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Old 5th June 2003, 12:02 AM   #1
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Default Looking for input on watercooling

Yes, yes, i know this has been brought up a gazillon times, but bear with me. I've been looking arround for new sinks and found some rather nice ones... as always, at an insane price. The water cooling idea came to me again after doing the math. Has anyone actually BUILT an amp using it and can tell me:

- Where to get the radiator / pump. Prices would be nice Can they be found second hand?
- Ammount of noise generated
- Problems with leaks, water clogging?

Etc etc. Basically, what i'm looking is for encouragement (or not) to try this way. It all boils down to money; i want to build my JLH in a final form so it'll last me for a while. But i'm a studient and money is scarce...
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Old 5th June 2003, 12:20 AM   #2
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Default look for the overclockers

The computer overclockers seem to be doing your advance work for you. I don't remember where, but I saw a water cooled kit rated at about 400watts for around $100 us. This one seemed to have pretty good parts and the cooling block was very well put together. So I think that it is possible to do better than that. Fishpump, heater core from a car, plastic tubing and clamps take care of most of it. Perhaps build a temp controller to turn on a fan, if needed.

I have not seen the perfect water block yet - I suspect if I had, I would have tried this by now. I think for audio we need more mounting space and other methods for mounting differing semi types.
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Old 5th June 2003, 12:56 AM   #3
Fusor is offline Fusor  United States
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Heat pipes appeal to me more than active water cooling.
http://www.benchtest.com/heat_pipe1.html
This gentleman does excellent work, but he scares me. Water cooling a switching power supply:
http://www.zerofanzone.co.uk/content...uidenermax550w
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Old 5th June 2003, 01:18 AM   #4
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Heat pipes are a neat idea but imho they're even a bigger hassle than wc blocks. My idea was to shape an aluminum block to route water through it and hold all the devices, using a cheap fishpump and a surplus radiator (car ones are very very cheap, specially for old models, but the thing is to find something useable, like, say 20x20cm)... dunno, i figured someone might have already tried

I've checked the overclocking scene too; the thing is that those things are either impossible to find here or so overpriced that's no good either.
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Old 5th June 2003, 04:26 AM   #5
Variac is offline Variac  United States
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Grey Rollins runs his Aleph water cooled. I think the title of the thread was Water Cooled Aleph. He came up with a cheap and good way to mount the output devices - a 1/8" thick strip of copper with a piece of copper pipe soldered along one edge, leaving the face for mounting the transistors. Most aquarium pumps are air not water? The are surplus water pumps around. at the usual surplus sites
Transmission fluid coolers and heater cores from cars are the cheapest and most available radiators. Grey didn't even use a fan
on hte radiator. His was from a house heat pump. No problem with algae or corrosion despite lots of naysayers claiming there would be a problem.
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Old 5th June 2003, 05:21 AM   #6
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Humm....

Yeah a water block wouldn't be too hard, you just need a mill and drill press...
If you want to do a fab instead, brazing would really be better.. I don't think you need brass, with something that big it would be hard to get it hot enough anyway... phos copper I hear melts lower so would probably be great.

Dang.. now I feel like building something... anyone want cast aluminum watercoolers?

Tim
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Old 5th June 2003, 07:43 AM   #7
Bricolo is offline Bricolo  France
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I have some experience with watercooling; but only on computers, never tested on an amp

It works really good, that's for sure!

But keep one thing in mind: watercooling isn't magic, it doesn't "eat" the heat. It's only a way to transport this heat from the waterblock, to another point (the radiator) that has to evacuate all the heat from the waterblock.
That's usefull when you haven't the place to put a big heatsink directly on your heat source (like a computer CPU in a computer box)

But with amps, we have much more place to put big radiators directly on the case, so watercooling is not so usefull.
Except if you live in sibery ant that you want to place your 5.1 Aleph2's radiator out of the window
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Old 5th June 2003, 08:14 AM   #8
edm is offline edm  Netherlands
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Perhaps a real stupid idea, but in stead of using a (car) radiator would it be an option to transfer the heat to your excisting heating system from the house.

For a car radiator you need a vent to effectively transfer the heat to the air. Using the excisting home heating system you would have a massive cooling area, with plenty of water and ofcourse i pump is present to pump it around. So the system I see is to have a small watercooled block, which transfers its heat to a larger block attached to the home heating system.

Or perhaps an even simpler idea is to mount the transistor to a slab of aluminium, which in turn is directly mounted on one of the heaters.

Probably both ideas don't work, but at least the former idea should be relatively easy (and cheep) to try.

O and please shoot some holes in my idea, because everytime i see these watercooling things on the OC-forums i wonder why 'my idea' is not applied.

emiel

ps1) To be clear i have attached i picture of the kind of heaters I mean for a home heating system (it will not work with these hot air systems or others).

ps2) Ofcourse the heat transfer from the cooling block to the home heater is not optimal (especially if they are painted), but this can be optimized
Attached Images
File Type: jpg cv-heating.jpg (23.3 KB, 241 views)
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Old 5th June 2003, 08:32 AM   #9
Variac is offline Variac  United States
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EDM,

Your idea would work if the heating system isn't being used for heating. If it is heating, the temperature of the heater will be about the same as the waterblock I think,so no heat transfer.

We call the thing mounted on the wall a radiator also (the same word as the one in a car)

So, if you found another house radiator and hooked just it to your amp water block then you have an excellent cooling system for your amp that matches your house heating. You probably would need a (small) electric pump to move the water though.
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Old 5th June 2003, 08:55 AM   #10
edm is offline edm  Netherlands
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Variac,

Thanks for the termology, it was already my guess that it would also be called a radiator, but perhaps abroad other ways of heating are more popular. So for absolute clarity the picture (a picture tells.... )
But now for your remark that it would not work if you are heating... Well i don't know how warm you like your house, but I like it not warmer then 18 degrees C. So I would be most suprised that the wall radiator would be hotter then the devices to be cooled, so perhaps efficiency should be worse but i envision it would still work, no? And basically you are helping the central heating so probably that will works in your advantage, since the thermostat will shutdown the main heating device sooner...

But what about the second idea no waterblock no additional pump, just hook it up directly to a pre-excisting radiotor. The pump of the central heater will take care of the water flow (at least mine is pumping even though it's not heating) and of you go..

Emiel
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