Scientists at the University of California Santa Barbara published a paper that proposes adaptive roof tile technology that can adjust to ambient temperatures.
Using a wax motor, tiles could switch from a heating or cooling state enabling savings on heating and cooling costs. The motor switches between cooling and heating states within 3 degrees Celsius of the switch temperature.
The concept could reduce cooling and heating needs by more than 2.5 times, the paper says. The volume of wax changes as the ambient temperature changes, creating pressure that moves mechanical parts. The motor could push or retract pistons that close or open louvers on the tile’s surface.
When there are cooler temperatures, the wax is solid and louvers are closed and lay flat, exposing a surface that absorbs sunlight and minimizes heat dissipation. As temperatures reach about 64.5 degrees Fahrenheit, the wax begins to melt and expand. This action pushes open louvers and exposes a surface that reflects sunlight and emits trapped heat.
Related Stories
| Nov 9, 2010
U.S. Army steps up requirements for greening building
Cool roofs, solar water heating, and advanced metering are among energy-efficiency elements that will have to be used in new permanent Army buildings in the U.S. and abroad starting in FY 2013. Designs for new construction and major renovations will incorporate sustainable design and development principles contained in ASHRAE 189.1.
| Nov 3, 2010
Sailing center sets course for energy efficiency, sustainability
The Milwaukee (Wis.) Community Sailing Center’s new facility on Lake Michigan counts a geothermal heating and cooling system among its sustainable features. The facility was designed for the nonprofit instructional sailing organization with energy efficiency and low operating costs in mind.
| Nov 2, 2010
A Look Back at the Navy’s First LEED Gold
Building Design+Construction takes a retrospective tour of a pace-setting LEED project.
| Nov 2, 2010
Wind Power, Windy City-style
Building-integrated wind turbines lend a futuristic look to a parking structure in Chicago’s trendy River North neighborhood. Only time will tell how much power the wind devices will generate.
| Oct 13, 2010
Biloxi’s convention center bigger, better after Katrina
The Mississippi Coast Coliseum and Convention Center in Biloxi is once again open for business following a renovation and expansion necessitated by Hurricane Katrina.
| Oct 13, 2010
Residences bring students, faculty together in the Middle East
A new residence complex is in design for United Arab Emirates University in Al Ain, UAE, near Abu Dhabi. Plans for the 120-acre mixed-use development include 710 clustered townhomes and apartments for students and faculty and common areas for community activities.
| Oct 12, 2010
Cuyahoga County Soldiers’ and Sailors’ Monument, Cleveland, Ohio
27th Annual Reconstruction Awards—Gold Award. The Cuyahoga County Soldiers’ and Sailors’ Monument was dedicated on the Fourth of July, 1894, to honor the memory of the more than 9,000 Cuyahoga County veterans of the Civil War.
| Oct 12, 2010
Building 13 Naval Station, Great Lakes, Ill.
27th Annual Reconstruction Awards—Gold Award. Designed by Chicago architect Jarvis Hunt and constructed in 1903, Building 13 is one of 39 structures within the Great Lakes Historic District at Naval Station Great Lakes, Ill.
| Sep 13, 2010
World's busiest land port also to be its greenest
A larger, more efficient, and supergreen border crossing facility is planned for the San Ysidro (Calif.) Port of Entry to better handle the more than 100,000 people who cross the U.S.-Mexico border there each day.