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Author Topic: Small Immersion system, modular.  (Read 36 times)
jdandcoke
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November 12, 2021, 07:06:39 PM
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TLDR; Utility tub sink holding 3 full size miners with recirculating pumps that use a large aluminum radiator. Semi sealed overflow system.
Do you think I'll have enough flow rate or should I go ballz deep with a large single pump but then more overflows will be needed??


V1.0 Diagram posted. https://imgur.com/OyZXdnh
I'm a small hobby miner and need to address dust as well as noise. Dust is the main concern as well as airflow for more than a couple miners. I can't cut large holes in the building for more ventilation but I can run coolant lines outside.

The utility sink is a one piece molded tub that is about $100 that has flat surfaces in which holes for bulkheads can be drilled. Conveniently the drain can be used as a cool return at the bottom and additional holes with bulkheads can be drilled and located optimally in the bottom as well. Overflow is done with four 1" bulkhead fittings. Both supply and return connect to a 3" manifold system below the tub. Cover the top with a clear cover with a seal to keep dust and contaminates out of the tub as well as evaporation of the oil. Miners are supported on the bottom with wire racking to allow coolant to flow underneath. Cold supply from the back and hot return at the top front should make the coolant flow up and through the miners.

Pumps and flow are where I could use some feedback. Large pump will work but it takes more power. The immersion cooling videos on youtube dont seem to have a lot of circulation.

What Coolant to use?  Mineral Oil?

Thanks
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November 12, 2021, 07:23:04 PM
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If you look under the Hardware area you will find several threads about this...
Main thing is do NOT use mineral oil! It attacks plastics (like on wiring) making them brittle, rather poor thermal capacity and can cause corrosion of copper & metal parts. ref https://www.engineeredfluids.com/post/corrosive-sulfur-in-mineral-oil-a-killer-app-for-electronics

One thread is here https://bitcointalk.org/index.php?topic=5366598.msg58221683#msg58221683

As for the plethora of YouTube vids... As with all things there, take what is presented with a grain of salt. Most are done by folks who really have no idea regarding the how's & why's of what they are doing  Roll Eyes

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November 12, 2021, 07:37:11 PM
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Also, I don't think mineral oil would work very well with a car radiator that is meant for water-like viscosity. I think you'd need a liquid in the same viscosity ballpark as water, otherwise, you'd need to run really high pressure to move enough through the radiator to be effective.

Have some dead Bitmain 17 series hashboards or full miners?
I'll buy them ... send me a PM with what you have and I'll make you an offer!
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