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Alternative Energy

— Environment

Making the most of low-grade silicon for cheaper, more efficient solar panels

By - May 7, 2013 1 Picture
While we wait for affordable multi-junction solar cells that are pushing past the 40 percent conversion efficiency mark to make it out of the lab and onto our roofs, we have to make do with standard commercial silicon cells that currently max out at around 19 percent. A team from the University of New South Wales in Australia has found a way to improve the quality of low-grade silicon, enabling higher efficiency solar cells to be produced from cheaper, low-grade silicon. Read More
— Environment

World’s largest OTEC power plant planned for China

By - April 18, 2013 4 Pictures
Lockheed Martin has been getting its feet wet in the renewable energy game for some time. In the 1970s it helped build the world’s first successful floating Ocean Thermal Energy Conversion (OTEC) system that generated net power, and in 2009 it was awarded a contract to develop an OTEC pilot plant in Hawaii. That project has apparently been canceled but the company has now shifted its OTEC sights westward by teaming up with Hong Kong-based Reignwood Group to co-develop a pilot plant that will be built off the coast of southern China. Read More
— Science

Hybrid solar system boosts natural gas powerplant efficiency by 20 percent

By - April 17, 2013 3 Pictures
Solar power holds the promise of clean, limitless energy, but it currently suffers from high costs and an inherent disadvantage of not working when the sun isn't shining. The Department of Energy's Pacific Northwest National Laboratory is taking a best-of-both-worlds approach by developing a hybrid solar/gas system that increases the efficiency and reduces the carbon footprint of natural gas power plants. Read More
— Environment

Spectrolab claims record efficiency for new solar cell

By - April 9, 2013 1 Picture
Spectrolab, a Boeing subsidiary known for the manufacture of solar cells for satellites and spacecraft, has in recent years turned its attention to terrestrial solar cells to tap into the expanding alternative energy market. Now the California-based company has claimed a new solar cell efficiency record of 37.8 percent for a ground-based multi-junction cell without solar concentration. Read More
— Science

Silicon nanoparticles could lead to on-demand hydrogen generation

By - January 23, 2013 4 Pictures
Researchers at the University of Buffalo have created spherical silicon nanoparticles they claim could lead to hydrogen generation on demand becoming a “just add water” affair. When the particles are combined with water, they rapidly form hydrogen and silicic acid, a nontoxic byproduct, in a reaction that requires no light, heat or electricity. In experiments, the hydrogen produced was shown to be relatively pure by successfully being used to power a small fan via a small fuel cell. Read More
— Science

Inexpensive catalyst for producing hydrogen under real-world conditions found

By - January 11, 2013 1 Picture
Hydrogen has been hailed as the fuel of the future, but producing it cleanly using platinum as a catalyst is simply too costly to service the world's energy needs. On the flipside, producing hydrogen with fossil fuels not only releases CO2 as a byproduct, but is unsustainable, negating hydrogen's green potential. However, hydrogen may yet make good on its promise thanks to a group of scientists at the University of Cambridge. Read More
— Environment

Pavegen kinetic energy tiles seek crowd-funding for school installations

By - January 6, 2013 7 Pictures
"Create electricity, just by walking" is an evocative statement, and one which surely warrants some attention in these eco-efficient times when the need to seek alternative energy sources is well understood. Pavegen – a system for harvesting kinetic energy from foot traffic, and which the catchy soundbite belongs to – is now being put forward for crowd-funding through Kickstarter with the aim of raising enough money to fund two school projects, one in the U.S. and one in the U.K. Read More
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