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From: "Mark Hathaway"
Subject: Re: modeling a water cooling system
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Date: Thu, 24 Oct 2002 21:46:24 +1000
NNTP-Posting-Date: Thu, 24 Oct 2002 07:36:50 EDT
I have a complete metal workshop, I'm planning on copper water blocks.
What I'm curious about is will a water additive (corrosion inhibitor) be
conductive enough to cause trouble?(assuming unisolated mosfets mounted to
the copper blocks)
"Gary" wrote in message
> Mark Hathaway wrote:
> > Howdy people,
> > I'm in need of some help in modeling a water cooling system I'm mid
> > way through designing. The system will be used to cool four audio
> > amplifiers.
> > see here: http://www.passdiy.com/pdf/sonofzen.pdf
> > Each amp will have about 700 watts of heat to be dealt with. Water
> > cooling is the only way, ambient temperatures get too hot in
> > Australia for 1) comfortable room temperatures with ~3kw of heat and
> > 2)heatsinking to keep mosfets and resistors in their SOA assuming an
> > ambient temperature of 30-40 deg c is just out of the question, so
> > water cooling it is.
> > Where I'm stuck is data for how much heat a small car intercooler or
> > motor bike radiator could move assuming fan forced air with the
> > usual large computer power supply style fans.
> > Looking at a commercial heat exchanger example
> > http://www.thermacore.com/heatex_lahx.htm shows watt/deg c numbers
> > that I'd never imagined before. Where the data falls down is how
> > much air flow and water flow is required for such high watt/deg c
> > numbers.
> > Ideally I'd like to use a decommissioned car intercooler or two (or
> > motor bike radiator, would like to keep it aluminum). Anyone able to
> > point me to data or examples of achievable deg/c numbers for such a
> > heat exchanger?
> > Thanks for your effort,
> > Mark Hathaway
> Mark, water blocks for your system would have to bee customed made.
> Cold plates with peilters is another route you could test to cool the
> water blocks coolant other than just a radiator.
> Regards and God Speed,
> The Magic is in the Magician not the wand!
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