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."
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 |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 2 )
Related News Stories -
Self-Healing Material Pulls Carbon Out Of The Air
'... could seal the punctures.' - Raymond Z. Gallun, 1951.
Shapeshifting Materials Transform By Light
'Its lines wavered, flowed, and then painfully reformed.'- Philip K. Dick, 1957.
Superstrong Multilayer Metal-Graphene Composite Material
Negligible increase in weight increased material strength by hundreds of times.
Amphibio 3D Printed Gill Shirt
'... we can descend and live down there at one of those year-round aquatic resorts.' - Philip K. Dick, 1966.
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.
Wound Healing With Wearable Nanogenerators
'... forcing the energy transfer which allowed him to ... erase the other internal-external damage.'
Flying Dragon Robot Transforms In Mid-Air
Terrific prototype video.
Negative Matter Fluid Theorized In New Paper
'Of course, being negative matter, when you push it, it comes toward you..'
Grow Structures Upon Planetfall - Myco-Architecture
'They'll also start pulling in gases and liquids from the local atmosphere...'
MXene Hydrogel Skin For Robots Flexes And Senses
'The plastex swam and whirled like boiling toothpaste...'
EXPLORER, The First Total-Body Scanner
'The object is built up of an infinite series of plane layers, at the focus of the ray...'
UK Police AI To Stop Criminals Before They Strike
'... the computing mechanisms that studied and restructured the incoming material.'
Sonitus Audio Interface Positioned Beyond The Noise
'... an instrument having relatively small bit pieces adapted to be gripped between the teeth.'
Volvo's Self-Driving Mining Trucks
'A procession of automatic ore carts was racing over the bleak slag'
Audi Pop.Up Autonomous Electric Flying Car
'The cab was an egg-shaped bubble of light metals and plastics...'
Music Not Impossible (MNI) Vibrotactile Wearable Experience
Don't you want to experience the 'feely' effects?
Chinese Face Recognition Mistakes Bus Ad For Jaywalker
'... the imprint of her image on the telephoto cell.'
A Look Back At Apollo's Emergency Escape Vehicle
'A simple mechanism... it drove the iron ball through space like a ship.'
InMotion Glide 3 Electric Unicycle For The Last Mile
'...gyro-stabilized on a single wheel.'
China's Social Credit System - A Facebook-1984 Mashup
'Prestige, face, mana, repute, glory: the Sirenese word is strakh.'
Musk Declares Tesla Supercharger Capacity Will Double By Next Year
'Recharge the batteries... in almost every town and village...'
More SF in the News Stories
More Beyond Technovelgy science news stories