Category: notebook components
By: Raghav Kapoor
Ionic Wind to cool down notebooks
It extracts 30% more heat and uses half the power of the traditional exhaust fan
Demonstration of cooling provided by Ionic wind
Recently, we saw a unique notebook cooling solution from Nexus Technology which was called the TDD-9000. It used a velvet cloth with a gel like heat absorbing substance to cool down the system. Now Tessera, the international chip-packaging company, is developing another unique cooling solution for the notebook, one that charges ions to move air particles away from the heat source. This would eliminate the need for a fan thus making the system noiseless.
It is said that the unique ionic wind can extract up to 30% more heat than the conventional exhaust fan and uses half the power. Here is how it works; a high intensity electric field ionizes air molecules surrounding the cooling system's electrode tip. When the ions travel from the emitter electrode to a collector electrode, they collide with neutral air particles, transferring charge and momentum, and increasing airflow. This ionic cooling system will be mounted next to a laptop vent and the heat pipes leading from the stressed CPU would carry the heat to a point between the ionic cooling system electrodes, from where the charged molecules, moving from emitter to collector, would carry the heat away from the heat pipe and out the vent.
In order to implement this system the research team still faces some challenges. First, since the laptops are built to function for at least 30,000 hours, care needs to be taken that the electrodes do not corrode prematurely. Second, since the voltage required to power the ionic converter is around 3,000 volts, the team needs to build a mechanism to convert the 12 volt DC battery supply into such a high voltage. This problem has been overcome, since the team has developed a solution which is only 3 centimeter square in size. Third, the company is trying to develop a way to reduce the amount of dust which gets into the system, for this a possible solution could be a pre-filter.
According to the company the cooling system is fully self-contained, featuring the ionic blower and power supply which can be built right into the fan cavity. The company plans to commercialize this system by next year.
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