Using Nanofluids to Increase Heat Transfer

[superart]

I read an article today about some research being done where nanofluids are used in a watercooling loop in order to improve performance.

The term nanofluid refers to a liquid that has metallic nano particles suspended throughout. These particles are usually less than 50nm in size.

This particular article uses water and ethylene glycol (alcohol) as the continuous phase fluid, and Al2O3 as the nano particle.

The research is still ongoing, but the preliminary test results look very very nice. I have attached a graph and chart that compares nanofluids at various concentrations and various flow rates. It seems that thermal performance increases linearly with concentration of nano-particles.

[ToasterIQ2000]

I'm curious enough to (whimsically) want to know the source pictured; Author(s), Journal Name, Date, Page Numbers...

I have no Deep [ Fat ] Fryer or Vacume Pack Sealer.

[Etacovda]

I wonder what it would do to your average pump...

[superart]

Originally Posted by ToasterIQ2000

I'm curious enough to (whimsically) want to know the source pictured; Author(s), Journal Name, Date, Page Numbers...

I have no Deep [ Fat ] Fryer or Vacume Pack Sealer.

ElectronicsCooling
Vol. 10, Num.4
November 2004
Nguyen, Roy, Maïga, Lajoie
P.38 - 40

Originally Posted by Etacovda

I wonder what it would do to your average pump...

I emailed the author asking that. He says that after extended time using this stuff, it still hasn't inflicted any noticeable damage to his pumps or any other equipment. Most likely this is due to the fact that these particles are so tiny, they really cant do much damage.

[Keldon]

What effect would these nano particles have in the viscosity of the fluid?
That might kill your flow, if not your pump...

[superart]

hmm. good question.

I would assume not much.

Think salt water or sugar water. Vicosity doesnt go up that much, and these particles are even smaller.

[Starman97]

I'd say it all depends on the shape of the nanoparticles..
if they are spherical, they could act as ballbearings and
create almost no wear, they might even reduce friction losses.

But if they are angular or cubical, depends on how they are formed,
they could be crystalline shapes natural to Al2O3, they are going to
eat up any moving contact points, like seals or impeller bushings.

Al2O3, isint that the same sort of aluminum oxide used in abrasives?
If so, it's hard as hell, it could chew through any metal.

[ToasterIQ2000]

My frontal lobes thank you.

http://www.electronics-cooling.com/h...techbrief.html

[superart]

Originally Posted by Starman97

I'd say it all depends on the shape of the nanoparticles..
if they are spherical, they could act as ballbearings and
create almost no wear, they might even reduce friction losses.

But if they are angular or cubical, depends on how they are formed,
they could be crystalline shapes natural to Al2O3, they are going to
eat up any moving contact points, like seals or impeller bushings.

Al2O3, isint that the same sort of aluminum oxide used in abrasives?
If so, it's hard as hell, it could chew through any metal.

I supose it could, in theory, inflict some tiny microscopic damage, but if it doesnt effect performance or reliability, do we really care? I'm not trying to be a smartass, would/should we care about small tiny erosion if it doesnt eally effect anything?

[jaydee]

I assume even nano particles will build up over time. Especially if there is a large enough amount to actually effect thermal conductivity.

Anyway if this stuff ever came out it would be so expensive normal people like us wouldn't be able to afford it anyway.

Hell, plain water still hasn't gone mainstream. We still have to wait for air to stop working and then go through years of mainstream water cooling evolution and then it will be better liquids. This is provided the CPU companies stay on track of making hotter CPU which seems to not be their goals.

[superart]

Originally Posted by jaydee116

I assume even nano particles will build up over time. Especially if there is a large enough amount to actually effect thermal conductivity.

Anyway if this stuff ever came out it would be so expensive normal people like us wouldn't be able to afford it anyway.

Hell, plain water still hasn't gone mainstream. We still have to wait for air to stop working and then go through years of mainstream water cooling evolution and then it will be better liquids. This is provided the CPU companies stay on track of making hotter CPU which seems to not be their goals.

yea, but its still cool.

hehe getit? cool.....cool....

[jaydee]

Originally Posted by superart

yea, but its still cool.

hehe getit? cool.....cool....

It is indeed. What if they used silver or diamond nano particles?

[superart]

I suggested that to the guy doing the research in an email. He said it was intriguing, but at this time, he can only obtain aluminum oxide and copper oxide despersions, amung a few others, but those wouldn't be ideal for use as a coolant.

[UNDERBYTE]

Originally Posted by jaydee116

It is indeed. What if they used silver or diamond nano particles?

Make your own colloidal silver -Just have to get the concentrations up to 50,000ppm


http://chetday.com/colloidalsilvergenerator.htm