immersion cooling

Video of boiling process

You can see boiling liquid evaporates, cools down and rain back. The boiling point is 61C. Chips temperature 65C.

immersion cooling

Why I made the CoolTank?

In crypto mining profitability of operations heavily depends on difficulty of mining. Difficulty rises and share for each mining machine drops. Share drop affected by new mining farms joining mining and new more effective equipment availability for purchase. Mining operators have to continuously invest in new equipment, approx. every 2 years.

So there’re plenty of obsolete miners available for sale on You can by Antminer S9 13.5T for 150$. When it was issued to market 2 years ago people paid 2000$+, but it was bitcoin bubble. Anyway now Antminer S15 28T costs 1035$ and it is “sold out”.

What if we could use S9 like S15 without purchasing it? Is it possible?


What is required:

1) CoolTank

2) 15 miners (prepared for immersion cooling)

3) custom firmware

4) The test with standard PSU 1400W shows 15T, however test with PSU 2100W will bring hashing power to 20-24T.

Other benefits:

  • By 90% will drop cost for cooling you miners
  • No noise
  • No dust, no shutdown for cleaning
  • 3x more miners in the same room
  • Savings on investment in miners

You can come and see the CoolTank working in Jebel Ali FZ.

You can buy the Cool Tank for yourself.

immersion cooling

Cold trap turned to oven

Hello everyone!

We haven’t posted anything for a long time, because of a problem that forced us to invent solutions.

Everything was good. We installed everything in the Cool Tank and run last tests before adding liquid freon. We noticed that cold trap temperature raised too high up to 50+C.

Why this could happen?

Previously we noticed that pump was working a little bit noisy. The reason for noise was air in pipes. While we were fighting with air bubbles removal from water flow, cold trap cooling wasn’t effective enough and we got over heat.

Thermal elements inside cold trap melted. So we lost it. It was unique item made per our specifications with serial number 000001.

So now we fixed circulation problem by removing all obstacles from cold trap piping

Also added water meter to be sure, that we have circulation and to measure pump flow rate.

New piping around cold trap

And finally we tested the last survived thermal element. If we have efficient circulation able to remove heat, we should have temperature below zero on the other side of thermal element.

Let’s see:

Everything is ok now. That’s what we need from cold trap.

So, now we have to wait for replacement of thermal elements, assemble cold trap and proceed with start up on the next week.

To be continuing…