a greenhouse to start some planting, so i managed to get CO2 in there but plants when growing will generate O2 and heat that i need to filtrate.

I try to make a room with a permanent air circulation (example 50kpa but always filtrated, so that O2 will be automatically vacumed) but i can't get it work correctly...

Is that possible ? I have two active vents one back pressure regulated for vaccum
and one pressure regulated for bellows but the air always vaccum and it can't keep a constant flow...Do the active vents need to be in the corner of room ?

I also don't know how that dump pressure regulator function, i try to reverse them to see what gives it, i think it work better but in the tutorial it say others things.

Im getting lost there, someone have a way to do that correctly ?!

[Rillruin]

Playing multiplayer Mars and I didn't set up the greenhouse so some of this may not be accurate/efficient but it should work. The setup may vary a bit if your not on Mars.

For heating cooling you'll want to set up a temp range. So for example cool if over 25C and heat if under 20C. If you don't have a temp range your heating and cooling will be constantly switching on/off to try and reach equilibrium. For cooling you can set up AC or an active vent pump that has radiators on the exterior section of the pipe to cool the pipe contents. For heating to start you can set up wall heaters but later you may want to set up radiators internally that pump hot gas into the greenhouse.

For O2 you can set up a pipe active vent that pumps the interior gas to a filter that filters out the O2 to the atmosphere or storage tanks and cycles the remaining gases back into the greenhouse. You can add a sensor that activates the pump any time O2 gets over a preset level.

It's more optimal if you set up the gas circulation so the in/out vent are in different corners of the room.

You may also want to pre-heat the CO2 before it enters the greenhouse so the gas doesn't freeze your plants if the temp drops too much.

[Delle(DK)]

It sound like you setup the room corectly

You need 2 x passive vents.
You need 1 backpresure regulator that is connected to the Exit passive vent with presure 99
And 1 presure regulator connected to your IN passive vent to presure 100

This will create endless circulation of the air since it pump in air with a presure of 100, but since the backpresure is 99 then then there will be a little airflow that slowly push the air ouf of the room and let new air in all hte time. with other words circulation.

I setup things in such a wasy that the exit gas from the greenhouse run via pipes to a long line of atmospheric machines that filter all kind of gas into different tanks.

And then finaly the IN pipes i take 2 pipes from the the tanks example 02 and c02 and use a gas mixer to mix the input air.

The down side of this system is it will not heat the gas.. HOWEVER you can on the moon and mars easy heat up things manualy via. the electric heater that you put on your wall.

Its a simple setup and it work fine.
You can even survive and make your plants grow with an even more easy setup that only have 1 type of gas ( 02 )

Example at the moment i play on Europa map and my base only have oxygen ( o2 ) and almost nothing els.. the plants grow as they should anyway.
HOWEVER since my base only have 02, then the base will explode if a fire break out or if i turn on a flare and its about 0 degrees indoor..
Just saying plants will grow in 100% 02, if themperature is about 15 degrees ;-)

(PS.. im not sure but in the past the temperature of the water dident matter at alle, i dont know if they fixed it so the water now need to be + degrees or not ).

PS.. be carefull when you raise the temperature indoor and its filled with gas.. Higher temperature will make the presure go up quite fast, so be carefull not to blow out your windows due to high presure.

[DeadLineNine]

Thank for your anwsers

Rillruin : Yeah your temperature setup function like a regulator and i already saw it in a tutorial, also i need it to control my greenhouse temperature (Need circuits logic to do that like compare units two memory for heat and cold something like that, but i need to test it lol)

Delle : I just tested in my game to have two passive vent instead of two active vent, and that work a little better = pression can now be controlled. But the air circulation is very low so O2 still generate from plant and even if it's connected to my filtration units, gasses still mixed and i only want CO2 in my greenhouse. I try to increase the gap beetween exit and input but still have some issue.

I think i need a atmospherics connected to input and waste go to my filtration unit so that will autofilter gasses like Rillruin say.

Can i set a an active vent to the input of CO2 instead of passive vent ? If i do that to the exit, gas will be vaccumed in the pipe just before the backpressure regulator and so that vaccum all the air in the greenhouse...

[DeadLineNine]

UPDATED NEWS !

Hello,

So i made a bunch of test to see what going on with this air circulation...And well i finaly choose the atmospherics filtration for O2 (Rillruin solution with logic and that really help !). Because using two passive vents or active vents with Back Pressure Regulator (BPR) and Pressure Regulator (PR) cause a lot of issues that i can't remove the negative effect.

On the first view, the air speed circulation is a problem because when i connected both of passive vents (with PR and BPR) the circulation is very very low...I need to wait years for the room to be filled with pression (i a room 3x3 and enough CO2 i think.) and i don't know why this so slow.

If i use active vents on exit side of the air, this one is stack the air into the pipe just before the BPR, so pressure is increasing a lot ! (Even if i increase the output !) and also the exit active vents is more powerful for vaccum instead of bellows the air, i got pressure gap in the room and sometime the active vent vaccum all the air...

Already try with a volume pump but just before PR or BPR the air stack in the pipe that cause pressure to increase and the risk to blow the pipe lol

So well im satisfied with filtration unit automatically controled with logic, the only thing i need to think about it is the arrival of CO2 if i need to fill again the room because i noticed plants consume CO2.

If anyone want to say something...

[Heightmare]

They consume CO2 but only require a small amount. Adding it to what you're already processing would be fine. Chances are venting your waste tank from your suit would provide enough for your plants to breathe for quite some time.