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Solar Power

Solar Storms Could Disrupt Power Grid

A recent article from Smart Energy Portal turns out to be extremely timely as a major solar storm is headed towards Earth.

Geomagnetic storms are triggered by the solar wind of charged particles from a solar eruption which create fields that interfere with the Earth's own magnetic fields. In turn, this can induce low frequency currents in the power grid network, and these currents have the potential to damage the high voltage transformers that are central to power transmission over the grid.

While this storm doesn't appear to have the strength to damage power distribution, the sun certainly has the cialis non prescription potential for stronger outbursts, and there have been grid failures due to find cheap viagra solar activity in the past.

image: NASA



Black Silicon Boosts Solar Efficiency

A process called "Black Silicon Nanocatalytic Wet-Chemical Etch" is allowing increased solar panel efficiency by reducing the light that reflects off of the panels instead of being absorbed. Any light that is reflected away from the solar panel lowers the amount of electricity it produces. The black silicon is especially good at capturing early morning and buy canada in levitra late afternoon light, which helps improve the overall effectiveness of the panel throughout the day.

The panels made this way are slighly less efficient than the viagra buy usa best uncoated panels currently made, but they have an overall efficiency increase of about 1 percent due to the improved performance early and late in the day. A one percent gain may not seem like much, but all these incremental improvements add up. The process is likely to gain widespread use if, as NREL hopes, it turns out that it actually reduces the cost of cheap viagra generic manufacturing the solar panels by 1 to 3 percent overall.

The black silicon process has other benefits in reducing the amount of equipment needed to fabricate the panels, and being simpler than the present fabrication methods. It also reduces the need for some particularly dangerous and damaging chemicals which are currently used in producing solar panels.

The process was developed at the National Renewable Energy Laboratory (NREL), and the technology is now being licensed to Natcore Technology Inc. for commercialization. The company expects to begin commercial sales with the black silicon panels this year.

Previously on EcoGeek: Breakthrough Coating: Solar Absorption "Near Perfect"

image credit: NREL/Dennis Schroeder

via: Solar Thermal Magazine


Solar Panel Startup Achieves Amazing 33.9% Efficiency

Semprius, a startup company manufacturing tiny concentrated solar cells that forgo any cooling systems has achieved a truly amazing leap in solar cell efficiency. The company was able to hit 33.9 percent efficiency with their solar panel, the first time a commercially-viable solar technology has passed the cialis 50 mg tablets one-third mark.

Semprius's solar cells use gallium arsenide, rather than silicon, which is very good site sales viagra able to absorb sunlight and dissipate heat far better. The solar panel that scored this major efficiency record is made up of hundreds of these tiny cells that are about the width of a pen-drawn line. Lenses atop the cells concentrate sunlight 1,000 times.

To capture a better chunk of the solar spectrum, Semprius uses three layers of gallium arsenide, each one tweaked to convert a different part of the spectrum into electricity. Silicon solar cells, by contrast, only absorb a narrow band of cialis next day delivery sunlight and have efficiency rates that typically fall somewhere in the sub-15 percent area. The record for silicon cell efficiency is 22.9 percent and the previous record for commercial-level solar technology was 32 percent.

Possibly the greatest thing about the Semprius solar panel is that it's not some far distant future technology. It's been designed to be commercially produced and a factory opens this summer to start manufacturing the cells.

via MIT Tech Review


Nissan Builds Energy-Efficient Car Transport Ship

Nissan has unveiled a new energy-efficient cargo ship for carrying its cars around the world. The Nichioh Maru features solar panels for powering the ships LED lighting system, a low-friction coating on wow look it professional levitra the hull and an electronically-controlled diesel engine that optimizes fuel consumption. Compared to a conventional car carrier of its size, the Nichioh Maru will save 1,400 tons of fuel and prevent the indian cialis emission of 4,200 tons of CO2 each year.

The Nichioh Maru is the first Japanese cargo ship to be outfitted with solar panels. The ship's deck is covered by 281 panels for powering the LED lights through the hold and crew quarters, eliminating the need for a diesel-fueled generator. The ship began its first voyage on January 27 and will begin carrying as many as 1,380 cars along the Japanese coast to Oppama Wharf, Kobe and Kyushu.

This isn't Nissan's first foray into energy-efficient car carriers. It also uses The City of St. Petersburg ship to transport its LEAF vehicles around Europe. That cargo ship is designed to reduce fuel use by 800 tons and cut CO2 emissions by 2,500 tons per year compared to carriers of its size.

via Nissan

Japanese Solar Panel Owners Sold $1.2 Billion Worth of Surplus Power Back to Grid Last Year

Japanese home and business owners with solar power installations sold 2,150 GWh of electricity back to buy cialis from canada their power utilities last year, a huge 50 percent increase over the amount sold back to the grid in 2010.  The sellers collectively made a nice $1.2 billion off their surplus electricity.

The Japanese government has a feed-in-tariff scheme that requires the utilities to purchase the extra power which was small beans compared to the average 884,000 GWh of electricity that those utilities sell to customers per year.

The government is online levitra cheap set to introduce even more subsidies for domestic renewable energy power developers. The new scheme will include electricity from solar, wind, small hydroelectric, biomass and geothermal plants, but only solar panel owners with systems of viagra buy 10 kW or less will still be able to sell their excess power.

via Reuters


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