Brainstorming Mining room cooling - Need advice

[AriesIV10]

I have many concerns for keeping the S7 cool enough!!!!  I A/C my units right now and they run anywhere from 48-60 degrees Celsius while the required Operating Temperature for the S7 is 0 °C to 40 °C.  How in the world is this going to happen?  Air Volume alone cannot solve this and if you add A/C......there go your profits.

By operating temp I assume they refer to ambient temp/input temp, not the operating temp of the chips.
Can anyone confirm this?

40C ambient is tho..

You are probably RIGHT!!!  I just looked up the specs on the S5 and see that the Operating Conditions were 0 °C to 35 °C:

S5 Specifications

Hash Rate: 1155 GH/s ±5%
Power Consumption: 590 W (at the wall)
Power Efficiency: 0.51 J/GH (at the wall)
Rated Voltage: 12V
Dimensions: 298 mm x 137 mm x 155 mm
Cooling: 1x 12038 fan
Operating Conditions: 0 °C to 35 °C
Certified By: FCC / CE
Network Connection: Ethernet

I am feeling Much better about this!!!

S7 Specifications:

Hash Rate: 4.86 TH/s ±5%
Power Consumption: 1210 W (at the wall, with AC/DC APW3, 93% efficiency, 25C ambient temp)
Power Efficiency: 0.25 J/GH (at the wall, with AC/DC APW3, 93% efficiency, 25°C ambient temp)
Rated Voltage: 12V+5%, should not be less than 12.0V
Chip quantity per unit: 162x BM1385
Dimensions: 301mm(L)*123mm(W)*155mm(H)
Cooling: 2x 12038 fan
Operating Temperature: 0 °C to 40 °C
Network Connection: Ethernet

[Tupsu]

You can put one extra fan for S5.

If you use 2x the original S5 fan, the ambient temperature may be  50 degrees Celsius.

[QuintLeo]

You have not yet explained why you need the best efficiency factor miners, If your electricity is free of charge.

 Only NEW miners available?

A/C directly will contain moisture

 An AC unit REMOVES moisture from the air it blows out.
 Most modern window AC units have a specific "dehumidify" setting.

 There is also a tray under the condenser coils, intended to collect and direct the water to somewhere "safe" - just make sure the drain from that doesn't go back into the room.

 Mixing the output of the AC unit into the incomming air should help some with temps, but use a 30 degree or 45 degree "merge" duct design don't just blow it at a 90 degree angle as that will tend to mess up your airflow a lot more than merging it in.

 Also, try to avoid the pair of 90 degree angles your picture is showing on the OUTPUT side, that WILL reduce the airflow. In fact, you would be better off pointing the output of the S7s directly at a room air fan (common Lasko designs flow around 1700 CFM with low backpressure) that is in a cutout on the side of the room blowing out.

blower I am using is my old ducted air con blower which is rated at 24,000Lt/m or 848cf/m

 The fans on the S7 are rated appx. 200 cfm, presuming they are the same fans used on most previous Antminer gear.
 More than 4 S7's WILL overload the capasity of that blower.

 Same for the S5, and probably worse for older units since they were LESS efficient than even the S5 was.

[AriesIV10]

You have not yet explained why you need the best efficiency factor miners, If your electricity is free of charge.

 Only NEW miners available?

A/C directly will contain moisture

 An AC unit REMOVES moisture from the air it blows out.
 Most modern window AC units have a specific "dehumidify" setting.

 There is also a tray under the condenser coils, intended to collect and direct the water to somewhere "safe" - just make sure the drain from that doesn't go back into the room.

 Mixing the output of the AC unit into the incomming air should help some with temps, but use a 30 degree or 45 degree "merge" duct design don't just blow it at a 90 degree angle as that will tend to mess up your airflow a lot more than merging it in.

 Also, try to avoid the pair of 90 degree angles your picture is showing on the OUTPUT side, that WILL reduce the airflow. In fact, you would be better off pointing the output of the S7s directly at a room air fan (common Lasko designs flow around 1700 CFM with low backpressure) that is in a cutout on the side of the room blowing out.

blower I am using is my old ducted air con blower which is rated at 24,000Lt/m or 848cf/m

 The fans on the S7 are rated appx. 200 cfm, presuming they are the same fans used on most previous Antminer gear.
 More than 4 S7's WILL overload the capasity of that blower.

 Same for the S5, and probably worse for older units since they were LESS efficient than even the S5 was.

The S5 fans specs are: external dimension: 120*120*38mm Weight: 128.5g Qty Bearing: Electrical characteristics Rated voltage: DC12V Rated current: 1.8±10%A Rated input power: 21.6Watt Operating voltage: 7 - 13．8V Efficiency Rated speed (range) 4450±10%RPM Maximum air flow 186.2 CFM Characteristics Operating temperature: -10℃～+70℃ Life expectance: continuous operation 40,000Hrs

[coinbeast]

You have not yet explained why you need the best efficiency factor miners, If your electricity is free of charge.

Is it because of greediness ?

I don't want to draw any more amps through my main switch because out of the 2 34A poles, one of them goes up to 40A whilst the hot water system runs after 12pm if we have all the A/C on. I don't want to tell my wife that she can't heat/cool the kids... Not a wise move

[coinbeast]

I'm sure most of us have dreamed of hiding these at our work but be cautious in doing so.  A/C directly will contain moisture as I'm sure the nights will where you live which may damage your miners.  So this is outside?  How are you connecting to the internet?

It is an outside toilet attached the the side of the house. There is sufficient cover from rain etc, but if people ever come looking around, I don't want there to be anything suspicious. It is really just me being over cautious. I wouldn't get fired, just maybe told that I shouldn't do it... and I don't want to not mine BTC I would do it if I didn't have free electricity.

It is mostly very dry where I love but we do have some summer storms here.

[/quote] How are you connecting to the internet?
[/quote]

I have an etherent cable running from my switch in the mining room to my modem.

You have not yet explained why you need the best efficiency factor miners, If your electricity is free of charge.

Is it because of greediness ?

This! S5+ is the way to go with free electricity atm, unless you have space issues?

I sold off all of my S5's in anticipation for the S7. It's a bit LOL because I now have 2 S5 cooling kits sitting here to never be used. I was using the maximum amps I felt safe using and I want to be first on board with the next generation of miner as to stay on top.

[coinbeast]

 The fans on the S7 are rated appx. 200 cfm, presuming they are the same fans used on most previous Antminer gear.
 More than 4 S7's WILL overload the capasity of that blower.

 Same for the S5, and probably worse for older units since they were LESS efficient than even the S5 was.

Thank you for picking up on that. I am now going back to drawing board because of this and the right angles in the design.

[coinbeast]

I have some really good 3000 cfm single phase fans I can use, but the more I think about it and the more complicated the design keeps getting, the more I am considering maybe throwing one of our 6kw A/C's  onto the side of the space panel box with the S7's inside it. The A/C and the heat from the miners should cancel each other out but I don't know if it will work that way and if I would need more than just equal parts heating to cooling.

That and having to make the house as insulated a possible as to not be thrown out of the house to sleep in the mining room if my family gets too hot inside.

[quakefiend420]

How about:

This is basically how I cool 10kw in my garage.  Which is sadly empty right now, all gear sold....

[coinbeast]

This is basically how I cool 10kw in my garage.  Which is sadly empty right now, all gear sold....

Yes, that's how I did mine through winter and it worked well.

Now that I am considering a larger fan, it won't fit into the window frame :

I am kind of stuck for ideas at the moment, next to putting a fat A/C onto it like I mentioned above.

[chiguireitor]

Hi, just read the OP and part of the thread, i'm sleepy as hell and can't read it all, however, living on Venezuela with relative humidity points between 50% and 90%, i can tell you, this idea totally works.

I have a location with around 15 S5, have an outside inlet mixed with a 24k BTU a/c, two extractors doing some hard work, and have the temperatures below 60ºC on the miners (on a 30-31 ºC day).

So yeah, go for it, any advice just ask and i'll fire right away.

EDIT: Ohh, also forgot to say, this mine is on a very quiet zone, and it is barely audible to the neighbors.

[Andaloons]

What about going to liquid immersion cooling?  I live in a hot/humid climate so I completely understand the dilemma!

I heard about these guys on a SovereignBTC podcast:

www.grcooling.com

[notlist3d]

Hi, just read the OP and part of the thread, i'm sleepy as hell and can't read it all, however, living on Venezuela with relative humidity points between 50% and 90%, i can tell you, this idea totally works.

I have a location with around 15 S5, have an outside inlet mixed with a 24k BTU a/c, two extractors doing some hard work, and have the temperatures below 60ºC on the miners (on a 30-31 ºC day).

So yeah, go for it, any advice just ask and i'll fire right away.

EDIT: Ohh, also forgot to say, this mine is on a very quiet zone, and it is barely audible to the neighbors.

Have the neighbors not complained?   Normally even barely audible to neighbors I would think would be to loud for that location.

[chiguireitor]

[...]
Have the neighbors not complained?   Normally even barely audible to neighbors I would think would be to loud for that location.

Have around 3 sqm that work as a sound muffler on both the cold and hot zone of my mine, and they reduce the miners' noise to whisper-level noise.

Also, have an awning that works as a sound barrier to the upper levels of the building (my mine is on the floor level).

[quakefiend420]

This is basically how I cool 10kw in my garage.  Which is sadly empty right now, all gear sold....

Yes, that's how I did mine through winter and it worked well.

Now that I am considering a larger fan, it won't fit into the window frame :

I am kind of stuck for ideas at the moment, next to putting a fat A/C onto it like I mentioned above.

Look for something called a squirrel cage fan.  Mine does about 1000CFM and exhausts through a space that's 12X5.

[quakefiend420]

What about going to liquid immersion cooling?  I live in a hot/humid climate so I completely understand the dilemma!

I heard about these guys on a SovereignBTC podcast:

www.grcooling.com

Probably too much trouble.  Just focus on moving lots of air, that's the cheapest way.  There's a reason why you never see mega-farms doing this, they all have massive intake and exhaust fans and just stack the miners on shelves.  If you can exchange the entire airspace of the room in a few minutes it never has a chance to get too hot....

[Andaloons]

Yeah, good point. Big fans and lots of air movement make cheap perfect sense.

[Sweminer777]

if you are stealing electriticy just overlock your machines.


Build a big box metal.

Make it look like a Server just all the miners in a box.


And if boss ask, tell him that you are doing some research for the work.


Do not try to have some Big bitcoin stickers or anything just hide it on plain sight, maybe put it on the balconi.


either this sounds like you are just to greedy, i don't think that they will care if it's "free" so you are most likely stealing and just trying to get good ideas from the enginers  here..

[coinbeast]

Let's keep the "free electricity" part out of the equation please people. I don't want us to get side tracked.

I only have 70A to use and when you are facing 45C plus days in a very big house that gets used up in A/C fast and I just don't people thinking I am growing pot or have my boss tell me to turn my miners off if the cost of electricity gets too high (and environmental policy is a big deal nowadays)  I have in my letter of offer that my house comes with free electricity, but MY policy is "If you have nothing to gain and everything to lose, then don't." So that means, I want to mine BTC and if someone tells me to stop, then I would have to go rent a place somewhere just to run my miners. It's just not feasible.

Now with that aside.

I have come up with a way to make a 'Dog kennel' to house an A/C and my miners.

It is a bit more complex than this but I have tried to simplify it so it doesn't appear too confusing. I apologise in advance if it is hard to get the picture.

[Sweminer777]

Let's keep the "free electricity" part out of the equation please people. I don't want us to get side tracked.

I only have 70A to use and when you are facing 45C plus days in a very big house that gets used up in A/C fast and I just don't people thinking I am growing pot or have my boss tell me to turn my miners off if the cost of electricity gets too high (and environmental policy is a big deal nowadays)  I have in my letter of offer that my house comes with free electricity, but MY policy is "If you have nothing to gain and everything to lose, then don't." So that means, I want to mine BTC and if someone tells me to stop, then I would have to go rent a place somewhere just to run my miners. It's just not feasible.

Now with that aside.

I have come up with a way to make a 'Dog kennel' to house an A/C and my miners.

It is a bit more complex than this but I have tried to simplify it so it doesn't appear too confusing. I apologise in advance if it is hard to get the picture.

Bitcoin is not for commiting crime.

If you want to steal electricity then plan it your self, if i did that i would figure it out my self.

You are just greedy and besides not even clever to figure it by your self. good thiefs do it whit no need of secondary help.


Greedy thief i propose to the community to not help out this guy.

it's more than clear that you are stealing the electricity..