What is a Nanospreader™ ?
A patented copper encased two-phase vapor chamber into which pure water is vacuum sealed. The liquid is absorbed by a copper-mesh wick and passed as vapor through a micro-perforated copper sheet where it cools and returns as liquid to the wick.
In what situations do Nanospreaders™ work best?
As a size or performance enhancement to solutions requiring two or more round heat pipes.
In what volumes do Nanospreaders™ become cost competitive with traditional heat pipes?
Generally speaking, volumes in excess of 10k/year are needed to bring the cost in line with that of traditional heat pipes.
Is there a one-for-one substitution of Nanospreaders™ for heat pipes?
No, roughly speaking one Nanospreader™ can replace two or more heat pipes.
What reliability testing is done on Nanospreaders™ ?
Thermal Shock: 96 Cycles at - 35ºC to 110ºC
High Temp: 120ºC for 28 days
Low Temp: - 40ºC for 96 hrs
High Temp & High Humid: 65ºC at 85% humidity for 96 hrs
Operating Temperatures: 20ºC to 100ºC
Non-Operating Temperatures: - 40ºC to 100ºC
Can the working fluid freeze?
As this technology uses pure water as the working fluid, it can freeze. However, freezing is not an issue as no damage occurs to the cooling systems during freeze and thaw cycles.
How much power can it carry?
The power carrying capacity ranges from a few watts to hundreds of watts
What is the maximum power density that can be cooled down?
Our standard Nanospreaders™ are designed around densities of approximately 25w/cm2, while custom designs can handle 50w/cm2.
At what angle can Nanospreaders™ be bent?
The maximum bending angle is R~10 (inner circle base)
What is the thermal performance of the Nanospreader™ ?
As with all two phase heat transfer products the performance is different depending on heat load, heat source size, operating temperature and angle. The chart below shows typical performances of 200m long Nanospreaders™ .
Is the performance of the Nanospreader™ affected by orientation?
Generally these devices work equally well from orientations of +90 degrees to -5 or -10 degrees. At angles lower than -10 degrees where the heat source is higher than the heat sink then the device relies on the pumping capability of the wick. This chart shows the q-max vs angle. In this case at powers lower than 15 watts the unit is unaffected by gravity.
How can Nanospreaders™ outperform traditional round heat pipes if power density and thermal resistance metrics are roughly equal?
While more detailed information is available in the Nanospreaders™ Technology section, Nanospreader solutions perform better by minimizing interface resistance between the components.
