Largest Solar Array in Southeast

Orange County Convention Center's new one-megawatt photovoltaic (PV) system, the largest rooftop solar installation in the Southeast. Solar panels will span the length of five and a half football fields, generating 1,300 megawatt-hours of electricity per year - greatly reducing the center's carbon footprint and electricity costs. The unveiling will kick off the Green Cities Florida Conference, a two-day event providing fresh, innovative and useful information to businesses, communities and governments interested in embarking on the road to sustainability or improving their current efforts.


Scotland's Whitelee windfarm has a capacity of 322MW, enough to power 180,000 homes, or a city the size of Glasgow. The opening celebration was enhanced by the news of the Scottish Government's approval for an extension, which will raise the windfarm's power capacity to 452MW and create 300 much-needed green jobs in construction. Whitelee takes the current level of wind operating up to 3.5GW. A further 9.2GW is either under construction or about to start construction, but 8.6GW, of which 7.1GW is onshore, is still awaiting planning permission. In England and Wales the majority of this is onshore at Local Government level, where planning decisions can take up to two years to be made, and the approval rate is only 40%.

Semiconductors Save Money and Energy --- Big Time

Semiconductor technologies, present in many modern day devices and systems, are so essential to advances in energy efficiency gains that the United States economy could expand by more than 70 percent through 2030 and still use 11 percent less electricity than it did in 2008, according to a new study by the American Council for an Energy-Efficient Economy (ACEEE). The report estimates the cumulative net electricity bill savings enabled by semiconductors might exceed $1.2 trillion through 2030. With smart investments productivity gains could reduce electricity use to only 3,364 billion kWh by 2030. The resulting savings of 1,242 billion kWh means that the economy may actually consume 11 percent less electricity in 2030 than it did in 2008. Original article.

Gravel Stores Energy for the Grid

A group of English engineers have built an advanced heat pump and connected it to an energy storage system using two silos full of plain old gravel that they say is as cheap as pumped hydro, as location-agnostic as a battery - and is super efficient. Using the heat pump as the key, the team built an energy storage system that compresses argon gas to produce a temperature differential and deposits heat and cold into two separate large silos of gravel. Energy is stored in the gravel and when the process is reversed, it can be released.

PG&E Brightsource deal breaks solar contract record

The contracts secure 1,310 megawatts of solar thermal power from seven projects, the first of which - a 110MW installation in Ivanpah, California - is slated to be online by 2012. Construction is set to begin in "about six months, following approval from the California Energy Commission and the Bureau of Land Management," says BrightSource chief executive John Woolard in an interview published on PG&E's Web site.

GE to Invest $100M+ in New York Battery Plant

General Electric has announced that it plans to build a new battery factory in upstate New York with an "initial investment" of $100 million and additional funds requested under the stimulus package. First up for the New York plant, if all of the financing comes through: batteries for hybrid freight trains. It's looking at providing energy storage devices for other applications including utilities, telecoms and load leveling for the smart grid. At full capacity, the new plant is designed to produce 10 million battery cells, or about 900 MW-hours of energy storage per year.

Clayton i-House - $93,300

"This innovative 'green' home, featuring solar panels and numerous other energy-saving products, is truly a home of the future," Warren Buffett wrote his shareholders. "Estimated costs for electricity and heating total only about $1 per day when the home is sited in an area like Omaha." The "i-house's" metal v-shaped roof - inspired by a gas-station awning - combines design with function. The roof provides a rain water catchment system for recycling, supports flush-mounted solar panels and vaults interior ceilings at each end to 10 1/2 feet for an added feeling of openness. The Energy Star-rated design features heavy insulation, six-inch thick exterior walls, cement board and corrugated metal siding, energy efficient appliances, a tankless water heater, dual-flush toilets and lots of "low-e" glazed windows.

IEEE launches smart grid interoperability standards project

Leveraging the technical breadth of the IEEE and its open standards development process, IEEE P2030 will provide a knowledge base for understanding and defining smart grid interoperability of the electric power system with end use applications and loads. It will involve the integration of energy technology and information and communications technologies, which is necessary to achieve seamless operation for electric generation, delivery, and end-use benefits that will permit two-way power flow with communication and control.

Heat2power uses exhaust gases to increase fuel mileage

French start-up Heat2power claim to have a new technology that increases fuel mileage using heat energy otherwise dissipated via the exhaust pipe. There are others that use a similar system, but the company claims that their device captures even more energy. The basics include installing an additional cylinder linked to the crankshaft with a clutch that is powered by exhaust heat. The exhaust gases circulate inside a heat exchanger linked to a closed-circuit filled with compressed air. Hot air enters the additional cylinder. Once it has moved the piston, the air goes to an intercooler and returns to the heating unit forming a closed circuit. The system is compatible with any ICE engine, the company claims. Their numbers also say the device reduces fuel consumption up to 20 percent in urban driving and 35 percent on the highway. Autobloggreen original article here.


Leviathan Energy has completed initial testing on their Wind Energizer unit and is reporting gains in wind turbine output in the ballpark of 30% - and as much as 150% at lower wind speeds. The idea is that by placing site-specific structures at the bases of the turbines you can shape the flow of air in the vicinity of the turbine so that the highest velocities get targeted at the blades. Leviathan's early testing has been conducted on a relatively small scale, using commercially-available small turbines with 3-meter blades but they are planning on exploring opportunities for third-party testing and certification on a commercial scale wind farm. Cleantech's original post.

A Day in the Life of a Solar Installer has an article from an experienced solar installer giving some personal accounts of what to expect when you get into the field and a bunch of insight into how their business is run. Its a good read for anyone thinking about getting into solar installation.

Mobile Solar System Powers Outdoor Concert

Sound Gardening is an upcoming concert taking place in Tokyo's scenic Kiyosumi Gardens. The small concert will showcase speaker design firm Taguchi Craft's new portable solar system designed for powering outdoor PA systems and intimate concerts. The system, designed for use indoors and outdoors, includes a moderately-sized solar panel and a charge controller. Framed in environmentally friendly wood paneling, the entire set-up costs just 37,800 yen ($385) to rent and 714,000 yen ($7,270) to buy here and folds up for convenient carrying.

Ten Green Cities Of The Future

Technology site Dvice is featuring a run down of their top ten concept cities from design visionaries worldwide, each encompassing innovative and sustainable construction techniques, green energy technology, and creativity.

San Jose street lights get smarter

Fortune Online has an article about how San Jose hopes to reduce the $3.5 million spent annually to light it's streets by replacing sodium lights with low-energy LED and by monitoring the whole system through a smart network. The 125-light test, due to launch this summer, will be implemented by hometown smart-grid company Echelon (ELON). The streetlight network will function in a similar way to a smart electricity grid. Using the city's wi-fi network, Echelon's networking technology enables the lights to transfer real-time data about the status and performance of any given bulb. That way, maintenance crews won't have to search for a fried bulb. The city will be able to monitor energy consumption, anticipate outages and dim lights to save energy at the flip of a master switch. Complete article.

Cold Fusion - Hot Topic Again?

A funny thing happened on the way to oblivion - for many scientists today, cold fusion is hot again. "We can yield the power of nuclear physics on a tabletop. The potential is unlimited. That is the most powerful energy source known to man," researcher Michael McKubre told 60 Minutes correspondent Scott Pelley. McKubre is an electro-chemist who imagines, in 20 years, the creation of a clean nuclear battery. "For example, a laptop would come pre-charged with all of the energy that you would ever intend to use. Watch the entire 60 Minutes story here.

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