In a breakthrough, scientists have developed a new low cost, efficient and environment-friendly solar cell that uses tin instead of the hazardous lead. Researchers from Northwestern University are among the first to create a solar cell that uses a structure called perovskite, with tin as the light-absorbing material instead of lead. "Exculding the use of lead is a quantum leap in the process of creating a very promising type of solar cell called a perovskite," said Mercouri G Kanatzidis, an inorganic chemist with expertise in dealing with tin. "Tin is a very viable material, and we have shown that it works as an efficient solar cell," said Kanatzidis. Lead perovskite has achieved 15 per cent efficiency and tin perovskite should be able to match - and possibly surpass - this level of efficiency, researchers said. Perovskite solar cells are being touted as the "next big thing in photovoltaics" and have reenergised the field.
Finance experts expect more initial public offerings (IPO) in the wind energy sector in 2014 after a year in which half a dozen companies on both sides of the Atlantic successfully raised nearly $2.3 billion by tapping the public equity markets. "It is hard to really predict how many will come out of the gate and actually get done. But there are 10-20 companies out there working on it, wondering if this is good source of low-cost capital for them and if they have what it takes to make a placement like this," says Michael Eckhart, global head of environmental finance with Citigroup. British fund Greencoat UK Wind started a wave of IPOs in March 2013, raising £260 million ($433 million). NRG Yield in the US and the Renewables Infrastructure Group (TRIG) in the UK followed in July with offerings of $431 million and £300 million, respectively. Canada's TransAlta Renewables completed a C$221 million (US$200 million) share sale in August, California-based Pattern Energy raised $352 million in October, and the UK's Infinis rounded up the year with a £234 million share sale in November.
Solar Energy - NRG Energy and MidAmerican Solar Complete Agua Caliente, the World's Largest Fully-Operational Solar Photovoltaic Facility
NRG Energy, Inc. (NYSE:NRG), through its wholly-owned subsidiary NRG Solar, along with partner MidAmerican Solar announced they have achieved substantial completion at their Agua Caliente Solar Photovoltaic Facility, a 290 megawatt (MW) photovoltaic facility located on 2,400 acres of land between Yuma and Phoenix, Ariz. The electricity that is generated by the station, which can support 230,000 homes at peak capacity, is being sold to Pacific Gas & Electric Company (PG&E) under a 25-year power purchase agreement. “Large-scale utility accomplishments, like our Agua Caliente project, raise the bar in terms of our clean-energy technology and production,” said Tom Doyle, president, NRG Solar. “Proving that we can build both the world’s largest solar thermal and now one of the world’s largest solar photovoltaic facilities advance NRG’s mission to reshape the energy landscape that is incredibly beneficial to both the economy and in how we produce and consume energy. Whether it’s partnering, developing or investing, NRG will lead the way in providing a diverse set of solutions and technologies to get the US to the ultimate goal of providing affordable, reliable clean energy for everyone.”
Scientists from the Japan Aerospace Exploration Agency (JAXA) have planned a series of pilot projects which, if successful, should culminate in a 1-gigawatt space-based solar power generator within just 25 years. Its energy output would be on par with some of the largest modern conventional power plants, thanks to fact that it’s above the atmosphere, which reflects or absorbs most solar energy that falls on Earth. Collecting solar power above the atmosphere means you could have access to almost 150% of surface amounts — and if we can find a way of beaming that power back down to Earth, our reliance on every other form of energy would vanish overnight. Here at ExtremeTech, we publish a fair number of articles about improvements to solar power. That makes sense since, until fusion power comes of age, solar will remain the only green technology that could even theoretically provide for our global power demands. The sun blasts our planet with so much power that the world’s deserts absorb more energy in a single day than the human race uses in a year. Yes, Earth’s surface is a phenomenal place to collect solar energy — but astronomers know about somewhere even better. Full Article:
Driven by an explosion in photovoltaics, the U.S. solar sector has emerged "from a relatively small contributor to the nation's total electric capacity into a one of comparative significance," the Energy Information Administration reported this week in its latest Electricity Monthly Update. Since 2010, EIA said, U.S. solar capacity increased 418 percent from 2,326 megawatts, accounting for 0.2 percent of total U.S. electric generation, to today's 12,057 MW, or 1.13 percent of U.S. generation. More than half of that additional capacity — 5,251 MW -- has been installed by home and business owners participating in utility net metering programs that allow owners of solar systems to sell excess capacity back to their local utility at retail rates, according to EIA. California has the largest net metered solar capacity, with 38 percent of the U.S. total, but Eastern states such as Massachusetts and New Jersey also have significant amounts of net metered solar energy, the agency said. Utility-scale PV applications, defined as systems with 1 MW or more of capacity, have also expanded significantly and currently account for 5,564 MW, according to EIA. Such systems generally are designed to generate power for wholesale markets.
Technological and market forces have converged to make energy storage one of the most exciting — and potentially game-changing — opportunities for commercial and industrial facility managers, grid operators, homeowners and investors. Forward-thinking utilities, battery suppliers, power inverter producers, system integrators and public-sector supporters are driving a massive expansion of energy storage solutions aimed at enabling the grid of the future — or even a grid-less future. Although the energy storage value chain includes hundreds — if not thousands — of players, the following are leading the charge. Full Article: Here are 11 innovative companies giving energy storage a jolt: 1. Aquion Energy: A cleaner chemistry 2. General Electric: A storage giant awakens 3. Green Charge Networks: Power efficiency 4. LG Chem: Leading lithium-ion battery maker 5. NEC Corporation: Global grid-scale storage 6. NRG Energy: From V2G to 'post-grid future' 7. Princeton Power: Grid-tied storage 8. Solar Grid Storage: A match made in the heavens 9 and 10. SolarCity and Tesla: A dynamic duo 11. Sonnenbatterie: From Europe with love
President Obama will challenge companies Thursday to expand their use of solar power, part of his ongoing effort to leverage the power of his office to achieve goals that have been stymied by Congress. The new initiative comes as the White House is hosting a Solar Summit aimed at highlighting successful efforts on the local level to speed the deployment of solar energy. Although some large solar plants are coming online and it is the fastest-growing source of renewable energy in the United States, according to the U.S. Energy Information Administration, it accounts for roughly 1 percent of the nation’s electricity generation. “Now is the time for solar,” said Anya Schoolman, executive director of the Community Power Network, a Washington-based nonprofit group that helps communities build renewable energy projects. She will be honored at the summit Thursday. “The costs are affordable, in reach of middle America and above. We know how to do it now, we know how to scale it, and we kind of just need people to let it go and encourage it,” she said. In an effort to make it easier for state, local and tribal governments to expand their solar portfolios, the Energy Department is launching a $15 million-dollar “Solar Market Pathways” program.
Asia is now leagues ahead of other regions within the global wind market. Furthermore, this market is expected to grow at an annual cumulative capacity rate of more than 10 percent over the coming five years. A recent Global Wind Energy Council (GWEC) report shows other significant wind energy markets of the past few years have slowed in comparison. However, overall global growth of wind energy will remain firm with a hopeful measure of expanding growth again. The wind market for 2013 was an “off” year. Less wind energy capacity was installed in 2013 than in 2012. This disappointment saw the biggest drop in the market’s relatively short life. From 1996 through 2013, annual installed capacity for wind grew at an average rate of more than 20 percent.
A team of researchers at the Massachusetts Institute of Technology and Harvard University are working on a technology that wouldn't require sunlight to produce solar power. The team is developing a material that can absorb the sun's heat and store the energy in a chemical form, ready to be released "on-demand," according to a release. The technology could be used for heating buildings, cooking or other uses where heat, rather than electricity, is the desired output. In a release, researchers describe the technology behind the system: "Some molecules, known as photoswitches, can assume either of two different shapes, as if they had a hinge in the middle. Exposing them to sunlight causes them to absorb energy and jump from one configuration to the other, which is then stable for long periods of time.
The price of Chinese-made solar panels delivered to the U.S. could increase by up to 20% by the end of the year, GTM Research said Thursday. The increase is due to supply constraints, rising input costs, and the ongoing trade dispute between the two countries, the Boston-based green-energy consultancy said in a report. Chinese-made modules are significantly cheaper than those made in other areas, and GTM Research estimated they were 55% of total modules shipped to the U.S. last year. Chinese firms are quoting modules at 80 cents to 85 cents per watt for delivery in the second half of the year, compared to 70 cents per watt at the end of 2013, the report said. The ongoing U.S.-China trade case is the "primary driver" behind the price increase, the report said. More duties on Chinese and Taiwanese solar modules would push up U.S. pricing beyond current levels, as the firms would pass on tariff-induced penalties onto customers or contract out cell and module production to vendors based in higher-cost countries such as India, South Korea, and Malaysia, GTM Research said.
Sixty years ago on April 25, 1954, Bell Laboratories demonstrated to the world one of the most significant breakthroughs ever recorded in the history of solar energy and of electricity – the first solar cell capable of converting enough sunlight into electricity to generate useful amounts of power. The press watched in awe as light poured on the first watt of silicon to run a 21 inch Ferris wheel. The next day the New York Times stated on its front page that the Bell invention marked “the beginning of a new era, eventually leading to the realization of one of mankind’s most cherished dreams – the harnessing of the almost limitless energy of the sun for the uses of civilization.” At the time of the Bell announcement, all the solar cells in the world delivered about one watt. Today, more than 100 billion watts of generating capacity of photovoltaics have been installed worldwide. This year not only marks the 60th anniversary of the solar cell, but also the beginning of reaching the Holy Grail that had previously been only a dream of solar scientists – entering the Era of Grid Parity, when solar panels generate power at costs equal to or less than electricity produced by fossil and nuclear fuels. With the phenomenal growth of solar technology in the last several years and its future looking even brighter, the time is ripe to celebrate the founding of a technology that led Science magazine almost forty years ago to declare, “If there is a dream solar technology, it is photovoltaics solar cells … a spaceage electronic marvel at once the most sophisticated solar technology and the simplest, most environmentally benign source of electricity yet conceived."
The $14 billion industry, the world’s second-largest buyer of wind turbines, is reeling from a double blow -- cheap natural gas unleashed by the hydraulic fracturing revolution and the death last year of federal subsidies that made wind the most competitive of all renewable energy sources in the U.S. Without restoration of subsidies, worth $23 per megawatt hour to turbine owners, the industry may not recover, and the U.S. may lose ground in its race to reduce dependence on the fossil fuels driving global warming, say wind-power advocates. They place the subsidy argument in the context of fairness, pointing out that wind’s chief fossil-fuel rival, the gas industry, is aided by the ability to form master limited partnerships that allow pipeline operators to avoid paying income tax. This helps drive down the cost of natural gas. “If gas prices weren’t so cheap, then wind might be able to compete on its own,” said South Dakota’s Republican Governor Dennis Daugaard. Consider that gas averaged $8.90 a million British thermal units in 2008 and plunged to $3.73 last year, making the fuel a cheaper source of electricity for utilities. Congress allowed the wind Production Tax Credit to expire last year, and wind farm construction plunged 92 percent.
New solar photovoltaic (PV) demand added during the first quarter of 2014 exceeded 9 gigawatts (GW), which was 35 percent more than the previous first-quarter record, set last year. In fact, every quarter in 2014 is forecast to reach new highs, with trailing 12-month demand at the end of Q1 2015 forecast to exceed 50 GW for the first time, according to findings in the latest NPD Solarbuzz Quarterly report. The record level of demand achieved in the first quarter was driven by strong growth in Japan and the United Kingdom. These two countries combined accounted for more than one-third of global solar PV demand in Q1 2014 and set new quarterly records for PV deployed.
The world's largest solar plants sure look amazing, but for those with inquisitive minds they raise one big question: how the hell do they keep all those panels clean? Nowadays, using robots like this! This video shows the newly installed robotic cleaning system at Ketura Sun Solar Park. Until now, the panels covering the 20-acre site were only cleaned about nine times a year—a laborious task, performed infrequently due to expense—which in turn led to sub-optimal plant efficiency. Now, though, a robotic army—designed and made by Israel-based Ecoppia—swarm over the panels to keep them clean. The 100 centrally controlled automatons set to work at nighttime, using microfiber pads and controlled air flows to push dirt from the surface of the solar panels. The robots move up and down their own aluminum frames to avoid loading the panels, and during the day they sit at the bottom and charge using electricity generated by the plant. So, now you know.
On Wednesday, March 27th, the largest state in the contiguous United States got almost one-third of its electricity by harnessing the wind. According to the Electric Reliability Council of Texas, which manages the bulk of the Lone Star State's power grid, a record-breaking 10,296 MW of electricity was whipped up by wind turbines. That's enough to provide 29 percent of the state's power, and to keep the lights on in over 5 million homes. ERCOT notes in a statement issued today that "The new record beats the previous record set earlier this month by more than 600 MW, and the American Wind Energy Association reports it was a record for any US power system."
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