Liquid cooling a P7.

[n4zou]

I have read about how hot the P7 gets when driven to full output so I'm considering liquid cooling. Should be simple enough. Just solder 1/4" copper tube to the copper sheet metal heat sink. I don't want to use a pump to move the coolant around. I think just having a small copper tank with cooling fins like a standard heat sink using the natural rising flow of heat would do it. Of course the tank would be mounted above the LED. Thoughts and comments?

 

[znomit]

I dont think its needed. You get a lot of cooling while riding. If you are looking at something really small you will need some finning. Non of my lights get anything near hot while riding, even my tiny triple curtain rail at 1A (11w) just gets warm (yes the forced air cooling probably helps). By the time you include a water tank things are getting relatively huge.
The key is to mount the LEDs directly to the housing so the heat has a direct path out to the air.

BTW, P7 is old news, cree were kind enough to design a chip especially for us dyno guys, who need the dies in series (p7 is parallel).
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