ahh so ur one of the shill accounts spamming?  look at the list if you spam nonsense u wont get paid

received my weekly payment and confirmed by bitcoin network
thanks XBTec for payment
and if you have free time, maybe you should make new full member and sr.member design for this signature campaign
this current full member signature "not very colorful" compared to other signature campaign in my opinion
colorful signature help to get more exposure

I just hate being kept waiting and when times keep getting moved up.

In my opinion, XBTec should just pay what he said he was going to pay this week, and he should pay it asap. Because it's already late.
It's not our fault that you didn't give yourself enough time to check over the posts for useful content. Just make sure to check next week, before the day of payments so it's not delayed again.

A lot of them are. But it also seems like you're doing the same thing, as you're posting a one-liner with little content complaining about getting rid of jr. members and accepting sr. members.

He can look to see which members are posting said 1-liners, and so he can ban them accordingly. But those making constructive posts should be allowed to remain in the campaign.

Example of spammer: Joca97. Got .05 payout via swarm of one-liners, with no content whatsoever. I hope any campaigns that accept him in the future realize this is what he does.

Rest assured he doesn't know what he is talking about. Boiling is not cavitation.  Cavitation is the sudden formation and violent supersonic collapse of vapor bubbles following quick swings in pressure such as one encounters in the water flowing from pressure to suction side of a propeller or impeller in water.  It can also be cause by tortuous bends in pipes, etc, anywhere a volatile liquid flows through wild pressure gradients.

And no, nobody needs to wear respirators and tanks are routinely wide open

jimmothy is right, Novec is also used as fire extinguisher, including operating theaters and other places, and also a couple of medical applications. I'd be rather worried about a few of the hundreds of fumes that are released when a PCB burns down or an ATX power supply, cable, connector etc.

How so? Novec fluid has very low toxicity and is nonflamable (even used in fire extinguishers).

I've also never heard of cavitation being a problem. Got a source for that?

Also any progress on the pacific 2000? Shipping date? Power consumption at the wall?

This looks like oil immersion. And more like a home built tank without lots of design experience (PC, cable binders, PVC tube). I've seen far better stuff on youtube, mostly gaming rigs but also a few Bitcoin rigs. There are already commercial systems available (Green Revolution Cooling).

Oil is unfortunately a bad idea except if you like tinkering with a small system and a mess at home. Better to stick with air cooling IMHO if you are not in a hot environment to begin with. I've been working around oil tanks for years and everyone who has ever used it hates it. It was the only option for a few years, but now there is 2-phase immersion cooling with 3M Novec Engineered fluids as used in the ASICMiner system. It will soon be the only immersion cooling around.

For serious (as indicated the * in the image) as in commercial miners, oil is unusable. It may look cheaper on the surface, but it's a bloody mess and you only need very little Novec to cool compared to oil. 200cc Novec for 4kW of heat (the cost of a coffee at Starbucks or less than a pizza?).

So, unless you are loaded with cash and have a maintenance team with rubber boots and rubber gloves to keep the oil cooling system running, or you like looking at a greasy mess in a fish tank,  it's really a bad idea.

Here are a couple of reasons why:

- Oil is good at storing heat, that's why they put it in oil heaters (oil radiators)
- You need oil pumps, or your chips will overheat (noise, maintenance, energy)
- Oil cooling still needs the heatsinks, so what's the point?
- You can't use thermal grease, need expensive indium foil instead (still good with QNF probably and silicon pad -> BE200)
- Oil comes out at the other end of the cable ;-) (capillary effect)
- Get used to rubber gloves and rubber boots, lol
- The oil absorbs all sorts of stuff, needs to be changed
- You need to wash your hardware with dishwash liquid (I am not making this up)
- You spend a lot of time cleaning, and the freaking oil just doesn't go away
- Oil pumps fail, just like fans, oil filters need replacement

A couple of other things on safety/security:

- Fire department, insurance, and data center is not going to like it.
- If you follow the rules, you need secondary containment or you risk the authorities shutting you down
- You need to disable water sprinklers (flames, water and oil, get it?) or you risk the authorities shutting you down
- If you disable the water sprinklers, they still shut you down
- Oil is dielectric, but it's also a static accumulator. Sparks and oil are bad
  (earthing your system is extremely important, so is electrical wiring and good quality power supplies)

- How many gallons of mineral oil do you need for 5PH?
- Most countries require a license to "store" such amounts, even for transporting it in a car/truck (separate license)
- Where do you dispose it? Needs to go to a licensed company as well

For oil cooling, in addition to all the oil pumps and water pumps (there are heat exchangers), you need to use an evaporative cooling tower (wet tower). This means you constantly need to refill water, which costs money. Worse than that, the evaporative cooling towers are extremely messy because they are open and bacteria grows in them. That's why in some countries they are regulated and they can't be put near people/windows (people get Legionnaires' disease from them). You need to add chemicals, and you need to clean them once a month or so. That's why you need two (unless you don't mind shutting down your mine for a half day or so while you clean up the mess). In a small system (gaming PC) you can use a radiator instead, but what's the point if you are spending more energy instead of less?

Cooling tower cleaning:
http://www.youtube.com/watch?v=49KVBk-2wP8

Example of oil mining rig that actually consumes _more_ electricity than less:

http://www.youtube.com/watch?v=EpNERMxvPTk

(radiator, pumps, spinning fans, etc)


if you look at the best and most expensive oil cooling systems around (ie. Tsubame-KFC, a 30kW system at some university in Tokyo, it's the no. 1 on the Green 500 list) you get a PUE of 1.15 (15% for oil cooling) in October (when it's relatively cool in Tokyo). With passive 2-phase immersion cooling you get a PUE of less than 1.01 (less than 1% for 2-phase cooling) even in the desert. And all that with a lot less stuff (no heatsinks, no oil pumps, etc).

Tsubame-KFC: http://www.titech.ac.jp/english/news/2013/024456.html
PUE (Power Usage Effectiveness): http://en.wikipedia.org/wiki/Power_usage_effectiveness

In summary, oil cooling is immersion cooling of yesterday. 3M Novec/DataTank is immersion cooling is immersion cooling of today and the future. Going back to oil cooling makes no sense. Ask any oil and gas company that tried it for HPC - if even the well funded oil and gas companies don't like oil cooling, that should teach us a lesson ;-)

There are probably a few more downsides, but it's 4AM so I may forget a few points. Going to sleep!

So you accept all, thats really so kind.

Yeah its rly cool. But Stunna paid .5 btc for that design.
He is not to much online atm i guess its ok to use it till u get reply.
Cloudbet and some othes use the same design now.
Its pd design and i think u guys should ask to use it. And i think Stunna will alow that.

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