It is the flagship university of the University of Colorado system and was founded five months before Colorado was admitted to the union in 1876. According to The Public Ivies: America’s Flagship Public Universities (2001), it is considered one of the thirty “Public Ivy League” schools.
In 2010, the university consisted of nine colleges and schools and offered over 150 academic programs and enrolled 29,952 students. Eleven Nobel Laureates, nine MacArthur Fellows, and 18 astronauts have been affiliated with CU-Boulder as students, researchers, or faculty members in its history. The university received nearly US$454 million in sponsored research in 2010 to fund programs like the Laboratory for Atmospheric and Space Physics, and JILA.
University of Colorado at Boulder research articles from Innovation Toronto
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Low-cost coating would disrupt the building retrofit market and potentially save billions in electricity
It’s estimated that 10 percent of all the energy used in buildings in the U.S. can be attributed to window performance, costing building owners about $50 billion annually, yet the high cost of replacing windows or retrofitting them with an energy efficient coating is a major deterrent. U.S. Dept. of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) researchers are seeking to address this problem with creative chemistry—a polymer heat-reflective coating that can be painted on at one-tenth the cost.
“Instead of hiring expensive contractors, a homeowner could go to the local hardware store, buy the coating, and paint it on as a DIY retrofit—that’s the vision,” said Berkeley Lab scientist Raymond Weitekamp. “The coating will selectively reflect the infrared solar energy back to the sky while allowing visible light to pass through, which will drastically improve the energy efficiency of windows, particularly in warm climates and southern climates, where a significant fraction of energy usage goes to air conditioning.”
A team of Berkeley Lab scientists is receiving part of a $3.95 million award from the Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E) to develop this product. The multi-institutional team is led by researcher Garret Miyake at the University of Colorado Boulder, and also includes Caltech and Materia Inc.
There are retrofit window films on the market now that have spectral selectivity, but a professional contractor is needed to install them, a barrier for many building owners. A low-cost option could significantly expand adoption and result in potential annual energy savings of 35 billion kilowatt-hours, reducing carbon dioxide emissions by 24 billion kilograms per year, the equivalent of taking 5 million cars off the road.
The Berkeley Lab technology relies on a type of material called a bottlebrush polymer, which, as its name suggests, has one main rigid chain of molecules with bristles coming off the sides. This unusual molecular architecture lends it some unique properties, one being that it doesn’t entangle easily.
“Imagine spaghetti versus gummy worms,” Weitekamp explained. “Spaghetti can be tied up in knots. If you want to rearrange cooked spaghetti back to its uncooked alignment, you would have to put significant energy into unwinding it. But with gummy worms you can line them all up easily because they’re pretty rigid.”
As a graduate student at Caltech, Weitekamp worked on understanding and controlling how bottlebrush polymers self-assemble into nanostructures behaving as photonic crystals, which can selectively reflect light at different frequencies. Last year he came to Berkeley Lab as part of Cyclotron Road, a program for entrepreneurial researchers, to commercialize these coatings and other related polymer-based technologies. He has been working on the development of polymeric materials as a user at the Molecular Foundry, a DOE Office of Science User Facility at Berkeley Lab.
“We were very compelled by the potential impact of [Weitekamp’s] technology across a number of industries,” said Cyclotron Road director Ilan Gur. “His ideas aligned with the Foundry’s expertise in polymer chemistry and the window application fit squarely into Berkeley Lab’s existing strengths in buildings technology and energy analysis.”
For the ARPA-E award, Weitekamp is collaborating with Berkeley Lab’s Steve Selkowitz, a leading expert on building science and window technologies, and Arman Shehabi, an expert in analyzing energy use of buildings, to develop a cost-competitive and scalable product. Their target cost is $1.50 per square foot, one-tenth the current market cost for commercially installed energy efficient retrofit window coatings.
“ARPA-E invests in high-risk, high-reward projects,” Shehabi said. “The high reward in this project isn’t in the performance improvement. It’s transformative in how windows could be retrofitted—it’s something you can do yourself. The market need is very large, and there’s nothing low-cost out there that meets that need.”