People have been asking how to prep miners for submersion. I've just added a second S9 to the #bitcoinwaterheater, so I used the opportunity to take some photos and videos on the process for 4x S9.
Step 1: disassemble the miners - yes some of them are filthy...
Step 2: clean them with compressed air
Step 3: Put some of Bitcool in a pan and wash each part in it, use a brush to get some of the stuck stuff off
Step 4: Repeat for all miners and all parts of the miner.
Step 5: put miners together again and let them rest after the stress
Step 6: Don't throw away the used Bitcool! You can filter it through a paper towel and a funnel and are ready for the next cleaning.
Also I've heard that the leftover grounds in the pan show the future mining difficulty, I let you decide yourself what they tell us ;)
And that's it! With a second S9 we have now 2x 1600W = 3800W of heating power, which is the same as the electrical coils, so we can compare the original WaterHeater vs the Miners even better.

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More from @Schnitzel

May 29
#bitcoinwaterheater update: Back on track!
After a bit a downer thinking that Miner uses 2x energy, I'm happy to report that indeed most of the loss was towards heating the room and not a flaw of the system itself. 💪 TLDR: We're 69% as efficient and that's without any insulation
After talking to other home miners (big thanks to @Adrian_van_Wijk) its clear that the key is to insulate everything as good as possible. Plus also reduce the amount of bitcool that is used as much as possible, as it has to be reheated first before it can heat the water.
Here the actual data:
24h sampling, used 34.7l during shower, did two heat cycles, plus heating right after the shower. Total 6.71kWh. The electrical water heater used 4.66kWh also for 24h, this makes an efficiency of 69%. Now again, this is only a single day, need more data ImageImage
Read 4 tweets
Mar 5
#bitcoin Miner #Airstream heater build 🧵
Of course main question is: why even bother?
1. Heaters in RVs are propane based and can be a bit finicky (not work at all)
2. They are even on or off, creating temperature swings 3. If you are out of propane you are out of heat.
1/16
Using a #bitcoin miner gives a more constant heat (with Braiins we can control the exhaust temperature), plus it runs on electricity which at most RV Parks is included in the rent of the space (therefore "free" heating). So how it is built? 2/16
It's an Antminer S9 with a 12V squirrel fan (much less noise than the normal fans) in a plastic box. It sucks air through a dryer vent into the box and pushes the air out via the miner, through a hole in the box into the Airstream. 3/16
Read 16 tweets

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