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Most Likely a Stupid Idea

U

UnphasedData

Limp Gawd
Joined
May 31, 2005
Messages
210
Okay a Computer Chiller (made with a ice chest and a modified A/C unit) chills water which is then pumped into a watercooling system correct?

Well why couldn't you have a A/C unit pump air into a ice chest and have the computer assembled inside the ice chest. The computer would run of air but the temperature of the "room" would be like 40 degrees Fahr or so. Just not worth it?
 
Comme ca?

http://www.vapochill.com/main/page.asp?sideid=402

...or more like it's actually built in the fridge?

Effectively with the Asetek thingy, they're pumping the A/C directly in to the computer case. All you're talking about is mounting the case in something else and then blasting it woth A/C goodness?

If so, plausible but expensive I would imagine.
 
Kinda...I was thinking of having the case chassis sitting inside of a mini fridge.

Also could I just have a fan pumping air out of my mini fridge and directly into my PC via a duct? The air would be coming from the freezer section only. I dont actually want to do watercooling, I can deal with the upkeep and maintenance at the time, but this way I could have 25* Fahr air being pumped into my PC and then having the temperature maintainted by aircooling.
 
Condensation is not a problem on the inside.
Cold air is dry and when it warms up it can hold even more water vapour, so stays dry.
Warm air can be damp, so when it cools down it can hold less water vapour, hence condensation.

So putting a computer inside an insulated box (fridge) and pumping cold air in will work.
You may even get a better overclock as you cool everything ram, mosfets, PSU, etc not just the CPU.

Then its a question of do you build an open or closed loop system.

ps. A mini fridge will not be able to handle the heat load.

Luck.......... :D
 
Okay what I want to do is have the air in my mini-fridge's freezer being pumped into the bottom of my case from the side towards the front. How do I get the air out of the freezer? Can I just cut a hole in the side of the fridge (properly cut it and have it sealed/connected to duct) and then just have a fan pulling the air out of the freezer and through the duct then having another fan on the PC pulling the air out of the duct and into the case? So

[FREEZER]*=======*[CASE]*>>>>>>
>>>>>>>>

* is a fan
= is ducting
][ are the case and freezer sides.

So the air would go down the duct and into the case via intake fans and then exit the case via an exhaust fan. Would this work and would it be worth it? I mean its not going to cost me much at all, I've got the mini-fridge and I can buy some ducting for cheap. Fans are laying all around.
 
Tigerbiten said:
Condensation is not a problem on the inside.
Cold air is dry and when it warms up it can hold even more water vapour, so stays dry.
Warm air can be damp, so when it cools down it can hold less water vapour, hence condensation.

So putting a computer inside an insulated box (fridge) and pumping cold air in will work.
You may even get a better overclock as you cool everything ram, mosfets, PSU, etc not just the CPU.

Then its a question of do you build an open or closed loop system.

ps. A mini fridge will not be able to handle the heat load.

Luck.......... :D
Click to expand...

interesting point with the fact that it would cool every thing... how big a problem would the cycleing of the unit be??? if the fridge cycles off, and the pc heats it up to fast, would there still be a problem?(or do it have it backwards??? in which case it still applys, only it would be the same question, to the effect of, after it has cycled off, and comes back on... )

ehh... if i remeber correctly it has been done... the plus side to this would be the fact that you could stock the fridge with munchies and drinks.... and never have to get up.... :D

thore
 
Haha ya, but I would just run the PC only as hot as I could with the fridge already being cycled. I dont want any extreme cooling here. I just want some cool air flowing in, and since the air in the room isnt anywhere near cool (Texas Heat) I would just like that freezer air (which I dont use) to be pumped into the PC. I dunno yet, I'll see if anyone brings up any potential issues.
 
UnphasedData said:
Okay what I want to do is have the air in my mini-fridge's freezer being pumped into the bottom of my case from the side towards the front. How do I get the air out of the freezer? Can I just cut a hole in the side of the fridge (properly cut it and have it sealed/connected to duct) and then just have a fan pulling the air out of the freezer and through the duct then having another fan on the PC pulling the air out of the duct and into the case? So

[FREEZER]*=======*[CASE]*>>>>>>
>>>>>>>>

* is a fan
= is ducting
][ are the case and freezer sides.

So the air would go down the duct and into the case via intake fans and then exit the case via an exhaust fan. Would this work and would it be worth it? I mean its not going to cost me much at all, I've got the mini-fridge and I can buy some ducting for cheap. Fans are laying all around.
Click to expand...

you would cool the pc, but you will mostlikly break the fridge, the thermo stat is usually located in the fridge part, and not in the freezer, haveing the cold air from the freezer ducted out would mean no cold air is getting to the bottom, makeing it run 24/7 (or for as long as you had the fridge pluged in) also, in order for the fans to have something to pull from, meaning you would have to build a air intake into the fridge somewhere.... (defeating any point...)puttting an air intake in the fridge will introduce lots of mostiure into the system, and the coils will frost over... up to several inches thick, and reduce the systems effectiveness considerably, and mostlikely to the point that you burn up the compresser. if you want to do something like this you would be better off going water cooling and putting the rad in the fridge.... (also been done)

thore
 
Oh and the CPU and all that would still have a heatsink/fan and what not. I'm not trying to use the air to directly cool the components. I just want to provide cool air via ducting to the fans/heatsinks that are already there. Kind of like when I take the side off my case and aim a fan into the case and I get 5* C temperature drop. If I use a frozen block in front of the fan I can get a 8-12* C drop in temperature. I figure I can get 15* C overall case temperature using 15* F air from the freezer.
 
UnphasedData said:
Haha ya, but I would just run the PC only as hot as I could with the fridge already being cycled. I dont want any extreme cooling here. I just want some cool air flowing in, and since the air in the room isnt anywhere near cool (Texas Heat) I would just like that freezer air (which I dont use) to be pumped into the PC. I dunno yet, I'll see if anyone brings up any potential issues.
Click to expand...

in the minifridges, the freezer is the fridge, the air just passes over a shelf , the reason things freeze up top is because they are usually in direct contact with the coils, or at least very close to them depending on the model

thore
 
Crap I knew I forgot something...there would have to be a source of air to replenish the air in the fridge. Alright nevermind...watercooling it is for now, and later I'll chill it. Thanks!
 
UnphasedData,

You would need to cut an "Intake" hole in the "Freezer" as well or no air would come out of it. Once you do that, the hot air coming into the freezer to replace the air your pulling out of it would raise the temperature inside the freezer and you would get alot of condensation. Not to mention that the freezer would probably give out from overworking trying to constantly lower the temp.

You would have to simply put the whole computer into the fridge so thet the fans would simply be recirculating the same cold air although, as stated by another poster, it would again be hard for the fridge to keep up with the constant cooling of the heated exaust air. Refridgerators don't run all-the-time. They lower the temp and then "Stand-by" until the thermostat tells them it's time to cool things down again.

The best way to use refridgeration in cooling would be to use some sort of airconditioning unit to duct cold air onto a "Heatsink" of some kind that is slightly remote from the rest of the computer.Sort of an extra long "Heatpipe" style like found on the "Northbridge" of an "Abit AN8" style motherboard.

Just my 2 cents ;)

\\//_
wizzard0003
 
Okay wait, why cant I have hot air from the case ducted back into the freezer? This would create a closed loop and the freezer would still have a certain volume of air circulating.
 
Wouldn't that just like double the size of the fridge's air space? I would probably burn out the fridge but this thing is old and if it goes out I'll purchase a new one eventually.

Also I've got one of those big open top freezers could put the whole fricking computer inside of it? Would condensation be a problem? Are some parts sensitive to cold?
 
UnphasedData said:
Okay wait, why cant I have hot air from the case ducted back into the freezer? This would create a closed loop and the freezer would still have a certain volume of air circulating.
Click to expand...

your box would sweat like madunless you insolate it like mad... at witch point.. you might as well put the whole damn thing in the fridge....

as for putting it in the freezer.... im not really shure if there would be any isses with it or not... im trying to figure that out my self... i assume it would only be a problem when freezer cycles off, as it should produce condensation... but in a closed inviroment, it may not, the moisture may just freeze in the freezer nad not really be a problem, untill you take the box out to change something, then the box will sweat like mad... and it will not just be the case itself but rather every thing harddrives, cpu gpu... the whole mother board ingeneral... every part will sweat the seconed you let it heat up.... i have a feeling harddrives wont like this much (contrary to popular beleif, they are not air tight, they are filtered to keep dust out, but mostiure can still get in if the conditions are right... (and this would be right))

so if any one thing is keeping you from being able to do this, it would be the harddrives... i know theres is a water proofing spray you can buy for electronics, that is good for every thing except the connectors(chanses are the cards wont work if this stuff gets on the edge connectors... you would have to figure out a different method to protect them...)

thore
 
Okay done some reading. The airconditioning via the freezer wont work for several reasons. It could be done, but too much trouble. HDDs/PSU/CD-DVD drives should all be outside the cooling environment. As long as the environment is sealed it wont sweat or produce condensation. Put ur computer in the freezer, turn on the freezer, let it get cold, then when you want to remove it you turn off the freezer, the contained environment will not produce condensation (no source of moisture) and once it reaches room temperature (after awhile) you can open it up and remove parts with little to no condensation. Plus ur parts should only fry if they have an electrical current running through them while wet. Unless the components store some electricity...this is way too complicated, but I've decided just to go with watercooling for now and I will eventual have the freezer chill my watercooling (maybe).
 
yup.. thats basicly what i was trying top get at in the first place... just not worth the effort....

thought after giveing the some thought, you could do a dubble rad set up, one of the rads in the freezer, the seconed in the case, pump>rad(freezer)>cpu block(ect)>rad (case)>res>pump... (you may want to swap the cpu blocks and the case rad... not shure... the trouble with running a freezer mad is now you will HAVE condensation... it will drip off of what ever is cold and not in a sealed inviroment... how ever, if you put the case rad infront of the blocks it will be the coldest, and most of the condensation should form there, and it would for the most part be away from the componets, nad you could get the water off of it fairly easly, haveing the seconed rad in the case, would allow you to pull cold air out of it and blow it all thoguht the case...

still gonna be alot of trouble.... but it would be cool to see... im not shure if this one has ben done or not

thore
 
Tigerbiten said:
Cold air is dry
Click to expand...

Dalton's Law of partial pressure


Dalton's law is particularly useful when thinking about humidity. It says the total pressure of a gas is equal to the sum of the partial pressures of each of the component gases:

Ptotal = P1 + P2 + P3 . . . + Pn

Water vapor pressure: Temperature dictates the maximum partial pressure of water vapor. This maximum pressure is the saturation vapor pressure. The higher the temperature, the higher the saturation vapor pressure.

Thus, warm air has a greater capacity for water vapor than cold air. If saturation vapor pressure has occurred in air or a gas mixture, introducing additional water vapor requires that an equal amount of water vapor condense out of the mixture as a liquid or solid.

A psychrometric chart graphically relates saturation vapor pressure to temperature. Vapor pressure tables also enable one to look up the saturation vapor pressure for any temperature, and of course there are a number of water vapor calculation programs available for PCs.
Click to expand...

emphasis mine, not quite the same as saying its dry, it is relative
and of course opening the enclosure with cool components and admitting warm moisture ladened air to hit it....
a point everyone already tumbled too

psychrometric_chartsmall.gif


another one

hotdry.gif


the full article is well worth getting your knoggin around
understanding pressure, temperature and relative humdity and how they interact will pay off in the long run, especially in extreme cooling. ;)
 
UnphasedData said:
Conducts electricity...have to dilute the ketchup with...some sort of coolant...lol
Click to expand...
but then you couldnt open it up and dip your fries in it during lan parties
 
Dark_fire said:
but then you couldnt open it up and dip your fries in it during lan parties
Click to expand...

Well you could, but it would be all wattery and poopy
 
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