Researchers in the ラーメンベット 禁止ゲーム of Engineering at The University of Texas at Austin are one step closer to delivering smart windows with a new level of energy efficiency, engineering materials that allow windows to reveal light without transferring heat and, conversely, to block light while allowing heat transmission, as described in two new ラーメンベット 口コミ papers.
By allowing indoor occupants to more precisely control the energy and sunlight passing through a window, the ラーメンベット 口コミ materials could significantly reduce costs for heating and cooling buildings.
In 2013, chemical engineering professor Delia Milliron and her team became the first to develop dual-band electrochromic materials that blend two materials with distinct optical properties for selective control of visible and heat-producing near-infrared light (NIR). In a 2013 issue of Nature, Milliron’s ラーメンベット 口コミ group demonstrated how, using a small jolt of electricity, a nanocrystal material could be switched back and forth, enabling independent control of light and energy.
The team now has engineered two ラーメンベット 口コミ advancements in electrochromic materials —
a highly selective cool mode and a warm mode — not thought possible several years ago.
”The cool ラーメンベット 口コミ a major step toward a commercialized product because it enables control of 90 percent of NIR and 80 percent of the visible light from the sun and takes only minutes to switch between modes. The previously reported material could require hours."
To achieve this high performance, Milliron and a team, including ラーメンベット 禁止ゲーム postdoctoral researcher Jongwook Kim and collaborator Brett Helms of the Lawrence Berkeley National Lab, developed a ラーメンベット 口コミ nanostructured architecture for electrochromic materials that allows for a cool mode to block near-infrared light while allowing the visible light to shine through. This could help reduce energy costs for cooling buildings and homes during the summer. The researchers reported the ラーメンベット 口コミ architecture in Nano Letters on July 20.
“We believe our ラーメンベット 口コミ architected nanocomposite could be seen as a model material, establishing the ideal design for a dual-band electrochromic material,” Milliron said. “This material could be ideal for application as a smart electrochromic window for buildings.”
In the paper, the team demonstrates how the ラーメンベット 口コミ material can strongly and selectively modulate visible light and NIR by applying a small voltage.
To optimize the performance of electrochromics for practical use, the team organized the two components of the composite ラーメンベット 口コミ to create a porous interpenetrating network. The framework architecture provides channels for transport of electronic and ionic change. This organization enables substantially faster switching between modes.
The researchers are now working to produce a similarly structured nanocomposite ラーメンベット 口コミ by simple methods, suitable for low-cost manufacturing.
In a second ラーメンベット 口コミ paper, Milliron and her team, including ラーメンベット 禁止ゲーム graduate student Clayton Dahlman, have reported a proof-of-concept demonstrating how they can achieve optical control properties in windows from a well-crafted, single-component film. The concept includes a simple coating that creates a new warm mode, in which visible light can be blocked, while near-infrared light can enter. This new setting could be most useful on a sunny winter day, when an occupant would want infrared radiation to pass into a building for warmth, but the glare from sunlight to be reduced.
In this paper, published in the Journal of the American Chemical Society, Milliron proved that a coating containing a single component — doped titania nanocrystals — could demonstrate dynamic control over the transmittance of solar radiation. Because of two distinct charging mechanisms found at different applied voltages, this ラーメンベット 口コミ can selectively block visible or infrared radiation.
” The cool ラーメンベット 口コミ a major step toward a commercialized product because it enables control of 90 percent of NIR and 80 percent of the visible light from the sun and takes only minutes to switch between modes. The previously reported material could require hours."
“These two advancements show that sophisticated dynamic control of sunlight is possible,” Milliron said. “We believe our deliberately crafted nanocrystal-based materials could meet the performance and cost targets needed to progress toward commercialization of smart windows.”
Both studies received funding from the U.S. Department of ラーメンベット 口コミ and the Welch Foundation, as well as the NSF Graduate Fellowship Program.
