Topic: Air conditioning and miners (Read 857 times)

13 x 13 feet is still moderately big room for one miner.
For 5 miners the heat would be a lot and all you have to do is keep the room temperature to the lowest.

I see lot of technical details above but frankly speaking when you set up your miners and do the work then you will understand actual situation in the room by assessing it with few factors such as:
1) You atmospheric temperature
2) Your room area
3) Volume of your Air Conditioner (if central then this wont count)


I have my own set up of two miners with similar room dimensions as yours but a little larger by 2 feet.

Honestly, that's huge area.

My set up is in temperate area where atmospheric temperature goes above  45 °C in summer and is always around 30-35°C on the average day.

I have only one Air Condition in place which is also only 15 tons and is average size AC in my country.

The whole set up can be seen as follows:



I would like to point out that I have made this assembly in a room which was built with 2-3 inch plywood and gypsum material. This is very poorly constructed in terms of fixed structure and thus there are minor openings in between two sheets and many times outer air flows in which could be hot air blow making huge fluctuations.

I am telling you the negative's in my set up because even after these unwelcomed conditions my miners temperature is around 40-60 °C. This further drops to 28-30°C in the winter and rainy season.


Image: Represents 2 Hrs of Graph for my miner with Sapphire Cards.[/center]

Scale & Descriptions:

......... ---> Watt Graph (Yellow Dotted Line)
_____ ---> Hash Rate (Purple Line)
_____ ---> Temperature (Red Line)
_____ ---> Fan Speed (Blue Line)

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You might be setting up ASICs, GPU's etc but remember one thing, just keep the Air Conditioners airflow directly onto your machines and you are good to go.

In my case as you can see, I have kept the miners fan direction opposite to each other and away from the AC's flow.

This literally sucks the cool air and throws away in the room. This does not at all heat up the room because over the time your room as whole gets cooled down!

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Just in case if you are interested . . .

Part I - [GUIDE - Personal Experience] How to get started with Mining
Part II - [GUIDE - Personal Experience] How to get started with Mining

Riiigggghhhttt... Only been designing/building industrial power electronics and cooling systems for them since 1975 so...

Yes the moisture content (humidity) of an airflow does impact its heat transfer rate as the air stream flows over a surface (here, heatsinks) - more specifically, it changes heat-capacity of the air - and as such deserves consideration when designing the heatsink structures, their surface areas and type of airflow needed BUT that has nothing to do with the purely mechanical nature of what thermal shock is. For a top of the Google list reference see https://www.corrosionpedia.com/definition/1079/thermal-shock They are two very different and separate design points to consider...

Thermal shock is induced by fast and sizeable thermal cycling - not cooling efficiency at any given point in time. If the temperature swing is extreme, rapid, and the material is a particularly fragile & poor conductor of heat - say a glass heated to a couple hundred degrees and then plunged into water - the material cracks/shatters from the wildly uneven stresses that are induced by thermal shock.  For less fragile materials the damage per-thermal cycle is usually far lower but it *does* add up if the material is not self-healing.

Back to the main point of the thread, an AC system needs to be properly sized for where it is operating and the design heat load + a reasonable reserve margin. If sized correctly and one is not sucking in too much unaccounted for tropically hot & damp air from say, a swamp next door, the humidity in the room where the miners are will be very low no matter where on the planet you are because the AC runs long enough to remove the moisture. The primary problem that excessive humidity can cause- condensation leading to corrosion - is eliminated.

The thermal shock does not have to do with humidity?  are you serious? I think you need to go back the college and take thermodynamics classes.

Random and very incorrect speculation written by someone who has no understanding of cooling processes.

'Thermal shock' has nothing to do with humidity but it *can* affect connections and solder joints. Thermal shock is the result of different materials that are in contact with or bonded to each other expanding/contracting by different amounts when their temp is changed. Stress in the joint builds up and later released when temp cycles up and down. Thing is, the temperature swings needed to be rather significant, happen often, and relatively rapid to cause it - as in at least several 10's of degrees per minute.

Yes if the AC is pointed directly into the intakes of a miner and the AC frequently cycles on & off then you could introduce thermal shocks to the components. As for the 'humidity' bit -- if you mean condensation and if the AC is oversized enough to be running for just a short time followed by long times of being off then yes, excessive humidity not removed by the AC remaining in the air could very well condense on any cold surfaces and cause problems.

It could cause you problems, the thermal shock generates humidity and therefore affects the electronics of the PSU

The built in air conditioning worked very well to cool 15x rx6600 and 3x antminer s19j pro

If you can dump AC vent outdoors, then you can dump Miner air outdoors and that's all that OP needs.

That said, if power cost is zero, then cool it all you want.

Op said one unit or 3.3 kwatts.

He does not mention power cost.

If he puts in a 10,000 btu portable ac along with the ac that flows into the room. The room should be cool assuming he dumps the heat via the attached vent to the portable ac.

is it efficient no. but power cost may not be an issue.


will the extra ac cool the room if he vent the ac exhaust into the room no.

Ac moves cold in and dumps heat out. the vent on the portable ac is clear in the photos.

his idea will do 1 s19 if that vent dumps the air out of the building.
his idea will not do a s19 if the ac vent does not dump the air out of the building.

Airflow to the environment is your only answer.

I rented a warehouse space with 100KW 3-phase electrical service.  In Texas.  Airflow in and out is all you need.  Filter the air and keep dust out of your units.  Still need to clean them occasionally.

Bitcoin mining is the process of turning electricity into money.  AC cooling will triple or quadruple your power bill, likely sending your costs beyond your profits.

Standalone portable AC units need to exhaust their heat somewhere, if you are exhausting this outdoors, then you can exhaust the miners outdoors.

Experiences

 - Miners slow down a bit when ambient air is 100F
 - Miners don't do well when ambient air drops below 32F because of heat stresses across the board from one end to the other.  Too much temperature gradient.

Well I read the Amazon link to the 10000 btu ac.

It has an exhaust duct.

So it will dump hot air out of the duct.

So to the op would you be able to use the provided duct and send the hot air out of the room?

If you can vent the duct on that portable ac out of the room where would it go?

If it goes into a second room that room will be very hot and humid.

If the duct can exit the building you would get it to work.

But your post said no venting so I would say it will not work.

Yeah I think it is stupid that the OP did not actually want to listen for the most optimal solution, but he waited for an answer which suited the best for his decision on using AC. The decision which I think he had already made before asking the opening question.

But hey, it is often like that here at Btctalk when you try to help the new guys...

@HagssFIN, already advising you, never use a 13x13 indoor air conditioner, it's risky and never use a way to cool your crypto miner computer/GPU with cold air without filters and open spaces.

Using air conditioning without an open space can cause dust to accumulate, this can cause the computer/GPU to be hampered from cooling itself, can automatically cause excessive heat during the mining process.

It's better if you use a small fan with the window open, to blow away dust and not stick to the device, maybe it's safer that you use it, than using air conditioning without an open space.

Without help from outside cold you can't mine in finished areas like a home or carpeted and insulated office space. In hot area you may be able to mine in unfinished area like an industrial warehouse where you can install large industrial fans to improve airflow. I still don't understand how people mine at home in Florida or Texas where they have no winter. But then people are mining in Dubai. they must have a solution if they are mining at home. For me the a/c cannot help the moment outside reaches 80.

The link that you posted above with amazon it's a portable AC I have experienced using it with my miner in a small room. Actually, it didn't help to cool down the room you will feel both hot and cold and it makes your miner sticky I believe that it's because of portable AC that adds moisture to the air.

That is why I decided to use an exhaust instead to take all the hot air out of the room and stop using AC for miners. But you can try if you don't understand what they told you above.

Thanks for your responses. We are going to try a floor standing air conditioning unit to support the built in ac unit.

I'm going to agree and disagree with some of the responses here. It is possible you 'could' get away with running ONE miner in a small office without additional cooling equipment, but this would really depend on how powerful the aircon unit is and the ambient temperature / climate of your country, but it's far from ideal.

I've had miners running temporarily (but for several weeks) in rooms with no ventilation or AC and no problems at all (UK climate).

Also, one of my small farms here in the UK is totally passively cooled (no extractor fans or AC). I have 54 miners at this location, 36 of those have a 3D printed adapter screwed directly to the exhaust fans which gives a 150mm tube output, onto which I have clamped flexible tubing which runs to an external louvre (so basically these 36 miners vent hot air directly to outside using the power of there own fans). I then have a further 18 miners in the same room which literally sit on a shelf and exhaust hot air into the room. There is of course a large passive air inlet also, but everything is stable. Air is circulated by the miners' fans only. It's a very large room and it does get hot in there, but from what I've seen the 17-series miners are more reliable when running hot anyway, in fact of those 36 x 17-series units (24 x S17e and 12 x T17+) I've only had 1 fault (a dead PSU) in the 1.5 years they've been running. In contrast, I've got a fair few S19's which are much newer and had several problems including dead PSU's and dead hashboards, these are at locations with powerful air-cooling. So it could be argued that miners are better running hot, who knows...

No.

I feel like a parrot, but please read my previous post once again.

And did you miss what NotFuzzyWarm said?

Do you think we could add floor standing air refrigerator?

Such as this:

https://www.amazon.co.uk/dp/B084ZL4L1P

The s19 is essentially a 3.2kw space heater with EACH putting out 10,918.85 BTU of heat...
As Hagss said, whatever AC the building supplies will not be able to keep up with that kind of heat output. It's just not designed for it.

Never try to solve the heat dissipation with AC.

You need good airflow with a fan system.
Take cold air in and push hot air out, roughly said.