Jinx3825, you are correct, almost.
When it's raining or above 90% humidity, the intake air is nearly saturated with moisture which will likely still condense in the first part of the miner before the air temperature rises above the dew point enough to be non-condensing. It only needs a surface to condense upon, not a colder surface.
The evidence for this is empirically demonstrated by the many miners which have suffered destruction due to corrosion caused by repetitive condensation formation. Counter intuitively, it is unusual for electronics to short due to condensation. Shorts are more often due to dirt and dust accumulation, although sometimes triggered by condensation.
Please refer to the Dew Point description here.
https://en.wikipedia.org/wiki/Dew_point
If your intake air is 100% relative humidity, you only need to raise the air supply temperature about 5C to eliminate condensation formation. If you have the intake and exhaust of all your miners fully isolated, you can add a small fan to return a little of the exhaust air back into the intake plenum to provide the needed intake temperature rise. Really, you should heat the intake air whenever the humidity reaches 90% or whenever the Dew Point / Temperature spread is <5 degrees.
Topic: Antminer s9 air flow (Read 363 times)
That is not very good idea, if outside is really COLD like < 10 C, you can make condensation. If during the day or whenever, something happens, you loose electricity from unknown reason. And they sit there idle for 5-10 minutes. You will have drops of water. And when electricity comes, you can just say bye bye to your miner...
Correct me if I am wrong, But I do believe you are incorrect. Condensation only forms when the object is colder than the environment surrounding it. By definition condensation is "water that collects as droplets on a cold surface when humid air is in contact with it." For example, a glass of ice water. You always see this because the water inside of the glass is colder than the surrounding ambient air temperature. In this circumstance the S9 will be much hotter than any air being drawn in. Even if the miner goes down it is located inside so the temperatures should never be colder than the air being drawn in. Summer ac could potentially be an issue however.
i've seen the ebay attachments to allow for ducting the exhaust, but how do you best funnel these exhausts to vent out?
Thanks for the replies, better have a rethink on my setup
Agreed. It wont make sense as it will pull in rain water or cause possible condensation.
@Raymond_B is right, i bought 4" exhaust from ebay, and my temperatures are pretty high(nothing dangerous) but around 85ish, while i had custom 5" they were around 75ish. Havent tried one with the 6", but customs one that i made are made from 2 parts, not 3D printed
From all the pics and videos ive seen of s9's on the internet, ive never seen anyone venting fresh air from outside straight into the miner with ducting?
Ive seen ducting on the back of s9's but not directly in the front.
Would it be bad to duct fresh air straight from outside?
Im talking about those 3d printed shoulder thing on ebay
https://www.google.co.uk/search?q=antminer+shoulder+duct&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&dcr=0&ei=8-xgWqvUNYX98weXy5OYCA
Ive seen ducting on the back of s9's but not directly in the front.
Would it be bad to duct fresh air straight from outside?
Im talking about those 3d printed shoulder thing on ebay
https://www.google.co.uk/search?q=antminer+shoulder+duct&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&dcr=0&ei=8-xgWqvUNYX98weXy5OYCA
Generally you do not see the air being ducted in because the key to keeping the miners cool is removing their waste heat so they do not pull it back in. If you do use those duct adapters I would recommend a 6" for an S9. I tried a 4 and 5 and those both raised the miner temps, the 4 especially.
That is not very good idea, if outside is really COLD like < 10 C, you can make condensation. If during the day or whenever, something happens, you loose electricity from unknown reason. And they sit there idle for 5-10 minutes. You will have drops of water. And when electricity comes, you can just say bye bye to your miner...
From all the pics and videos ive seen of s9's on the internet, ive never seen anyone venting fresh air from outside straight into the miner with ducting?
Ive seen ducting on the back of s9's but not directly in the front.
Would it be bad to duct fresh air straight from outside?
Im talking about those 3d printed shoulder thing on ebay
https://www.google.co.uk/search?q=antminer+shoulder+duct&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&dcr=0&ei=8-xgWqvUNYX98weXy5OYCA
Ive seen ducting on the back of s9's but not directly in the front.
Would it be bad to duct fresh air straight from outside?
Im talking about those 3d printed shoulder thing on ebay
https://www.google.co.uk/search?q=antminer+shoulder+duct&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&dcr=0&ei=8-xgWqvUNYX98weXy5OYCA
Jump to: