cooling a growing room

[outlaw]

guys, my experimentation so far fails, how do I cool this room?
temp is growing, now 31oC, my 1st setup doenst work.

https://postimg.cc/sBTDzjpk

Also the plants need co2, is it enough If I just flush suit waste canister from time to time?

[MrTenneal]

Its the windows, the sun is heating up the room with all those windows. I normally have an Iron frame floor and roof and use a window or two just above where my plants grow.

[mazrados]

Regarding plants, in stationpediaa is described how much CO2 (or other substance) particular plant needs. I guess that CO2 from waste tank might be not enough.

[mazrados]

I had similar cooling system initially. Also on Mars. But I added more radiators outside. Inside 1 was enough. I kept increasing pressure during nights to cool gas inside and preserve temperature longer but eventually changed it to AC for automation.

[Khaylain]

It should be fairly easy to cool your growing room by having a long pipe that goes with one half inside the "greenhouse" and the other half outside. Cover the outside pipe sections in pipe radiators, cover the inside pipe sections in pipe convection radiators, and have a valve placed so it's "in the window" and you'll be able to open and close it both from inside and outside. Fill the pipe with a gas that works well with the temperatures it may be subject to (I'm not that bothered by it since I don't play with the Phase change update, but most people probably will).

You can even automate this with an electronic valve that opens and closes based on the temperature.

See https://steamcommunity.com/sharedfiles/filedetails/?id=1283505695 for a guide.

[MrTenneal]

Originally posted by mazrados:

Regarding plants, in stationpediaa is described how much CO2 (or other substance) particular plant needs. I guess that CO2 from waste tank might be not enough.

depeding on the room size its going to take a "few" dumps to get enough

[LoboFH]

Radiators should cool the greenhouse easily, I use a Digital Valve though.

No, waste gas won't be enough when you have lot of plants. They need at least 5% CO2. On Mars you can colect 18-20ºC daytime gass and filter the CO2, more than enough for a small greenhouse.

[mazrados]

@Khaylain

At both sides should be convection radiators. Convection works in atmosphere, radiation only in vaccuum. You can check it with atmo analyzer.

@MrTenneal

You are right. It depends on room size and what you plant. I mean how many plants because requirements are copy/pasted for each plant (hopefully it will be more interesting in the future).

[outlaw]

thanks guys for all the valuable answers! Im in panic mode now, cause I have only 1 food can left, so ill need to produce anything edible asap. Maybe Ill try to make a dark room with growing light, my only worry is time, lol - fun game ;)

[ulzgoroth]

Originally posted by mazrados:

@Khaylain

At both sides should be convection radiators. Convection works in atmosphere, radiation only in vaccuum. You can check it with atmo analyzer.

You're assuming a world with an atmosphere?

[mazrados]

@Ulzgoroth

Supplied screenshot in initial post suggests it's Mars :)

[Khaylain]

Originally posted by mazrados:

@Khaylain

At both sides should be convection radiators. Convection works in atmosphere, radiation only in vaccuum[sic]. You can check it with atmo analyzer.

Nope, radiation works in both atmosphere and vacuum. You can check this with the atmosphere analyzer as you said; you can see that pipes with a temperature difference to the room they are in show a number in the "radiated" part. I don't remember which way the numbers were, but I believe that negative numbers mean the temperature is transferred from the pipe/network to the environment (room or external vacuum/atmosphere)

AFAIK the meaning is that convection "radiators" are a bit better to equalize temperature with a high enough (external) pressure. What that (external) pressure needs to be I don't know.

The reason radiation works in both atmosphere and vacuum is that it accepts and supplies heat in the form of light, while a convection "radiator" uses gas moving close to it to transfer the energy. This is why you can even heat your base by using radiators, as they will accept the energy of the sun to a greater degree than convection "radiators". There's a reason the radiators on the International Space Station are kept with the edge towards the sun; otherwise they would gain heat.

[mazrados]

@Khaylain

I checked it. For convection radiators it says: convected x > 0, radiated 0. For radiation type it says: convected 0, radiated x > 0.

[mazrados]

OK I see misunderstanding. You say about pipes but I say about radiators.

I don't remember about pipes. It's possible they convect and radiate as well. But for radiators it depends on type. Convection radiators only have convection, radiation type radiators have only radiation.

[Khaylain]

Pipes and radiators both radiate (yes, the convectors do as well to a small degree)
The actual radiators are just better at it than the pipes themselves

[mazrados]

This is not true.