| Future of Solar Living - Science Insider
Reported January 2010
ABOUT SOLAR CELLS: In the future, more homes will most likely incorporate solar cells, also known as photovoltaics. Solar cells are made of semiconductor materials (usually silicon), which absorb sunlight's energy and stores it until it is needed to power something. Unfortunately, current solar cells can only absorb between 15 to 25 percent of sunlight's energy. This is because it only absorbs visible light; other kinds of light pass right through the cell as if it were transparent.
HOW CAN HOMES CONSERVE ENERGY? There are many ways in which houses can conserve energy. Improvements in energy-efficient lighting can reduce power usage by as much as 65 percent. In fact, if every American household changed just five of the most-used lighting fixtures to energy-efficient technology, they would save a total of $6 billion and reduce power usage by the equivalent of the annual output of more than 21 power plants. Many homes have high-performance, energy-efficient windows -- featuring double-glazing or special coatings -- to reduce heat loss in cooler climates and heat gain in warmer climates. These two factors account for 50 percent of a home's heating and cooling needs. Replacing window frames with low-conductance materials like wood, vinyl and fiberglass can also improve a home's insulating capability.
The Optical Society of America, The Materials Research Society, and The Institute of Electrical and Electronics Engineers, Inc.-USA, contributed to the information contained in the TV portion of this report.
If you would like more information, please contact:
Tom Welch
U.S. Department of Energy
Washington, DC 20585
(202) 586-4316
thomas.welch@hq.doe.gov
Institute of Electrical and Electronics Engineers, Inc.
IEEE
Pender McCarter
IEEE http://www.ieee.org
IEEE-USA http://www.ieeeusa.org
p.mccarter@ieee.org
Optical Society of America
Washington, DC 20036-1023
(202) 223-8130
http://www.osa.org
Materials Research Society
Warrendale, PA 15086-7573
(724) 779-3003
http://www.mrs.org
webmaster@mrs.org
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