Nanotubes boost potential of salinity power as a renewable energy source In November 2009, Norwegian state owned electricity company Statkraft opened the world’s first osmotic power plant prototype, which generates electricity from the difference in the salt concentration between river water and sea water. While osmotic power is a clean, renewable energy source, its commercial use has been limited due to the low generating capacities offered by current technology – the Statkraft plant, for example, has a capacity of about 4 kW. Now researchers have discovered a new way to harness osmotic power that they claim would enable a 1 m2 (10.7 sq. ft.) membrane to have the same 4 kW capacity as the entire Statkraft plant. The global osmotic, or salinity gradient, power capacity, which is concentrated at the mouths of rivers, is estimated by Statkraft to be in the region of 1,600 to 1,700 TWh annually. The Statkraft prototype plant (and a planned 2 MW pilot facility) relies on the first method, using a polymide membrane that is able to produce 1 W/m2 of membrane.
Princeton’s nanomesh nearly triples solar cell efficiency There is huge potential in solar power. The sun is a giant ball of burning hydrogen in the sky, and it’s going to be sticking around for at least a few more billion years. For all intents and purposes, it’s a free source of energy. Sadly, humanity hasn’t been very good at harnessing its power directly. Led by Stephen Chou, the team has made two dramatic improvements: reducing reflectivity, and more effectively capturing the light that isn’t reflected. PlaCSH is also capable of capturing a large amount of sunlight even when the sunlight is dispersed on cloudy days, which results in an amazing 81% increase in efficiency under indirect lighting conditions when compared to conventional organic solar cell technology. The gold mesh that sits on top is incredibly small. The research team believes that the cells can be made cost effectively using a nanofabrication method that Chou himself invented over a decade ago. Now read: Is the slumping solar market temporary or a long-term trend?
Solar Energy: Stanford scientists build the first all-carbon solar cell The Bao group's all-carbon solar cell consists of a photoactive layer, which absorbs sunlight, sandwiched between two electrodes. (Photo: Mark Shwartz / Stanford University) inShare6 October 31, 2012 By Mark Shwartz Stanford University scientists have built the first solar cell made entirely of carbon, a promising alternative to the expensive materials used in photovoltaic devices today. "Carbon has the potential to deliver high performance at a low cost," said study senior author Zhenan Bao, a professor of chemical engineering at Stanford. Unlike rigid silicon solar panels that adorn many rooftops, Stanford's thin film prototype is made of carbon materials that can be coated from solution. The coating technique also has the potential to reduce manufacturing costs, said Stanford graduate student Michael Vosgueritchian, co-lead author of the study with postdoctoral researcher Marc Ramuz. "Processing silicon-based solar cells requires a lot of steps," Vosgueritchian explained.
Free Energy and Free Thinking Perendev is Tooling Up for Magnetic Motor Mass Production in Europe All-magnet motor poised to be first to reach market. German manufacturer licensed to manufacture 20 kw unit for Europe and Russia. Estimated cost for first units: $8500 Euros. by Sterling D. Allan Copyright © 2004, all rights reserved Pure Energy Systems News (See Follow-up Stories below) JOHANNESBURG, SOUTH AFRICA -- For centuries, inventors have been claiming to come up with magnetic motor designs that use nothing more than the power of permanent magnets for the motive force; and for the same amount of time, mainstream science has responded that this is impossible. History tells us that what has been proven in many people's back yards and garages does not always coincide with mathematics of the day. Refusing to be daunted by what he considers to be petty dogmas of academic science, inventor Michael J. Perendev's new website was published recently at Perendev-Power.com with the assertion that they have achieved the milestone of producing "the world's first fuelless magnetic engine." Q.
Top 10 Solar-Powered Gadgets for Green Tech Lovers Here are 10 of the coolest, weirdest, and most practical eco-friendly solar powered gizmos. “Every Day Is Earth Day” So we don’t need any special reason to use these gadgets. 1. Logitech Solar Keyboard A solar-powered keyboard might sound counterintuitive, since you’re most likely to use it indoors, but this peripheral is sensitive enough to pick up charge from a lamp. 2. If you’re riding around outdoors anyway, why not charge your bike light from the sun and forget the disposable batteries? 3. The $250 Voltaic solar backpack includes a pair of 2-watt, detachable solar panels that can output up to 12 volts. 4. Brunton makes rugged solar chargers for smartphones, digital cameras, and other handheld devices. 5. Packing up to 15 watts in its included battery pack, the $499 Voltaic Generator can juice a laptop for roughly 5 hours. 6. A search for green tech on Amazon turned up this 720p, 10X-optical-zoom camcorder fitted with two solar panels. 8. 9. 10.
Renewable Energy Sources (4) Wave energy « dnahtigal What is wave energy? Waves are caused by the action of winds on the sea. Waves can be many metres in height and contain a great deal of energy. This energy can be harnessed to drive turbines that generate electricity. How is wave energy collected? Wave energy collectors are of two main types. Where is wave energy collected? Wave energy can be harnessed in coastal areas, close to the shore. Advantages This is a non-polluting source of energy. Disadvantages The turbines can be unsightly. Like this: Like Loading... wave-energy Wastewater Treatment Plant to Produce Electricity From Fuel Cells Just yesterday, I posted an overview of various waste-to-energy initiatives as part of our series on biofuels. Today, I am here to tell you about a new development that extends this concept into new territory—the use of biomass to generate even cleaner electricity, directly through the use of a fuel cell. The idea of capturing biogas at wastewater facilities and using it to provide power is not new. For many years, plants have been using anaerobic digestion technology to produce biogas which was then burned to produce power in conventional gas turbines, while reducing the quantity of residual waste at the same time. In California, the Inland Empire Utilities Agency (IEUA) has been using digester gas to provide power to their plant for some time. However in the face of increasingly stringent air quality regulations for power generation, they decided to move up to a cleaner solution. The enclosed video from Anaergia is a computer simulation that describes their process.
3D solar panels can produce 20 times more energy than flat panels We see the trend in 3D technology everywhere: Movie theaters, home theaters, game consoles, 3D printers. But researchers at Massachusetts Institute of Technology recently discovered that creating a 3D-inspired solar panel not only help to keep up with the trends, it could draw in 20 times more energy than flat panel designs. Traditional solar panels lay flat on a surface or rooftop, facing the sun to collect energy. MIT researchers decided to change the shape of solar panels, conducting experiments with a cube, tall cube, and tower-shaped panels to see which design brought in more energy. Compared to flat panels, all three 3D panels created impressive results and outproduced traditional panels, with the accordion-style tower drawing in 20 times more power per square foot. The accordion-style arrays also work better because they receive solar energy from all angles rather than in just one direction.