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What happened to bong coolers? - Page 2

post #11 of 19
Quote:
Originally Posted by technogiant View Post

Has anyone ever tried to enhance the evaporative cooling of a bong or volenti?

I was thinking by using a mix of methanol and water, the methanol would evaporate much more easily than the water and so cause lower temps.

You'd have to enclose the vapor space and re-condense the vapor using a dual rad loop......just a thought.
now you are talking about a refrigerator on a basic level. make sure you watch the water levels if you let it all evaporate out your pump will run dry and your pc will fry. post pics if you do it
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post #12 of 19
As the vapor space would be sealed then loss of coolant shouldn't be a problem, though it would be easy enough to put a viewing window in the chamber or an external fluid level tube to keep an eye on it.

It's not something I'm considering atm.....I've got bigger fish to fry:-

http://www.overclock.net/t/1346823/subambient-2-phase-submersion-cooled-pc

....but maybe one day.
Edited by technogiant - 4/24/13 at 10:13pm
post #13 of 19
 
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post #14 of 19
Quote:
Originally Posted by technogiant View Post

Has anyone ever tried to enhance the evaporative cooling of a bong or volenti?

I was thinking by using a mix of methanol and water, the methanol would evaporate much more easily than the water and so cause lower temps.

You'd have to enclose the vapor space and re-condense the vapor using a dual rad loop......just a thought.

Well it might work, have to be sure that your tubing is ok with alcohol. Would probably be cheaper in the short run to let the ethanol evaporate into the atmosphere. Building a rig to capture and recondense the vapor will add to cost, size and complexity of the rig.

re. 15C below ambient.... that would be one amazing evaporative cooler. I've seen 15 F below ambient on mine, never 15C.
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post #15 of 19
Quote:
Originally Posted by Faster_is_better View Post

That was an interesting read.

I agree. At first i was like okay im just going to just skim through this.... "wait.... what are they doing" Interesting enough to read the whole thing.
post #16 of 19
Quote:
Originally Posted by nub View Post

Well it might work, have to be sure that your tubing is ok with alcohol. Would probably be cheaper in the short run to let the ethanol evaporate into the atmosphere. Building a rig to capture and recondense the vapor will add to cost, size and complexity of the rig.

re. 15C below ambient.... that would be one amazing evaporative cooler. I've seen 15 F below ambient on mine, never 15C.
oops, i'd just been reading degrees, hoping you guys were meaning Celsius. so correction: 10 degrees Celsius
post #17 of 19
Quote:
Originally Posted by nub View Post

Well it might work, have to be sure that your tubing is ok with alcohol. Would probably be cheaper in the short run to let the ethanol evaporate into the atmosphere. Building a rig to capture and recondense the vapor will add to cost, size and complexity of the rig.

re. 15C below ambient.... that would be one amazing evaporative cooler. I've seen 15 F below ambient on mine, never 15C.

Yeah that would be a nice cheap idea to do a proof of concept test......the only problem being that not only would you be venting a highly flammable alcohol/air mix but that would also be present in the volenti/bong chamber.....even though the fans are brushless and so hopefully spark free just the vapor movement can build up static electric which could be an ignition source....so it would have to be a quick test run outside viewed from a distance...lol

Ultimately the vapor space would have to be sealed and saturated to prevent ignition.
post #18 of 19
the only way evaporative cooling can get sub ambient is by venting the heat to atmosphere.
Closed evaporative cooling without a compressor does exist, it is called a heat pipe.
ignition of alcohol fumes should not be an issue then as ethanol would not build up / become concentrated. I doubt that alcohol added in small quantities would make much of a difference in evaporation rate / loop temperatures.
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post #19 of 19
Quote:
Originally Posted by nub View Post

the only way evaporative cooling can get sub ambient is by venting the heat to atmosphere.
Closed evaporative cooling without a compressor does exist, it is called a heat pipe.
ignition of alcohol fumes should not be an issue then as ethanol would not build up / become concentrated. I doubt that alcohol added in small quantities would make much of a difference in evaporation rate / loop temperatures.

Think you've misunderstood, although the vapor chamber would be sealed the vapor would be cooled to ambient by a dual rad closed loop quite separate from the pc/cooler circulation. one radiator inside the vapor chamber and one outside connected by an isolated water loop....so the vapor in the chamber would be re-condensed internally as the vapor temp would be kept close to ambient.....so sub ambient temps would be possible in just the same way as with a norm bong/volenti cooler.......probably lower temps because of lower boiling point of the ethanol.

I wouldn't be so sure that the alcohol would not reach flammable limits within the chamber if ventilated as normal.... 3% is the lower flammability limit for ethanol vapor....the other problem with having this open as you suggest is that you would have to be constantly topping up with expensive ethanol to replace that lost to evaporation.

I was not considering adding alcohol in small quantities, you could use pure alcohol inside the chamber....although you would have to be aware that if you pumped this directly though your component cooling loop that it has lower heat capacity than water.... you could overcome this by having your cooling system on a separate loop with a rad submerged in the bong/volenti reservoir....but you may actually be able to find a balance point at a certain % of alcohol/water that would negate the need for a separate component cooling loop to save on complexity/expense as you may well find you'd have to use antifreeze/alcohol in the component loop anyway to prevent freezing.
Edited by technogiant - 4/28/13 at 4:34am
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