Relocation to new location
This Saturday I am moving the container with CoolTank to a new location. I hope that the owner of that location will be impressed with the technology and together we will build new innovative “ASICs hotel” and mining power (Th) sharing contracts.
Immersion cooling ready ASICs (SHA-256) are available?
All available miners on the market are made for air cooling; therefore, hashing boards are equipped with huge amount of heatsinks, i.e. Antminers S9 has heatsinks on both sides of each on three hashing boards. As Immersion cooling fluid is very expensive thus there’s the challenging to maximize the number of hashing chips covered by the fluid level.
Antminer S9 hashing board with heatsinks 
Heatsinks removal process 
Heatsinks are not required for the immersion cooling process, but takes valuable free space in the tank.
Heatsinks removal is a very tricky process. No one will guarantee that miner will work after. My experience shows that 2 or 10 miners survived. I also faced the problem that no one was able to fix damaged hashing boards.
I tried to source ASICs without heatsinks, but was able to find only two real options: 1) obsolete miner Avalon A1047L from Canaan and 2) Hornbill H8 Pro from StrongU
I will continue to search for immersion miners.
Immersion cooling tanks for you
Happy new year to everyone !
Immersion cooling lets your mining equipment to mine more by 30-45% than others. This advantage will always be with you, regardless of new ASICs comes into the market. Immersion cooling provides extended life to your ASICs, i.e. you can get as much Th from Antminer S17+ (67 Th) as new S19 (97 Th) can provide.
If you have in mind to try immersion cooling for your crypto mining equipment (ASICs, GPUs), please consider the following options:
| CoolTank by Immersium | BiXBiT | DCX | |
|---|---|---|---|
| Antminer S19 (95 Th, 3250 W) | 6 – 12 pcs. | 6 pcs. | 8 pcs. |
| Cost in Dubai | $15000 | $6000 | $10000 |
| Lead time | 12 weeks | 8 weeks | 5 weeks |
| Picture |  |  |  |
| Immersion cooling process | two phase | single phase | single phase |
| What’s included | Tank, 3M Novec 7100 fluid, Controller, PSU (for ASICs overclock), dry cooler, pump, pipes and fittings. | Tank, Cooling fluid, Controller, Dry cooler, Pump, pipes and fittings. | Tank, Cooling fluid, Controller, Dry cooler, Pump, pipes and fittings. |
| Technical considerations | Max. ambient temperature 42C | Max. ambient temperature 34C Dry cooler should be replaced by more expensive custom dry cooler with adiabatic feature. If you have tap water or chiller, then dry cooler is not required. | Max. ambient temperature 34C Dry cooler should be replaced by more expensive custom dry cooler with adiabatic feature. If you have tap water or chiller, then dry cooler is not required. |
| Heatsinks removal | 6 pcs – not required 12 pcs – without heatsinks | not required | not required |
| ASICs air fans removal | Use custom firmware with 2.5% developer fee, or Use fan emulators | Use custom firmware with 2.5% developer fee, or Use fan emulators |  |
| Safety Overclocking | +45% | +30% | +30% |
| Total hashing power | 805.83 Th (dev. fee 20.66 Th excluded) – 6 pcs. 1611,67 Th (dev. fee 41.325 Th excluded) – 12 pcs. | 722.47 Th (dev. fee 18.5 Th excluded) | 963.3 Th (dev. fee 24.7 Th excluded) |
| Annual profit* | 6 pcs 12 pcs | 6 pcs. | 8 pcs. |
| Air cooling | $11900 $23800 | $11900 | $15900 |
| Immersion | $16000 $32000 | $14785 | $19840 |
| Overclock profit | $4100 $8200 | $2885 | $3940 |
The CoolTank 2.0
Project background
I started the project in January 2018 on the Bitcoin mining hype by purchasing a few ASICs from Bitmain. ASICs initially were located in the apartment but shortly were moved to the heat-insulated container with AC connected to industrial electricity in Jebel Ali (MFC). In April 2018, an overheating problem was raised and fixed by airflow management, but in May 2018, serious investments are required into the air cooling system. I had to stop mining until October 2018 or find a solution.
Air cooled mining farm
The cooling solution should match the following criteria: inexpensive, reliable, low power consumption, low running costs, not flammable, self-regulated and remotely manageable.
I rejected a single-phase immersion cooling solution based on mineral oil because it doesn’t match all mentioned criteria, i.e. it’s flammable, requires tap water, a facility should be supervised during hot days (as oil can be physically heated up to 230C).
2-phase immersion cooling solution matched all criteria and looked more reliable due to the passive cooling process (liquid-> heating -> evaporation-> natural vapor cooling-> liquid). This liquid (NOVEC 1230) normally used in fire suppression systems as a fire fighting agent.
Googling discovered that 3M as a dielectric fluid supplier and Allied Control as a technology provider together developed a product I was looking for – DataTank.
However, this product wasn’t available for sale because Bitfury Group acquired Allied Control for $200M in 2015 and focused a new subsidiary on in-house projects. Technically the process looked more or less clear, and I started to build my CoolTank in July 2018. I placed service/purchasing orders in Russia, China, Germany and the United States. Everything was delivered to Dubai in January 2019.
The prototype on the CoolTank was put into operation in March 2019 and still running.
Since that moment I had no maintenance, no failures, no problems.
General parameters of the CoolTank:
ASIC S9 Bitmain 13.5Th
Hashing boards 45 pcs.
Overclock +40%
Mining power294 Th
Electricity 30 kW
Cooling 3 kW (pump, fan, AC)
Controls / safety / monitoring temperature via Blynk IOT, WebCam, emergency shutdown by signal from liquid level sensor.
Axial fan on dry coolier
Temperature sensor controls fan speed via Frequency converter.
Project vision.
The next step is to implement the experience of designing, building, testing and using it into a formal “lessons learnt” document. The CoolTank 2.0 will be available for small scale mining (garage use).
Minimum requirements:
>Manufacturing cost reduction>
Plug&play
>Tank on wheels
>Heat insulation
>Flexible dimensions
>Cable management
>Upgradable
>Hot water utilization
Having done CoolTank 2.0, we’ll provide a range of models for different clients: mining at small and large scale, HPC custom solutions for data centres.
Cryptocurrency mining is just one possible use case on the CoolTank and its 2-phase immersion cooling technology. Artificial intelligence development and implementation will provide a considerable demand for cost-effective HPC cooling solutions like the CoolTank.
