Mining room Cooling

[whoismoses]

Here is what I am doing. In the cold months, I have a damper I can open and close. I redirect the warm air into the return of my HVAC system. I use the mining heat to heat the house. It helps.

In the summer I send the heat out of the house.

[dhouse]

can anyone recommend a simple cooling setup for a basement, i have only a 3-gpur rig now but would like to add a bunch more. Would like to just to have them on those plastic shelving units. They are in an unfinished basement area right now. There's a small window with a window well that i could use, plus another one at the other end of the room.

I'm thinking roughly of some sort of box/container/tent to store the rigs and thus confine the heat, with some kind of exhaust system that could pump air in and out of the window. Any ideas of where to start on this? the more straightforward the better.

Grow tent with 6 or 8" intake/exhaust fans.

where do the fans go, how do i set them up in the window(s)?

[jimmykl]

@citronick's heat management post on @philipma1957's megathread is really useful so thought I'd share it here too:

I gone through the ups and downs of managing temps in the GPU farm.

The lessons I learnt as follows, hope it helps in your environment.

1. Hot air naturally goes up - so your vent/blower out should be on top to naturally move hot air out of the farm/room.

2. Floor standing fans pointed upwards are useful to get airflow moving upwards - get rid of hot air pockets forming at rig level.

3. Static pressure VS non-Static pressure - use them to help you move hot air quicker. Avoid having outake vents/fans without intake vents/fans. Always have IN and OUT airflow so that no hot air are recycled into the farm/room.

4. The fastest rigs, ie superclocked at supersonic speed, will create lots of heat (probably reduce the lifetime of your GPUs too) and your over stressed PSUs will also produce heat - Beware that most super fast rigs are NOT stable over time. My ETH farm in the early days was a monster of a setup 30-31MHs rigs screaming away and power bill was high. However, they do need reboots due to hang etc. I was using Windows then. Currently, my farm is all Linux using smOS. Only a handful W10 for NVIDIA and test rigs. ETH mining is very very stable, cool and steady hashrate at about modest 26-28MHs rigs resulting hashrate to pool's stratum servers consistently without interruption and zero stales. I stopped ETH mining about 2 months ago. Now NH/Cryptonite and later BTG.

5. I have 2 of those air extractors/blowers - I don't use them often but on very hot days I use them and position the orange hose on top the big rigs (12/13/19 GPUs rigs) zone. My big rigs zone is in the middle of the farm. The surrounding perimeter are all the 6/7/8 GPU rigs.

6. All Deltas and server PSUs are hung like bats -- exhaust pointing upwards.

7. The farm has CCTV and I can remotely monitor environmental like temps and decibels via the CCTV.

8. AC is not required - I tried it ... AC is useless. Unless you are using Data Centre grade AC then that's a different story altogether. Its all about INTAKE and OUTAKE (top) and moving HOT AIR UPWARDS to the top as fast as possible.

[jimmykl]

Great topic about air flow and cooling so I figured I'd post about my plans here.

As I prepare for summer, I need to figure out what to do with all my rigs.  I'm at around 16kw right now, but anticipate being well above that by the time summer (and heat) rolls around.

My plan is to get a 40' shipping container (about $2,000 delivered) and ask if I can get it in white.  If not, I'll have to paint it myself.

I plan to install 3 10,000 CFM 36" exhaust fans, evenly space along the top, along one of the long walls.

These guys:

https://www.northerntool.com/shop/tools/product_200422375_200422375

Full specs here:

https://www.jdmfg.com/wall-master-exhaust-fan

They are very efficient and move about 20 CFM per watt.

On the opposite long wall, I'll cut out 6 24x24 inlets, evenly spaced along the bottom.  My mining racks will then go right down the center with a 36" isle on either side.

A 40' container is about 3,000 CF, so 30,000 CFM should be able to replace the air volume 10 times a minute.  That would be enough draft I would think, that I would not have to worry about any additional cooling, even when it is 100 degrees outside and the sun is baking down on top of the container.

Good idea or bad idea?

Great idea. I know a group running ~100 cards in a 20' container (with room for more) and can't see any reason it wouldn't scale up.

They removed a section of side wall and fabricated some louvre panels with filters for the intake and mounted big 3-phase exhaust fans in the roof (not sure of cfm specs).

Their container is a red/orange colour and has stayed relatively cool on ~90˚F days.

[crazydane]

Great to hear they are running 100 cards in the 20' with no issues.  I should be able to scale a 40' to 200 cards easy then.  So here's the spot I have picked out:



The container is not quite to scale.  It is a little small.  The pole barn opening is about 14'.  North is pretty much straight up in the above pic, so the container will be in the shade during the afternoons.

And I'm only about 100' from the power pole:



Figured I'd have a separate 400A service run to the container.

So this is how I envision the ventilation system:



So air will flow from the low intakes to the high mounted exhaust fans on the opposite wall.  I don't anticipate needing any "helper" fans in the mining racks.

[philipma1957]

Great topic about air flow and cooling so I figured I'd post about my plans here.

As I prepare for summer, I need to figure out what to do with all my rigs.  I'm at around 16kw right now, but anticipate being well above that by the time summer (and heat) rolls around.

My plan is to get a 40' shipping container (about $2,000 delivered) and ask if I can get it in white.  If not, I'll have to paint it myself.

I plan to install 3 10,000 CFM 36" exhaust fans, evenly space along the top, along one of the long walls.

These guys:

https://www.northerntool.com/shop/tools/product_200422375_200422375

Full specs here:

https://www.jdmfg.com/wall-master-exhaust-fan

They are very efficient and move about 20 CFM per watt.

On the opposite long wall, I'll cut out 6 24x24 inlets, evenly spaced along the bottom.  My mining racks will then go right down the center with a 36" isle on either side.

A 40' container is about 3,000 CF, so 30,000 CFM should be able to replace the air volume 10 times a minute.  That would be enough draft I would think, that I would not have to worry about any additional cooling, even when it is 100 degrees outside and the sun is baking down on top of the container.

Good idea or bad idea?

white or silver works.

shade the intake air

[QuintLeo]

Intake and exhaust on the same wall needs a LOT more seperation than I am seeing in that photo from the OP.

Intake low exhaust high works better than the other way around, as it works WITH the natural heat flow of the room.

Intake UPWIND from exhaust should also be kept in mind.



 The crossflow setup from the last couple posts looks viable, similar to some degree to the Gigawatt "hut" things, but you want to push the racks closer to the intakes to avoid having a lot of the airflow just go "over" the racks - or put some sort of flow restriction in along the intake wall at the height of the top of your highest rigs to make the use of the airflow more efficient.
 Depends on how tall the racks are - if they get within a foot or so of the roof, don't worry about it.


 With the kind of airflow you're planning, the color of the container shouldn't matter - might even want it to be dark to reduce ice/snow buildup on top of it in the winter.