Exploring Below Ambient Water Cooling

Page 25 - Seeking answers? Join the Tom's Hardware community: where nearly two million members share solutions and discuss the latest tech.
I would like copper on at least the coldside as I'm unhappy having aluminium near the water,
I may yet replace the Peltier in there anyway so...
Whatever I do has to fit inside the current confines of the chiller though, theres not much room above it and I need to keep it sealed and dustfree as much as possible
I had considered adding copper blocks to the mass itself as cold retention/mass reduction measures as well, but thats a wonder at this point, firstly I need to get the chiller installed and running at manageable temps 🙂
All journeys are made up of individual steps hehe

Moto
 


I have a massive copper block in my possession which I completely wasted $150 bucks on, it's 10 times the copper mass of a traditional water block copper base, it did not work!

Because it was so massive it retained the cold to an extent it became capable of chilling the hot side of the peltier causing it to stall.

Up to this point I have absolutely discovered that cooling the hot side of the peltier is best accomplished with an air heat sink, I'm presently cooling with 2 different heat pipe versions. (questions still to be answered can a traditional finned heat sink fan combination handle the hot side?)

The answer should be yes if you take the factory design of Moto's Chillbox into consideration, however just one of my peltiers draws 5 1/2 times the power his does, so how much extra cooling is required for that increase of power, the heat pipe cooler may very well already be the best option.

With both peltiers I'm running 11 times the cooling wattage Moto has available, and that still was not enough to run my CPU and GPUs (2 580GTX with full coverage water blocks), all in the same loop.

Note: My goal is to have the same temperatures available using peltier cooling that I had with the Ice Block cooling that started this thread.

That goal is to be able to run at 10c which is 50f, for any and all overclocking possibilities at those temperatures which presently is exactly where my water temperature is right now and that's 16c below my ambient with my CPU only loop, and about 19c below my radiator cooling and still free of condensation.

Since I overclock my CPU much more than my GPUs it's much more critical keeping it as cool as possible, though I was hoping to have it all in one loop it would probably take a third peltier to accomplish that, or still run 2 loops and let the GPU loop be cooled by the 3rd peltier?

I just have to decide where to proceed from here, with shrinking it all down being at the top of the list.

ROFLMAO :lol: Seriously, I need to invest in vinyl tubing stock and tubing insulation, as I go through that stuff with all my changing and testing!

With all my testing and setup changing since this thread began, I have easily gone through $200 of vinyl tubing and pipe insulation and I'm not joking, thankfully the clamps are reuseable!

Picking up the cold is best done with a traditional water block sized to fit the peltier itself, with the water flowing through the block picking up the cold from the copper base.

Questions still to be answered does modifying the water block to increase it's flow actually need to be done?

High restriction water blocks like the XSPC Rasa have to be modified or it will freeze up on you, or are there water blocks that won't freeze up if they're not modified, by possibly completely removing a jet plate increasing the flow rate past freezing?

There's still a lot of unanswered questions, unfortunately answering these question not only requires time, it requires money to acquire what's to be tested, and that's where most shy away.
 


Have you at least considered the company that designed the Chillbox, did extensive testing on what worked best for that product before having enough confidence of the product to actually produce and sell it on the market?

The fact that it dependably works is proof of massive pretesting all possibilities before settling on the present Chillbox design.

Changing anything regarding that Chillbox will probably end in failure, take what you learn and go forward, that's my advice.

I'm showing you in this thread what will actually work and work very well.

I wish the best for your experiments!

However I wish you would consider what I've already proven to work in this thread and help improve upon it.

Since it does actually work very well, it may be the future of water cooling a computer!

Learned Facts to Share:

TEC assemblies can replace radiators and not only replace them but produce below ambient cooling that radiators by themselves are not capable of doing.

TEC assemblies work best from an insulated reservoir with all tubing runs insulated to retain the cold temperatures isolating the tubing from any ambient contact.

TEC assemblies flow restriction is less than radiators of any combination, but the water blocks used must be high flow water blocks.

TEC assemblies require far less fans than multiple radiators, meaning less noise to deal with, but do require a good heat sink cooling solution for the hot side of the peltier

TEC assemblies require more power to run the peltiers and they should be on their own power supply, linked started to the main computer, a more than capable power supply and preferably a single 12v rail.

Any Questions?


 
:)

here's how I imagined it. The technology/idea behind a golf ball is the dimples on it create turbulence and allow it travel further than a smooth round ball. Much like a spoiler on the back of a car. At high velocity it adds grip/downforce on a car and it also breaks up the drag produced by the cars back end.

I was thinking along the lines of having a copper tub that was electrically a TEC. You know, making the tub have a cold side and hot side. The cold side would have the liquid in it and the hot side would be exposed on the outside. The walls of the copper tub will have lots of dimples on it - I imagine you hammering the copper tub to have small dimples :) and these lil dimples will assist in allowing airflow.

Or make it with some heatsinks off of it which'll cool the hot side. Throw some fans on there and you have active cooling.

However I see this backfiring when I also know that Copper tends to retain some heat but its the best conductor of heat. Thus its wide volume of use in kitchen.
 


"I was thinking along the lines of having a copper tub that was electrically a TEC."

I'll have the elves in the workshop get right on it!

Not!

Try Again! :pfff:


 


Affirmative! :pfff:

Since I've had Zero luck when it comes to finding an insulated small reservoir I'm just going to have to make one from scratch!

News at 11! :lol:

Don't you hate it when they put something important on the News but make you wait until 11 to reveal it!

That sucks! :lol:
 
I'll take some detailed pictures as long as I remember to do so and don't get too involved in the fabricating and constructing process.

Sometimes I'm bad about getting into the project and 3/4th the way through remember to take pictures!

I still have some ideas and possibilities floating around in my head but will pick up the raw materials sometime today.
 
on my vintage case build log, the cam wasn't far away, I just got lost looking at my swiftech block
NinjaDissapear.gif
😀
 
Scrap the above res plans, I've changed my mind!

I did not want to make it a multi-store adventure today going all over town, and if the first store I went to had all I needed that would have been it.

I was already aggravated after an hour of searching and then a sales employee flat lied to me, I called him out on it, and then he admitted the truth, I got so pissed, I left the buggy loaded and exited the store.

I figured if I had to go to the other side of town I'd just buy everything there!

EEEEEEEEEENNNCH!!! :pfff: Wrong! :non:

They didn't have everything either and what they did have was more expensive, so I left another partially filled buggy!

Decided to just insulate the XSPC dual bay res, I already had, bought 1" thick hard dense Styrofoam board called Foamular (Brand new stuff from Owens Corning), to insulate it with.

Anyhoo, So much for todays efforts, if you need more info, buy a ticket!

It would be nice if the lying jerk was the one that had to put all that stuff back!

:lol:
 
What thermal paste did you use between the Thermalright cooler to the cold plate, the cold plate to the peltier and the peltier to the water block?

Also i want to modify my water block like you have do you have any links to guides or what do i need to remove?
 


Timtronics Grey Ice 4200

It's performance is covered in the Thermal Compound Roundup

I have a choice of using any compound covered in the roundup and I choose Grey Ice 4200, it is the best thermal compound I have ever used, it's the only thermal compound in the entire roundup I would actually buy myself, and trust me I hate the fact I'm getting low on it, but I will buy another tube of it.

As far as water block modifications I disassembled the XSPC Rasa and the Acetal top goes all the way down to the copper pins cut into the base plate, I simply took a dremel tool and shaved about a 16th of an inch off the bottom of the acetal top until the small O-Ring impression was completely gone.

I then used the dremel to cut small channels out from what would be the center of the new bottom like spokes on a wagon wheel, they were about the depth of a piece of #2 pencil lead, then continued with the dremel and smoothed and cleaned up all the edges.

You are only modifying the acetal top part that protrudes all the way to the copper base plate and nothing more!

Then reassembled and tested for leaks, whatever you do be patient, and be careful, and do do not damage the outside sealing ring groove, and it will reseal leak free.
 


You'll have to excuse me if I show no concern for the guys future, some people are just chronic liars, that's the way they live their life, and sooner or later a lie will always find it's way to the truth!

You reap what you sow in this life!

This situation had nothing to do with the customer being right!
 
I'm presently conducting tests with only 1 gallon of water in the res/cooler and the lower the water mass the quicker the temperature drops, which is information that has to be taken into account even considering lowering the water volume to a standard dual bay reservoir level of 26 ounces of liquid, that's not even a quart.

Any way you look at it, it is a test that has to be run to see what will happen with that low a water amount with TEC cooling, and I'll be attempting to do it without completely reworking my present setup just to test it.

I'm always hopeful these tests will be successful ventures, but sometimes they're not, so we'll see.

I'm not sure if pictures are necessary for just using double stick tape to secure the 1" thick Foamular Styroboard to the acrylic dual bay reservoir so do you guys want pictures or not?
 
Well plan change again!

I'm beginning to sound like my wife, and that's not bad.

After realizing I could only get 26oz of liquid mass with the XSPC dual bay res, I took everything I had purchased to insulate the res, back to the store and picked up everything I needed to go back to my original plan and build an insulated reservoir, from scratch.

It's constructed and already in operation in the time it's taken to type this the water temperature has gone from 19c to 12c and dropping, I did take pictures but have not had time to look at them yet.

As fast as the temperature is dropping I'll more than likely have to adjust the heat sink fans, but the reservoir itself is a success with no leaks!

It holds a little more than a half gallon approximately 70oz or 2 litres.
 
My modems dead lads so I'm going to be awol for a few days until the new one arrives, I'll check in but can't do much on my mobile, dataplan is only 2Gb and I'm almost at the end of my billing period
:-/
Have a good new year and I'll be back before you can spit
Moto