Category Archives: Energy

Wind Power Technology Breakthrough

China Makes Huge Breakthrough in Wind Power Technology by Zijun Li:

Chinese developers unveiled the world’s first full-permanent magnetic levitation (Maglev) wind power generator at the Wind Power Asia Exhibition 2006 held June 28 in Beijing, according to Xinhua News.
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The Maglev generator is expected to boost wind energy generating capacity by as much as 20 percent over traditional wind turbines. This would effectively cut the operational expenses of wind farms by up to half, keeping the overall cost of wind power under 0.4 yuan (5 cents US), according to Guokun Li, the chief scientific developer of the new technology. Further, the Maglev is able to utilize winds with starting speeds as low as 1.5 meters per second (m/s), and cut-in speeds of 3 m/s, the chief of Zhongke Energy was quoted as saying at the exhibition. When compared with the operational hours of existing wind turbines, the new technology will add an additional 1,000 hours of operation annually to wind power plants in areas with an average wind speed of 3 m/s.

Large-Scale, Cheap Solar Electricity

Photo of solar sheet manufacturing

Large-Scale, Cheap Solar Electricity by Kevin Bullis

This week, Nanosolar, a startup in Palo Alto, CA, announced plans to build a production facility with the capacity to make enough solar cells annually to generate 430 megawatts. This output would represent a substantial portion of the worldwide production of solar energy.

According to Nanosolar’s CEO Martin Roscheisen, the company will be able to produce solar cells much less expensively than is done with existing photovoltaics because its new method allows for the mass-production of the devices. In fact, maintains Roscheisen, the company’s technology will eventually make solar power cost-competitive with electricity on the power grid.

Nanosolar also announced this week more than $100 million in funding from various sources, including venture firms and government grants. The company was founded in 2001 and first received seed money in 2003 from Google’s founders Larry Page and Sergey Brin.

Information on the nanotechnology involved from the Nanosolar site.

Spray-On Solar-Power Cells

Spray-On Solar-Power Cells Are True Breakthrough by Stefan Lovgren for National Geographic News:

The plastic material uses nanotechnology and contains the first solar cells able to harness the sun’s invisible, infrared rays. The breakthrough has led theorists to predict that plastic solar cells could one day become five times more efficient than current solar cell technology.
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At a current cost of 25 to 50 cents per kilowatt-hour, solar power is significantly more expensive than conventional electrical power for residences. Average U.S. residential power prices are less than ten cents per kilowatt-hour, according to experts.

But that could change with the new material.

“Flexible, roller-processed solar cells have the potential to turn the sun’s power into a clean, green, convenient source of energy,” said John Wolfe, a nanotechnology venture capital investor at Lux Capital in New York City.

Converting Emissions to Biofuels

Converting emissions to biofuels at GreenFuel Technologies:

In the unit, non-toxic photosynthetic algae ‘eat’ the carbon dioxide and break the nitrogen-oxygen bonds. Scrubbed gas vents from the chimneys at the unit apex. Inline sensors monitor system performance and provide remote reporting, and a built-in automated harvesting system gathers algae ‘crops’ on a preprogrammed schedule, typically daily. The bioreactors are even self-cleaning.

The technology was tested at the MIT Cogeneration Plant (delivered 86% NOx reduction under all conditions, along with 50% CO2 reduction on rainy days, and 82% CO2 reduction on sunny day) and is now being tested at a commerical power plant.

Read news reports about the technology: Power Plants and How Algae Clean the Air

Read a more detailed report from the company: Air-Lift Bioreactors for Algal Growth on Flue Gas: Mathematical Modeling and Pilot-Plant Studies