Quote from: mikeywith on Today at 10:43:46 PM

Quote from: DaveF on Today at 06:54:14 PM

Flat out you need more cooling. Keep in mind the air conditioners are 60k BTU in a perfect world, the will likely be a little lower then that.

I believe this has to do with the quality of the AC and its climate rating, the ones I am looking to get are T3 rated, which means they should be able to keep their rated cooling BTU capacity at temps up to 52c.

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AND keep in mind you will need some other networking equipment in the room that will generate a bit of heat. AND slip air conditioners also put out a little heat. (blower fan, electronics and so on 1 is not a big deal 10 will be putting out a couple of hundred watts) once again not much in the normal world but you are hitting up against the maximum cooling they can do as it is.

You are 100% correct in terms of the added heat by all the things you mentioned, but they remain a drop in an ocean compared to the actual load coming from the miner.

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Either add 2 AC units or take out a few miners. OR be even safer and do both, a little less profit is better then: https://youtu.be/fxGgx3YCCAA?t=8

Would love to add a dozen more if it was all easy and cheap, as I said, this is a huge challenge really, those 60k BTU ACs are expensive, big, hard to install, and would probably be a bit noisy so the more we add the more noise we get, in fact as it stands right now I have no clue if we would be able to add the initial 10 pcs without going past the noise level we are trying to maintain.

What I am counting on here is the ambient temp, see according to my understanding of these BTU ratings, it's the amount of heat that can be removed per hour, which means if we were to picture a scenario as follows:

A miner using 3kw would generate 10,236 BTU per hour, so if we use a 10,236 BTU those BTUs coming from the miner will be kicked outside and the room temp will be identical to the outside temp.

Based on that (assuming it's correct) if the outside temp in the above example was 15c, then I would need less cooling, simply put, I don't need the mining room to be at 15c, I am okay with 30c, which means probably using half the 10,236 cooling BTU will be enough to keep the room at 30c while the outside temp is 15c.

Using that same example and doing with the assumption that I am okay with temps being as high as 35c, it means, as long as temps outside are not above 35c then a 1:1 ratio would do just fine (the compressor will be running 24/7/365 of course).

I am also counting on the fact that I will only need to keep the lower side of the room cool enough, the ceiling could be boiling hot and I wouldn't bother about it.

I am probably saying these things to make life easier lol, but we will only find out when we try, I spoke to a guy who ran 3*S9s in a 4m*4m*3m room using only 12,000 BTU AC, so 14k BTU of heat vs 12k BTU of cooling and he said the miners were running pretty cool during all seasons of where he had them (10c winter to 40c summer), he said the room was (warm to feel) in the summer, but the miners had no issues, so I am counting on something of that nature, I know I won't be able to sit or sleep in a 35c room, but I am sure those gears can survive, so no way I am giving them the joy of running extremely cool.

Another advantage the system should have is the fact that it will be 100% dust free, we just going to have to seal the door, and probably add a door air curtain to keep dust from getting in when opening the door, clean like-new miners should be able to handle slightly higher temps.

but, alas, as I said, this is a challenging project, it could easily fail, and we will have to test it one step at a time, in the summer, when things are hot, we will probably have to either add more cooling BTUs or shutdown/underclock some gears as you mentioned, but let's find out in a few months when we start working on the project.

Quote from: philipma1957 on Today at 07:11:26 PM

I wonder how much outdoor heat will affect the room.

Please refer to my above explanation of how I 'think' outdoor heat will affect the room.

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If you down clock to 3050 watts you may be good.
If you do 10 ac on the cold and 1 piped to the hot.

you have 660,000 btu

and miners are dropped to 538,000 btu

660000x80% =528,000 btu.

So you have a 20% safety factor by adding 1 ac unit and clocking lower.

Yes, this is one thing I really like about Whatsminer, after all, we could just start with 5-6 AC units, and underclock all gears to 2,000w and see how things go from there, the ideal way of doing this would be to run all gears at full speed during the average weather, and run them underclocked during the 1-2 months of heat, instead of adding way too much cooling just to run cool for 1-2 months.

What we have found in the small dense under ventilated room is there are knees or cliffs of rocket 🚀 to the move temps.

Ie 95f outside temp all good inside the room hotspot 99f

but 99f outside temp runaway thermals room hotspot 117f

or 150kwatts 90f outside temp 94f in room
but add 6kwatts to 156kwatts and same room will shoot to 117f

you are going to find out your pivot points by under clocking say 2000 watts a unit.

good.

but 2200 watts everything will over heat like mad.

get a temp app for the phone set it to warn you then under clock ⏰.