Windy Dankoff KE5HV & Brian Green N6HWY
We are proposing a new schedule for hams: Regional Home Power Nets
7.230 MHz on Sundays at 1330 Pacific, Central, & Eastern time.
3.900 MHz on Wednesday at 2000 Pacific and Eastern time.
14.290 MHz Sunday at 1900 UTC.
7.110 MHz on Wednesday and Saturdays at 0500 UTC. Regional nets will keep the same times when we resume normal Standard time this fall.
f \ On The Horizon
Solar Energy Research Institute (SERI)
Another one of SERI's partnership efforts is paying off. The biggest news in solar cell research this year, according to Jack Stone, Director of Solar Electric Research at SERI, is ARCO Solar's new low-cost 1 square foot solar panel. Fabricated of copper-indium-diselenide (CIS), the new panel converts 11.1 percent of the sun's energy into electricity, a 30 percent increase in prior performance levels.
The achievement is a result of a three-year, cost-shared subcontract. ARCO is spending $4.8 million on the effort; SERI is contributing $4.2 million.
ARCO's breakthrough has the potential of bringing the cost for solar electricity down to 13 cents per kilowatt hour (compared to the 30-35 cents it costs today). Estimates are that CIS panels like these could be made at under $100 per square meter (about $9.50 per square foot) in large-scale production. In addition to its high efficiency and low cost, CIS has very stable properties, maintaining its power output after thousands of hours of testing.
Carlson Electronics Ad
Researchers at SERI have been granted a patent for a new tandem photovoltaic device that has promise of being both inexpensive and highly efficient. It uses gallium indium phosphide for the top cell and gallium arsenide for the bottom cell.
This tandem combination should theoretically lead to devices that are 34% efficient under one sun. Currently, devices are about 14%-15% efficient. Because the two materials possess crystal structures of the same size, the top cell can be grown on the bottom cell without creating the atomic structure defects that degrade the top cell's efficiency. The two materials are also current-matched so the device will not be diminished by one cell's providing less current than the other. The isolated top and bottom cells both exhibit excellent device characteristics with internal quantum efficiencies (the ratio of generated electrical current to incident light intensity) in the range of 80% to 90%. Adding to the attractiveness of this device is the commercial availablity of gallium arsenide and the discovery of several new and useful properties of gallium indium phosphide.
Reprinted from SERI Science & Technology In Review. Contact SERI at 1617 Cole Boulevard, Golden, CO 80401-3393.
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Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.