Topic: New cooling setup for my asic room. (Read 274 times)

@mikeywith

yeah in New Jersey ,USA.

we have 40 hot days a year.

and only 3-10 over 40c

The room we have has 2 x 400 amp 220 and 1 x 800 amp at 440

So 88kw + 88kw + 352kwatt is available.

to cool it with ac I would guess we need 6 movinair office pro 60000 btu units

burning 30000 extra watts.

Frankly we can’t fit them.

Plus routing 6 long tubes of heat exhaust from the ac to the big exhaust fan would be really hard.

Our power cost is really cheap.

and we could use 300 kwatts of the available power  of 525kwatts.

It is a space size issue that restricts us. also getting air in and out is very hard as the long walls are filled with power panels.

This room now works great up to 85f and at 95f it is too warm.

So far this year three hot days in the mid nineties..

So there will be 40 days coming up that I will just shut the 6 whatsminers off.

time to do that is under 1 minute.

All those tubes cost under 400.
Fans under 400
Two 36k btu  acs were 1700

So we spent 2500 to 3000 on cooling this year.

The power cost is not an issue. But I would guess 12000 watts are spent to cool maybe 150,000 watts.

It's nearly impossible to achieve, 1KW of electricity load creates 3412BTU/h, the power required by a decent AC to product 3412BTU/h is 0.33KW, in other words, 1/3 of your power capacity will need to go to AC (you still need to count the room BTU, lights, and what not) but safe to say 33% of your power.

Phil's set up is 192KW which means 63kw worth of cooling needs to be there, so 9-10 pcs of the AC unit he has right now, the cost of running those 10 Aircons or otherwise the lost opportunity of running other gears makes relying on AC only a very terrible idea.

Your second proposal of water chiller is more reasonable, the ratio between cooling and power consumption is a lot better, however, it has a few issues.

1- Can't be done in places where humidity is high
2- Needs a good supply of water
3- Needs a ALOT of intake space

pretty hard to have all of those 3 in one place, so the best option there is, is to force airflow in and out of the farm, ideally, if you had an infinite supply of air flow, your miner temperature will be the exact same as the outside air temp, but that isn't possible, so just increase the airflow as much as possible with every way possible.

Now depending on your climate, it really makes no sense to spend so much on cooling taking into consideration the one single month where temps go above a certain degree, for my case, usually around July-Aug, we have days where temps can go above 50 degrees Celsius, 40c is normal, 30-35 is about average, it would be unwise to spend that much money just to be able to mine at full speed for 1/12 of the year, when the farm becomes extremely hot, I can just underclock my gears, drop my total heat generation by about 30% and then mining at 50c becomes as mining at 35c.

I see a lot of folks who spend TOO much to optimize cooling for a short period of time, I think most of them failed to run the math, the ROI on that is just terrible, my advice is to have enough cooling for the average warm days which would probably make up 70-80% of the year including the cold days, and for that remaining 20-30% just underclock your gears.

So we filtered more intake ducts. And added a second ac.

setting up the intake on 6 tubes



6+7 =  tubes are now done they all feed s19's.

They have filters. Heat shields (silver bubble wrap)

and 4 car radiator fans giving a gentle air boost

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this is inside the mining room and is the end of the cold isle. It is temporary



and here is the second 3 ton (36000btu) feeding in air.
note white heat air duct we will get that pointed outside next week end.

Watercooling is always messy and expensive in the first place. The only option where this is a valid solution is, if you have relatively tight space or high energy costs. Because if you use water cooling you can have pretty efficient cooling with a relatively low energy consumption. Also the heat can be transferred to another space quite easily, which can be interesting if you want to heat the neighbours house or your swimming pool also 

I was thinking about temporary storage tank from which water can be recirculated continuously so that you can also end up using very little water from continuous supply line. Anyways, you already have jumbo fans in plans which can take care of the whole operation.

Also I am reading you are providing the free heat to warehouse which means you will need to have hot air coming out of the exit blower. This itself makes it bad option to use the honeycomb sheets at entrance.

Better go with your plan itself considering the CFM flow, its already bigger project and adding such water sheets would make it more messy.

No dice on swamp cooler. Town has poor water with tons of sediment.

Hard to use swamp cooler in a tight spot.

Out other room has a hessaire swamp cooler it works well because we keep a distance with it so the sediment does not coat the gear with calcium deposits.

Als we want to keep that open door closed.  But will will use a 5000 cfm blue fan to pump air in to the room.

look to right side of this photo we will pump in 500 cfm on corner

we heat the entire warehouse for free.  The mining room is 8 by 20 power closet. Say 160 square feet.

That 160 square feet has over 500,000 BTU of heat.

The warehouse is about 40,000 square feet.

It stays toasty in the winter spring and fall.

Very cool insights into your crypto mining operation! In what weather conditions do you live that require such extensive amounts of cooling?
Also what I would be interested in, is if you ever thought about using the excess heat in the winter to heat some office/production space nearby, or is this not possible with your setup?

That's around 3x reduction in the power. Well, 60,000 BTU/h seems reasonable power to cool down the entire system

I was thinking how about you place another blue fan at the entrance. Obviously it will get much noisy as it could but can push air constantly as compared to the conventional fan that has been installed at the entrance.

Going further if you are anyways trying to experiment various methods of cooling then how about doing this:

1. Install a blue fan with 60,000 BTU output.
2. You will need to build a skeleton frame which will cover the entire back of blue fan.
3. Look for the HoneyComb Pads OR also called as Winter Mattress in some regions.
a. These are water compatible sheets, you can deep them in water or somehow circulate water stream through it. Once the blue fan sucks air, this time it will suck pre-cooled air.
b. This can increase the efficiency of cooling to many folds and it will cost you no significant energy.

the gear puts out 500,000 btu

we do have 2 ac's each are 36000 btu total of 72000 btu

we would need to use a lot more power to push say 180,000 btu of ac

3 of these is likely the most we can do

https://www.movincool.com/climate-pro-k-series/climate-pro-k60/

they pull 6,600 watts each so 20kwatts

ours pull 2,500 so 2x = 5 kwatts

I did more work yesterday but forgot to photo it

I am going back in a few days I will photo more.

That’s amazing set up you have got. I can see standing fan on the entrance side while blue 5000 cfm fan on the other side of the room. So logically you are pushing Cool air from one end and sucking the hot air out of the room with blue fan.

But how about cooling the entire room with Air conditioner. I’m just adding up this because the room is pretty closed one and can get cooled down pretty fast.

That’s just traditional way, but I’m sure you might have thought about it already and there are some issues with direct room cooling?

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final shots

5000 cfm blue fan





and up top is the 14000 cfm fan

you can see the ac exhaust going into the fan
you can see the blue 5000 cfm fan on left.





we will be able to do three 5000 cfm blue fans

and one 14000 cfm big fan

giving 29000 cfm air out

we will feed 21 tubes at 300-400 each which is 8000 cfm in
we will feed three red fans not viewable here which is 9000 cfm
we have a 3000 cfm fan be door. this is 20000 cfm in total


the inside the room  ac is 36000 btu

we will feed a second 36000 btu ac from the outside {not pictured} which has 900 cfm of air


this give us 21000 cfm in and whatever gets in open door.

along with 29000 cfm out.

should be fairly balanced when we are done.

60 s19's are about 60 x 400 = 24000 cfm air. so we should be close with air matching

I will do more photos over the next few weeks.

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 note yellow tube. it is exhaust for a 3 ton ac from movinair.com the office pro 36

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note a temporary insulated barrier that keeps ac in cold isle. you can see ac pointed at the cold isle in back of photo.

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inside the mine is a very large heavy duty rack. it will eventually be 60 units of m30,m50,s19,L7 doing about 60 x 3200= 192kwatts

you can see current blue exhaust on left and very large 14000 cfm fan at high center the top two rows are fed from the black 8 inch tubes to this style duct.

https://www.ebay.com/itm/304119146264

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We have 15 ducts to 15 s19's

we will get 6 more ducts for six m30+m50

notice we are lining up the duct pipes to that silver rack

we will attach the ducts to the rack

then use these fans to aid the air flow

https://www.ebay.com/itm/262632691425?

we will end up with 3 silver racks doing 7 vents each.

we have a place for those 5000cfm fans to exhaust air. see plywood on left we will exhaust 10000 cfm at that point.
inside the room we are exhausting 5000 + 14000 cfm = 19000 cfm

a total of 24000 cfm to exhaust.

Been redesigning the asic room.  this room has no space for cooling it was a power utility closet about 8 by 20 feet