Topic: Immersion cooling for a home setup, and what mining gear to invest in? (Read 89 times)

Hi,

Long time lurker, some GPU-mining previously - but recently got into asic mining.

Currently have some S9s controlled with aftermarket firmware running them at 900 W inhouse. Fan speed around 15-20% of maximum. Next up I plan to replace the fans with a duct-ventilator system, which I'm planning will be able to accommodate a bigger miner S17 or S19 in the future.

Noise suppressing boxes for the miners are popular, but as the fans are the root cause for the noise - fixing airflow or cooling by other means seems like a better solution.

My main motivation for investing in miners are seeing a return on the investment, and secondary using some of the excess heat to heat our house.

Electricity are stable slightly below 0.1 USD pr kWh all taxes paid, so the S9s are at the moment barely profitable - but they provide 'free' heat which comes in handy now during winter and most of the year.

My plan going forward with investments are:
1. Max out total power around 10 kW. Service to our house are 18 kW.
2. Keep noise to acceptable level, preferably below 30 dB inside house and having the garage somewhat not like the inside of a server room is a plus.
3. Recouperating some of the heat to provide heated water (and maybe a heated pool in the future).

I have extensive knowledge within electronics and SMT repair work, but I would like to have miners running rather than fixing them. But modifying them to run silent or longer between maintenance is no problem to undertake.

Immersion cooling seems like a no-brainer to reduce noise level. Watercooling seemed like a better solution at first, but it seems immersion is safer. As long as the immersion liquid is fine to handle and keep around the house (many are not).

Ideally I would like to run the liquid around 70 deg celsius and use a heat-exchanger (plate cooler) to heat the hot-water in our house. With regards to efficiency of the mining hardware, that does not seem to be a good idea with S19 series miners.

What, if any, mining equipment is known to thrive around 70-90 deg C? Basically 1 miner between 1-2kW will cover all hot water needs, so could possibly run separate baths for hot water heating.

Planning to invest around 10k USD yearly the next 2-5 years, focusing on gear when prices are high and miners when krypto prices are depressed. As my power-budget is fast consumed, I am looking into ETH-based miners which are very profitable right now - but certainly other asic offerings are better on power cost to revenue, any models to keep an extra close eye on?