Heat Calculations

[Carsie]

I'm new to this and trying to read up and understand about the cooling and airflow needs of the Antminer S9.  Please comment on anything that you can add to this.  I've pulled these numbers together, but I would greatly appreciate someone going over them to confirm that the values and calculations are correct.   Thanks in advance!!!!!

100 Antminers

1,200 watts per Unit/Antminer
3.41 BTUs per watt
1 RT = 12000 BTU
RT = Refrigeration Ton

(Antminer * (watts * BTUs)) / RT = Refrigeration Tons

(100 * (1,200 * 3.41)) / 12000

(100 * 4,092) / 12000

409,200 / 12,000

34.1  Refrigeration Tons

[Steamtyme]

Don't use refrigeration it will kill any profit you can attain from running gear. I posted in your other thread and as long as you have ambient temps below 40C (This is max) you just need to be sure you are removing the exhaust air. What is the environment and weather like where you want to mine? There are always options but in extreme climates you are better off to just mine like 18 hours out of the day if possible.

[philipma1957]

                                                         miners  >>>>> fans>>>>  say 30k cfm
                                                         miners
   fans 25cfm  >>>> air filter >>>      miners
   ac  air >>>>>>> air filter >>>       miners    

you can send some ac air filtered
but sending filtered normal air in at 100f can work

[Carsie]

Thanks for the information.  I'm in the foothills of North Carolina.  My thoughts are that the temps will not be too hot.  Based on what I am reading, the secret is ensuring that the airflow stays constant with mild to low humidity.  I'm actually more concerned about humidity than I am about the temps as long as I can keep the airflow up.  Any additional thoughts are greatly appreciated.

[euhctcyn]

Don't use refrigeration it will kill any profit you can attain from running gear. I posted in your other thread and as long as you have ambient temps below 40C (This is max) you just need to be sure you are removing the exhaust air.

Just do this, it's the best option by far. If possible, make it a 2 chamber: one cold chamber for the miners to intake and the other warm chamber to exhaust. Just make sure to extract all the warm air from the second chamber and you will be good and without AC.