ASICs / Humidity levels

[trinitrate]

Hello,

I know in general we want to control the humidity levels for ASICS to a reasonable level, but I was curious what your experience has been if you're working with miners in un-airconditioned spaces.

In the climate I'm in (U.S. Desert Southwest), I can control the temperature pretty well with evaporative cooling because the weather is so dry.  In the early summer, the humidity might only be 15% outside, so cooling with evap will lower temps by 20 degrees or so, and will raise humidity up to about 40-50% which should actually be healthier for the miners.   In the late summer this gets worse, with a chance for humidity to reach 60 - 70% if I cool the miners down to a level that is suitable for running.

If there is no condensation risk due to the heat, and the humidity is still below the mfg's specs (90% for S9), do you see any risk in this or am I tempting fate?

The other option is powering down for the worst days of the year and accepting a $0.00 profit those days (Actually negative because of rent / depretiation etc.).  That still seems cheaper than buying enough A/C to cover any sizable install of S9's.

Is anyone using AC to cool ambient from maybe 110 down to 85 or so and then exhausting the airflow outside?  When I look at CFMs needed from the AC to keep each miner exhausting ~200cfm, the AC winds up having about 2x's the tonnage than would be expected based on the heat load of the actual miners.

thanks for any insights

[NotFuzzyWarm]

With the temps miners run humidity is not really an issue. They are too hot for condensation to happen so rule that out. The only other matter is that humid air is harder to remove heat from (using A/C) BUT it is better at absorbing heat. Reason is the specific-heat value of the water content.
Your being in the Southwest and using evap cooling should work perfectly.

[trinitrate]

With the temps miners run humidity is not really an issue. They are too hot for condensation to happen so rule that out. The only other matter is that humid air is harder to remove heat from (using A/C) BUT it is better at absorbing heat. Reason is the specific-heat value of the water content.
Your being in the Southwest and using evap cooling should work perfectly.

Thanks for the info, that does make sense!  That's where I was headed just hoping for confirmation.

[QuintLeo]

I'm pretty sure that every ASIC-based miner I've seen specified up to at least 80% RH in it's operating specs.

 Even with *2* evaps running in my current space though, I'm only getting to low 30ish at the miner intakes and perhaps 55 right at the output of each evap.

[Sandal_Hat]

I'm pretty sure that every ASIC-based miner I've seen specified up to at least 80% RH in it's operating specs.

 Even with *2* evaps running in my current space though, I'm only getting to low 30ish at the miner intakes and perhaps 55 right at the output of each evap.

I see. Will rust be an issue after a few or several months of mining?
It should be ok right??

[QuintLeo]

It would take a very HIGH humidity level to make rust an issue - and that would strictly be on the frame/case of the miner and even THEN it takes a long time and a VERY high humidity level to see rust in less than years.

For perspective - most places COMMONLY see 80%+ humidity many days a month, and sometimes 90-100 just before it rains.

 I saw more "high humidity" days in many MONTHS when I was in Iowa than I've seen in a year in Central Washington - despite last winter being a "high snowfall" winter for the area.