Custom Waterblock

[NickNack]

For a while i have wanted to make my own water-blocks, as i love little projects.
I have never water-cooled before, so I'm throwing myself into the deep end slightly.

Anyways, here is a plan of the CPU water-block I want to make.

The block is 55x55x5 (mm), with the pins 1 mm square by 3 mm deep. Each channel is 3 mm wide.

Each tooth has a surface area of 13 mm^2. There are 169 teeth (13^2) so that gives the teeth a total area of 2197 mm^2.

I don't have any experience with heat transfer and all that complicated stuff, so I'm learning as I go along.

This project is actually for a university portfolio, so hopefully the admissions people are interested in me

 

[tinytomlogan]

Image isnt working dude

 

[OcSurfer]

i think Editor22 ie the illustrious Nate may be interested in this, he makes a lot of bespoke items for modders

 

[NickNack]

Image isnt working dude

Hmm, i can see it in the thread on my screen :huh:

 

[FredEx]

I don't see it either over here in Michigan, US. :crazy:

 

[NickNack]

I attached them as a file, hopefully you can see now

 

[NastyFighter]

Ok, so you need help improving this design if Im right? Im willing to help a bit. Im a second year student in mechanical engineering and have learned some things about heat transfer. So I know some stuff but Im NOT an expert.

First of all what you want is surface area as you already calculated, the bigger the better. You also want to be able to direct the flow of liquid to ensure that there are no hotspots of swirling liquid. Also a thing to consider is to have a turbulent flow between the ribs/fins. A turbulent flow is better at heat transfer than a laminar flow. The type of flow can be determined by calculating Reynolds number (Google it) and is dependent on different factors. Most of the time you have turbulent flow, but you always need to calculate to be sure.

To increase the surface area of the fins/ribs and to make sure you have a 'controllable' flow it might be better to use longs fins instead of small blocks. Using your distances of 3mm and 1mm I made a new model. With this little modification I already more than doubled the surface area.

I came up with this.

Total surface area = 4537mm^2 = 349*13

I hope this helps a bit, of course this is far from ideal. Eventually you want fins that look kind of like those in an EK Supremacy or something similar. This guy shows the inside at 8:13. http://www.youtube.com/watch?v=khyeXnp3CLk

It is very hard to calculate and find a good design, the heat transfer depends on a lot of different factors, many of which you can control and change yourself and thus it is hard to find the ideal situation.

I hope this helps, if you have any questions feel free to ask.

 

[wassupdoc]

It's a very interesting project, I wouldn't mind applying a bit of physics to this