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New Thermal Management

Quote:

The patented technologies - synthetic jets that rely on trains of turbulent air puffs and a system that uses vibration to atomise cooling liquids such as water. . .

Simple and with no friction parts to wear out, a synthetic jet module in principle resembles a tiny stereo speaker in which a diaphragm is mounted within a cavity that has one or more orifices. Electromagnetic or piezoelectric drivers cause the diaphragm to vibrate 100 to 200 times per second, sucking surrounding air into the cavity and then expelling it. The rapid cycling of air into and out of the module creates pulsating jets that can be directed to the precise locations where cooling is needed. . .

Though the jets move 70 percent less air than fans of comparable size, the air flow they produce contains tiny vortices which make the flow turbulent, encouraging efficient mixing with ambient air and breaking up thermal boundary layers. . .

For those higher demands, Innovative Fluidics has licensed technology known as vibration-induced droplet atomisation (VIDA), a system that uses atomised liquid coolants, such as water, to carry heat away from components. Also developed at Georgia Tech by Glezer's group, VIDA uses high-frequency vibration produced by piezoelectric actuators to create sprays of tiny cooling liquid droplets inside a closed cell attached to an electronic component in need of cooling.
The droplets form a thin film on the heated surface, allowing thermal energy to be removed by evaporation. The heated vapour then condenses, either on the exterior walls of the cooling cell or on tubes carrying liquid coolant through the cell. The liquid is then pumped back to the vibrating diaphragm for re-use.

I'm not sure if you guys heard about this, but I wanted to post it anyway to hear your thoughts about the potential of this new thermal management. What are your thoughts?

I love blank statments like this:

Quote:

'A system like this could work in the avionics bay of an aircraft,' said Samuel Heffington, a research engineer in the School of Mechanical Engineering and director of technology development for Innovative Fluidics. 'We have so far been able to cool about 420 watts per square centimetre, and ultimately expect to increase that to 1,000 watts per square centimetre.'

What exactly does "cool" mean? Does it mean cooling 420 watts from 100C to 95C? Or 100C to ambient? And there is no example's of what they have done? Sounds good, but untill some practicle examples of it working are shown who knows?....

I've read a few things about it (it does appear once in a while) , and it stated the removal between 100 W and 120 W at a temperature of approx 100 º C. Further testings bla bla bla ... aiming at sub 100 º C tests.

PS: Very ambiguous info on a few search's i've done.

Quote:

Originally posted by jaydee116
I love blank statments like this:

What exactly does "cool" mean? Does it mean cooling 420 watts from 100C to 95C? Or 100C to ambient? And there is no example's of what they have done? Sounds good, but untill some practicle examples of it working are shown who knows?....

"cool", I've come to accept over time when it relates to electronics, means to keep something at no higher than 100C given ambient conditions of 20-25C.

This is the definition that a number of manufacturers use, especially those who make radiators that claim to "handle" 919W of heat.