Watercooling a heatpipe?

[jaydee]

Gald to see you around 8-ball. Makes sense to me.

[Pajax]

Originally Posted by 8-Ball

Ok, so I haven't been around fo a long time, but I did do some calculations on heat pipes a while back.

Anyway, if you break a heat pipe up into a series of thermal restrictions, you get the following

1. Conduction from outside of heat pipe across copper wall
2. Vaporisation of heat transfer media
3. Transport of vapour throughout heat pipe
4. Condensation of heat transfer media
5. Conduction from inside heat pipe across copper wall.
...
The problem is the 2nd stage. While doing calculations on a waterblock incorporating a thermabase, I discovered that this step was limiting and for most processors, was already MORE of a restriction than some high performance waterblocks.

In other words, heat pipes will not rival watercooling for performance applications, but may offer some benefits for silent applications as with zalman.

The value of watercooling a heatpipe is negligable.

I hope this makes sense.

8-ball

OK. It is true? I thougt that step 2 + 4 is insignificant compared to dT (waterblock/water) and step 5 is insignificant because of very(very) large surface. I have no information about 3... But you are right. Its complicated and perfomance is meaningless. 8°C or 7°C what a difference!

[Roscal]

Here's my test of them (french, sorry ) : http://www.cooling-masters.com/articles-29-0.html

[bigben2k]

Nice Roscal!

Do you have any idea how the inside is laid out?

[Roscal]

Yes a simple Archimède screw, I can't show you the internal design CAD (not necessary)...
T'as pas lu c'est marqué pourtant

[bigben2k]

Merci! Oui j'ai lu, mais je voulais savoir si tu pouvait en reveler un peu plus. Merci!

[Razor6]

It looks like the long one has good performance but because of its restrictiveness still looses to the MCW6000. Factor in that it costs a bit more and looks very torquey it doesn't seem all that great.