Science Plant a Wind Tree in your neighborhood to generate energy from low-speed wind
Bruce Brown for Digital Trends: These trees do more than just add ambiance. Harnessing the wind to generate electrical energy usually brings to mind thoughts of huge land- or ocean-based wind farms consisting of huge towers with two or three blades, each more than 100-feet long, on the top. The size, weight, noise, and vibration of industrial wind turbines restrict their use to large open spaces. Newwind, a French startup, has developed a much smaller, urban-space-friendly “Wind Tree,” reports Electrek.
The Wind Tree, which produces sufficient energy to power small buildings or streetlights, is designed to connect to a nearby energy storage system. The trees are each about 30 feet tall and 26 feet in diameter, and weigh approximately 5,500 pounds. Each tree has 54 Aeroleafs mounted vertically on tree branches. The Aeroleafs are 3.2 feet high and, spinning at optimum speed, are capable of generating 65 watts each. So, a tree with 54 leaves has an energy-generation capacity maximum of 3,510 watts (3.5kW), about the same as a small home solar installation. Cont'd...
How Flushing your Toilet could help create Biofuel
Laura A. Shepard for Popular Science:  Picture a giant toilet bowl looming larger than life outside the UN headquarters in New York. It sounds like an absurd scene, but the stunt from three years ago was not a childish prank. It was a serious statement to mark the first World Toilet Day and raise awareness of the fact that one third of the worlds population lacks access to toilets.
Addressing the global sanitation crisis is a top priority among the UNs Sustainable Development Goals, and it now has an exciting solution.
In fact, science may soon make your toilet bowl a viable alternative energy source. Your flushes can produce two or three gallons of biofuel per year when the wastewater is treated using a process, developed scientists and engineers at the Department of Energys Pacific Northwest National Laboratory, called hydro-thermal liquefaction (HTL).
HTL emulates the way crude oil forms naturally, when biomass decays under high pressure and heat for millions of years - but it only takes 45 minutes.  Cont'd...
The First Tidal Generator in North America Is Now Online
Avery Thompson for Popular Mechanics: The first tidal generator in North America has gone online this month in the Bay of Fundy, and is expected to generate enough electricity to power 500 homes.
While most hydro generators harness the energy of falling water, or the energy of the waves, tidal power uses the energy of the high and low tides. At the Bay of Fundy in Nova Scotia, which has the largest tides in the world, that energy is being harnessed to generate 2 megawatts of electrical power.
In the Bay of Fundy, the difference between high and low tide is about 56 feet. Approximately 115 billion tons of water flow in and out of the bay every tidal period. Two renewable energy developers, OpenHydro and Emera, decided to build turbines on the seafloor that could harness that power. Cont'd...
A Danish Wind Turbine Maker Harnesses Data in a Push to Stay Ahead
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...
Obama makes new push on solar power
Timothy Cama for The Hill: The Obama administration is making a new large-scale effort to encourage deployment and use of rooftop solar power on homes.
Numerous agencies announced new or strengthened coordinated efforts Tuesday aimed at increasing solar installations in houses owned by low- and moderate-income Americans, including a new goal for solar installations and a policy change to increase access to a key financing mechanism for solar power and energy efficiency.
“This is an approach that cuts across the government to try to take advantage of the fact that the cost of renewable technologies has come down dramatically during President Obama’s tenure, and we want to advantage of that a try to encourage more homeowners to actually benefit directly from that dynamic,” Brian Deese, a top adviser to Obama, told reporters.
The administration is dubbing the effort the “Clean Energy for All Americans Initiative.” Cont'd...
Scripps Vessel Proves Viability of Renewable Fuel on 14,400-Mile Voyage
Chris Jennewein for Times of San Diego: A Scripps Institution of Oceanography research vessel has demonstrated the viability of renewable fuel by traveling 14,400 nautical miles over a 16-month period on renewable diesel.
The R/V Robert Gordon Sproul used a hydrogenation-derived renewable fuel called NEXBTL Renewable Diesel developed by Neste Oil in Finland. The experiment began in September 2014 and ran through December 2015, during which time the vessel used a total of 52,500 gallons.
“Part of the Scripps mission is to protect the environment, and one of the most significant changes that we could make in our ship operations involved moving toward the use of cleaner, renewable fuels,” said Scripps Associate Director Bruce Appelgate. “As scientists, we know we need to develop sustainable means of powering our ships to address pollution concerns as well as to mitigate future increases in fossil fuel costs.”
Renewable biofuel is nearly carbon-neutral and produces cleaner emissions, thus decreasing greenhouse gas emissions and improving air quality relative to fuels derived from petroleum. Cont'd...
SolarCity pushing industry to 40% increase in useful lifetime of solar power installations
John Fitzgerald Weaver for Electrek: In a new report released by SolarCity, we are seeing that solar power systems have a usable lifetime of at least 35 years – 40% longer than the market expects. The key finding of the report is that power degradation (annual efficiency loss) of solar panels supplied to SolarCity is as much as 35% lower than for a comparable industry-wide selection of non-SolarCity panels, which are typically expected to last for 25 years. SolarCity feels it is the implementation of a stringent and industry-leading “Total Quality Program” that has driven this.
SolarCity is in the unique position of being one of the largest deployers of solar panels – from multiple manufacturers – in the world, and with their tens of thousands of systems connected to a central database they know realtime performance. In the study here, SolarCity looked at greater than 11,000 panels to determine their data points and come to their conclusion that their solar panels are performing well beyond expected industry standards. Cont'd.. .
IKEA of energy delivers clean, green solar power-plant in a box
Richard Kemeny for New Scientist: Here’s a bright idea for flat-packing. A German start-up has figured out how to cram an entire solar power plant into a shipping container. It has sent its first kits to off-grid villages in Africa, where they provide a new source of clean, affordable electricity after just two hours of assembly.
More than 620 million people in sub-Saharan Africa have no access to electricity, a situation that can keep people in poverty. And population growth means this number is rising. Those with access tend to rely on inefficient diesel generators, chugging along with crippling financial and environmental costs.
Despite that, diesel is standard for off-grid energy. “If there’s no diesel, there’s no electricity”, says Rolf Kersten of the start-up, Africa GreenTec in Hainburg, Germany, which shipped its first solar generator to Mali in December last year. Cont'd...
Siemens, Gamesa merge to create wind power giant
From DW.com: Spanish renewable energy group Gamesa has agreed combine its wind power business with those of Germany's Siemens in a deal that will create one of the world's largest makers of wind turbines.
In a note to the Spanish stock market regulator on Friday, Gamesa said it had reached the necessary "corporate approval for the potential integration of Siemens' wind business," with the final terms of the deal still needing to be agreed upon. The announcement followed months of negotiations between the two companies and it comes as demand for wind power surges as countries develop more renewable energy to comply with emissions cut targets. Although no price tag has so far been put to the merger, financial news agency Bloomberg reported that Siemens would pay around one billion dollars (890 million euros) to Gamesa as part of the operation. The German engineering group would hold a majority stake of 59 percent of the new wind venture, Bloomberg said, citing people familiar with the matter. Gamesa's biggest shareholder, Spain's biggest power company Iberdrola, would have a 20 percent stake in the new firm, according to Spanish media reports. Cont'd...
Saving the Earth by Making Energy Industry's Boardrooms Diverse
Ainslie Chandler for Bloomberg: The U.S. energy sector accounts for 83.6 percent of the country’s carbon emissions, according to the Environmental Protection Agency, so tackling climate change effectively requires their participation. Some experts worry the lack of diversity in their leadership is hindering that shift.
Energy-sector boards are the least diverse of any industry globally, with 8.2 percent of seats occupied by women, compared with an average of 10.5 percent for all businesses, according to data compiled by Bloomberg. That translates to an average of just 0.7 women on the board of each of the 650 energy companies in Bloomberg’s review.
More than 170 countries signed the Paris Agreement in April, which aims to limit the global temperature increase to below two degrees Celsius. If this target is going to be met and the transition to a “de-carbonized” economy made, companies will need to fundamentally change, so leadership teams also have to change, said Rachel Kyte, chief executive and special representative of the UN Secretary-General at Sustainable Energy for All.
“It’s like this bus is coming toward us,” Kyte said of climate change and the transition to renewable energy. “If you keep asking the same people and they keep coming up with the same answer, we’re not going to manage this transition very well.” Cont'd...
Australia's Carnegie Wave Energy Project Sets World Record
Joshua S Hill for CleanTechnica: Australia’s Carnegie Wave Energy Project has set a new world record after completing 14,000 cumulative operating hours, the highest ever recorded.
The news was announced by the Australian Renewable Energy Agency (ARENA) this week, which provided $13.1 million in funding. The $40 million project uses CETO wave energy technology, and was the world’s first array of wave power generators to be connected to an electricity grid. For the past 12 months, the CETO 5 project has used an array of three offshore wave power generators to provide electricity and potable desalinated water to Australia’s largest naval base, HMAS Stirling, on Garden Island in Western Australia.
“ARENA is proud to help local companies, like [Carnegie Wave Energy Limited], develop new renewable energy solutions that have the potential to change the way the world generates electricity,” said ARENA CEO Ivor Frischknecht. “We do this by providing Australian innovators with the support they need during the critical RD&D period, when patient funding is essential.” Cont'd...
American wind power sets sights on doubling in five years
From WINDPOWER 2016 - By continuing to advance technology and lower costs, wind power, America's fastest growing new source of electricity, will stay on pace to grow to supply 10 percent of U.S. electricity by 2020. That's according to leading wind energy executives this morning during the American Wind Energy Association's WINDPOWER 2016 Conference and Exhibition, as thousands of attendees continued to file into the Western Hemisphere's largest wind energy industry event all year.
Helping to grow wind energy in the U.S. are a mix of stable federal policy, passed late last year on a bipartisan vote by Congress, forward-looking states raising their renewable energy targets, and corporate and other non-utility buyers aiming to cut carbon pollution and pass savings onto American homeowners and businesses. Full Press Release.
High legal barriers in 10 states make it especially difficult to put solar panels on rooftops.
Julian Spector for CityLab: A lot has been said already about the success of the states that are leading the adoption of solar energy. There’s plenty to celebrate, as solar installationssmash records and as the industry grows 12 times faster than the U.S. economy. At the same time, it’s important to recognize that many people live in places where the government is either not facilitating a solar market or is actively smothering it.
Solar obstructionism takes center stage in a report, aptly titled “Throwing Shade,” out Tuesday from Greer Ryan at the Center for Biological Diversity. The organization advocates for an energy system that’s clean, equitable, and wildlife friendly, so Ryan set out to rank the states based on how well their policies encourage rooftop solar panels. Then she analyzed the 10 worst-scoring states with the highest solar potential in order to better understand how the absence of state-level policies—or the presence of antagonistic ones—hampers the growth of solar markets. Cont'd...
This Device Could Provide a Third of America's Power
Sam Grobart for Bloomberg: There are 332,519,000 cubic miles of water on the planet. That's 352,670,000,000,000,000,000 gallons just sloshing around out there.
Anyone who's ridden or been tossed by a wave has a sense of the kinetic energy contained in our perpetually moving oceans. If we could harness it, it could provide a clean, renewable source of energy. But efforts to turn our oceans into power generators—often in the form of "aqua-mills," windmill technology adapted to water—have foundered on the complexity of their many moving parts in the corrosive and remote environs of the sea.
A new approach, developed by a company called Oscilla Power, applies all that kinetic energy to a solid piece of metal instead of using it to turn the blades of an impeller. That creates an alternating magnetic polarity in the metal that can be converted into electrical current.
Oscilla's technology, which is nearly solid-state, may prove far more durable than any other ocean-power project, increasing the chance to draw power from our oceans cleanly, meaningfully, and endlessly. View video here:
Danish researchers may have found 'the energy source of the future'
CPH Post: Researchers at the University of Copenhagen have discovered a natural process they are calling ‘reverse photosynthesis’. They have observed how the energy in solar rays breaks down rather than builds up plant material, as happens in photosynthesis.
Sunlight is collected by chlorophyll, and when combined with a specific enzyme the energy breaks down plant biomass. The resulting product can then be used as a biofuel.
By increasing production speed while reducing pollution, the discovery has the potential to revolutionise industrial production.
“This is a game-changer, one that could transform the industrial production of fuels and chemicals, thus serving to reduce pollution significantly,” said Claus Felby, the University of Copenhagen professor who headed up the research.
“It has always been right under our noses,” he said. “Photosynthesis by way of the sun doesn’t just allow things to grow – the same principles can be applied to break plant matter down, so that the immense energy in solar light can be used so that processes can take place without additional energy inputs.” Cont'd...
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