The minimal seismic anchors were installed at a rate of up to five per man hour. Combined, the arrays were spread over more than ten individual flat roofs.
The Environmental Governance approach of Osaka is exemplary for the developing Asian cities who are trying to balance development and sustainability.
By Andrew Freedman for Mashable: The partial solar eclipse slated to take place throughout Europe on March 20 may delight skywatchers, but it's presenting a significant headache for the operators of Germany's electricity grid. The country is a world leader in solar energy, boasting a huge edge over the U.S. in installed solar power generation. When the eclipse occurs between about 9:30 a.m. and 12 p.m., local time, on the 20th, electric utilities in Germany will have to contend with rapid swings in energy production. First, there will be a steep drop-off in generation, followed by a sudden spike. These fluctuations, and how utilities choose to cope with them, provide a preview of what utilities in the U.S. and other nations face, as renewable energy production soars in coming decades, according to an analysis from Opower, a software company that uses data to help utilities improve the customer experience. Germany gets about 7% of its electricity each year from solar panels, compared to 0.5% in the U.S., according to Barry Fischer, a writer and analyst at Opower. On the sunniest days, Germany can meet half of its electricity demand through solar power alone, he told Mashable in an interview.
In a study published March 9 in Nature Chemistry, University of Wisconsin-Madison chemistry Professor Kyoung-Shin Choi presents a new approach to combine solar energy conversion and biomass conversion, two important research areas for renewable energy. For decades, scientists have been working to harness the energy from sunlight to drive chemical reactions to form fuels such as hydrogen, which provide a way to store solar energy for future use. Toward this end, many researchers have been working to develop functional, efficient and economical methods to split water into hydrogen, a clean fuel, and oxygen using photoelectrochemical solar cells (PECs). Although splitting water using an electrochemical cell requires an electrical energy input, a PEC can harness solar energy to drive the water-splitting reaction. A PEC requires a significantly reduced electrical energy input or no electrical energy at all. In a typical hydrogen-producing PEC, water reduction at the cathode (producing hydrogen) is accompanied by water oxidation at the anode (producing oxygen). Although the purpose of the cell is not the production of oxygen, the anode reaction is necessary to complete the circuit. Unfortunately, the rate of the water oxidation reaction is very slow, which limits the rate of the overall reaction and the efficiency of the solar-to-hydrogen conversion. Therefore, researchers are currently working to develop more efficient catalysts to facilitate the anode reaction. Choi, along with postdoctoral researcher Hyun Gil Cha, chose to take a completely new approach to solve this problem. They developed a novel PEC setup with a new anode reaction. This anode reaction requires less energy and is faster than water oxidation while producing an industrially important chemical product. The anode reaction they employed in their study is the oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). HMF is a key intermediate in biomass conversion that can be derived from cellulose - a type of cheap and abundant plant matter. FDCA is an important molecule for the production of polymers.
With its wings stretched wide to catch the sun's energy, a Swiss-made solar-powered aircraft took off from Abu Dhabi just after daybreak Monday in a historic first attempt to fly around the world without a drop of fossil fuel. Solar Impulse founder André Borschberg was at the controls of the single-seat aircraft when it lumbered into the air at the Al Bateen Executive Airport. Borschberg will trade off piloting with Solar Impulse co-founder Bertrand Piccard during layovers on a 35,000-kilometer (21,700-mile) journey. Some legs of the trip, such as over the Pacific and Atlantic oceans, will mean five days and five nights of flying solo. Both pilots have been training hard for this journey, which will span 25 flight days over five months before this Spruce Goose of renewable energy returns to Abu Dhabi in late July or August. "It is also exciting because you know, you simulate, you calculate, you imagine, but there is nothing like testing and doing it in real," Borschberg said just hours before takeoff. "I am sure we are all confident and hopefully we will be able to see each other here in five months." The Solar Impulse 2 aircraft, a larger version of a single-seat prototype that first flew five years ago, has a wingspan of 72 meters (236 feet), larger than that of the Boeing 747. Built into the wings are 17,248 ultra-efficient solar cells that transfer solar energy to four electrical motors that power the plane's propellers. The solar cells also recharge four lithium polymer batteries.
Nexus eWater has developed the world's first practical water and energy recycler for homes. The estimated annual US market for this new product suite is projected at $15 billion per year. The patented product collects a home’s grey water (the drain water from showers and laundry), then cleans it to the highest standard for at-home recycling for lawn watering and other approved uses. Additionally, the system captures and re-uses the heat found in the grey water for further recycling. The system is available for both new homes and for retrofits. The international investor team includes Canberra-based venture fund ANU Connect Ventures (ANUCV), the Sydney Angels and the Sydney SideCar Fund. The round was led by Thomas Reeves Hitchner, the retired general partner of Baltimore-based venture fund, QuestMark Partners. Proceeds from this funding cycle will complete the initial product roll-out of Nexus’ on-site water and energy recycling products for the California and US market. The Nexus system is affordable, robust and efficient. It is a sustainability “triple play.” For a house with a family of four, the system provides these three benefits: Reduces in-home water usage by 40%, (up to 200 gallons per day) by recycling 67% of the water used in a house; Reduces wastewater by 70%, (up to 200 gallons per day); and Reduces home electric energy usage by 10-20%. The energy recycler provides the equivalent power of a 1.5 kW solar array, but at a fraction of the cost. In large, older homes, this amount could be tripled. Energy recycling is accomplished by using a patented heat pump system, which harvests the energy from the warm grey water and then uses that energy to heat fresh, new water for the home. By recycling this energy, the home’s water can be heated using 75% less energy than any conventional tank or tankless water heater.
By JONATHAN SOBLE for NY Times: Rice fields, golf courses and even a disused airport runway. All over the southern Japanese region of Kyushu, unexpected places gleam with electricity-producing solar panels. Solar use in Japan has exploded over the last two years as part of an ambitious national effort to promote renewable energy. But the technology’s future role is now in doubt. Utilities say their infrastructure cannot handle the swelling army of solar entrepreneurs intent on selling their power. And their willingness to invest more money depends heavily on whether the government remains committed to clean energy. “It’s upsetting,” said Junji Akagi, a real estate developer on Ukushima, a tiny island near Nagasaki. Mr. Akagi said he hoped to turn a quarter of the island’s 10-square-mile area into a “mega-solar” generating station, and has already lined up investors and secured the necessary land. Then last September, Kyushu Electric Power Company, the region’s dominant utility, abruptly announced that it would stop contracting to buy electricity from new solar installations. Other power companies elsewhere in Japan soon followed suit.
From GovTech.com: Sonoma County, Calif.'s new public electricity supplier is turning to the sun and water — the airspace over treated sewage ponds, specifically — to generate power for local homes and businesses. Under a deal signed Thursday with a San Francisco-based renewable energy developer, officials with Sonoma Clean Power, now the default electricity provider in Sonoma County, unveiled a plan to install a 12.5-megawatt solar farm on floating docks atop holding ponds operated by the county Water Agency. When completed in 2016, the project, which will provide enough electricity to power 3,000 homes, will be the largest solar installation in the county. It also will help fulfill one of Sonoma Clean Power’s central goals — to develop local sources of renewable energy for its expanding customer base, now taking in more than 160,000 residential and commercial accounts across five cities in the county.
Spray-on solar cells use nanotechnology. These cells are made using quantum dots, which is a nanocrystal composed of a semiconductor material that is small enough to take advantage of the laws of quantum mechanics.
A reflective surface reduces smog by reflecting heat back into the atmosphere. Not only is the smog reduced, but more importantly, energy costs are lowered in big cities.
The US and China will be in the 12-15 GW range in 2015 but the incremental growth will come from some of these emerging markets. We expect Mexico to be a 2 GW market by 2017, with South Africa also above the 1 GW mark by 2017. These two markets were stagnant in 2013-14, so the growth will be quite significant in the coming years.
The goal of this program is to increase the efficiency of Array Technologies' commercial sales process while providing customers with access to the highest quality turnkey solar services with Array Technologies' tracking systems.
A sea change is gathering as the country contemplates embracing the promise of solar-powered electricity.
Google Inc. is making its largest bet yet on renewable energy, a $300 million investment to support at least 25,000 SolarCity Corp. rooftop power plants. Google is contributing to a SolarCity fund valued at $750 million, the largest ever created for residential solar, the San Mateo, California-based solar panel installer said Thursday in a statement. Google has now committed more than $1.8 billion to renewable energy projects, including wind and solar farms on three continents. This deal, which may have a return as high as 8 percent, is a sign that technology companies can take advantage of investment formats once reserved only for banks. “Hopefully this will lead other corporations to invest in renewable energy,” SolarCity Chief Executive Officer Lyndon Rive said in a phone interview. The deal reflects the success of renewable energy companies in tapping into a broader pool of investors with financial products that emerged in the past three years, either paying dividends or sheltering cash. Those helped boost investment in clean energy 16 percent to a record $310 billion last year, according to data compiled by Bloomberg.
France's most recognisable landmark, the iron Eiffel Tower erected in 1889, has seen its iconic frame festooned with many different decorations and objects over the years for various celebrations. Its latest addition is a little more subtle -- and maybe a little more in keeping with the tower's original purpose as a monument to human ingenuity and artistry. As part of a major renovation and upgrade to the tower's first floor, the Société d'Exploitation de la Tour Eiffel will be adding a variety of sustainability features -- the first of which is a pair of VisionAIR5 wind turbines designed by renewable energy specialist Urban Green Energy. The two vertical-axis turbines have been installed on the tower's second level, about 122 metres (400ft) from the ground -- a position that maximises wind capture. The turbines have been specially painted so as to blend in with the tower, and produce virtually no sound. They can also capture wind from any direction, producing, between them, a total of 10,000kWh per year -- enough to power the tower's first floor.
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