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

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

$1 per watt is on the high end of our pricing model for corporate data centers (tier III / IV) that serve a much different hardware and redundancy requirement profile. Our cooling solutions tailored for miners are substantially cheaper than $1 per watt.   The pricing depends on volume. If I am building a single unit, it is going to have a per unit cost that is much more expensive than if I was building you 100 cooling units.  How many SP-30s are you considering?

The path of heat flow through the systems works like this: The heat from the boards/ASICs is tranfered to the rack coolant, which is then pumped to a pump module which houses Redundant pumps, controls, and heat exchangers. The heat exchangers have an oil and a waterside. The waterside of the heat exchangers are plumbed into a warm water loop which runs to a simple evaporative cooling tower, which is the most common & cost effective means for final heat rejection.

The whole system has 3 moving parts: 1. Oil/Coolant pump 2. Water pump for Warm Water Loop. 3. Fan on Cooling tower, which may or may not be on due to current weather conditions.

3-4 KW is a typical energy cooling usage for a 100 KW system.

This is correct, we use an oil based dielectric coolant, which is much more cost effective than a two phase cooling approach. Two phase cooling fluids typically cost about $200 per gallon, while oil based liquid coolants are orders of magnitude cheaper. We can handle rack densities of over 100 KW per rack, with a cooling overhead energy use of about 3%. We can achieve this in any climate on the globe. If you can find me flat level ground, Available Power, communications and a roof, I can build you one of the most efficient, cost effective data centers on the planet.  Please see below a link to a youtube video of what our cooling units typically look like in action.

https://www.youtube.com/watch?v=6IX9U2zaI_I



I would be happy to answer any questions.

Cheers,
Brandon