Thermeleon Roof Tiles Change Color To Save Energy

Prototype roof tiles developed by MIT graduates change color based on temperature. This simple idea could save a substantial amount on building heating costs. The team calls itself "thermeleon", a combination of "thermal" and "chameleon".


(Roofing tiles change color to save energy)

The team's lab measurements show that in their white state, the tiles reflect about 80 percent of the sunlight falling on them, while when black they reflect only about 30 percent. That means in their white state, they could save as much as 20 percent of present cooling costs, according to recent studies. Savings from the black state in winter have yet to be quantified...

they use a common commercial polymer (in one version, one that is commonly used in hair gels) in a water solution. That solution is encapsulated — between layers of glass and plastic in their original prototype, and between flexible plastic layers in their latest version — with a dark layer at the back.

When the temperature is below a certain level (which they can choose by varying the exact formulation), the polymer stays dissolved, and the black backing shows through, absorbing the sun's heat. But when the temperature climbs, the polymer condenses to form tiny droplets, whose small sizes scatter light and thus produce a white surface, reflecting the sun's heat.

The team is still working on their product; their current research focuses on the idea that the polymer solution would be micro-encapsulated and the tiny capsules carried in a clear paint material that could be brushed or sprayed onto any existing surface.

The team won first place in the Making and Designing Materials Engineering Contest (MADMEC); the competition is intended to encourage the development of innovative materials that improve energy efficiency.

Frank Herbert had a very similar idea for his epic novel Dune. In the story, chromoplastic "tiles" are used to encourage evaporation for the purposes of plant irrigation.

"Each bush, each weed you see out there in the erg," she said, "how do you suppose it lives when we leave it? Each is planted most tenderly in its own little pit. The pits are filled with smooth ovals of chromoplastic. Light turns them white. You can see them glistening in the dawn if you look down from a high place. White reflects. But when Old Father Sun departs, the chromoplastic reverts to transparency in the dark. It cools with extreme rapidity. The surface condenses moisture out of the air. That moisture trickles down to keep our plants alive."

From Physorg.

Scroll down for more stories in the same category. (Story submitted 10/9/2009)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 2 )

Related News Stories - (" Material ")

Dune Fans! Metal-Organic Frameworks Make Science Fiction Real
'Dew collectors,' he muttered, enchanted by the simple beauty of such a scheme. - Frank Herbert, 1965.

Fungi-Infused Concrete Repairs Itself
'I noticed that curious mottled knots were forming, indicating where the room had been strained and healed faultily.'- J.G. Ballard, 1962.

3D Printed Graphene Aerogel - So Light!
'... light as cork and stronger than steel...' - Edgar Rice Burroughs, 1929.

Vantablack Now IMMEASURABLY Black
'a black coating now that’s ninety-nine percent absorptive...' - Doc Smith, 1934.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

IBM's Grain Of Sand Computer
'Our ancestors... thought to make the very sand beneath their feet intelligent...'

Liquid Metal Shape-Changing 'Soft Robotics'
'A mimetic poly-alloy... 'What the hell does that mean?''

The Hammock Caravan And Italo Calvino's Octavia
'Now I will tell you how Octavia, the spider-web city, is made.'

Super-Resolution Microscopy Provides '4D' Views
View the magnified interior of living cells.

Have I Seen The Tesla Roadster Story Before?
'Only it wasn't a vessel. It was an automobile...'

Watch 'Do You Trust This Computer' For Free Today
Thanks for making this available, Elon.

Self-Driving Car Ticketed
This just missed making my day.

Elon Musk Tweets Versions Of Clarke's Operation Cleanup
'Fortunately, the old orbital forts were superbly equipped for this task.'

Burner Generates Temporary Phone Numbers
'Interesting phone system he's got, by the way...'

Walmart’s Autonomous Robot Bees
Everyone loves bees.

EA Created AI That Taught Itself To Play Battlefield
Harmless fun for computer scientists.

Is Teleportation A Death Sentence?
'A long trail of dead, he thought, left across the stars...'

New Brain Scanner Lets You Move Around
'In Bob Arctor's living room his thousand dollar custom-quality cephscope crafted by Altec...'

Can An Entire Brain Be Simulated In A Computer?
'The miles of relays and photocells had given way to the spongy globe of platinum iridium about the size of the human brain.'

Physicists Try To Turn Light Into Matter
If E=mc squared, then... m=E/c squared!

Save Your Brain's Connectome, Upload Yourself Elsewhere
'You've got remote storage. How regular is the update?'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.