tutorial Vertical Axis Wind Turbine v1.0 Contents of this tutorial: Description How to use this tutorial Tools Materials Step by step instructions Mounting and applications Description: This is a Vertical Axis Wind Turbine which uses wind energy to drive things like air and water pumps for cooling, irrigation and similar, or an alternator/generator for producing electricity. The turbine uses the 35-40% mechanically efficient Lenz2 lift+drag design. It is made entirely from scrap materials except for the bolts and pop rivets, and should cost about $15-$30 for the six vane version, which can be made by two people in six hours without much effort.
scientists build the first all-carbon solar cell By Mark Shwartz Mark Shwartz Stanford Professor Zhenan Bao talks about the carbon solar cell research. 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.
A DIY Home Wind Turbine For Just $30? Here's The Blueprint These days, there are plenty of good options to help you go off-grid. But they all involve a certain financial commitment. A home wind turbine, for instance, is likely to set you back about $30,000, according to the American Wind Energy Association. 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. Compact Wind Turbine for houses May 28, 2014 | by Agis F A compact and quiet wind turbine, a windmill, that you can place more than one on just about any house. Developed by Research & Development Company the Archimedes, the Liam F1 Urban Wind Turbine has an energy yield that is “80 percent of the greatest that theoretically can be done,” compared to the conventional ones, that average around 25 – 50 percent. “This unique windmill, combining a tight and elegant design with impressive and unequalled performance, is based on the laws of nature and the theoretics of the Greek mathematician Archimedes. This compact wind turbine, with a diameter of only five feet, will cause a revolution in the world of generating electrical power and resistance theories.
V3Solar Spin Cell Clean Power Published on January 24th, 2013 | by Zachary Shahan Quite frankly, if the company’s numbers are correct, this could be some big solar news. (CleanTechnica got the inside scoop due to our sincere “passion” for helping the world, and probably also our status as the top cleantech or clean energy site in the world.) The key will be whether or not the technology performs as expected once a production prototype is created, and (even more so) if it eventually gets to mass production. As a quick refresher, we’ve covered V3Solar before, back when the name was Solarphasec. How to grow and harvest "cut and come again" lettuce, for perpetual salad greens There's something beautiful about growing and harvesting a whole head of fresh lettuce from the garden, and it can be well worth the wait, but for both an earlier and an extended harvest of salad greens, the cut and come again method can yield an abundance of leafy green goodness all season long. Lettuce is one of those fairly simple to grow garden crops, as it doesn't require pollination or waiting quite as long as other veggies in order to harvest and enjoy, but if you want to grow head lettuce, it does take a bit of patience. If you're an impatient gardener, or want to extend your salad harvesting season, you might consider planting a bed or two with leaf lettuce that can be cut over and over again.
Calculation of sun’s position in the sky for each location on the earth at any time of day. Home > Solar tools > Sun Position Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | Annual sun path Set the data as you want and click on email image to get the file in attach.The excel file contain the sun path for one year, with step (5,10,15,20,30,60 min), for the moment limited because is too heavy for the server. The hot poop on alternative toilets, Tiny house edition After covering the wonderful Tiny Tack House, Commenter Marrena noted: A bucket and sawdust! That's pretty hillbilly for most people. I see that the other similar tiny home you feature here, Alek Lisefski's Tiny Project, also did the bucket and sawdust routine. There has got to be a better solution.
New connection between stacked solar cells can handle energy of 70,000 suns (Phys.org) —North Carolina State University researchers have come up with a new technique for improving the connections between stacked solar cells, which should improve the overall efficiency of solar energy devices and reduce the cost of solar energy production. The new connections can allow these cells to operate at solar concentrations of 70,000 suns worth of energy without losing much voltage as "wasted energy" or heat. Stacked solar cells consist of several solar cells that are stacked on top of one another. Stacked cells are currently the most efficient cells on the market, converting up to 45 percent of the solar energy they absorb into electricity. But to be effective, solar cell designers need to ensure the connecting junctions between these stacked cells do not absorb any of the solar energy and do not siphon off the voltage the cells produce—effectively wasting that energy as heat.
Solar Food Dryers? (food preservation forum at permies) thomas wrote: 1. I want the added benefit of the box being black but the thought of paint is unappealing. Was thinking maybe a homemade concoction of black walnut stain? dellartemis wrote: That sounds cool! Um.....what about soot rubbed into the wood? might be messy if you tough it later though.... Most Solar Panels Facing the Wrong Way, Experts Say It’s long been thought that pointing solar panels south (for locations in the Northern Hemisphere) will lead to best performance and energy output, but it turns out that pointing them west is more effective because peak demand on the power grid is in the afternoon and evening. Maximizing solar power during that period is more useful at reducing the need for sources of energy that pollute. Experts at the Pecan Street Research Institute have found that the key to solar panel efficacy is not only how much electricity is produced but also when it is produced.
Lopez Labs - Double Bell Heater Construction and Testing Workshop with Alex Chernov and Norbert Senf The workshop took place at Alex Chernov's house. Alex kicked it off on Friday morning with a classroom session describing the test heater we would build. It incorporates a number of features allowing changes to the firebox air systems and gas path in the heat exchange section.