Topic: ASIC + Air Conditioning = Safe? (Read 546 times)

That's my signal to lock the thread. Once the input stops being productive and there's users just blatantly posting 1-liners that make me facepalm, there's no turning back. The post directly above yours is discussing that air conditioning is not a feasible solution to the problem, for exactly the reason you say "if" about. The costs are way too high, and the effectiveness of the Air Conditioner for the job it is to accomplish would be abysmal. We've decided on exhaust fans, A/C's are better for personal comfort than for cooling your hardware.

air conditioner is the best solution for you
Of course if the cost not limited and wires not overloaded

I was thinking for some reason that the air conditioner was going to be less expensive. I was mislead by the "cooling" aspect, and I suppose I didn't put enough thought and consideration into the pressure and exhaust. I thought the air wouldn't need to be pushed out through an exhaust if it could simply be cooled. My physics knowledge needs some serious work, because I'm still a bit confused, but with more information to tackle the problem. It sounds more like the A/C is going to cut into my profits, increase ROI time and potentially completely negate the profits all together.

Does it matter where the holes are in orientation to the hardware or each other? I would have to make some holes and have them prove to be unhelpful. As you said though, might be better if I just make one and get a better feel for the whole idea.


All of the A/Cs I've had get run pretty much 24/7 all summer, never really had any problems. Have I been accidentally buying industrial A/Cs?

Seconding the fans vote. Also bear in mind if you choose aircon it'll be running flatout 24/7, which kills anything non-industrial pretty quick.

It does not need to match, for example, start with only one exhaust fan, if is not doing the job well then add another one and so on, if your exhaust fan is 50x50 then start with 3 holes 20x20, do not place the holes closer, thieves could find a way to link/connect them. After you do the first then you will understand it better cause theory is something, try it outs and see how it actually works is something else.


3.41 btu per kwh is a lot, I'd say, air conditioner is the safest and expensive, approximately which all depends, only one exhaust fan does the job of 5 air conditioners and uses only 300 watts hour instead of 5000 watts hour, so is a huge difference.

Air Conditioning won't do much good if you don't move that hot air out while the cool air is coming in it's about air flow and how you move it an were.

so that said

Air Conditioning if used right is very safe if you can afford to do it in other words it's the most costly way to do it . or not worth it unless your rich or have no power cost to worry about then it is very safe to do and the best way imo to do it but that's a debate so it's all about what your willing to invest and can afford till you see that ROI, if that's what your after .

I have a couple different options for mining locations, but right now a hole large than 20x20 would be extremely dangerous in my opinion. I don't want anybody (or anything) crawling through it to get to me or my stuff. The hole should match the size of the exhaust fan, is that right, generally? I know the sucking capability calculations are going to be more accurate, but just for estimation-sake.

I think I've got everything I need and expected from this thread. Very helpful discussion, and I've got a pretty clear picture about how to proceed efficiently, without damaging my hardware in any way. Metroid is the MVP here, sorry that I don't have any merit to dish out to ya. I'll probably be locking this bad boy, unless I think of another question or run into another related issue. Appreciate the help.

For passive intakes, I'd make the combined area 25% to 50% bigger than the exhaust fan. The greatest obstruction to air flow is at intake and exhaust, so if one of them is unpowered we can just make it bigger to reduce resistance. This is my experience from cooling polytunnels (hence rabbits, lol).

Just need to make sure to calculate the exhaust fan m3 air sucking capability and the hole for it, start with a small hole, if the intake air is only coming from the hole then is good, if the intake air is coming from the hole and other places then it means the hole needs to be bigger or make small holes only, need to watch out for thieves, holes larger than 20x20 is dangerous but if your place is very safe then I'd say larger holes are better.  A rule is, if you have a 50x50 exhaust fan then make a 50x50 hole but like I said before, it will depend on your exhaust fan sucking capability.

To put it more simply : "Heat rises." Have I gotten that complex concept down?  


Well I certainly don't have a warehouse, so we are talking about regular room conditions within a home or garage. Point taken, exhaust fans are sufficient in just about any scenario like the one we're dealing with. I'll save my AC, keep it in the bedroom and potentially just pick myself up an exhaust fan if need be when I add more equipment. Very helpful, Metroid, thanks a lot. I've even read like four different helpful Wikipedia pages, that have taught me more than a whole year in physics class.

Nice explanation Metroid,  I don't use an intake fans as I've created a window below of my mining room and were already hit the game

powerful exhaust fans should truly enough for it

with your detailed write ups you get a merit from me
 

You must be trolling here right? attic is closer to roof tiles(direct contact with the sun or ultraviolet rays) and that explains why is always hotter, also, within the house, the hotspot will always be the attic because is at the top of a collection of rooms, the hot air of those rooms will always go to the attic or to the ambient which is dependent how the attic was built, i mean to comport the hot air of all rooms going to it or not. The basement will always be cooler because is closer to earth ambient temperature and the air will always be denser underground and any hot air will be going up naturally. It is all about physics.


Concerning home rooms, intake fans is dangerous because that will make anything that is outside going to your room faster than ever and that should never happen, a very high positive pressure is never good for home rooms. Example, there was a person that placed an intake fan and an exhaust fan, the intake fan was adding more air than the exhaust would remove, for few days, it rained a lot and the air after few days was very humid inside the room and that started causing components and equipment to fail, you can read more about this here http://www.smartfog.com/humidity-in-computer-rooms-what-you-should-know.html

If is a huge warehouse, hardly a problem but you need to make sure there are failsafes if intake fans are pulling more air than the warehouse space can take it.

So the rule is simple, intake fans = exhaust fans on m3 air, we can't have negative pressure https://en.wikipedia.org/wiki/Negative_room_pressure and we cant have a positive pressure either https://en.wikipedia.org/wiki/Positive_pressure, we have to have something between it and that is why i said intake fans must be = exhaust fans on m3 air, what is coming in is going out but the method is pointless as you can have it only with exhaust fans as I explained before.

I forgot to ask in my last post, but I was also wondering this myself. What exactly are they a danger to? I didn't want to sound like a dunce, but I honestly cannot figure it out. Dangerous to overspend on electricity possibly? Increased chance of blowing a fuse, maybe.

Are they a danger to small children? Maybe mice? Is it rabbits?

They said that outside air will be cooler, then you said "Explain why the attic is hotter." Do you understand that you are saying the same thing? Heads I win, Tails you lose. Get it? If the attic is hotter than outside, than the outside air is cooler.

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"outside air will always be cooler or equal inside air, but never hotter"...Never heard of radiant heat? Explain to me then why an attic is hotter than outside ambient temp when not vented?

What are you smoking?  No need to be worried about moisture? Rigs will dry out?  You have no idea what you are talking about.  What exactly is it that you think an a/c unit does? It has two fans.  One blows supply air across a cold evaporator coil and the second one sucks air in and blows it across the condenser coil to push heat from the refrigerant to the atmosphere.  That heat was removed from the room. 

The only problem lies in an a/c unit that is not big enough to keep up with the heat load of the miners.  Then theres the power costs of the a/c to take into account.

I see. So it should be possible to run them outside, under shade, with inlet filtered, and no extra air handler required? An experiment of the peak summer.

I'm pretty clueless about all of this, so you're right in saying that we need to learn more about physics. If I paid attention in class I probably wouldn't need to even have this discussion. I had imagined this, because intake would only be necessary if there was a lack of airflow or something like that. As long as there is exhaust, the hot air will be escaping and the room will be cooling.


I just had an experience where outside ambient temp was 90F and my miners didn't increase in temperatures at all. ASIC chips stayed low 50C and GPUs staying high 60C without giving up any processing power. I probably don't even need anymore exhaust than I currently have with this being the case.


Correct me if I'm wrong, but this is because all of the air exiting will naturally be replaced, is that right?

If I had merits, Metroid, you'd be receiving one.

What comment is that? it will always be cooler outside, if not then you don't need an exhaust at all and that is partly if you have an air conditioner, ambient temperature is ambient temperature, outside air will always be cooler or equal inside air, but never hotter maybe you think even without air conditioner inside your house is cooler than outside if no computer is powered, nothing is powered, you wrong, inside your house is = air ambient temperature, the feeling is because the sun is not having direct contact to your skin or the heat the sun produces is being absorbed by the roof tiles, but concerning air, is all the same if nothing is working towards a change, for example if you have heating or cold coming out from things.

You trolls need to learn a lot yet about physics and alteration.