here's a teaser 
Cosmos 2 extreme water cooling system
- Thread starter OliverS
- Start date
Last check of the piping.
Pump switch on time T-30 minutes.
No leaks so far.
tests are running!
I suppose you all want updates.
Pump switch on time T-30 minutes.
No leaks so far.
tests are running!
I suppose you all want updates.
Last edited:
Soldato
- Joined
- 19 Feb 2012
- Posts
- 4,409
yes updates! looks awesome
Leak
LEAK
LEEEEEAAAAK
****** koolance ram connectors.
I'll need cable ties now.
LEAK
LEEEEEAAAAK
****** koolance ram connectors.
I'll need cable ties now.
Associate
Looks a bit messy? 
Yeah the ram cooler connectors have been leaking. Its making bleeding hard. Im replacing with smaller tubes asap
Soldato
- Joined
- 29 Jun 2004
- Posts
- 12,957
Well done on beating two types of Cancer! This is a well deserved treat!
I see you have Incropera. An excellent choice sir, I have a copy myself. Might I recommend Process Heat Transfer by Hewitt, Shires and Bott, and the Handbook of Heat Transfer by Rohsenhow, Hartnett and Cho.
You're an engineer or applied physicist (student, PhD, job)?
Either way, if I were you I'd sit down with a pad and paper, sketch the case and write out all the resistances to heat transfer, in two dimensions. I really wouldn't bother trying to do an analysis in three dimensions because it'll take long.
I imagine buoyancy due to density variations caused by temperature differential will be neglected.
Personally I'd have the inlet fans blow in air in the case and radiators as turbulent as possible. As I expect you know turbulence increases the heat transfer coefficient and overall heat flux into the system.
For your information as a general guideline for heat transfer coefficients (from Krieth, Principles of Heat Transfer):
Air free convection 6 - 30 W/m^2 K
Superheated steam or air, forced convection 30 - 300 W/m^2 K
Oil, forced convection 60 - 1800 W/m^2 K
Water, forced convection 300 - 18000 W/m^2 K
Water, boiling 3000 - 60000 W/m^2 K
Steam, condensing 6000 - 120000 W/m^2 K
I dispute the condensing and boiling coefficients because of the large amount of uncertainty.
Anyway, good luck.
I see you have Incropera. An excellent choice sir, I have a copy myself. Might I recommend Process Heat Transfer by Hewitt, Shires and Bott, and the Handbook of Heat Transfer by Rohsenhow, Hartnett and Cho.
You're an engineer or applied physicist (student, PhD, job)?
Either way, if I were you I'd sit down with a pad and paper, sketch the case and write out all the resistances to heat transfer, in two dimensions. I really wouldn't bother trying to do an analysis in three dimensions because it'll take long.
I imagine buoyancy due to density variations caused by temperature differential will be neglected.
Personally I'd have the inlet fans blow in air in the case and radiators as turbulent as possible. As I expect you know turbulence increases the heat transfer coefficient and overall heat flux into the system.
For your information as a general guideline for heat transfer coefficients (from Krieth, Principles of Heat Transfer):
Air free convection 6 - 30 W/m^2 K
Superheated steam or air, forced convection 30 - 300 W/m^2 K
Oil, forced convection 60 - 1800 W/m^2 K
Water, forced convection 300 - 18000 W/m^2 K
Water, boiling 3000 - 60000 W/m^2 K
Steam, condensing 6000 - 120000 W/m^2 K
I dispute the condensing and boiling coefficients because of the large amount of uncertainty.
Anyway, good luck.
Hi Ricochet J,
I'm a data analyst at the moment. If stuff hadn't gone wrong I'd be doing a PHD in Physics now or Naval architecture. But thats lift.
Incropera is good, I'll take a look at Hewitt, Shires and Bott +Rohsenhow, Hartnett and Cho.
Physics books always make good reading.
I was a technical sales engineer, but I got fired for having cancer in January. So now I analyze data. Boring data but still, keeps the maths up while I look for something more permanent (and of course better paid).
As for the modeling, I was already down the 2d route. 3d is just unnecessary and given the turbulence in the pipes, largely can be ignored.
I'm working on all the thermoelectric loops at the moment. They're the more complex ones.
Still from the current flow rates, the pressure in the ram slots is good. Arguably I could use smaller ID tubes there to increase flow speed, but that depends on how good the Y splitters are. I'm already losing a lot of speed in the first Y junction.
Im also having to take into consideration the reduction in CPU loop speed that this change will have. I prefer the ram coolers being much slower flow speed than the CPU.
Its catch 22 with the fans.
While the front intake and top intake can be on full pelt, and barely make any noise as they're super awesome, the rad ones are different.
Turbulent over the rad means noise.
I've gone for sucking over the rad to allow for turbulent flow and with the blade geometry on the prop hopefully laminar flow from the exhaust of the fans. That should scramble noise.
A bigger problem at the moment is I forgot to put a bleed valve in, so once the case is filled, I'm going to have to rotate it to get rid of the air bubbles.
They're not big now (yay) but before when it was a closed loop the air all gathered in the right ram coolers and compressed so it was going no where.
I'm a data analyst at the moment. If stuff hadn't gone wrong I'd be doing a PHD in Physics now or Naval architecture. But thats lift.
Incropera is good, I'll take a look at Hewitt, Shires and Bott +Rohsenhow, Hartnett and Cho.
Physics books always make good reading.
I was a technical sales engineer, but I got fired for having cancer in January. So now I analyze data. Boring data but still, keeps the maths up while I look for something more permanent (and of course better paid).
As for the modeling, I was already down the 2d route. 3d is just unnecessary and given the turbulence in the pipes, largely can be ignored.
I'm working on all the thermoelectric loops at the moment. They're the more complex ones.
Still from the current flow rates, the pressure in the ram slots is good. Arguably I could use smaller ID tubes there to increase flow speed, but that depends on how good the Y splitters are. I'm already losing a lot of speed in the first Y junction.
Im also having to take into consideration the reduction in CPU loop speed that this change will have. I prefer the ram coolers being much slower flow speed than the CPU.
Its catch 22 with the fans.
While the front intake and top intake can be on full pelt, and barely make any noise as they're super awesome, the rad ones are different.
Turbulent over the rad means noise.
I've gone for sucking over the rad to allow for turbulent flow and with the blade geometry on the prop hopefully laminar flow from the exhaust of the fans. That should scramble noise.
A bigger problem at the moment is I forgot to put a bleed valve in, so once the case is filled, I'm going to have to rotate it to get rid of the air bubbles.
They're not big now (yay) but before when it was a closed loop the air all gathered in the right ram coolers and compressed so it was going no where.
Of course it does. This is the first tube layout. Its no where near finished. There's no right angle connectors anywhere so is going to look like a great big pile of cack. Functionality > aesthetics. Aesthetics come after Im happy with the layout leaving enough space for future expansion. (thermoelectrics and hardware).
When you've spent ~£1200 on watercooling components why would you care about some £3/m plastic tube?
Blame running over budget on my boat for the lack of connectors in this paycheck!
Plus this is my first watercooling build. Don't fret. No where near done. Im more interested in stress testing and learning at this stage.
When you've spent ~£1200 on watercooling components why would you care about some £3/m plastic tube?
Blame running over budget on my boat for the lack of connectors in this paycheck!
Plus this is my first watercooling build. Don't fret. No where near done. Im more interested in stress testing and learning at this stage.
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Dw not offended. Just explaining why its cack.
Updates in sections:
1.2
1.4
2.2
3.x
1.2
1.4
2.2
3.x
Last edited:
Soldato
- Joined
- 29 Jun 2004
- Posts
- 12,957
For right angles you might be able to retrofit Swagelock couplings. Have a look at their UK site and check the catalogue. 
Already taken care of that in 1.4, but thanks Ricohet. The new connectors are coming on Tuesday I hope.
I had to upgrade it from an aesthetic problem to actual when the torsion started breaking compression seals.
I had to upgrade it from an aesthetic problem to actual when the torsion started breaking compression seals.
After many hours with a mole wrench, connectors and pipes I feel more Adrian Shepard (or a plumber for those of you that dont know Half-Life).
Nearly done, updates soon.
Nearly done, updates soon.
While I've no doubt this will end up a really good build, I cant help thinking you're over complicating things!
However, it does interest me so I'll keep an eye on the updates to see how you're getting on.
Oh, I am a plumber and I can assure you that a few compression fittings, flexible pipes and PC hardware feels nothing like actual plumbing!
However, it does interest me so I'll keep an eye on the updates to see how you're getting on.
Oh, I am a plumber and I can assure you that a few compression fittings, flexible pipes and PC hardware feels nothing like actual plumbing!
Associate
- Joined
- 15 Aug 2012
- Posts
- 3
Hi.
[/list]
11.
This is the Noctua's installed in the top. If you see the 2 screws left of the Bee, one above and one below; these are the two you need to remove to install the 3rd fan. From other forums people have struggled with this. So there you go.
Questions?
Dear Oliver,
I just bought my self a Cosmos 2 and I have a question about the part where you mounted 2 Noctua fans in the top area of the case. You have mounted your fans at the top part of your case just under the mesh grill part of the top, I mean like this http://img98.imageshack.us/img98/7260/20120728143018.jpg
Where as a lot of people have mounted them in the top area but then at the bottom. (see http://www.techspot.com/articles-info/541/images/25.jpg for an example)
Now I have read that you can mount either 3x 120mm fans or 2x 140mm fans at the top. But thats in the area where all the other people are mounting them, like they are doing at picture that I showed you.
But because your mounting them on the top part I was wondering if you are able to mount 3x 140mm here --> http://img98.imageshack.us/img98/7260/20120728143018.jpg
Well I am very curious about what you are going to answer.
GReetings from DrDeathhand