you would think that if the miner can only run up to 85 degrees than thats about the temperatiure you can pump intoo the dryer transfered from the oil still 85 degrees is hotter than the ambient air so the electric part of the dryer can switch off sooner (they usually measure the airtemperature and the machine continues once the set limit is reached ) you basicly keep all the hookups in the dryer stock and just tap intoo the heater coil to trigger a relay to start the miner setup then run the hot fluid straight from the miner trough a large coil of copper tubing bend around the inside drum and outer shell now because the dryer needs more heat the fluids comming out will probably be hotter than they came in so you would need a bigger radiator to cool it back down to ambiant to send it back intoo the mining rig it might be a better idea to just hook the dryer up to youre central heating network that allready gets heated by youre mining operation the machine connected to the network with a home radiator style thermostatvalve or an electricly operated valve running of the electricity out of the dryer , and use the stack of radiators you have now without all the current mining stuff connected to it to heat the air going in , might need to resolder the pipe connections so the radiators flowing paralel instead of in series (you want all of them as hot as you can get them and as mush flow of hot water you can push through them for the most efficiency ) , you managed to controll the miners temperatures hooked up to the heating so that should work up to a point (still need more heat for drying and you might need to increase the hashrate on those miners during drying to keep the heat as high as it is without the dryer running unless you have a heatbuffer build intoo the system) you might still need to add an electric heater inside the dryer to help along with the mining heat put intoo the machine might need to experiment with airflow too , think more flow would help the hot air get through the big lump of wet laundry inside the spinning drum and remove the moist air out faster helping the laundry to dry out as for the s19 in its homemade tank ...... just let it pump fluid in and out of youre big mining tank (piggyback) , should do ok then as long as its not too hot outside for the radiator of that system to loose the extra heat generated by the extra miner
I am currently using a bitcoin miner as a clothes dryer in a much simpler way. and it has been working for the last 4 month. using and s19 and an old industrial dryer. If i had the cash i would use a newer s21. its all controlled by home assistant some solid state relays and a rpi 2 w on a relay board. Also added a 10inch blower fan other wise the s19 had heat issues. I run the miner at 2500 watts. which nets me about 132f for the temp. I use a temp and humidity monitor with an esp32 to monitor temp and humidity coming out the dryer and a script that starts it all at the press of a button and also shuts everything down when the humidity of the exhaust hits my setpoint (41%). Come winter I plan on using a similar setup to heat my house (depending on cash flow).
That's very cool! Glad to see you had success! I know others have had success with that approach as well. My attempt was to try and solve the airflow problem...most dryers have a 4-6 inch duct exiting...you can't force a full S19 or S21 airflow through that opening, and you can end up with a lot of heat dumped into your utility room. The goal was to try to get down to a 150-200cfm airflow so this could work with any dryer. As you'll see in the other episodes, it didn't work that well, but it was fun trying :-). If you can handle any residual heat build-up, direct airflow is probably the better option at this point. Maybe when we get miners running at hotter temperatures, a low airflow design might work.
Good question. Nominally, the model uses 3100 W (manufacturer's number). So for 24 hours that would be 3.1x24 = 74.4 kWh. But...with the Braiins OS, the power use is ramped up or down depending on autotuning and power scaling. My miners have always been run with power scaling so I really don't have my own numbers.
you are not engineering this correctly because the dryer has a heating element that you are trying to heat with air. This heating element needs to be connected by metal to your sk19. The source of the heat is metal, but you are trying to transfer air to heat a heating element. This will not work. it doesn't matter how fast the air blows, the heat will back up cause it's not leaving its source fast enough. Keep working on it. I want to see the final result.
