Bitcoin Forum

Dear miners,

I've just got 100 Antminer S5 ASICs for my first mining rig!

How much minimal cooling power (in cubic meters per hour) do I need to cool my rig?

Help me to calculate cooling system power please!


Best regards,

RussianMiner

Afaik the S5 fan is around 200 CFM, so do the conversion and you're good to go and pull the correct formula

Cooling should be expressed in terms of BTU or tonage for cooling..... for instance 1kwh equals 3,412 BTU. This is the amount of cooling it would take to offset the additional heat load created by your mining equipment. It is the same as any other datacenter... how you cool the air is up to you. If the air coming in is cool enough then you just need to exhaust the heat from the miners and intake fresh air from outside. The amount should be calculated using outside ambient air temp and a bunch of other variables

On some website is said that the fan of s5 has around 100cfm. Are you sure with 200cfm? Thanks!

it is closer to 200 then 100.  it is also nasty loud

Yes, ~200 at 4k.

This equals 339.80 cubic meters per hour (m3/h / flow rate)

WOW!

You started wrong way.  The correct way  is, buy from Hashnest.

Today you need "only" 150 BTC ,  to obtain 100 Antminer S5 hashing farm .

There is no need for cables, power supplies and cooling.
Everything is included in the price .
Ready for mining  after 72 hours from purchase.

Unfortunately, your mine is already stillborn and do not return the money what you have to spend and you need to spend more.

I have started right way!
I have much better electricity costs than Hashnest or any other cloud mining service! ;)

If you're using mechanical air conditioning, assuming a SEER / CEER of 10, you end up burning about 30% of the power your miners are using at the wall to keep the room temperature the same as if they weren't running at all.

 Most current A/C units I've seen the last couple years are AT LEAST 10 SEER, many closer to 12 - which would work out to needing more like 25%.


 It's not a matter of the flow through the miners, it's a matter of removing the heat, if you're going for a 'datacenter' model.


 The Fan in the S5 is a Delta PWM model, given the RPM on it I'm CERTAIN that it's their ~200 cfm unit. The "flow director" fin design IIRC is PATENTED by Delta, and I've never seen a non-Delta fan use it.

 "Nasty" loud is a matter for debate, they're NOT quiet but they're not much louder than a commmon room air fan at the same distance. They ARE higher pitched though, which might make them SEEM louder, but nowhere near as bad as the famed Delta 80mm 80CFM "screamers" or even the "one step down" 68CFM models I used to use on my Athlon XP machines (Alpha heatsinks, not the more-common but similar Swiftechs).

I use this
http://res0.graysonline.com/handlers/imagehandler.ashx?t=sh&id=5063569&s=n&index=0&ts=635307871163870000
http://res0.graysonline.com/handlers/imagehandler.ashx?t=sh&id=5063568&s=n&index=0&ts=635307871165270000

Master BL8800
7.800 m³/h

with Mitsubishi Electric S500 Inverter
http://thumbs1.ebaystatic.com/d/l225/m/mXu3dSE3VMV1WYwOBJK0zuw.jpg
http://www.acpd.co.uk/mitsubishi-s500-inverters.html
http://www.mcsworld.com/img/descriptions_dehumidifiers/desc_ventilator_bl6800_flexible_hose.gif

How many S5 do you have in the room?
How big is your room (m3)?

You do not take into account the additional costs.
You bought the wrong model for miners, at a higher price than those sold in six months ago.

I still think that this is the wrong way to go.
But this is your journey. Lots of luck with that!


there was 17 x SP20 and 25 x S5

Room size isn't tha important.

Flow design and rate is.

When designing your farms, let cool air enter from below and extract heat from above. Go with the natural convection of heated air, and you should be alright. If in doubt, contact an engineer that knows about thermodynamics.

So you say he should have bought from Hashnest and paid ~$0.096/kWh, as opposed to likely paying half that electricity price, in order to save "additional costs"?   You may be right about the timing to buy S5's at a premium, but you are way off base thinking he'd be better off with a cloud mining service for 100 S5's.  Anyone who is seriously looking at wiring in 60 kW of power is quite likely to get a rate better than $0.096/KwH, and the difference in price will more than make up for any additional costs.  Hosting costs would be over $4,000 per month, as opposed to $3,066/month @ $0.07/kWh, $2,190/month @ $0.05/kWh, $1,752/month @ $0.04/kWh, etc.

Anyone that actually suggests running a farm via cloud mining is either delusional or has something to gain from it.

How about ventilation?

http://yandex.ru/yandsearch?text=%D1%80%D0%B0%D1%81%D1%81%D1%87%D1%91%D1%82%20%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D1%8B%20%D0%B2%D0%B5%D0%BD%D1%82%D0%B8%D0%BB%D1%8F%D1%86%D0%B8%D0%B8%20%D0%BF%D0%BE%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D1%8F (http://yandex.ru/yandsearch?text=%D1%80%D0%B0%D1%81%D1%81%D1%87%D1%91%D1%82%20%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D1%8B%20%D0%B2%D0%B5%D0%BD%D1%82%D0%B8%D0%BB%D1%8F%D1%86%D0%B8%D0%B8%20%D0%BF%D0%BE%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D1%8F)

But if you really want to use an air conditioners...

http://yandex.ru/search/?text=%D1%80%D0%B0%D1%81%D1%87%D0%B5%D1%82%20%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D1%8B%20%D0%BA%D0%BE%D0%BD%D0%B4%D0%B8%D1%86%D0%B8%D0%BE%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F%20%D0%BF%D0%BE%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D1%8F&lr=65 (http://yandex.ru/search/?text=%D1%80%D0%B0%D1%81%D1%87%D0%B5%D1%82%20%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D1%8B%20%D0%BA%D0%BE%D0%BD%D0%B4%D0%B8%D1%86%D0%B8%D0%BE%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F%20%D0%BF%D0%BE%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D1%8F&lr=65)

Nobody will do it for free better than you.  ;)

I've bought  from hashnest over 300  x S5 . I earned from GHs sales and from mining.
From mining it was profit 25 BTC  I have taken out of its profits, and sold off.
Not a bad investment if you earn 1,000 euros a month.
............................................................................... ..........

Hashnest  $0.096/kWh

I do not believe, that it would be pay  only half of that hashnest price  - $0.043/kWh

My recommendation is ,  leave Chinese miners in China.
S5 is not good farm miner.  Most of them work well , however, there are many problematic S5 miner (may be 10% )


I repaired it during the warranty period and some problematic S5 miner sold in the local market.
So I have now  only  well-functioning S5 miners.

Hashnesti advantage is that you  can sell it at any time. They also lose less of their market value, You can sell small portions off one S5, selling by GHs

No packing, posting and maintaining packages. I know how much space you need for 100 antminer packages ..

When the end of the year advertised 20TH/s miners, then the next of them  the S5 is like USB stick or BFL Single  today.

 Depends ENTIRELY on where you are at. Many areas don't see that low of a rate PERIOD, especially after factoring all additional charges (where I live, the "Energy Surcharge + Energy Transmission Fee" combined add right around 4 cents/KWH NOT COUNTED IN THE BASE RATE at all times, making summertime electric rates run close to 15 cents/KWH with the POSSIBLE exception of a multi-MEGAWATT big user - winter rates depend on your usage but you'd have to be a BIG residential user to get noticeably under 10 cents/KWH).

 Some areas, you're under 5 cents/KWH at LOW usage.

 Some areas, you're lucky to get to 20 cents/KWH no matter what.


 By most electric company standards, 60 KW is NOT a big user, nor are they going to bother negotiating a special rate with that small a user.



 only thing I've seen mentioned to date on that sort of thing is a PREORDER for 1Q 2016 - which appears to be someone that is piggybacking off the KnC announced new "Solar" mining chips
 Problems there are:

 (1) no track record on the announcing company.
 (2) KnC has a POOR track record on long term reliability on at least some of their mining chips - especially their most recent Titan ones that tend to DIE a lot.
 (3) KnC itself is facing a ton of lawsuits, they might not even be around by 1Q 2016.
 (4) Even if KnC IS around they have made no announcement ANYWHERE that they plan to sell their "Solar" chips, which helps make that announcement look TOTALLY SCAM.

haha this is interesting im using close to 15kw and I put in an order for commerical rates this week , keeping my fingers crossed but i doubt they will approve it.

In my state though if i can get to 20Kw i will be guaranteed commerical rates of .06 cents /kwh but im not zoned for commerical
and even if i was i'd have to spend 1000s trying to figure out how to cool it , I guess i could do intake and exhuast fans from one side the other but i would probbly need an HVAC specialist to figure it all out.

When I was running my bookstore, I was a "commercial" account - and using 15 KWH/month at most (which is less than most residences), the largest part of that being my computer setup (which was serious overkill for a bookstore, it mostly got used playing games while I was waiting on customers to appear).

 Commercial is not ALWAYS "big".

Here's a tip, if you are in business (or have a friend in business) with medium to large demand, you may be able to  "piggy back" on their usage by telling the electric company you are opening a second location, would like the same commercial rate, but need separate billing to the off-site address.  I was able to do this with an off-site "office". YMMV