Novec 7000 Project [immersive evaporating cooling] - page 2.

user27

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Quote from: allcoinminer on July 30, 2014, 03:14:43 PM

Whats the life expectancy of this liquid?

It is stable so in theory there is no limit; however depending on your setup you will always see some loss from either opening the tank or from leaks, expansion, contraction of the gas in the process. All these things can be reduced with better seals, bellows to allow expansion without venting and so on but it is very difficult to eliminate all losses/

1% per month is a number I have heard banded around but I have a buddy running this stuff and his losses are higher that that so far.

u27

allcoinminer

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Quote from: mangodream on July 29, 2014, 05:33:30 PM

Update, I just received 6L of Novec 649 but tomorrow i'll go to Deutschland for a couple of days, next week i'll make you some pics of all the stuff working. See you there Wink

Whats the life expectancy of this liquid?

mangodream

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Update, I just received 6L of Novec 649 but tomorrow i'll go to Deutschland for a couple of days, next week i'll make you some pics of all the stuff working. See you there Wink

user27

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Quote from: cozk on July 17, 2014, 01:51:29 PM

Mega waste of time and money.

Gratz

This guy has clearly done his reading thoroughly; I can't see any reason to question his conclusion/

tntdgcr

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Quote from: cozk on July 17, 2014, 01:51:29 PM

Mega waste of time and money.

Gratz

not at scale it's not.

jimmothy

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Quote from: cozk on July 17, 2014, 01:51:29 PM

Mega waste of time and money.

Gratz

I don't think you're understanding this technology fully.

The whole point is to save time and money.

Cooling the electronics better than any other method is just an added bonus.

cozk

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Mega waste of time and money.

Gratz

aerobatic

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Quote from: sang on July 15, 2014, 11:23:12 PM

Quote from: mangodream on July 15, 2014, 08:07:01 PM

I'm just waiting my FREE (yay !!!!) Novec 7000 and 7100 delivery, i'll put 9 Gridseed Blades in it, so 18 PCBs very close to each others. I'll mix the 7000 and 7100 together to have a perfect boiling point at 47,6 °C. 34°C is nice for the GC3355 chips but too low for coils and things, and 61°C is too hot for the chips. So i think we can get the best results when mixed up Grin

I'll post some pics when making all the stuff Wink

I would strongly advise not mixing these fluids until you speak to a 3m engineer. They may very well not mix at all and just settle on top of each other - depending on the properties.

Also, you really suck. :-)

I was told by a 3m engineer you can mix them to dial in any boiling temp you want.

user27

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Quote from: mangodream on July 16, 2014, 11:29:48 PM

The 3M guy told us that we can mix them together since they use the same chimical elements. But you can't mix a 649 with any 7000 series liquid, it's not the same chemical
It's designed that way so you can select the perfect boiling point for what you want to cool.
But the guy wasn't an engineer, just a representant. Wait and see, i sendt a mail to the 3M staff, my Novec will be delivered within one week, so i have the time to verify if it's true or not

I'll give you the truth from them Wink

If it's false, idk, i'll have some liters for something else, maybe my Zeus miners.

I have them for free because a friend of mine who owns a datacenter told them that he must do some tests of this kind of application and if it works like expected and not a pain to install and set up all the entire system, he will order a lot more of Novec for cooling his entire datacenter... so, yeah, they're interested as fuck for the deal Grin

He could well be right but I would be wary of this advice; if it were so simple why do 3M sell 34 61 76 98 128 boiling points and not say a 50 which would save a lot of people mixing?

u27

mangodream

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The 3M guy told us that we can mix them together since they use the same chimical elements. But you can't mix a 649 with any 7000 series liquid, it's not the same chemical
It's designed that way so you can select the perfect boiling point for what you want to cool.
But the guy wasn't an engineer, just a representant. Wait and see, i sendt a mail to the 3M staff, my Novec will be delivered within one week, so i have the time to verify if it's true or not

I'll give you the truth from them Wink

If it's false, idk, i'll have some liters for something else, maybe my Zeus miners.

I have them for free because a friend of mine who owns a datacenter told them that he must do some tests of this kind of application and if it works like expected and not a pain to install and set up all the entire system, he will order a lot more of Novec for cooling his entire datacenter... so, yeah, they're interested as fuck for the deal Grin

user27

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Yes, please explain free; I have only ever been able to get hold of very small samples.

Mixing them is very unlikely to work; I imagine you would just boil off the 7000 first even if they do mix. Same as distilling alcohol from mash; even when mixed you can cause the alcohol to evaporate leaving the water behind.

u27

sang

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Quote from: mangodream on July 15, 2014, 08:07:01 PM

I'm just waiting my FREE (yay !!!!) Novec 7000 and 7100 delivery, i'll put 9 Gridseed Blades in it, so 18 PCBs very close to each others. I'll mix the 7000 and 7100 together to have a perfect boiling point at 47,6 °C. 34°C is nice for the GC3355 chips but too low for coils and things, and 61°C is too hot for the chips. So i think we can get the best results when mixed up Grin

I'll post some pics when making all the stuff Wink

I would strongly advise not mixing these fluids until you speak to a 3m engineer. They may very well not mix at all and just settle on top of each other - depending on the properties.

Also, you really suck. :-)

ThomasCrowne

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Quote from: jimmothy on July 15, 2014, 08:21:07 PM

Quote from: mangodream on July 15, 2014, 08:07:01 PM

I'm just waiting my FREE (yay !!!!) Novec 7000 and 7100 delivery, i'll put 9 Gridseed Blades in it, so 18 PCBs very close to each others. I'll mix the 7000 and 7100 together to have a perfect boiling point at 47,6 °C. 34°C is nice for the GC3355 chips but too low for coils and things, and 61°C is too hot for the chips. So i think we can get the best results when mixed up Grin

How did you get it free??

Also are you sure you can just mix the fluids like that? Why not use novec 649 which boils at 49C?

Yes please...do tell!

jimmothy

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Activity: 770

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Quote from: mangodream on July 15, 2014, 08:07:01 PM

I'm just waiting my FREE (yay !!!!) Novec 7000 and 7100 delivery, i'll put 9 Gridseed Blades in it, so 18 PCBs very close to each others. I'll mix the 7000 and 7100 together to have a perfect boiling point at 47,6 °C. 34°C is nice for the GC3355 chips but too low for coils and things, and 61°C is too hot for the chips. So i think we can get the best results when mixed up Grin

How did you get it free??

Also are you sure you can just mix the fluids like that? Why not use novec 649 which boils at 49C?

mangodream

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Activity: 672

Merit: 501

I'm just waiting my FREE (yay !!!!) Novec 7000 and 7100 delivery, i'll put 9 Gridseed Blades in it, so 18 PCBs very close to each others. I'll mix the 7000 and 7100 together to have a perfect boiling point at 47,6 °C. 34°C is nice for the GC3355 chips but too low for coils and things, and 61°C is too hot for the chips. So i think we can get the best results when mixed up Grin

I'll post some pics when making all the stuff Wink

user27

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Activity: 266

Merit: 250

https://bitcointalksearch.org/topic/m.7865759

user27

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Activity: 266

Merit: 250

Quote from: lkthomas on July 11, 2014, 05:42:37 AM

I just wondering, in a close loop system, if bottom is the miner board, top is radiator/condenser, would it work this way? or I need to have two separated system (Novec + miner = first system; Radiator + fan module = second system) and link up with an aluminum plate to do heat exchange?

One system is fine; water loop just moves the heat from the condensing rad to the cooling rad.

EDIT:
A friend has managed to get a Neptune board up and running in Novec 7100 now:

lkthomas

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I just wondering, in a close loop system, if bottom is the miner board, top is radiator/condenser, would it work this way? or I need to have two separated system (Novec + miner = first system; Radiator + fan module = second system) and link up with an aluminum plate to do heat exchange?

user27

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Quote from: RoadStress on July 11, 2014, 03:31:30 AM

What's the price of the N7200?

Last I checked £248 for 5.4kg / 4L.

RoadStress

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Quote from: user27 on July 11, 2014, 03:00:28 AM

Quote from: DeathAndTaxes on July 10, 2014, 02:01:10 PM

Both 7000 and 7100 can be used with the same closed loop system. The point is that the larger the difference between ambient (i.e. outside) temp and the condensation point of the working fluid the more efficient the operation. Now obviously a fluid which boils at 400C would be very efficient but it would also mean the processors would be 400C as well which wouldn't be good. So the optimal working fluid in a two phase immersion cooling system is one with the HIGHEST boiling point which is still maintains the processors at an acceptable temp.

Yep, 34 (N/7000) is not really workable but 61 (N/7100) is fairly easy to condense and also a good working temp for chips; I would not be comfortable at 98 (N/7300) but 76 (N/7200) might be workable once the cooling is dialed in.

Higher boiling point also increases the usefulness of the hot water returned.

u27

What's the price of the N7200?

Topic: Novec 7000 Project [immersive evaporating cooling] - page 2. (Read 26660 times)