CarnotJet Liquid Cooling Solution

[Medow]

hello all:

Today i came a cross a product called CarnotJet Liquid Cooling Solution .

I found no info on their site about the price of the unit, i hope some one can give us some info about this product and the efficiency if we use it on bitcoin mining.

here is the website of this product:

http://www.grcooling.com/

Thank you.

[AJinNYC]

Basically similar to this, I'm assuming:

https://www.youtube.com/watch?v=y_yfHJ8yoh8

[sidehack]

With a name like Carnot, it better be the most efficient system physically possible or it's false advertising.

[GR Cooling]

Medow,


Our system is extremely well suited for the high density cooling needs of bitcoin mining farms. We have a large amount of experience with mining hardware, most notably spondoolies products. Any vendors hardware will work in our system.

We can easily handle heat load densities of up to 100 KW per rack, with a total system cooling overhead of about 3% of miner power usage. The miners themselves also use less electricity, as all fans our removed and leakage current is reduced due to vastly decreased chip/board temperatures. This results in a electricity usage decease or about 5-15% for each miner, depending on the model.


We can do complete turnkey data center build outs for significantly less than $1 per watt of server load / heat rejection capacity ( typically around 70-80 cents per watt depending on scale of build) that include power distribution infrastructure from a 480V feed, cooling towers and water loops.  We have a standalone product and a containerized solution that is housed in an ISO shipping container, with no building required.




AJinNYC:

The fluid of the video you posted is 3M novec. While similar in performance to our system, it is extremely expensive when compared to our oil based coolant. Novec costs about $200 per gallon, while our coolant is less than $10 per gallon. While two-phase cooling is more efficient (1-2 % cooling overhead vs 3%) the upfront costs make it less attractive. Novec also evaporates into the air (housed in a sealed atmosphere system), and will need to be topped off occasionally due to losses from open lid servicing. Oil based coolants do not evaporate or oxidize, and last the life of the system. Both systems make air cooling look archaic from an efficiency, density and performance point of view.


I would be more than happy to answer any additional questions.



Cheers,
GR Cooling

[IITravel01]

This is interesting to me, is there a way to use your products in a small home environment?  What is the needed equipment and costs if so?  I'd be interested in trying this out on a couple Antminer S5's I've ordered.

[GR Cooling]

IITravel,

I am sorry, but GR Cooling's system is designed for large scale industrial cooling, and would not be a good fit for anything home based.


Cheers,
GR Cooling

[IITravel01]

Thanks for the reply.  Might be something to consider in the future.  Wonder if this is something someone can home tinker with.  Is the liquid similar in thickness as a coolant?  If so, then finding a compatible pump and using radiators (like in a typical liquid cooling setup) with fans might work for a in home setup (instead of water heat exchanger).  If someone could design a fan (turbine) that works in the fluid and attaches to a hashing unit like a 120mm fan (in size also), that would probably make this type of cooling system more adaptive to home use also for all computer systems.  All you would need then is a tank to submerge the computers into, acrylic to see though would be good if the heat doesn't go near 60 degrees C or above.

[IITravel01]

I see someone had a similar idea.  Wonder how it would work with the Electrosafe oil fluid coolant (at less than $10 a gallon it makes it more possible for home use)?  https://www.youtube.com/watch?v=fStHV_Q-x7s  Would be nice to see this type of cooling for computers that would allow for the only need to be the tank (preferably around the size of 3 S3+'s which is the same as the Corsair Air Carbide 540 case) and the ElectroSafe fluid and some in fluid type fans/turbines and using all other already available products that can be purchased for a water cooling setup (ie, tubing, radiators, pumps).

[AbuGarcia]

For home use the biggest difficulty is how to cool the liquid.  Once it gets to temp and is equalized with outside ambient, your cooling tower will need to increase in size. 

-For water evaporative cooling (water-oil), You would need at least a cooling tower, then a heat exchanger and at least 2 pumps. 

-For air to water cooling, it would not be possible in the summer unless your tower was proportional to the heat cooling factor (think cooling tower taller than your house in some instances).

a radiator or other simple heat transfer devices will be inadequate.  These systems rely on moving massive gpm and effectively exchanging the heat. 

I guess you could do it.  But you would need to custom fab each of the critical components, then apply for the proper permits.
so I'm guessing for a home mining operation 20kW you are talking about at least $15-20 grand US

[jimmothy]

The fluid of the video you posted is 3M novec. While similar in performance to our system, it is extremely expensive when compared to our oil based coolant. Novec costs about $200 per gallon, while our coolant is less than $10 per gallon. While two-phase cooling is more efficient (1-2 % cooling overhead vs 3%) the upfront costs make it less attractive. Novec also evaporates into the air (housed in a sealed atmosphere system), and will need to be topped off occasionally due to losses from open lid servicing. Oil based coolants do not evaporate or oxidize, and last the life of the system. Both systems make air cooling look archaic from an efficiency, density and performance point of view.

You say 2-phase is more expensive yet you are charging nearly twice as much as Datatank. (As of ~6 months ago they were asking ~$0.45/W and they claim to have cut the costs significantly since then.)

Also about the fluid loss, Allied Control claims they lose less than 0.1% per month.

[johnyj]

If I have to put that kind of investment in infrastructure and time, I'd rather buy an old 200 meter high natural cooling tower and put miners in the bottom of the tower, and let the tunnel effect cool all the miners with strong wind 

[AJinNYC]

IITravel,

I am sorry, but GR Cooling's system is designed for large scale industrial cooling, and would not be a good fit for anything home based.


Cheers,
GR Cooling

If I could get a rough estimate, what would a set-up with twenty SpondooliesTech SP35 units and about two hundred 1kw (custom built) webservers (they would vary between 1U and 2U units) cost for your cooling system?