Archive for the ‘solar power’ category: Page 137
Oct 4, 2015
$0.55 per watt from SolarCity’s record-breaking new solar panel
Posted by Shailesh Prasad in categories: solar power, sustainability
A new solar panel technology from SolarCity is the most efficient rooftop solar ever released. Can it finally push solar to mass adoption?
Oct 1, 2015
Graphene nanoribbons as electronic highways
Posted by Shailesh Prasad in categories: materials, physics, solar power, sustainability
Physicists have developed a method to synthesise a unique and novel type of material which resembles a graphene nanoribbon but in molecular form. This material could be important for the further development of organic solar cells.
Sep 26, 2015
The Future is Clear
Posted by Shailesh Prasad in categories: mobile phones, solar power, sustainability
Transparent solar panels!
Imagine a city that’s actually a vast solar energy harvesting system. A team of Michigan State University researchers has developed a technology that can turn transparent surfaces, from building windows to cell phones, into solar collecting surfaces – without obstructing the view.
Sep 23, 2015
Transparent coating keeps solar cells cool and efficient throughout the day
Posted by Shailesh Prasad in categories: solar power, space, sustainability
Stanford engineers have developed a transparent silicon overlay that can increase the efficiency of solar cells by keeping them cool. The cover collects and then radiates heat directly into space, without interfering with incoming photons. According to a local HVAC Spokane, WA company, “If mass-produced, the development could be used to cool down any device in the open air – for instance, to complement air conditioning in cars.”
After a full day in the sun, solar cells in California can approach temperatures of 80° C (175° F), even in winter months. Excessive heat can pose problems because, while the cells need sunlight to harvest energy, they also lose efficiency as they heat up. A standard silicon cell, for example, will drop from 20 to 19 percent efficiency by heating up just 10° C (18° F) or so.
Laptops address the overheating problem with the help of carefully engineered fans and heat sinks, but for solar panels and other devices that work in the open air, space itself could serve as heat sink par excellence. The coolness of space, approaching absolute zero, would negate the need for elaborate and expensive heat dissipation contraptions – if only we had a way to access it from the ground.
Sep 21, 2015
Gigantic Energy-Generating Waterfall Skyscraper Could Power the 2016 Rio Olympics
Posted by Shailesh Prasad in categories: solar power, sustainability
The Solar City Tower, designed by RAFAA, includes a bank of solar panels as well as pumped water storage to create energy during both the day and night for use in the Olympic Village.
Sep 21, 2015
Open Source ‘Solar Pocket Factory’ Can 3D Print a Solar Panel Every 15 Seconds
Posted by Shailesh Prasad in categories: 3D printing, computing, electronics, mobile phones, solar power, sustainability
Shawn Frayne and Alex Hornstein, two young inventors based in the Philippines, are taking their passion for clean free energy and developing a way to make it accessible and cheap for everyone. These guys are working restlessly to provide a product that could be used by practically anyone to make homemade solar panels.
The factory is small enough to fit on a desktop and efficient enough to produce 300k to one million panels per year, up to one every 15 seconds. By cutting out much of the labor intensive process, which represents 50% of the total cost, this machine can dramatically reduce the price of solar. Their pocket solar panel producer can change the way the world views electricity. Image credit: YouTube/SciFri
Continue reading “Open Source ‘Solar Pocket Factory’ Can 3D Print a Solar Panel Every 15 Seconds” »
Sep 20, 2015
Solar panels as inexpensive as paint?
Posted by Shailesh Prasad in categories: engineering, materials, solar power, sustainability
Fortunately, that is changing because researchers such as Qiaoqiang Gan, University at Buffalo assistant professor of electrical engineering, are helping develop a new generation of photovoltaic cells that produce more power and cost less to manufacture than what’s available today.
One of the more promising efforts, which Gan is working on, involves the use of plasmonic-enhanced organic photovoltaic materials. These devices don’t match traditional solar cells in terms of energy production but they are less expensive and — because they are made (or processed) in liquid form — can be applied to a greater variety of surfaces.
Gan detailed the progress of plasmonic-enhanced organic photovoltaic materials in the May 7 edition of the journal Advanced Materials. Co-authors include Filbert J. Bartoli, professor of electrical and computer engineering at Lehigh University, and Zakya Kafafi of the National Science Foundation.
Sep 16, 2015
New Solar Panels That Work At Night
Posted by Shailesh Prasad in categories: materials, nanotechnology, solar power, sustainability
Despite the enormous untapped potential of solar energy, one thing is for sure- photovoltaics are only as good as the sun’s rays shining upon them. However, researchers at the Idaho National Laboratory are close to the production of a super-thin solar film that would be cost-effective, imprinted on flexible materials, and would be able to harvest solar energy even after sunset!
Sep 15, 2015
Nanoscale Solar Cells Outperform Traditional Technology
Posted by Shailesh Prasad in categories: computing, information science, materials, nanotechnology, solar power, sustainability
Scientists have designed a novel type of nanoscale solar cell. Initial studies and computer modelling predict these cells will outperform traditional solar panels, reach power conversion levels by over 40 percent.
Solar power cells work through the conversion of sunlight into electricity using photovoltaics. Here solar energy is converted into direct current. A photovoltaic system uses several solar panels; with each panel composed of a number of solar cells. This combines to create a system for the supply usable solar power.
To investigate what is possible in terms of solar power, the researchers have examined the Shockley-Queisser limit for different materials. This equation describes the maximum solar energy conversion efficiency achievable for a particular material, allowing different materials to be compared as candidates for power generation.
