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MIT Researchers are Printing Solar Cells on Sheets of Paper 

MIT Researchers are Printing Solar Cells on Sheets of Paper 
Published on August 20, 2011 by admin · No Comments Solar power is a great alternative energy source, but it’s unfortunately a rather expensive one. However, researchers at MIT are working on a new and less-expensive way to make solar cells which involves printing them directly on to fabric or paper. We’re not talking about any fancy paper or fabrics. It’s a much easier method than the current one, which needs super high-temperature liquids at several hundred degrees Celsius to create the cells. The substrate of the current method is usually glass and requires a number of other components that are expensive and result in a heavy, rigid object – and that’s not even taking into account the installation costs. Read Entire Article HERE Related:  Environment

Flexible Solar Cells Mounted On Everyday 8.5 x 11 Paper By: David Russell Schilling | June 18th, 2013 Miles Barr, an MIT student studying chemical engineering, was awarded the 2012 $30,000 Lemelson-MIT student prize for his innovative “Printed Paper Photovoltaics” or “3PV” design. The design competition was funded by Italian oil company Eni which invested $5 million in the Emi-MIT Solar Frontiers Research Center at MIT. The center also received $2 million from the National Science Foundation (NSF). Barr’s paper detailing the process was published in the Journal of Advanced Materials. Reducing the Cost of “Inactive” Solar Cell Components Barr uses a low temperature printing process allowing the mounting of solar cells on a wide variety of materials. Imagine people carrying around paper in their pockets and unfolding it to generate electricity in real time. Integration of Solar Cells Into Common Everyday Items Barr sees a world where solar cells can be mounted on just about anything from window shades to wallpaper, roof tiles and even clothing.

Solar Power To Be Sold For Less Than Coal Clean Power Published on February 3rd, 2013 | by Nicholas Brown Update: Some sentences and links have been added to this post to provide better context and comparison. Update #2: I’ve published two articles on energy subsidies in response to comments on this post regarding that matter. They are: “Energy Subsidies — Clean Energy Subsidies vs Fossil Subsidies” and “Oil Subsidies & Natural Gas Subsidies — Subsidies For The Big Boys.” According to a Power Purchase Agreement (PPA) between El Paso Electric Company and First Solar, electricity will be sold from First Solar’s thin-film solar panels to El Paso Electric Company for 5.8 cents per kWh (a good 4-8 cents cheaper than new coal, which is in the 10-14 cents per kWh range). A First Solar installation of some of its CdTe panels. The name of the power plant is Macho Springs Solar Park. Clearly, even compared to the wholesale price of electricity from the cheapest energy options, this is quite competitive. Follow me on Twitter: @Kompulsa

‘Artificial leaf’ makes fuel from sunlight Researchers led by MIT professor Daniel Nocera have produced something they’re calling an “artificial leaf”: Like living leaves, the device can turn the energy of sunlight directly into a chemical fuel that can be stored and used later as an energy source. The artificial leaf — a silicon solar cell with different catalytic materials bonded onto its two sides — needs no external wires or control circuits to operate. Simply placed in a container of water and exposed to sunlight, it quickly begins to generate streams of bubbles: oxygen bubbles from one side and hydrogen bubbles from the other. If placed in a container that has a barrier to separate the two sides, the two streams of bubbles can be collected and stored, and used later to deliver power: for example, by feeding them into a fuel cell that combines them once again into water while delivering an electric current. The creation of the device is described in a paper published Sept. 30 in the journal Science.

NASA develops 3D printing factory in space News: NASA is developing an orbiting factory that will use 3D printing and robots to fabricate giant structures such as antennas and solar arrays of up to a kilometre in length, as part of its ongoing search for extra-terrestrial life. The US space agency this week announced it was awarding technology firm Tethers Unlimited Inc (TUI) a $500,000 contract to develop the facility. The NASA funding - a second-phase contract that follows an initial contract issued earlier this year - will allow TUI to continue work on its SpiderFab technology, which allows large-scale spacecraft components to be built in space, avoiding the expense of building the components on earth and transporting them into space using rockets. “On-orbit fabrication allows the material for these critical components to be launched in a very compact and durable form, such as spools of fiber or blocks of polymer, so they can fit into a smaller, less expensive launch vehicle.” Via GigaOm. Here's a press release from TUI:

Tesla Technology: 5 Bladeless Turbines About To Revolutionize Energy Production Tesla Technology: 5 Bladeless Turbines About To Revolutionize Energy Production “Every home in America can run on wind energy. In fact these units can be installed on existing power poles in rural areas, to catch the wind and send its energy back to the plant.” - Raymond Green, Inventor In 1913, Inventor Nikola Tesla patented a bladeless steam turbine that he claimed was the most efficient and the most simple rotary engine ever designed. One century later, we now have all the materials needed to build Tesla’s turbine, and in 2010, a patent was issued to a company called Solar Aero for a wind turbine based on the Tesla design. Current wind turbine technology with rotating blades is both inefficient, and causes noise pollution, which has been reported to have detrimental health effects on residents living nearby. Bladeless Wind Turbine #1: ‘The Saphonian’ Bladeless Wind Turbine #2: ‘The EWICON’

Photosynthesis Fuel Company Gets a Large Investment Green tea: Joule Energy’s SolarConverter turns carbon dioxide and sunlight into ethanol fuel at a pilot plant in Leander, Texas. Joule Unlimited, a startup based in Bedford, Massachusetts, has received $70 million to commercialize technology that uses microörganisms to turn sunlight and carbon dioxide into liquid fuel. The company claims that its genetically engineered bacteria will eventually be able to produce ethanol for as little as $1.23 a gallon or diesel fuel for $1.19 a gallon, less than half the current cost of both fossil fuels and existing biofuels. The new funding comes from undisclosed investors and will allow the company to expand from an existing pilot plant to its first small-scale production facility, in Hobbs, New Mexico. Joule Unlimited has designed a device it calls the SolarConverter, in which thin, clear panels circulate brackish water and a nitrogen-based growth medium bubbling with carbon dioxide.

Prusa Bonjour, En suivant les différents articles que j’ai publié jusqu’à maintenant, vous devriez arriver à un résultat semblable à celui-ci, voir mieux si vous êtes plus ordonné que moi. Afin de poursuivre notre avancée vers le fonctionnement final de la Prusa, nous allons voir comment monter, positionner et enfin paramétrer les fins de course (switchs). Tout d’abord, il faut savoir que les capteur de fin de course ont 2 fonctions au sein de la Reprap ( et des autres imprimantes). Prévenir le shield RAMPS que le chariot de l’extrudeur a atteint l’une des extrémités des axes et qu’il faut stopper le moteur sous peine de casser le matériel. A savoir: le fonctionnement de ces 2 types de capteurs est inversé, l’extrudeur est arrivé en fin de course lorsque qu’un capteur mécanique est en position fermé (languette rabattue) ou lorsqu’un capteur optique st en position ouverte ( faisceau coupé). * les switchs mécaniques: * les switchs optiques: Etape 1 : Etape 2 : Insérer la Led dans l’emplacement prévu.

Update! 15 PowerPoint Slides That Shook the Earth : Greentech Media If you attend enough cleantech events or are pitched by enough startups, you start to see the same few PowerPoint slides over and over again. Here is a collection of the best or at least the most notorious and historically significant slides in our industry. This collection has been one of our most popular pieces and I'm taking the opportunity to update some of the charts and add some additional commentary. After publishing this list to an overwhelming response, we heard from the original architects of some of these iconic greentech slides and we made sure to give them their overdue credit. From the BP Statistical Review of World Energy -- here's a painful reminder of what we pay at the pump. Make sure to contrast that with the Price Trends in Solar Modules in this slide with data from IPCC and Paula Mints of Navigant. Lawrence Livemore's classic Energy Flowchart: A good slide provides a wealth of information in an intuitive, understandable way -- and this slide certainly does that.

We dump 8 million tons of plastic into the ocean each year. Where does it all go? What happens to all our plastic bottles and lids and containers after we toss them out? Every single ocean now has a massive swirling plastic garbage patch The vast majority of plastic trash ends up in landfills, just sitting there and taking thousands of years to degrade. A smaller fraction gets recycled (about 9 percent in the United States). But there's another big chunk that finds its way into the oceans, either from people chucking litter into waterways or from storm-water runoff carrying plastic debris to the coasts. And scientists have long worried that all this plastic could have adverse effects on marine life. Now we can finally quantify this problem: A new study in Science calculates that between 5 and 13 million metric tons of plastic waste made it into the ocean in 2010 alone. Plastic debris in the Mediterranean Sea. And here's another surprise twist: We still don't know where most of that ocean plastic actually ends up. China accounts for one-quarter of plastic ocean waste