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Team RCC's Heavyweight Bullfrog.
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maddox



Joined: 21 Dec 2006
Posts: 786
Location: Belgium


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Not using water , but a non electrical conductive, no corrosion promoting liquid.

For weight. Take a 10 kg fine finned piece of ali, and you still get about half of the heat transfer/sink capacity of our 1 liter liquid heatsink.

Post Thu Aug 18, 2016 7:47 pm 
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Spockie-Tech
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Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia


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Mm, fluoronert or similair ?

You could immerse the whole ESC if you made the case fluid tight.. wirexs would be a pain though. And for intermittent duty equip like robot ESC's you dont need the constant radiating ability, just a 5 minute heat absorption capability.. as Im sure you know. Interesting.
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Post Thu Aug 18, 2016 9:47 pm 
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Nick
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW


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I think Mario is using the liquid heatsink to warm up the gas system, not cool down an ESC. It would be interesting to see if the system could do both things - attach a CPU cooler to the ESC and copper coils around the drive motors, then dump all the excess heat into the buffer tank or the ram. Very Heath Robinson, but fun Smile
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Post Thu Aug 18, 2016 9:56 pm 
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maddox



Joined: 21 Dec 2006
Posts: 786
Location: Belgium


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The liquid heatsink does 1 thing. Getting heat in the CO2 running to the buffertank, to avoid more chiil down and powerloss.

Post Fri Aug 19, 2016 12:36 am 
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Valen
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Joined: 07 Jul 2004
Posts: 4435
Location: Sydney


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I wouldn't want to run CO2 near the ESC's that sudden chill down would cause you lots of problems (+80C then -20C cycles may be bad). A block of wax or something with a ~30C melting point would perhaps put a bunch of heat of formation into the buffer without trying *too* hard, some heat pipes might be needed though
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Post Fri Aug 19, 2016 9:53 am 
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