Fanless Heatpipe CPU Cooling System

[notoriousformula]

This fanless CPU cooling project is an exercise in logical design and simple execution using available technologies. But it is far from simplistic. Fred Mah's fanless heatpipe cooled CPU system shows us a new approach to integrated system design that opens up all kinds of interesting possibilities. The cooling power of his system is nothing short of impressive, able to tackle the fastest and hottest XPs without a fan. It could easily be adapted for any CPU type and ramp up for even higher cooling power. A very cool system, indeed."

Pics/Article/Test results: HERE (http://www.silentpcreview.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=114&page=1)

[dicki]

now i like that idea, neat and tidy, cracking solution... i bet that would work really well in a lian li or something using the entire case as a heatsink... just waft air over it and your done!

dicki

[State Change]

This is a fairly detailed exercise which shows more than a passing interest in passive CPU cooling but why the copper block fabrication and use of commercial heat pipes unless you want to build a passive device you can market which the guy at home can't build for himself? Without the fancy heat pipes a passive device is easy to build. You do have to know the equations.

One merely determines the area of the heat sink necessary for dispersion in zero flow air. The bridge to the CPU is next.

With plenty of ceiling (4 inches) above the motherboard one might simply use a solid block of aluminum 50 mm square (a Pentium I) for the bridge to match the radiant surface area of the CPU and bridge the gap between the CPU and the heat sink.

Why bother fabricating copper plates (although copper is almost twice as heat conductive as aluminum) or use heat pipes? A 4 inch by 50 mm square solid aluminum bridge conducts nearly 168 watts or 564 BTU per hour at 130F CPU to 70F ambient.

Attach the ambient side to the heat sink (fins on the other side) and no fan or heat pipe is needed.

[State Change]

Originally posted by State Change
This is a fairly detailed exercise which shows more than a passing interest in passive CPU cooling but why the copper block fabrication and use of commercial heat pipes unless you want to build a passive device you can market which the guy at home can't build for himself? Without the fancy heat pipes a passive device is easy to build. You do have to know the equations.

One merely determines the area of the heat sink necessary for dispersion in zero flow air. The bridge to the CPU is next.

With plenty of ceiling (4 inches) above the motherboard one might simply use a solid block of aluminum 50 mm square (a Pentium I) for the bridge to match the radiant surface area of the CPU and bridge the gap between the CPU and the heat sink.

Why bother fabricating copper plates (although copper is almost twice as heat conductive as aluminum) or use heat pipes? A 4 inch by 50 mm square solid aluminum bridge conducts nearly 168 watts or 564 BTU per hour at 130F CPU to 70F ambient.

Attach the ambient side to the heat sink (fins on the other side) and no fan or heat pipe is needed.

[Drake]

:D:DWELCOME:D:D to Liquid Ninjas, State Change!

Glad to have you aboard and posting :)