Press Esc to close
Saturday 24 June 2017
News updated at 2:05 AM IST

Jumping droplets key to energy efficient products

Washington, Jan 2,PTI: 20:27 IST
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
NDA's presidential nominee Ram Nath Kovind flanked by Prime Minister Narendra Modi, BJP chief...

NDA's presidential nominee Ram Nath Kovind flanked by Prime Minister Narendra Modi, BJP chief...

A police officer offers supports to the son of slain DSP Mohammed Ayub Pandit to pay respects to...

A police officer offers supports to the son of slain DSP Mohammed Ayub Pandit to pay respects to...

Members of Majlis-e-Ulama-e-Hind (Delhi state) burn an effigy during a protest against Israel at...

Members of Majlis-e-Ulama-e-Hind (Delhi state) burn an effigy during a protest against Israel at...

Indian Space Research Organisation (ISRO)'s PSLV C38, carrying earth observation satellite...

Indian Space Research Organisation (ISRO)'s PSLV C38, carrying earth observation satellite...

Muslims take cover with a cloth to protect themselves from scorching heat as they offer last...

Muslims take cover with a cloth to protect themselves from scorching heat as they offer last...

BSF personnel take part in a cycle rally at India Gate to aware people against drugs in New Dehi...

BSF personnel take part in a cycle rally at India Gate to aware people against drugs in New Dehi...

Angry students burn railway properties during a violent protest against Central government over...

Angry students burn railway properties during a violent protest against Central government over...

Former Union minister Nagmani showing a bullet which was fired from an unidentified assailant...

Former Union minister Nagmani showing a bullet which was fired from an unidentified assailant...

Children are seen near the entrance gate of Maroda Village which was renamed as 'Trump Village'...

Children are seen near the entrance gate of Maroda Village which was renamed as 'Trump Village'...

Children play football in mud after rainfall in Kolkata on Friday. PTI

Children play football in mud after rainfall in Kolkata on Friday. PTI

Like us on Facebook

Copyright 2017, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523
Powered by Yodasoft Technologies Pvt. Ltd.