Vacuum question

[Jigsawn]

Am I right in saying that you need gas in order to transfer heat?

Reason I ask is that I have a refinery with a gas pump in the same sealed room. The pump takes the natural gas that the refinery emits, using an atmo sensor. Next to the refinery is a wheezewort. The refinery used to cool over time when not in use, thanks to the wheezewort.

However, I changed the atmo sensor for the pump to pump everything out. Eventually it made a vaccum in the room. But now my refinery doesn't seem to be cooling at all. I am guessing that the vaccum means there is nowhere for the heat to escape to? And wheezewort doesn't create cold, but rather absorbs heat from the gas in the air, rather than just nearby objects? So I need some kind of atmosphere?

I've forgotten my basic physics - how does vacuum work in real life? I thought space was very cold, and that's vacuum. But obviously if you suck the air out of a bottle, it's not cold - so if vaccum doesn't transfer heat, why is it cold in space? And how does the sun's heat reach us through vacuum? Does ONI have different rules for vaccum than real life? 

Cheers

[JonnyMonroe]

Wheeze sucks in 1kg gas in its bottom tile and spits it out it's top tile 5 degrees lower.

So yes, the efficiency of a wheeze is very much dependant on what gas it is sat in.

[Oozinator]

 

[Mutineer]

Physic - Temperature = speed of molecules, If there no molecules, the temperature of space is absolute 0.

Now, Sun as any hot object emits infrared and visible light. They do not interact with Vacum, as there nothing to interact with. But when they hit an object they will heat it up. "Oxygen not included" does not have infrared and light heat transfer. It has heat transfer only between materials, gas, liquid or solid. So. Vacum is a perfect isolator. Do not live your machinery in Vacum or they will overheat. But you can create a vacuum between walls, this perfectly isolates something very hot from your base. Usually, it is not needed, as abesalite has near perfect isolation property. But if you run out you can use Vacum.

[BlueLance]

In short, unless there is a liquid of gas, the machine has nowhere to transfer its heat, I do NOT know if machines can transfer heat to the tile they are sat on though.

[FIXBUGFIXBUGFIX]

In real world, the sun heats the earth by radiation. But there is no radiation in ONI Thermodynamics so far.

In ONI Thermodynamics, most heat transfer involves CELL. 

18 minutes ago, BlueLance said:

I do NOT know if machines can transfer heat to the tile they are sat on though.

They can't. But if Entity (which includes dupes, geysers, mined element chunks and stored items, pretty much everything which is neither a building or a cell) cannot exchange heat with this cell (i.e. vacuum), it will exchange heat with the cell below, at a lower rate.

[Supraluminal]

8 hours ago, Mutineer said:

Physic - Temperature = speed of molecules, If there no molecules, the temperature of space is absolute 0.

Now, Sun as any hot object emits infrared and visible light. They do not interact with Vacum, as there nothing to interact with. But when they hit an object they will heat it up. "Oxygen not included" does not have infrared and light heat transfer. It has heat transfer only between materials, gas, liquid or solid. So. Vacum is a perfect isolator. Do not live your machinery in Vacum or they will overheat. But you can create a vacuum between walls, this perfectly isolates something very hot from your base. Usually, it is not needed, as abesalite has near perfect isolation property. But if you run out you can use Vacum.

I don't think a perfect vacuum can be said to have a temperature, really, since temperature implies a medium that could conceivably contain or conduct thermal energy.

Pedantry aside, as you say, in the real world, electromagnetic radiation (infrared and other frequencies) is a means by which heat energy can be transmitted through a vacuum, carried by photons. And no radiation in ONI = perfect insulation across vacuum.

8 hours ago, Jigsawn said:

Am I right in saying that you need gas in order to transfer heat?

Reason I ask is that I have a refinery with a gas pump in the same sealed room. The pump takes the natural gas that the refinery emits, using an atmo sensor. Next to the refinery is a wheezewort. The refinery used to cool over time when not in use, thanks to the wheezewort.

However, I changed the atmo sensor for the pump to pump everything out. Eventually it made a vaccum in the room. But now my refinery doesn't seem to be cooling at all. I am guessing that the vaccum means there is nowhere for the heat to escape to? And wheezewort doesn't create cold, but rather absorbs heat from the gas in the air, rather than just nearby objects? So I need some kind of atmosphere?

I've forgotten my basic physics - how does vacuum work in real life? I thought space was very cold, and that's vacuum. But obviously if you suck the air out of a bottle, it's not cold - so if vaccum doesn't transfer heat, why is it cold in space? And how does the sun's heat reach us through vacuum? Does ONI have different rules for vaccum than real life? 

Cheers

FWIW, cold is just the absence of heat, like darkness is the absence of light. "Creating cold" is the same thing as destroying heat. (Or in real life, removing heat from one place to somewhere else, since you can't actually destroy energy.)

Wheezeworts do work by deleting heat from the gas surrounding them (I think from the bottom of the two cells they occupy, to be exact). Without an atmosphere, they do nothing. And since they work on packets of 1kg of gas per second, their efficiency is diminished in low-pressure environments.

To go back to vacuum physics, it's not actually cold in outer space per se. Hot things can take a long time to cool down there, and getting rid of waste heat so as not to cook the innards of a spacecraft (e.g. computers, crew) is a big engineering challenge. Practically all spacecraft have radiators for this purpose that dump excess heat via EM radiation.

Eventually any object in space will reach some equilibrium temperature based on its surface area, incident light from the sun and other bodies, and material composition. Basically, as long as the object is radiating more energy than it's taking in, it will cool down; if it's receiving more than it's emitting, it will heat up. The Earth's equilibrium depends heavily on the insulating qualities of its atmosphere, which in turn depend heavily on CO2 concentrations, which is why people who are familiar with all this stuff wake up in cold sweats in the middle of the night a lot these days.