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Topic: Novec 7000 Project [immersive evaporating cooling] - page 2. (Read 26667 times)

sr. member
Activity: 266
Merit: 250
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
hero member
Activity: 784
Merit: 504
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?
hero member
Activity: 672
Merit: 501
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
sr. member
Activity: 266
Merit: 250
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/
full member
Activity: 219
Merit: 100
Bitcoin Mining Hosting
Mega waste of time and money.

Gratz

not at scale it's not.
hero member
Activity: 770
Merit: 509
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.
hero member
Activity: 812
Merit: 500
Mega waste of time and money.

Gratz
hero member
Activity: 702
Merit: 500
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.
sr. member
Activity: 266
Merit: 250
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 Smiley 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
hero member
Activity: 672
Merit: 501
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 Smiley 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
sr. member
Activity: 266
Merit: 250
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
sr. member
Activity: 282
Merit: 250
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. :-)
full member
Activity: 210
Merit: 100
★☆★ 777Coin - The Exciting Bitco
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! Smiley
hero member
Activity: 770
Merit: 509
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?
hero member
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
sr. member
Activity: 266
Merit: 250
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:

newbie
Activity: 35
Merit: 0
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?
sr. member
Activity: 266
Merit: 250
What's the price of the N7200?

Last I checked £248 for 5.4kg / 4L.
legendary
Activity: 1904
Merit: 1007
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?
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