Topic: Mining server room (cooling development help) (Read 22824 times)

movin cool office pro 60. i have one in a colo room that needed extra cooling and it is top of the line.
paid around 9 grand by shopping around. 60000 BTU and keeps its resale value. Very flexible options
to direct cooling. Venting is easy. It is a 5 ton unit. A real work horse.

Seal each rack's shelf
intake cold in bottom corner exhaust top caddy corner.
Use this method for 1000watt grow lights.
It forces the cold air to rise through and across the hot cards and the hottest air is at the top where the other fan is sucking it out.
Also by sealing off the shelves you are decreasing the amount of air you need to vent every minute.
to whats inside the shelves rather than the whole room (the room will need some venting for sure but it wont be so hot you cant stand it,) and thus increasing the amount of times it gets "cycled" or "vented".Which is good.
A 6 or 8 inch duct to and from each shelf working at a solid CFM should do the trick. The intake air for this would most likely need to be chilled, but I dont know where you are. Northern finland or something you could just pull from outside, florida or something you will need some cooling my friend it is summer.
Might i suggest building one and getting an estimate of the heat produced and work neccessary to eliminate it.

All in all it is a cool idea and i wish i could do it.
No matter what though it can be done, just look at some sick data centers or huge multi level grows, both have extreme heat issues and both go down 24/7.

not sure about mobile nuke powerstation[but Russia plan start build/sell some soon], but using obsolete military bomb shelters and other former industrial underground [well-made]structures, for data-center/mining is good idea/investment/decision.
esp if that's really bomb-proof, ie, able withstand at least old bomb hits[not deep penetrators with active propulsion improvement tech].

Thanks for the input it is appreciated to behonest I work full time for me this Is a hobby for my bussiness partner this is his full time job and is sustaining living on bitcoins ! 100% payed off his visa and line of credit bought a butt load of investments and pays rent and utilities entirely with exchanged bitcoins


And will continue to do so for as long as he can

The reason I suggested commercial space is because of the need of constant expansion to combat difficulty unfortunately the last few massive jumps dropped the earnings down a fair amount but with the rise in value it evens out fairly well

You are learning that the cheapest kilowatt (as in kilojoules per second) is the one you don't use.

With careful mapping of your wiring, you may not need 200 Amp service. Your service is 100Amp, 240V. Each "branch" can supply 80 amps continuously. If you know for a fact that different outlets are on different sides of the branch circuits, you probably don't even need 240V plugs. You can check this by using a multimeter to check the voltage between the "hot" contacts in the sockets. If they are on the same side of the circuit, the voltage difference will be less than a volt. If they are on different sides of the circuit, the voltage difference will be 240V.

One thing you will have to watch for is power factor. Most my computers without active power factor correction have a power factor of about 0.67. That means that for every amp of current supplying power, I have half an amp of "wasted" current just heating the wiring. What that means for you is that you should derate each circuit by the power factor of the load. For example, on a 15 Amp circuit, you are allowed to draw 12 amps (multiply 15 by 0.8) continuously. If your load has a power factor of 0.67, you would multiply that 12 amp rating by 0.67: giving 8 amps delivering actual power (960Watts). I recently bought a 380 Watt power supply with active power factor correction: it cost me just over $45 (a little over your budgeted $20 per machine).

You can free up about 40 amps (well, 32 Amps after derating for continuous load) by replacing your electric stove with a gas stove. You can then get an electrician to pull the 240 volt connection over for the AC or even running some of the machines.

Of course, renting actual commercial space is a option. However you should really consider whether you consider this a hobby or a business. If it is a hobby, you don't need every last machine running. You may even want to have a few on standby and only run them if the difficulty level network hash rate drops for whatever reason (or in the event of hardware failure). If you consider it a business, you may need to consider getting a business license. Miners should also be aware that there are only about 50,000 "winners" (blocks) every year.

Cool. Can't wait to see the video or any future pics

pwnyboy nailed it on the head it is not about the long term savings its about getting as many machines up as quickly as possible to combat the aggressive rise in difficulty the other issue with running 4 cards rather then single cards is proper cooling (for us)

we opted air displacement for cooling and thus far we are maintaining a average of 65 degrees across all the cards

sadly we have to make due with our 100 amp drop as epcor wants to rape for 100+ amp drops transmission fee's and cost of dropping the line and a bunch of crap it's retarded quick math actually shows if

we have a bunch of cards sitting asap it's cheaper to rent a apartment with free utilitys and house the new machines there with the ones we are currently running .. thou with the forming of a small Edmonton based bitcoin group im going to setup a meeting seeif people would be intrested in leasing commercial space from a fellow i know with a 450 amp drop to the location already built for houseing servers with security and fire suppression and cooling

-J

this weekend i shall try and put together a video showing all the rigs

I think he's going to need more BTUs. Maybe two of these:

http://www.newegg.com/Product/Product.aspx?Item=N82E16896865291

http://www.newegg.com/Product/Product.aspx?Item=N82E16896808070&cm_re=air_conditioner_portable-_-96-808-070-_-Product

8000btu portable air conditioner $229 + free shipping

I don't know if I agree with that.  I've noticed that cramming 4 cards into one box puts off a lot more heat than a single card in the box.  Might be a wash with the fewer CPU's/PSU's though...

But you also deacrease your footprint by 4 times as well, which allows for more efficient cooling and then you not only gain the power savings of going from four to one systems, but also the gain in going from four crappy PSUs to one decent. it's all a trade off. Personally i'd go for a more dense system.

The OP decided on the one-card-per-box strategy for all of the new deployments because he could get machines for something like $20 each (see previous pages in this thread).  It could be argued that when you multiply that figure out by 4, he could've bought one of those MSI boards with slots for 4 cards, plus a low power Sempron for maybe $240 versus the $80.  But the power savings would likely take 6 or so months to pay back the difference.. and one could argue that it's a wise move to pay the difference in power in the short-term, if his goal is to get as many rigs up as he can with a given budget constraint.  I'd likely employ the same strategy if I were him.

So each machine only gets about 500 Mh/s ? Seems like there is a LOT of room for improvement here.

Its all in the works 27 miners are up ATM but there all in cases ATM the others are a work in progress were are having issues getting enough power to our location ATM so were looking into other options As for The last poster WTF are you talking about man are you on glue ?

My power bill comes in at 700/mo. Right now

I'm currently at current difficulty mining average 35 btc a day ...

Do the math it is certainly worth it for me to mine and expand my mining operations and I put aside a certain % dependent on a few variables for expanding my mining operation to stay ahead of the game right now I'm operating at zero loss what so ever and a rather large net. Profit


So yes I know something you obviosily don't mining is profitable

Remember to put this on youtube after your done building it.

for mining that's OVERKILL!

Question is are you that stupid to invest in this at this time or you know something we don't? Please do tell!
All distributed computing projects I know are unpayed, made for dumb people that don't get they're being used, so maybe I'm missing something...

PS. I wonder why you ask about cooling ... when the answer is obvious ...

LOL, mug... you've only got a month at best before this becomes unprofitable... that's if the price does not change and the we continue getting similar increases in difficulty.

I hope I am wrong, as it would be nice to make a bit more than a few hundred dollars profit from this.

Oh geez. I didnt even read the whole thread. In a former life I ran a 10,000 sq ft data centre, and build cluster computers for many different outfits.

Luckily we had real budgets so we bought AC's and proper server rooms.

Cheaper solution is to use environmental cooling. see intel's site for more info on that.

You can move regular temperature air in, just gotta move more faster (exponentially) as the temp diff between outside air and your cards is lower (course ,the cards
will just get hotter if you arent cooling them enough, then fail or otherwise). Obviously having them throttle down based on operating temp will keep your investment safe.

Try to keep your exhaust air from incoming air as seperate as possible - duct away from the cards as you can. Beware however, if there's a failure of incoming air for any reason,  your ducting may insulate your cards from new cool air, and you'll quickly achieve burnout (or possibly fire)? One way to do this is to keep two air moving systems on the same circuit as the rig itself, so if the power goes out then everything is off, not just the AC/air mover. You dont want your gear in a small box with a tiny air buffer that it can heat up to very hot in a short time while still powered. Thermal trips on the mobos will also help of course, they can just shut off the whole system if too hot.

Ducting upwards is a good way to keep exhaust from one row away from the next. (course you need to get it back away from the shelf as per the diagrams first, so back, then up), so you need incoming air coming from the 3rd dimention, from the side, then thru the back, then up and out, then there's no mixing of air, or exhaust air becoming input air to the next row. (You could also have air coming in the bottom, but now you're talking raised floor).

Im thinking at approx 0.7-0.9W/W to cool with a professional chiller, that it isnt worth it. Cheaper to throttle on hot days and use ambient air. 1.8x the cost of power is a big increase in cost.

a 1 ton chiller will cool 12000 BTU/hr, or about 3500W of cooling ish. That will cool 4000-5000 W of dissipated heat. a 1 ton chiller is about $5000 USD new in places, i see some for $3k used. Install is going to be at least that (then count shipping).

 http://www.dimplexthermal.com/UsedChillerStore.aspx

15 ton for $18.5 K, add in $5-8k for ship/install assuming you have some power busses in place already for 3phase etc. Pushing $25K gives you cooling using ~50kva for 60-75,000VA (depending on many factors). 50kva is about $6.25/hr in my market (assuming you're not enjoying industrial rates, in which case it's about 60-90% of that), which is ~$30/day or ~~$1k/mo. not huge, the capital cost and install will beat operating in amortization for 24 months or more.

However, I think bigger blowers will give you more ambient environmental air, just gotta clean your gear more often. Itll turn black if you're in a city/near any roads due to diesel particulate. Pretty gross.
Filtering the air just means lower airflow due to backpressure/drag. Cleaning is cheaper Doesnt affect operation for the most part, unless your fans are getting gummed up. Watch for humidity issues however in very dry climates/winter, could get static and sparks and dead gear. Wetness wont be an issue if the room is always 20F > outside... however, gear may really suffer when its 90F out and 110-130F inside. So will the humans.

To add to this, I would think regular plywood for the partitions, assuming the original scheme as depicted in the OP's drawings is used.  You could go as far as to space the plywood off of the shelving with a 2x4, this would give you almost 2" that you could use to staple insulation to the inside of the plywood.  You can hinge the plywood at the top, where it fastens to the 2x4 beam, to make the shelves accessible by simply flippling the plywood up.  If the shelves are made of a solid material as-depicted, I'd envision ventilation ducts for input and output attaching to each side of the shelf ends (so at a 90 degree angle to the plywood which runs the length of the shelf, input at one end, output at the other end).  This would also be extremely easy to build up and test because you could do it with just one level of one shelf.  If you settled on a good vendor for the fans (like some place akin to Walmart) which sold fans with a rated CFM, you could test, adjust, test some more, and have a pretty good idea of how your system will perform using the delta T calculation provided above.

But that's merely conjecture, and math is hard.  It's much easier to just go shopping for video cards and ignore the details.. yanno?

That Hyperiod mini nuclear reactor is really cool. I'd definitely get one if I was super rich. I bet that the thing costs millions of dollars so I don't think it's within the reach of even the most hardcore bitcoin miner.