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Hybrid solar lighting earns national technology transfer award
ORNL Engineer Dave Beshears displays the hybrid lighting system. (hi-res image)
The award was presented recently to representatives of the Department of Energy's Oak Ridge National Laboratory during the consortium's annual convention in Arlington, Texas.
The consortium is composed of more than 700 federal laboratories and facilities representing approximately 100,000 scientists and engineers. The awards recognize federal laboratory employees for outstanding work in the process of transferring a technology to the commercial marketplace.
The hybrid lighting technology uses a rooftop-mounted 48-inch diameter collector and secondary mirror that track the sun throughout the day. The collector system focuses the sunlight into 127 optical fibers connected to special light fixtures equipped with diffusion rods similar to fluorescent light bulbs. The rods spread light in all directions.
One collector currently powers eight to 10 hybrid light fixtures that can illuminate about 1,000 square feet of space. During times of little or no sunlight, a sensor controls the intensity of fluorescent lamps to maintain a constant level of illumination.
The technology reduces energy usage not only for lighting, but also for cooling due to the system's ability to block ultraviolet and infrared heat. The technology -- earning an R&D 100 Award and a Southeast Region Federal Laboratory Consortium Award during 2006 - could be particularly valuable in achieving improved energy efficiency in locations where there is an abundance of sunlight.
The system is estimated to save about 6,000 kilowatt hours per year in lighting and another 2,000 kilowatt hours in reduced cooling needs for a total savings of 8,000 kilowatt hours per year.
Hybrid lighting systems are being tested in various demonstration projects around the United States, including a Wal-Mart in McKinney, Texas, a Staples in Long Island, N.Y., a Braden's Furniture showroom in Knoxville, Tenn., The Naval Exchange in Hawaii, office space at San Diego State University, the Aveda corporate headquarters in Minneapolis and ORNL's Multi-Purpose Research Facility.
ORNL's hybrid lighting team is composed of David Beshears, Melissa Lapsa, Art Clemons, Dennis Earl, John Jordan, Randall Lind, Curt Maxey, Jeff Muhs, Christina Ward and Wes Wysor. The late Larry Dickens was ORNL's commercialization manager on the project.
The technology was developed through funding by DOE's Office of Energy Efficiency and Renewable Energy, Solar Technologies Program, along with a partnership of utility companies, state energy agencies, industry and universities.
ORNL is managed by UT-Battelle for the Department of Energy.