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– Excellent post over on The Sietch Blog replete with great maps showing the abundance of the difference types of renewable energy across the U.S.    Highly recommended.

Click here to see the article:  ➡

Jonathan G. Dorn

After emerging in 2006 from 15 years of hibernation, the solar thermal power industry experienced a surge in 2007, with 100 megawatts of new capacity coming online worldwide. During the 1990s, cheap fossil fuels, combined with a loss of state and federal incentives, put a damper on solar thermal power development. However, recent increases in energy prices, escalating concerns about global climate change, and fresh economic incentives are renewing interest in this technology.

Considering that the energy in sunlight reaching the earth in just 70 minutes is equivalent to annual global energy consumption, the potential for solar power is virtually unlimited. With concentrating solar thermal power (CSP) capacity expected to double every 16 months over the next five years, worldwide installed CSP capacity will reach 6,400 megawatts in 2012—14 times the current capacity. (See data.)

Unlike solar photovoltaics (PVs), which use semiconductors to convert sunlight directly into electricity, CSP plants generate electricity using heat. Much like a magnifying glass, reflectors focus sunlight onto a fluid-filled vessel. The heat absorbed by the fluid is used to generate steam that drives a turbine to produce electricity. Power generation after sunset is possible by storing excess heat in large, insulated tanks filled with molten salt. Since CSP plants require high levels of direct solar radiation to operate efficiently, deserts make ideal locations.

Two big advantages of CSP over conventional power plants are that the electricity generation is clean and carbon-free and, since the sun is the energy source, there are no fuel costs. Energy storage in the form of heat is also significantly cheaper than battery storage of electricity, providing CSP with an economical means to overcome intermittency and deliver dispatchable power.

The United States and Spain are leading the world in the development of solar thermal power, with a combined total of over 5,600 megawatts of new capacity expected to come online by 2012. Representing over 90 percent of the projected new capacity by 2012, the output from these plants would be enough to meet the electrical needs of more than 1.7 million homes.

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– I like stories like this. They are great examples of what human beings can do. And there are many such stories around, if one looks.

– But, I fear stories like this as well – least they lead us into a false sense that ‘things are coming together‘.

– What matters in the end, is how things are on balance. And for every inspiring story, for every person working for a better world, there are a thousand who don’t care or who are in denial that there is a problem. And that’s the real problem that we need to steel ourselves to look at squarely.

– If you live in a community like the one in this story, if you work for an environmental group and spend your days with folks that live and breath this stuff, or if you live in a community that’s usually on the cutting edge, like Eugene Oregon, then it is easy to be seduced by what’s going on around you and think it represents the whole.

– But just step back and ask yourself what you would see, what you would find, if you simply reached down into the Earth’s population and took any random sample of 1000 people and looked to see how they feel and what they are doing – on balance. That’s where the rubber hits the road.

– This thing that’s happening, which will affect us all, has so far only concerned a few of us deeply and the rest are still living in a dream.

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A Danish community’s victory over carbon emissions.

Jørgen Tranberg is a farmer who lives on the Danish island of Samsø. He is a beefy man with a mop of brown hair and an unpredictable sense of humor. When I arrived at his house, one gray morning this spring, he was sitting in his kitchen, smoking a cigarette and watching grainy images on a black-and-white TV. The images turned out to be closed-circuit shots from his barn. One of his cows, he told me, was about to give birth, and he was keeping an eye on her. We talked for a few minutes, and then, laughing, he asked me if I wanted to climb his wind turbine. I was pretty sure I didn’t, but I said yes anyway.

We got into Tranberg’s car and bounced along a rutted dirt road. The turbine loomed up in front of us. When we reached it, Tranberg stubbed out his cigarette and opened a small door in the base of the tower. Inside were eight ladders, each about twenty feet tall, attached one above the other. We started up, and were soon huffing. Above the last ladder, there was a trapdoor, which led to a sort of engine room. We scrambled into it, at which point we were standing on top of the generator. Tranberg pressed a button, and the roof slid open to reveal the gray sky and a patchwork of green and brown fields stretching toward the sea. He pressed another button. The rotors, which he had switched off during our climb, started to turn, at first sluggishly and then much more rapidly. It felt as if we were about to take off. I’d like to say the feeling was exhilarating; in fact, I found it sickening. Tranberg looked at me and started to laugh.

Samsø, which is roughly the size of Nantucket, sits in what’s known as the Kattegat, an arm of the North Sea. The island is bulgy in the south and narrows to a bladelike point in the north, so that on a map it looks a bit like a woman’s torso and a bit like a meat cleaver. It has twenty-two villages that hug the narrow streets; out back are fields where farmers grow potatoes and wheat and strawberries. Thanks to Denmark’s peculiar geography, Samsø is smack in the center of the country and, at the same time, in the middle of nowhere.

For the past decade or so, Samsø has been the site of an unlikely social movement. When it began, in the late nineteen-nineties, the island’s forty-three hundred inhabitants had what might be described as a conventional attitude toward energy: as long as it continued to arrive, they weren’t much interested in it. Most Samsingers heated their houses with oil, which was brought in on tankers. They used electricity imported from the mainland via cable, much of which was generated by burning coal. As a result, each Samsinger put into the atmosphere, on average, nearly eleven tons of carbon dioxide annually.

Then, quite deliberately, the residents of the island set about changing this. They formed energy coöperatives and organized seminars on wind power. They removed their furnaces and replaced them with heat pumps. By 2001, fossil-fuel use on Samsø had been cut in half. By 2003, instead of importing electricity, the island was exporting it, and by 2005 it was producing from renewable sources more energy than it was using.

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– Research thanks to LA

– This article is from the NY Times and they insist that folks have an ID and a PW in order to read their stuff. You can get these for free just by signing up. However, a friend of mine suggests the website bugmenot.com as an alternative to having to do these annoying sign ups. Check it out. Thx Bruce S. for the tip.