Smog-fighting helicopters in Delhi grounded – due to smog

November 14, 2017 by  
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Delhi has been battling choking smog , prompting doctors to declare a public health emergency . The government came up with a plan: use helicopters to combat the air pollution . But there’s a problem: the helicopters can’t fly because the smog is so bad. Delhi’s government had asked state-owned company Pawan Hans to come up with a plan to deploy helicopters to drizzle water across the beleaguered city, with the hope it would help settle the smog. But Pawan Hans told city officials this week the choppers couldn’t fly in the haze. Chairman and managing director BP Sharma told The Indian Express , “Right now, with the prevailing smog, it is not possible for the helicopters to carry out operations.” Related: Delhi residents struggle to breathe as doctors declare air pollution health emergency There’s another roadblock that stands in the way: almost half of Delhi, according to an official, is part of a no-fly zone. This includes the city’s southern quarters where the prime minister, presidency, and parliament are based – and according to The Guardian , the no-fly zone is strictly policed. A Delhi government spokesperson told The Indian Express, “There are a few issues and these will be worked out while creating the [standard operating procedure]. All stakeholders are being consulted.” Experts had questioned the plan – one called it “nothing more than a load of hot air,” according to India Today . Mukesh Khare, Indian Institute of Technology Delhi professor who’s spent years working on urban air pollution, said the solution was impractical and would waste water and money, telling India Today the plan hadn’t been used anywhere in the world to take down air pollution, and that the water would dry rapidly, sending officials back to square one in a few hours. 52 percent of the particulate matter in Delhi’s air comes from dust kicked up by tens of thousands of cars , according to a 2015 study cited by The Guardian. Other factors like uncovered soil and sand from construction sites, crop burning, and slow winds have also played a role in the pollution. Via The Guardian , The Indian Express , and India Today Images via Jean-Etienne Minh-Duy Poirrier on Flickr and Shalabh Gupta on Facebook

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Smog-fighting helicopters in Delhi grounded – due to smog

AeroVelo’s Human-Powered Helicopter May Be On Track to Win the $250,000 Sikorsky Prize

June 17, 2013 by  
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The Atlas helicopter, designed and built by Canadian team AeroVelo , might be the first human-powered helicopter to reach a height of three meters for at least 60 seconds—two key parameters for the $250,000 Sikorsky Prize . The competition to build a human-powered helicopter was established in 1980, and it has not yet been won. Aerovelo’s helicopter hit precisely 3.3 meters and maintained flight for 65 seconds last Thursday, a result which could bring it the much coveted prize. The team submitted all the flight data and is awaiting the committee’s official review and validation. Read the rest of AeroVelo’s Human-Powered Helicopter May Be On Track to Win the $250,000 Sikorsky Prize Permalink | Add to del.icio.us | digg Post tags: AeroVelo helicopter , aircraft green design , American Helicopter Society , Atlas human-powered helicopter , Gamera , gamera helicopter , green transportation , helicopter design , helicopters , human-powered vehicle , Sikorsky , Sikorsky Prize , sustainable aircraft        

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AeroVelo’s Human-Powered Helicopter May Be On Track to Win the $250,000 Sikorsky Prize

Renzo Piano’s Tiny Diogene Hut is an Off-Grid Shelter for One Person

June 17, 2013 by  
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Read the rest of Renzo Piano’s Tiny Diogene Hut is an Off-Grid Shelter for One Person Permalink | Add to del.icio.us | digg Post tags: Diogene , Diogene Cabin , Diogene hut , net-zero energy , off-grid cabin , photovoltaic , rainwater retention , renzo piano , Solar Power , tiny house , Vitra , Vitra Campus , Zero Energy House        

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Renzo Piano’s Tiny Diogene Hut is an Off-Grid Shelter for One Person

Maryland’s students set world record to pilot human powered helicopter

August 10, 2011 by  
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Anchal Bhatia: Human powered helicopter Designed by University of Maryland Even though the goal to win the Sikorsky Prize by the American Helicopter Society worth $250,000 was not achieved, the students at the University of Maryland succeeded in setting a new milestone. Gamera, named after a giant flying turtle is a human powered helicopter designed by the engineering students, which hovered for more than 12 seconds inside the university’s campus. Human powered helicopter Designed by University of Maryland A new world record is believed to have been set by a biology student Judy Wexler for a longest human powered helicopter flight by a woman. Moreover, she also past flew the national record for the longest human powered flight, which previously was for only four seconds. To get this hovering action going and to setup this new record, Maryland faculty members and students have been working on the design for more than two years. At present, the helicopter weighs only 140lbs excluding the pilot as it was designed using lightweight materials such as balsa wood, foam and carbon fiber. Gamera is currently being modified and prepared for another take off expected in the next six months. Next take off will aim to fly at-least for 30 seconds, minimum three meters above the ground to enable the engineering students to win the Sikorsky Award. Via: Physorg

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Maryland’s students set world record to pilot human powered helicopter

Duke University engineer proposes hydrogen from a hybrid solar system

August 10, 2011 by  
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Gaurav Thakur: Solar Panels Hybrid solar system for rooftop hydrogen While photovoltaic cells are used worldwide to produce electricity from solar energy, Nico Hotz, an engineer from Duke University has come up with a hybrid solar system to produce hydrogen. His research was funded by the Swiss National Science Fund, while his paper was adjudged as the top paper in ASME Energy Sustainability Fuel Cell 2011 conference in Washington. The setting consists of a maze of glass tubes with water and methanol. The copper tubes are coated with a layer of aluminum and aluminum oxide. The tubes have nano-particles that are used to carry out catalytic reactions. After the sunlight heats up this combination of water and methanol, catalytic reactions are used to produce hydrogen. This hydrogen can then be stored in fuel cells. The hydrogen produced in this way much more efficient and has lesser impurities. The setup achieved exergetic efficiencies of 28.5 and 18.5, in summer and winter, respectively. The figure stands at 5 to 15 percent and 2.5 to 5 percent for conventional systems in summer and winter, respectively. As compared to conventional systems it absorbs 95 percent of sunlight and very little of it is wasted to surroundings. The set up is able to achieve temperatures beyond 200 degrees Celsius as compared to 60 to 70 degrees Celsius for solar collectors. The total installation costs for the set up are around $7,900, which is less than conventional solar equipment, but higher than conventional fossil fuel generators. In this age of energy crisis solar energy is certainly the future. In future hydrogen is expected to join electricity as a major energy carrier. It has an important advantage of ‘zero emissions’. Technologies like this present to us new ways to utilize solar energy to meet our current energy needs. Via: Duke University

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Duke University engineer proposes hydrogen from a hybrid solar system

9MW New Jersey Solar Roof Will Be Biggest in the USA

July 13, 2011 by  
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Excuse the helicopters. It was surprisingly hard to find an image of the Gloucester facility. Image credit: Holt Logistics When I wrote about Renault’s 60MW solar project in France , I noted that it is getting hard to decide what is impressive these days in the world of solar power. No sooner do I write about a refrigerated warehouse in Baltimore staying cool through … Read the full story on TreeHugger

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9MW New Jersey Solar Roof Will Be Biggest in the USA

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