globalbriefs


News and resources to inspire concerned citizens to work together in building a healthier, stronger society that benefits all.


Hot Stuff New Technology Increases


Solar Efficiency


There is huge potential in solar power, but our current methods of capturing the sun’s energy are limited as widely used silicon solar cells approach their theoret- ical limit of 33.7 percent efficiency. Now a Princeton Univer- sity research team has applied nanotechnology principles to incorporate a design that significantly increases their efficacy. Led by Stephen Chou, the team has made two dramatic


improvements: reducing reflectivity and more effectively cap- turing the light that isn’t reflected. The new solar cell is much thinner and less reflective, capturing many more light waves via a minute mesh and bouncing off only about 4 percent of direct sunlight. The new design is capable of capturing a large amount of sunlight even when it’s cloudy, producing an 81 percent increase in efficiency even under indirect lighting conditions.


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Eco-House Green Homes Can be a Bargain


DIGITAL INFRARED


THERMAL IMAGING DITI can assess pain & pathology anywhere in the body


Consider including thermography for your


breast screening


One of the most innovative, energy-efficient houses in the United States has been built in the District of Columbia’s working-class Dean- wood neighborhood, which has struggled with foreclosures. The Empowerhouse, a residence that produces all of its own energy, consumes 90 percent less energy for heating and cooling than a conventional dwelling. Empowerhouse was designed using


“passive house” technologies as part of the Solar Decathlon design competition, held on the National Mall in 2011. It’s the work of students at The New School, in New York City, and Stevens Institute of Tech- nology, in Hoboken, New Jersey, in partnership with Habitat for Humanity and the D.C. Department of Housing and Com- munity Development. Each duplicable unit costs a locally affordable $250,000.


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Bringing the community into the design process for both the house and landscape is the basis for collaboration on ad- ditional projects in the neighborhood, including a new com- munity learning garden. The designers remark that it all plays a part in creating social sustainability, an aspect often left out of development programs.


Source: Parsit.Parsons.edu


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