This post originally appeared at Popular Mechanics. You can read the full post on their website. Written by Chris Ladd.

The 2000-pound cylinder of fiberglass, resin and carbon fiber, glossy as a vinyl record, hangs from a mechanical winch above its thick steel chamber. For millennia, flywheels have powered everything from potter’s wheels to steam engines, storing kinetic energy in their momentum as they spin. Now, the flywheel has found a higher purpose in the electrical grid: Wound around a 500-pound rotor, this 5-foot-tall, 3-foot-diameter flywheel assembly at Beacon Power’s plant in Tyngsboro, Mass., appears poised to be the great green hope of that unsung, unsexy, absolutely essential energy niche that is frequency regulation.

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The new report found that North Carolina has a lot of solar energy potential due to its “vast” solar energy intensity (which is nearly as much as Florida’s) combined with other economic, policy and technological factors.

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The articles of association for the DESERTEC Industrial Initiative (DII) were signed by the joint venture group of 12 companies and the DESERTEC Foundation in Munich on October 30.

Additionally, a CEO for DII was appointed — Paul van Son.

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Hawaii’s initiative will make it possible for homeowners and businesses to sell power they generate from small to medium-scale renewable energy projects (i.e. solar panels) to Hawaii’s main power producers at higher than market-value rates.

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It’s rare that you’ll encounter a home owner today who says that if they had the option, they wouldn’t want to reduce their carbon emissions or reduce their energy consumption, and in turn, the costs of home ownership. The problem is, that in many cases, greener home technology is just out of reach of many North Americans because of the high costs that are still associated with the options available on the market. This has been the case with voltage optimization technology that can accomplish the above goals, but until recently, it’s only been attainable to large organizations looking to optimize their energy use because of cost. A UK company has decided to address this lapse in the industry by introducing the VPhase, an affordable voltage optimization technology for home owners.

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The greening of Comfort Inn is thanks to a partnership with Pursol Solar Systems, which will install an 83 kilowatt photovoltaic system under its Solarize financing program, basically guaranteeing the hotel a 20% savings on its electricity bill without any up-front costs.

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This post is an excerpt of an article from Popular Mechanics. You can read the full post on their website. Written by Tyghe Trimble.

At the 8 ½-mile mark, Jim Campbell is at the head of the pack, in control of the race. The two-time defending champion has every reason to be confident—he knows the course inside and out, he owns the most time-tested vehicle and he still has a few tricks to pull out, including a parasail, which on this windy day could be a potent weapon. But when he grabs his remote control to adjust the speed, Campbell, his boat and its cargo—400 pounds of lead-acid batteries—suddenly stop.

“I think my nylon gear picked up static when rubbing against the plastic hull of the canoe and my electronics died,” he says. Campbell does the only thing he can—he whips out his emergency jumpers and charges 12 volts back into both of his motors. Then he adjusts his speed, dropping from about 4 knots (4.5 mph) to just less than 3 knots (3.3 mph). The race is no longer a sure win.

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A new report ranks ten leading world cities on their greenhouse gas emissions. It also examines how and why the emissions differ.

As the report says, over 50% of the world’s population lives in urban areas. Leading cities of the world, global cities, are the places where greenhouse gas emissions really need to be cut. The greenest city from the study is Barcelona and the worst is Denver.

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Dairy farm anaerobic lagoons without covers

The first large scale biogas plant linked to a beef feedlot, could make a more significant contribution to renewable energy in South Africa than the planned 3.8 MW of electricity, by advancing the technology in South Africa.

The Business

Independent power producer (IPP) Lesedi Biogas Project (LBP) is planning to build one of the world’s largest open-air feedlot manure-to-power plants, in Heidelberg, near Johannesburg, South Africa. Such plants use the anaerobic fermentation (bacterial fermentation of organic waste, with little or no oxygen present) to produce a methane rich gas which can be used to produce electricity or burn for heat.

The plant will be situated at the Karan Beef feedlot, which will supply the manure from its feedlot to the LBP. This would initially amount to 110,000 tons per year of manure, which would allow the production of 3,8 MW of base-load power reaching 6,2 MW of peak power.

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Solar power comes in many forms, from rigid to thin film. The panels are shiny, gleaming and ready to harness the power of the sun.

They’re also usually silver. Yet they also come in colors, not just for looks, but for efficiency.

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In a first, researchers at the University of Washington in Seattle have developed a completely tree-powered electrical circuit.

The nano-scale device—approximately 130 nanometers [a nanometer is one billionth of a meter] in size—consumes just 10 billionths of a watt (10 nanowatts).

Unlike the legendary science fair experiment in which a potato-based electric circuit is created using two electrodes (each electrode being a different metal, which react with the starch, causing a potential difference and thus a current), the UW device utilizes electrodes comprised of the same metal, and is able to generate (output) 1.1 volts. “As far as we know, this is the first peer-reviewed paper of someone powering something entirely by sticking electrodes into a tree,” according to paper co-author Babak Parviz, associate professor of electrical engineering at the UW.

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This post consists of a few lines and a link to what’s happened since some of my recent posts where there has been significant action. Each item is identified and linked by the date and title of the original post.

July 2009 - Sable Antelope - One Sold for $ 385 000 and Giant Species Rediscovered in Angola.

Three more Giant Sable Antelopes, have been sighted in Angola. This brings to six the number of this rare species, which was feared to have become extinct, that have been sited in the last few weeks.

July 2009 - Mauling of Baboon by “Fighting Dogs”, Reopens the Cape Peninsular Baboon Debate

Two men were attacked by Pit Bulls in Ocean View ,the same Township in Ocean View this week, prompting a warning from welfare group TEARS.

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According to the title of an article published in The City of Lancaster’s Outlook (Fall 2009) magazine “The Future Looks Bright for Solar Power in Lancaster”.

My small town,  all 475,000 of us, are at the forefront of solar energy! On August 5, 2009, eSolar unveiled the 5 MW (mega watt) demonstration plant known as Sierra SunTower. The solar power plant has 24,000 mirrors and two giant tower house boilers. The boilers create what’s known as “thermal solar” which is said to be more cost-effective than the standard photovoltaic approach used in solar cells. The process creates steam to drive the turbine generators. The project was completed in 14 month time frame and has already begun to distribute power to Southern California Edison.

eSolar’s site says “Sierra SunTower will supply 5 MW of clean, renewable energy to the grid. This full-scale power plant, the only one of its kind in the U.S., produces electricity for Southern California Edison (SCE) and will power up to 4,000 homes.”

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This column highlights the top economic stories of the week.

Having children is the surest way to send your carbon footprint soaring, according to a new study from statisticians at Oregon State University.

The study found that having a child has an impact that far outweighs that of other energy-saving behaviors. More on this story here.

A quarter-century ago, in the wake of America’s first energy crisis, a young scientist named Amory Lovins came to the Rocky Mountains and built himself a radical house based on a radical idea. The country could save both energy and money, he believed, by combining common sense and unconventional technology. More on this story here.

According to this week’s Economist, Britain will soon start to run out of electricity. How long will it be until its lights go out?  More on this story here.

A week ago a leading Indian daily published findings from a government report which assessed the feasibility of providing $17 billion in solar subsidies over the next 30 years. 

The report notes that India will be able to afford the complete expenses of the program which will make India one of the largest producers of solar energy, if not the largest. More on this story here.

The front pages in the UK this week are a-spread with the news of record profits at Barclays Bank, with accompanying bonuses for top bankers. This echoes last week’s story at Goldman Sachs. Given the recent bailouts and government support, the Economist is right to note that ‘such largesse looks cheeky at best’!

Although the two crises have little in common, this obstinate reminder of how little has changed in the financial sector prompts me to deeper pessimism in the environmental crisis. More on this story here.

One of the teams’ challenges in constructing a working sensor was that the device had to spend considerable time in “sleep mode” to conserve its limited power supply. This was problematic in that something was needed to “wake” the system up so it can do what it was intended to do. To solve this problem, the team invented a tiny clock mechanism to periodically wake the device up. The clock runs continuously on just 1 nanowatt of power, and, when fully turned on, uses just 350 millivolts (about one quarter the power of a AA battery).

Parviz points out that the nano-scale is not just a matter of size, but also one of power usage, and he anticipates more uses for such devices as a new generation of nano-electronics comes on-line.

The exact cause of this electrical tree power is not entirely understood but may involve the flow of dissolved mineral ions in the tree’s xylem–the specialized cells just inside of the tree’s cambium layer that transport water. And although too weak to ever replace solar power, tree-power can be used to monitor forest health, one tree at a time, and perhaps also monitor other signals from the environment (such as soil oxygen content, chemical signals from disease-causing pathogens, or heat increases that might indicate fire).

Additional co-authors of the paper include Eric Carlson and Ryan Ricchiuti, also of the UW. Research was funded in part by the National Science Foundation.

Photo Credit: University of Washington

Interestingly, while big wind can generate far cheaper power than big solar, small wind turns out to do quite the opposite.

A comparative turbine test performed over the last 12 months in Zeeland, Holland revealed that small wind turbines generate very little power for the money. The smaller the rotor, the less power. So I did some comparisons between small wind and solar. I found something surprising.

Small wind could cost 10 times the cost of residential solar to make the same power.

The energy yield was measured in an average wind speed of 8.5 mph over the year.
Here are the results, translated for the U.S. reader, with the comparative solar costs:

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When the sun goes down, some walkways in Birmingham, Michigan, start to glow.

They’re fitted with a phosphorescent glow-in-the-dark pavement marking system from Glow-Mark Technologies LLC of Royal Oak, MIchigan.

The system consists of encapsulated “pucks” fitted into brick pavers, wood or other material with a boring drill.

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Gills Onions is the largest fresh onion processing plant in the world. The company has more than 15,000 acres of farmland and 300,000 square feet of processing and warehousing facility. Gill was looking for ways to reduce his costs in his farming operation when he began to experiment using the juice from his onion crop in Oxnard, California to create the energy to run his lighting and refrigerators. The result was the creation of an Advanced Energy Recovery System (AERS).

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