Which reminded me that this principle is the same one behind heatpipes... they are liquid-filled tubes which rely on convection only to move the fluid.Quote:
Originally Posted by RVWinkle
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Which reminded me that this principle is the same one behind heatpipes... they are liquid-filled tubes which rely on convection only to move the fluid.Quote:
Originally Posted by RVWinkle
You are correct that they both use convection but that wikipedia article makes sure to note there is a difference. Heat pipes rely on evaporation and condensation.Quote:
Originally Posted by AndrewZorn
Some OC tests, quite pleased with these as checking the Intelburntest thread im matching what some are seeing with highend air cooling.
10 Loops intelburntest, 1.4V set in bios although actual vcore is well below this.
http://www.ocztechnologyforum.com/st...convection.png
Ambient room temp is 20C, air out of rad(top) 34C, bottom 24C, so rad is removing 10C ish as the water flows down each pass.
not bad at all
wow it even handles an overclocked quad core!!
amazin
good work tony!! :up:
no fans?? and if fans how many and at wich rpm??
I love you Tony. :kissbutt::smileysex::bows:
Edit: What you have "discovered" is called thermocycling. Used to great effect in solar thermal heating."
Quote:
Originally Posted by Tony
There have been others that have played with convection... seems to work best with the radiation above the loop, in fact, you may have a disaster if it is not. I know Cathar played around a bit with convection for a while.
Xilence fans, 55ish CFM at 12V, just 3 on one side of the rad. The fans are silent...just wind noise from 6" away is all you can hear...go 3 feet and you would not know they are running.
The rad has to go topside or you use a crossflow rad with the top barb on a 30deg angle upwards of the top barb on your block.
I would not push the processor much more than this with a rad inside the house, for more i would drill 2 holes thru the wall and mount the rad outside and let the cool British winter do the cooling for me ;)
I may try a phenom next, see how they do as im thinking 790GX for my HTPC, if similar to this im done with pumps ;) LOL
Very cool Tony. Reading this I think I'm going to experiment with an old s939 system I have in a box here, and putting a Winchester 3500+ in a loop consisting of a TDX block and a Black Ice Pro 2 with a bit shorter tubing and alternative radiator positioning. This old dog might even put out more heat than that q9650 of yours, at least in idle, heh.
the block design is important, i think the hydroflow suits convection real well where some other blocks would not do quite as good a job. Its always nice to play and test though ;)
Yes. Phase change.... if you will ;)Quote:
Originally Posted by RVWinkle
Tony, I'm going to Manchester to steal your gear and .... and your job. Too much fun for one man to handle on his own. :D:D
i read this thread a few hours, and was thinking about how theoretically you'd want a insulated 'hot' pipe that went directly up several metres to a radiator with a several metre long 'cold' pipe coming back to the CPU block to get the max pressure (and thus flow rate) from your hot/cold liquids
but i just read this paragraph in wikipedia http://en.wikipedia.org/wiki/Radiator#Coolant_pumps, seems that might not be the case
umm, yea just posting in case you have similar thoughts :wave:
very interesting thread :yepp:
in a case I would insulate the hot pipe so that you do not allow the heat to increase the case temps...you want the heat transfer in the rad not the case ;)
Im actually going to do this with my brand new V2000 (awesome case why did they drop it) for my new HTPC, I will go with a 3fan tripple crossflow rad mouned off the back of the case and use copper piping internally to within 2" of the block where i will change to plastic flexy tube... I am hoping to hard plumb the rad though if I can. Bomb proof install is what I am after.
If the crossflow has issues I will just add another rad using a standard tripple I have here horizontally mounted on top of the case and alter the pipework to put both the rads in series with the rad on the top being first in the loop.
I may do this anyway and run dual loops, with chipsets and video on the second loop, I have a feeling it would match stock Video card cooling even just convecting.
interesting thread.... its great to see someone experimenting
it seems that the thermosyphon would work best with a greater temperature differential... I dont know much about watercooling tecs, but that would boost the water temp while maintaining lower cpu temps... might have to watch out for tube meltdown tho :D
If you read back I already have tried that but not documented it here. I actually used a 15V tec on 5V fed off a molex line which was pumping around 50W. if I could get one to do 60W at 5V that would do fer the quad at stock speeds on the P45.
ahh ok... i missed that
what coolant temp did you get?
Ooo-Kaayyy ... :hm:Quote:
Originally Posted by Tony
tony if you have time,
can you possibly try running your experiement though sections of regular copper tubes to see if that would help a little?
Maybe a series of 10cm of copper tubing in sections?
I know it would sound dumb, but what is the point of not using a pump ? it makes less noise than a 3 quite fans.
An MCP-655 set to speed=3 is inaudible and makes almost 0 vibrations.
For me it seems that using a passive rad will give better, am I wrong ?
other than that, I like that Idea Tony, I'm just not sure about it's benefit over passive rad with a quite pump.
in convection, your trying to get rid of the extra sources, not addon more.Quote:
Originally Posted by The-Fox
Adding a pump would eat your battery. The reservoir is like a battery of how your system can hold.
Anyhow, using the principles of warm water rises, and cold water falls, this is his main driving point in this whole experiment.
What i want to see tho is if adding small sections of copper tubing thoughout the loop could somehow compensate for tony's uber large 12 gallon res. :up:
There are quite a few advantages. First and foremost, no pump to fail. While low fans are nearly silent, this sytem would allow you to get the slowest fans and turn them down to be completely dead silent, while still blowing more than enough air to dissappate the heat. Would be ideal for a HTPC. Plus, it's cool as hell. :DQuote:
Originally Posted by The-Fox
Axis
interesting read. I wonder how this kind of loop would perform in hotter (30C+) weather? If I ever try building a loop like this I'd like to be sure it survives Australian summers...
The rad tests featured 1/2L water and 3ft of tube total...no huge res :)Quote:
Originally Posted by NaeKuh
Copper tube is interesting though, 1/2 would be key me thinks, I may do this on the HTPC and server im about to move to pumpless stytems.
best part is at idle you do not need fans, using speedstep you should see 10W or less on a quad at idle...so no pump and no fans, add SSD drives and with the right vdeocard/psu cooling you could have total silence.Quote:
Originally Posted by axis
If the rad was turned on its side it may create a convection current of air through itself on its own negating the need for fans completely.