Press Esc to close
Thursday 05 May 2016
News updated at 3:20 AM IST
Weather
Max: 36.2°C
Min : 24.5°C
In Bengaluru
Sunny day

Jumping droplets key to energy efficient products

Washington, Jan 2,PTI:

Microscopic water droplets jumping from one surface to another could hold the key to a wide array of more energy efficient products — from large solar panels to compact laptop computers, say scientists.

A team at Duke University has, in fact, developed a new way of producing thermal diodes, devices which regulate heat to preferentially flow in a certain direction, effectively creating a thermal conductor in the forward direction and an insulator in the reverse direction.

While thermal diodes can be made from solid materials, these solid-state diodes are not nearly as effective as “phase-change” thermal diodes that rely on vaporisation and condensation to transport heat, say the scientists.

These phase-change diodes can transfer over a hundred times more heat in the forward direction compared to the reverse, but with major limitations — they are dependent on gravity or restricted by a tubular configuration.

These limitations severely constrain the application of phase-change thermal diodes, for example, in mobile electronics which require orientation independence or solar panels which require a large surface area.

The Duke engineers believe they have figured out a way  to solve these limitations to existing thermal diodes by exploiting self-propelled water droplets, which can jump from a superhydrophobic (highly water-repellent) surface to a superhydrophilic (highly absorbent) surface, but not the other way around.


Go to Top

Photo Gallery
Anganwadi workers shouting slogans during a protest rally by members of Nikhila Odisha Anganwadi...

Anganwadi workers shouting slogans during a protest rally by members of Nikhila Odisha Anganwadi...

Laborers pack newborn chicks into crates in Jammu...

Laborers pack newborn chicks into crates in Jammu...

A Kingfisher holds a prey (fish) in its beak on the banks of Dal Lake in Srinagar...

A Kingfisher holds a prey (fish) in its beak on the banks of Dal Lake in Srinagar...

Tourists ride Shikaras as they enjoy the cool weather at Dal Lake in Srinagar...

Tourists ride Shikaras as they enjoy the cool weather at Dal Lake in Srinagar...

Painted Storks catching fish in a pond at their enclosure in Kolkata Zoo...

Painted Storks catching fish in a pond at their enclosure in Kolkata Zoo...

Indian Air Force contingent of Ex Red Flag 16-1 at Eielson Air Force Base Alaska, USA...

Indian Air Force contingent of Ex Red Flag 16-1 at Eielson Air Force Base Alaska, USA...

A Royal Bengal Tiger at its enclosure in Kolkata Zoo on Wednesday...

A Royal Bengal Tiger at its enclosure in Kolkata Zoo on Wednesday...

Plantain Crop damaged at hunsur due to haevy rain...

Plantain Crop damaged at hunsur due to haevy rain...

Sapthagiri college of Engineering  students are using  Pulsar 220 DTSl Engine designed a 12 Feet...

Sapthagiri college of Engineering students are using Pulsar 220 DTSl Engine designed a 12 Feet...

A security person walks as clouds hover over the Parliament house during the Parliament session...

A security person walks as clouds hover over the Parliament house during the Parliament session...