Anjana Pasricha for VOA News: Indian scientists have designed a “solar tree” that they hope will help overcome one of the key challenges the country faces in the generation of solar power.
With photovoltaic panels placed at different levels on branches made of steel, “solar trees” could dramatically reduce the amount of land needed to develop solar parks.
“It takes about four-square meters of space to produce energy which otherwise would have required 400 square meters of space. So almost 100 times the space is saved, which as you know is very valuable,” said Daljit Singh Bedi, chief scientist at the Council of Scientific and Industrial Research (CSIR) in New Delhi, whose laboratory in Kolkata developed the tree.
A scarce resource in India, acquisition of land to develop roads, factories and other infrastructure is a sensitive issue that has led to frequent and sometimes violent protests from displaced people. Cont'd...
Louis Sahagun for The LA Times: The San Bernardino County Board of Supervisors has rejected a controversial solar plant proposed for the Mojave Desert’s Soda Mountains, citing concerns that the project would destroy habitat and block ancient trails used by bighorn sheep for thousands of years.
In a 3-2 vote, the board on Tuesday declined to certify documents required under state law in order to issue county permits for the project on public land along Interstate 15 near the entrances to Joshua Tree National Park and Death Valley National Park, and less than a mile from the Mojave National Preserve.
“We endorse renewable energy, but this was the wrong project in the wrong location,” said Supervisor Robert A. Lovingood. Cont'd...
Walt Mills for Phys.org: The energy-storage goal of a polymer dielectric material with high energy density, high power density and excellent charge-discharge efficiency for electric and hybrid vehicle use has been achieved by a team of Penn State materials scientists. The key is a unique three-dimensional sandwich-like structure that protects the dense electric field in the polymer/ceramic composite from dielectric breakdown. Their results are published today (Aug. 22) in the Proceedings of the National Academy of Sciences (PNAS).
"Polymers are ideal for energy storage for transportation due to their light weight, scalability and high dielectric strength," says Qing Wang, professor of materials science and engineering and the team leader. "However, the existing commercial polymer used in hybrid and electric vehicles, called BOPP, cannot stand up to the high operating temperatures without considerable additional cooling equipment. This adds to the weight and expense of the vehicles." Cont'd...
Cat Distasio for inhabitat: Many countries are on the brink of becoming self-sufficient in their clean energy production, thanks to advances in battery technology that allow electricity from renewable sources to be stored and used on demand. Over the years, as renewable energy generation methods have charged forward, utility companies have struggled with how to integrate that clean energy in usable ways. Now, scientists at Harvard, MIT, Stanford, the Lawrence Livermore and Oak Ridge labs, and other agencies are working on energy storage projects funded by the U.S. Department of Energy, with their sights set on what the department calls the ‘holy grail’ of energy policy. The department says the industry could be transformed in as little as five to ten years.
Earlier this year, Advanced Research Projects-Energy (ARPA-E), the division of the U.S. Department of Energy founded in 2009 to oversee these projects, claimed to have achieved that goal. Without pointing to a specific invention or discovery, ARPA-E insists that the solution lies amid the 75 projects the agency is funding. The breakthrough technology—the next generation of renewable energystorage—is expected to be developed for large-scale usage in as little as five to ten years. Cont'd...
Stanley Reed for The New York Times: A project to install hundreds of wind turbines in the Fosen peninsula area of Norway at one point was shelved as unfeasible. The strong breezes that whip off the sea can shift and swing unpredictably, while the soaring cliffs and steep drop-offs create turbulence that wears out expensive equipment.
The venture was rescued with a lot of help from the mathematical calculations of Vestas Wind Systems, a Danish wind power company. Vestas used data to figure out how to use more powerful turbines for the project, and precisely where to place them. That meant the utility developing the facility could buy fewer turbines, helping cut costs and balancing the economics of the $1.2 billion project.
The company is at the forefront of efforts to make wind a competitive source of energy, rather than just a subsidized experiment. In doing so, it has become a model for the renewables industry, which has struggled at times to remain viable while facing cuts to government subsidies and volatile oil and gas prices. Vestas understands the fickleness of the renewable energy business. Cont'd...
Lucas Mearian for ComputerWorld: Five million roofs are replaced each year in the U.S., so instead of simply swapping out old shingles with new ones, why not turn the whole roof into a solar power generator that's integrated with your home's electrical utility?
That is SolarCity's plan for a new product it expects to begin producing next year, according to statements made during the company's second-quarter earnings calllast week.
During the call, SolarCity Chief Technology Officer Peter Rive alluded to a new product that would be produced at the soon to open Buffalo, N.Y., solar panel manufacturing facility. Then SolarCity co-founder and Chairman Elon Musk interjected and said the product would be a solar roof, "as opposed to a [solar] module on a roof." Cont'd...
JAKE LINGEMAN for AutoWeek: Aim for those bumps; save the planet. Audi is working on a new suspension system called eROT (electromechanical rotary damper) that turns the kinetic energy of damper travel into usable, fuel-saving power.
“Every pothole, every bump, every curve induces kinetic energy in the car. Today’s dampers absorb this energy, which is lost in the form of heat,” said Dr. Stefan Knirsch, board member for technical development at Audi AG. “With the new electromechanical damper system in the 48-volt electrical system, we put this energy to use. It also presents us and our customers with entirely new possibilities for adjusting the suspension.”
The electromechanical dampers are arranged horizontally and feed electricity from the motion -- 100 to 150 watts on an average road during testing in Germany -- to a lithium-ion battery. A DC converter connects the 48-volt electrical subsystem to the 12-volt primary. Cont'd...
Phys.org: University of Delaware researchers report in a new study that offshore wind may be more powerful, yet more turbulent than expected in the North Eastern United States.
The findings, published in a paper in the Journal of Geophysical Research: Atmospheres, could have important implications for the future development of offshore wind farms in the U.S., including the assessment of how much wind power can be produced, what type of turbines should be used, how many turbines should be installed and the spacing between each.
The study, led by Cristina Archer at UD and Brian Colle at Stony Brook University, analyzed historical data from 2003-2011 at the Cape Wind tower located near the center of Nantucket Sound off the coast of Martha's Vineyard, Massachusetts, and collected complementary data at the same location in 2013-2014.
Co-authors on the paper, titled "On the predominance of unstable atmospheric conditions in the marine boundary layer offshore of the U.S. northeastern coast," include UD professors Dana Veron and Fabrice Veron, and Matthew Sienkiewicz from Stony Brook.
The paper's main finding is that atmospheric conditions around Cape Wind are predominantly turbulent, or unstable, which is in stark contrast to prevailing data from European offshore wind farms in the Baltic Sea and the North Sea. European studies of offshore wind document that atmospheric conditions there are predominantly neutral— meaning neither too windy nor too still, but somewhere in the middle, with unstable wind conditions occurring only 20 percent of the time. Cont'd...
Mark Lammey for EnergyVoice: A major bank’s decision to throw its weight behind a floating solar power scheme shows the sector is rich with commercial potential, bosses at engineering consultancy OST Energy said.
OST acted as technical adviser for Royal Bank of Scotland (RBS) during the early stages of the project to bring Europe’s largest floating photovoltaic solar project to financial close earlier this year.
The 6.3 Megawatt peak (MWp) array, installed by Lightsource Renewable Energy, is the first project of its kind to secure European bank financing.
It now provides a source of clean energy to water utilities company, Thames Water, on the Queen Elizabeth II reservoir west of London.
Thames Water will buy all energy generated by the project as part of a power purchase agreement (PPA) with Lightsource. Cont'd...
Samantha Page for ThinkProgress: The Nevada Supreme Court on Thursday rejected a solar industry-backed measure that would have let voters decide how customers are paid for the electricity they put back on the grid.
The November referendum would have allowed voters to overturn a Public Utilities Commission (PUC) decision from late last year that gutted the state’s net metering program — a rate design element that ensures solar owners are paid retail rate for the electricity they put back on the grid.
The court ruled that the description included in the referendum was “inaccurate,” “misleading,” and “argumentative,” the AP reported.
But the industry was not bowed after the ruling, saying it would continue to fight to set fair rates for solar homeowners. Cont'd...
Tereza Pultarova for Engineering & Technology Magazine: A flywheel-based device invented by a Lancaster University student could help solve the renewable energy storage problem, offering a better alternative to battery technology.
The Flywheel Energy Store, designed by 21-year-old Abigail Carson, retains energy kinetically in a levitating floating mass. The flywheel, about the size of a football, doesn’t require any additional control mechanisms, inputs or maintenance.
“The global energy crisis is the biggest and most urgent problem that needs addressing,” said Carson, who is awaiting a patent for the device. “The Flywheel Energy Store can be used for a vast range of applications – most significantly in providing energy security and independence for everyone globally, but also including eliminating waste in power networks, pumping water to villages and allowing for cleaner cooking and heating in developing countries, instant charging of electric vehicles, and off-grid energy storage.”
Carson’s flywheel can rotate at up to 144,000 revolutions per minute (rpm). The majority of existing flywheel designs usually achieve a maximum of around 60,000rpm. Cont'd...
ALEXANDRU MICU for ZME Science: The Ukranian government plans to turn Chernobyl, the site of the world’s most famous nuclear meltdown, into a sprawling solar power plant — the largest in the world.
Since the meltdown on April 26, 1986, no one’s been able to find any good uses for Chernobyl. A 1,600 square mile area was drenched in radiation and deemed an “exclusion zone,” so everyone was evacuated after the clean-up efforts were concluded and the plant was sealed in its ubiquitous sarcophagus. The buildings, goods, and infrastructure in the area were abandoned so fast that the city looks like time froze there 30 years ago — albeit with a Falloutesque look. Since we left, nature took over, and for the most part, is thriving in our absence (though the microbes that decompose dead organic matter seem to be having a hard time living here.)
In a recent interview, however, Ukraine’s ecology minister Ostap Semerak said that the government is negotiating with two US investment firms and four Canadian energy companies to develop Chernobyl’s solar potential. The area is uniquely suited for the purpose — the land is extremely cheap, much of the required infrastructure, such as roads are already built. Even better, the power lines that served the old 4GW reactor are still useable. Cont'd...
Chris Martin for Bloomberg Technology: Elon Musk’s Tesla Motors Inc. reached an agreement to buy SolarCity Corp. for $2.6 billion, about $300 million less than an initial proposal criticized as a “bailout” for the solar company in which he’s the largest shareholder.
SolarCity investors will receive $25.37 a share in stock under the agreement, according to a statement Monday. Musk initially offered $26.50 to $28.50 a share in Tesla stock. Analysts have said in the past that the bid was too low and investors have questioned the wisdom of Musk combining his electric-car maker with the clean-energy company. The deal, which allows SolarCity to solicit competing takeover offers through Sept. 14, will now go to the shareholders of the companies for approval. Cont'd...
Georgia Institute of Technology: New computer modeling suggests that high temperature TPV conversion -- which captures infrared radiation from very hot surfaces -- could one day rival combined-cycle turbine systems when combined with thermal storage using liquid metal at temperatures around 1,300 degrees Celsius. Advances in high-temperature components and improved system modeling, combined with the potential for conversion costs an order of magnitude lower than those of turbines, suggest that TPV could offer a pathway for efficiently storing and producing electrical power from solar thermal sources, a new study suggests.
The underlying technologies of high temperature storage and thermophotovoltaic conversion could also be used to produce grid-scale batteries able to rapidly supplement other power sources by storing heat for quick conversion to electricity. The research, supported by ARPA-E, was reported July 4 in the journal Energy and Environmental Science by researchers at the Georgia Institute of Technology. Cont'd...
Reuters: A team of scientists at a Belgian university say they have created a machine that turns urine into drinkable water and fertilizer using solar energy, a technique which could be applied in rural areas and developing countries.
While there are other options for treating waste water, the system applied at the University of Ghent uses a special membrane, is said to be energy-efficient and to be applicable in areas off the electricity grid.
"We're able to recover fertilizer and drinking water from urine using just a simple process and solar energy," said University of Ghent researcher Sebastiaan Derese.
The urine is collected in a big tank, heated in a solar-powered boiler before passing through the membrane where the water is recovered and nutrients such as potassium, nitrogen and phosphorus are separated. Cont'd...
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