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Helium results!!! Window air con chill box build. - Page 7

post #61 of 118
Thread Starter 
Quote:
Originally Posted by drbaltazar View Post

your balloon idea wont work!why?because external air is lets say 40 celcius and internal air is - 24 celcius this will create condensation and corrupt your system i suspect .but then i could be wrong!
basicly the heat is coming in by the baloon and by the cpu!me i would live with the vacuum you mention and try it like that !use plastic to plug the hose if you do.
as for the start and stop ,a/c are meant to start and stop they arent meant to run all the time!but you can probably bypass the termistor or whatever they call it in english

Once the balloon has equalized the pressure between the atmosphere and the chamber there is next to no flow of air between them. To penetrate the chamber from the balloon heat would have to pass along a 19mm tube which is about 50cm long.......heat penetration via this route is minimal.

The proof of this is that the chamber is holding a temperature of -21 deg C while the pc system is under full load using about 500 watts....that's with the balloon as well....the chamber works fine.

You have the condensation issue the wrong way around, it will tend to form on the outside of the balloon and on the outside of the chill box if it were not heavily insulated.

But you are correct in that water vapor in the air within the chamber is a potential problem.....that's why the system has to be sealed,that is why the balloon is important as it equalizes pressure and prevents any external air being sucked it, the system is always under slight positive pressure to prevent that, if it were not then more and more moisture would be drawn into the system by the cold.

As it is now the 60 to 70 liters of air contained in the system would, even if 100% saturated at normal ambient temps, only contain about 1cm^3 of water.

That is further removed by desiccant and when you start the system you start the ac unit first......this further condenses out any moisture in the chamber air on the ac unit evap rad.
Also the pc components will always be warmer than the surrounding air in the chamber again removing any tendency to condense on them....so no condensation isn't and won't be a problem.

You say I should have a vacuum in the chamber....please explain how I could use air cooled components in a vacuum? oh sorry did you just mean low pressure...which is actually again counter productive for air cooling.

Ps the thermistor has already been removed from the evap.......I just need to put it somewhere warmer.
Edited by technogiant - 7/2/12 at 10:58am
post #62 of 118
mm maybe i missunderstood what was going on then!could you post again the issue wording it differently!might help!ty!

one question!what is the physical difference between hot air and cold air!hot air expend (hot air ballon)and cold air shrink!

since you tightly control the total amount of air in the chamber!only a limited amount can heat or cool at any given time right?

if there was a vacuum (total lack of air)what would cool the cpu?

ok i think i know what is going on!you created a heat vacuum !if i aint mistaken!like a geotermal heat thing!(the idea it suck the warm out of deep ground and bring it to the surface!)you?i think your are sucking the warmth from the radiator water etc !not sure here!but it is the only improbable possibility!
post #63 of 118
Thread Starter 
I'm not quite sure what you mean Dr, but the balloon is there because as you cool the air in the chamber it contracts. If the chamber were sealed without the balloon this would cause a low pressure that would tend to suck air in through any leaks. Instead the balloon shrinks to allow air in.
But of course the air in the chamber and balloon only contains a small amount of water vapor compared to what would be present if open to the atmosphere via leaks.

And of course I dry that small amount of air with desiccant in the chamber, as well as the fact that the ac unit also acts as a dehumidifier.
post #64 of 118
http://www.confortgeothermique.com/en/systemes/

this give the idea!water go in the channel in the earth!(usually 300 feet deep)then come back the other way carrying a few degree more then when they went down!this is what keep a lot of home warm in winter in lot of place in the world.

not sure here but i think instead of cooling your system it looks like you are basicly warming your cpu,if i am right yest the air around would be cool but the cpu would be warmed by water coming from the radiator!wow if i am right !i didnt event think this could be possible lol!

only thing i can see that would cause this is if your radiator is too low compared to cpu!i am sad to say you might need to put radiator higher!the higher the better i suspect!

i am probably wrong tho ,this doesnt make sense at all!
post #65 of 118
Quote:
Originally Posted by drbaltazar View Post

http://www.confortgeothermique.com/en/systemes/
this give the idea!water go in the channel in the earth!(usually 300 feet deep)then come back the other way carrying a few degree more then when they went down!this is what keep a lot of home warm in winter in lot of place in the world.
not sure here but i think instead of cooling your system it looks like you are basicly warming your cpu,if i am right yest the air around would be cool but the cpu would be warmed by water coming from the radiator!wow if i am right !i didnt event think this could be possible lol!
only thing i can see that would cause this is if your radiator is too low compared to cpu!i am sad to say you might need to put radiator higher!the higher the better i suspect!
i am probably wrong tho ,this doesnt make sense at all!

You are not understanding the principles behind his setup. He has taken apart an window air conditioning unit, and he is utilizing the condenser portion to cool a custom enclosed chamber. The condenser is capable of cooling the surrounding air by a thermal transfer in the condenser unit which is filled with a refrigerant that removes heat from the air by evaporation (similar to how sweat cools your skin). The chamber is filled with cool air that is circulated within a closed sealed chamber which in turn cools the components within the chamber .

This is similar to how a refrigerator cools your food, the main difference is that this system is sealed shut when in operation, which helps to eliminate moisture. The desiccant in the chamber helps to remove the remaining moisture by absorbing it with a hygroscopic substance.
post #66 of 118
Thread Starter 
I've just been toying with some over clocking.

Got my aged Q6600 up to 3.74GHz seems stable on prime although not run for half long enough and hitting a temp of 20 Deg C max...not bad for air cooling ...lol.... wheee.gif

Think there's more to go yet, I'm no where near an expert at this, think I'm being restricted by the ram, I've got all 4 slots populated 8GB, am I correct in thinking if I took 2 out I'd be able to push it further?
I've got it on the lowest strap to the cpu frequency but its not the fastest ram in the world anyway.

I'm so stoked with this, never thought I'd be running my pc in a -25 to -21 deg C environment. Once I've played with this for a while and I'm 110% sure its all good I'll upgrade.
Edited by technogiant - 7/2/12 at 1:59pm
post #67 of 118
Awesome project, very interesting, great pictures!
You're going all out, not just pumping air from AC unit into case, a truly integrated AC case. You sir, are awesome smile.gif
post #68 of 118
20 c?so basicly your limit isnt the temperature but learning how to set your computer up for higher speed?hahaha you are on your own there lol!most are at around 3.8 or 4 stock !from what you say your system (once you upgrade)will probably be stable at 5 (not overclocked,even tho if technicly intel will consider oc)for you an oc will probably 6 ghertz or more!hahahaha
post #69 of 118
Thread Starter 
Quote:
Originally Posted by drbaltazar View Post

20 c?so basicly your limit isnt the temperature but learning how to set your computer up for higher speed?hahaha you are on your own there lol!most are at around 3.8 or 4 stock !from what you say your system (once you upgrade)will probably be stable at 5 (not overclocked,even tho if technicly intel will consider oc)for you an oc will probably 6 ghertz or more!hahahaha

Q6600 default or stock if you prefer is 2.4Ghz
Edited by technogiant - 7/2/12 at 1:55pm
post #70 of 118
Thread Starter 
Quote:
Originally Posted by Mattb2e View Post

I do not think you understand the premise of the bag. Correct me if I am wrong OP, the bag is being used for pressure equalization and leak detection.
Additionally the OP has been monitoring for condensation from the beginning. After he had noticed that he had some, and it was suggested to get some desiccant, minimal condensation has been present since he introduced his desiccant into the system.

Your absolutely correct, glad some people are getting me...lol

Yeah it was either the desiccant or using a higher clamping pressure on the lid solved it......I can just leave it sealed now and let the desiccant do its job.....the balloon isn't going down at all that I can tell....I may even try pumping it up to a higher pressure.....that would increase the air density and so improve cooling....don't know if it would be an appreciable improvement though.
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