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post #11 of 57
IBM thinks so. Read it, and while its not exactly what you are talking about its close. Any way the 3 biggest things that affect heatsink performance are how well the heat gets from the cpu to the heatsink (thermal paste or other), total surface area, and how well the material absorbs, conducts and gives off heat. copper is really good at absorbing and conducting heat, but not nearly good as aluminum at giving it off. Thats why we are seeing more of these hybrid Al/Cu towers now. There are other materials that are better than copper, silver for instance. Also an active heatsink is better than a passive, as the overall goal is to get the heat into the air. A fan will provide more cool air for the heat to go into, and it will get the hot air moving away form the heatsink.
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post #12 of 57
Quote:
Originally Posted by Peritus View Post
I'm not sure that I understand what design you are referring to by "pinned block"... but You are right, there would be blockage and it would be expensive to create....

Of course, you referred to maximum air flow... and this heat sink's function would be passive and omni-radiance... Not directional wind cooling... Hmmm...

However, they are good points, indeed

Thanks for your help
Oops i meant to say finned, not pinned. For a passive block, maybe it would be smart to have sort of a chimney over the cooler, whatever desighn it be, to create a natural convection effect from the heat rising, pulling cool air in from the bottom. I geuss for a strictly passive design, the tree idea should work pretty well, as long as the base/trunk of the tree isnt too tall. If its too big, it will obsorb alot of the heat, but wount have enough surface area to dissipate the heat fast enough, so the block will become saturated.
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post #13 of 57
The bifurcated fin design is already proven in radial heat sinks. i.e.:
http://www.frozencpu.com/products/14...40c14s52#blank

TT call's it "crotch finning"...but it's the same concept.

Also, Ira, check this out:
http://www.frozencpu.com/products/14...l?tl=g40c14s52


But, what you theorize is a much more elgant solution. The problem being HOW to get that formation synthetically. I wonder if you could grow it in a charged copper solution using a seed of some type?
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post #14 of 57
being a mechanical engineer I know a thing or 2 about heatsink design, most of the ideas above would need a fan to work. The biggest limitation in building larger heatsinks is getting the heat throu the heatsink. Modern heatsinks use heatpipes to transport the heat and then have small fins attached to the pipes.
A 5lb block of copper could take 20min to even be warm to the touch on a CPU. Perfict for suicid runs but not for continued use. For fanless operation the best design would be like the Zalman Reserator1 with a solid copper core and radial fins traveling up the core. The heat disipated would rise (hot air rises) creating passive airflow. Careful not to crush your core if you build this thing.
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post #15 of 57
Thread Starter 
Quote:
Originally Posted by The Bartender Paradox View Post
IBM thinks so. Read it, and while its not exactly what you are talking about its close. Any way the 3 biggest things that affect heatsink performance are how well the heat gets from the cpu to the heatsink (thermal paste or other), total surface area, and how well the material absorbs, conducts and gives off heat. copper is really good at absorbing and conducting heat, but not nearly good as aluminum at giving it off. Thats why we are seeing more of these hybrid Al/Cu towers now. There are other materials that are better than copper, silver for instance. Also an active heatsink is better than a passive, as the overall goal is to get the heat into the air. A fan will provide more cool air for the heat to go into, and it will get the hot air moving away form the heatsink.
Great post.. Thanks!
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post #16 of 57
Thread Starter 
Quote:
Originally Posted by pbasil1 View Post
Oops i meant to say finned, not pinned. For a passive block, maybe it would be smart to have sort of a chimney over the cooler, whatever desighn it be, to create a natural convection effect from the heat rising, pulling cool air in from the bottom. I geuss for a strictly passive design, the tree idea should work pretty well, as long as the base/trunk of the tree isnt too tall. If its too big, it will obsorb alot of the heat, but wount have enough surface area to dissipate the heat fast enough, so the block will become saturated.
Agreed... So.. The perfect fan shape, for the tree, might resemble this?

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post #17 of 57
Thread Starter 
Quote:
Originally Posted by FrankenPC View Post
The bifurcated fin design is already proven in radial heat sinks. i.e.:
http://www.frozencpu.com/products/14...40c14s52#blank

TT call's it "crotch finning"...but it's the same concept.

Also, Ira, check this out:
http://www.frozencpu.com/products/14...l?tl=g40c14s52


But, what you theorize is a much more elgant solution. The problem being HOW to get that formation synthetically. I wonder if you could grow it in a charged copper solution using a seed of some type?
Sweet designs

Thanks... Yeah, it would be hard to manufacture... Your charged copper solution sounds very cool... I'll have to look into that...
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post #18 of 57
Quote:
Originally Posted by Peritus View Post
Agreed... So.. The perfect fan shape, for the tree, might resemble this?

Meh not really, just a simple tube over it with the bottom and top open would create a convection flow, just like BSman described, the tube or the cover would just improve this some. If your really looking to build this, ill have my dad sit down and brainstorm on a few designs, or hell he may know a few already. He is an engineer with many degrees, one being in aeronautics,and many others i cant seem to remember, but he was in charge of maintenece and design of some cooling applications at his new job, and some simlar things while he was a pilot in the navy.

Right now his company is traning over trying to figure out how to cool a small computer control unit, that is the size of a graphing calulator... but the thing is, it going to be placed in the engine compartment of an Abrams tank. All is well while the motor is running because there is mass amounts of airflow from the cooling fans, but once the engines is shut off, no more airflow, and everything bakes....
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post #19 of 57
Quote:
Originally Posted by Peritus View Post
Sweet designs

Thanks... Yeah, it would be hard to manufacture... Your charged copper solution sounds very cool... I'll have to look into that...
You could place a fan at the base of the "tree" blowing gently upwards towards the copper "capillaries". I think that would be one hell of a aircooled heatsink. But, think how soft those fine branches would be. You could accidently crush it.
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post #20 of 57
Thread Starter 
Quote:
Originally Posted by BSman View Post
being a mechanical engineer I know a thing or 2 about heatsink design, most of the ideas above would need a fan to work. The biggest limitation in building larger heatsinks is getting the heat throu the heatsink. Modern heatsinks use heatpipes to transport the heat and then have small fins attached to the pipes.
A 5lb block of copper could take 20min to even be warm to the touch on a CPU. Perfict for suicid runs but not for continued use. For fanless operation the best design would be like the Zalman Reserator1 with a solid copper core and radial fins traveling up the core. The heat disipated would rise (hot air rises) creating passive airflow. Careful not to crush your core if you build this thing.
Thanks for the contribution...

You bring up something I was already pondering.... Heat pipes...

Okay.. so, within the limits of modern manufacturing... AKA what's the smallest diameter copper tube man can create?..

So instead of the tree being a collection of wires, it's a fractal-faceted heat tube....

Once you got to the branch hierarchy where man was unable to manufacture a smaller heat tube, you would go to wires (which hopefully would be able to be inserted into the end of the last level of tubing....

In essence, you've just helped me MULTIPLIED the number of tree "levels".. AKA the 5 lbs of copper was now is used MUCH MORE EFFICIENTLY and is now is contact with MUCH MORE "open air"

Hmm..

Oh yeah... the turbine, if used, would be motorized....
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