Energy Evolution News

Wireless Electricity?

2009-09-03T05:15:00.000-07:00

Read about it here.

The Power of Fish

2008-11-30T04:52:00.000-08:00

They do keep coming, don't they? One new and wild invention after another, with much promise to change the world. This one from the Daily Telegraph.co.uk claims to be a device when placed in water that can generate electricity more efficiently, less disruptively and with smaller water flow requirements than turbines and dams.

According to the article:

The new device, which has been inspired by the way fish swim, consists of a system of cylinders positioned horizontal to the water flow and attached to springs.

As water flows past, the cylinder creates vortices, which push and pull the cylinder up and down. The mechanical energy in the vibrations is then converted into electricity.

The technology was developed through funding from the US government. There is a prototype being dispensed currently in the Detroit River, which flows at less than 2 knots.

Read the full article.

Alternative Energy Report in Florida

2008-11-28T05:26:00.000-08:00

This headline from the Miami Herald, "Solar power costlier for Florida than nuclear, report finds," signals the type of debate that will be going on more in more in the coming days, months and years.

The report was commissioned by the Florida Legislature, as part of an effort to come up with an alternative energy portfolio with a certain percentage of total energy mandated to be clean and renewable.

The focus of the report is the cost of various sources of energy, but the results are complex. Costs for various sources of energy are based on various government policies that might be implemented, and are unknown now. If the government does nothing to support alternative energy, the prices will be much higher than if policies are set to both assist renewable production and dissuade the use of fossil fuels.

Here's the projected breakdown money breakdown on different sources of energy.

Navigant [the hired consulting firm] said a company producing ground-mounted solar photovoltaic energy will need 30.63 cents/kWh in 2009 to make its investment worthwhile over the course of the plant's 30-year life. As the years go by, improvements in technology will mean that figure for solar will decline to 23.59 cents/kWh in 2020, the last year the study measures.

That compares to new nuclear costs of 12.97 cents/kWh in 2020. Natural gas base plants would be 10.09 cents.

But the study says that because solar is a intermittent power source, it would be more accurate to compare it with natural-gas turbines that turn on only peak times, which are expected to have costs of 17 to 23 cents/kWh over the next 12 years.

Wind costs could range from 17.55 cents/kWh in 2009 to 18.30 in 2020, but the report said there was not a lot of financially viable on-land wind power in the state. Much of biomass power would be considerably cheaper, with costs in 2020 ranging from 0.82 cents/kWh to 12 cents.

For power from ocean currents, power could be viable at 17.42 cents/kWh starting in 2015, declining to 13.72 cents/kWh for such plants built in 2020.

The article notes these figures will be hotly debated. The future cost of energy is a guessing game, and it's going to be interesting to see how those guesses affect policy and what the realities of the changing energy production picture will be.

2008-11-17T04:13:00.000-08:00

Here's a fascinating geological study, coming at a time when humans are so desperately looking for ways to reduce greenhouse gases:

Rocks called peridotite, which are found deep in the earth in the mantle, but which are sometimes exposed to the earth's surface by colliding tectonic places, may hold a massive potential for absorbing and sequestering carbon dioxide produced by human consumption of fossil fuels. The ability of these rocks -- which appear on the surface of the earth in large quantities in Oman and in smaller amounts at other sites around the world, including the western U.S. -- to turn carbon dioxide into solid carbonates like limestone or marble, has been known for some time, but now it is believed the process could be made fast and effective for very large quantities of CO2.

The idea would be to pressurize CO2 in water and artificially transport it to places where the rock exists. By boring holes in the rock and piping in the water, a reaction would begin to absorb the carbon. Heat generated by this reaction would then cause the rock to crack and make it possible for even more carbon to be absorbed more quickly.

Accounting for engineering challenges and other imperfections, [the scientists] assert that Oman alone could probably absorb some 4 billion tons of atmospheric carbon a year—a substantial part of the 30 billion sent into the atmosphere by humans, mainly through burning of fuels.

The scientists believe this may be one part of a complete package for sequestering carbon. Trials involving another rock that absorbs carbon are beginning shortly in Iceland.

Barack Obama and Energy Policy

2008-11-06T08:01:00.000-08:00

Here's a quote from an interview this week between Joe Klein and President-Elect Obama:

I think that the immediate economic crisis and the consequent decline in oil prices has led us to a dangerous point where maybe we start thinking in terms of business as usual again.

The biggest problem with our energy policy has been to lurch from crisis to trance. And what we need is a sustained, serious effort. Now, I actually think the biggest opportunity right now is not just gas prices at the pump but the fact that the engine for economic growth for the last 20 years is not going to be there for the next 20, and that was consumer spending. I mean, basically, we turbo-charged this economy based on cheap credit. Whatever else we think is going to happen over the next certainly 5 years, one thing we know, the days of easy credit are going to be over because there is just too much de-leveraging taking place, too much debt both at the government level, corporate level and consumer level. And what that means is that just from a purely economic perspective, finding the new driver of our economy is going to be critical. There is no better potential driver that pervades all aspects of our economy than a new energy economy.

I was just reading an article in the New York Times by Michael Pollen about food and the fact that our entire agricultural system is built on cheap oil. As a consequence, our agriculture sector actually is contributing more greenhouse gases than our transportation sector. And in the mean time, it's creating monocultures that are vulnerable to national security threats, are now vulnerable to sky-high food prices or crashes in food prices, huge swings in commodity prices, and are partly responsible for the explosion in our healthcare costs because they're contributing to type 2 diabetes, stroke and heart disease, obesity, all the things that are driving our huge explosion in healthcare costs. That's just one sector of the economy. You think about the same thing is true on transportation. The same thing is true on how we construct our buildings. The same is true across the board.
For us to say we are just going to completely revamp how we use energy in a way that deals with climate change, deals with national security and drives our economy, that's going to be my number one priority when I get into office.

Obama also pointed to a speech made early on in New Hampshire which laid out the blueprint for his energy approach. The full text of that speech, made October 8, 2007 in Portsmouth, NH, can be found here.

Obama discussed numerous points including raising fuel standards on cars and supporting research for energy efficient transportation and other technologies.

He discussed the need to reduce carbon emissions and said: "[A]ll polluters will have to pay based on the amount of pollution they release into the sky. The market will set the price, but unlike the other cap-and-trade proposals that have been offered in this race, no business will be allowed to emit any greenhouses gases for free. Businesses don't own the sky, the public does, and if we want them to stop polluting it, we have to put a price on all pollution. It's time to make the cleaner way of doing business the more profitable way of doing business." (my emphasis)

Obama urged use of ethanol, but also warned of limitations to that techonology. He supports clean coal technology and safer nuclear energy. He added, "We'll also invest in clean energy sources like wind power and solar power, so that by 2025, America can meet a new standard that will require 25% of all our electricity to come from renewable sources." He wants to lauch a fund to see that American inventions in these areas can be produced in the U.S. rather than overseas and imported.

Obama supports efficiency measures to reduce consumption significantly. He supports efforts to make American buildings more energy efficient, and to reduce household use. He also vows to reach out to nations around the world to make these efforts collective.

Here is the first part of that speech:

Big Brown Boxes Go Hybrid

2008-10-31T04:28:00.000-07:00

According to this Wired Magazine story, UPS is trying out hydraulic hybrids, starting with seven vehicles in '09 and '10. A diesel engine powers a pump pressurizing hydraulic tanks, which then power the vehicle. 70% of breaking power can be reclaimed by these vehicles, and the overall efficiency increase would be "a 50 percent increase in fuel economy and a 30 percent decrease in emissions... ."

According to some of the commentators of the article, the reason this technology hasn't been adapted by car makers is that the hydraulic tanks must be large, hence the application in UPS box trucks.

Cylidrical Solar Cells

2008-10-16T14:59:00.000-07:00

Yet another variation on the solar cell. This one is already in production, and it is specifically designed to sit on flat roofs. According to the article, these cells are cheaper to install, and because they receive light from all directions, diffuse as well as direct, they are somewhat more efficient than conventional panels.

Here's the story.

3-D Solar Cell

2008-09-21T06:12:00.000-07:00

Here is more proof that if you look for something, you just might find it. This article discusses an invention by a 12-year-old boy (!) in Oregon that could radically improve the efficiency of solar energy. William Yuan based his invention on work done by other researchers into 3D cells, but his improvements on that work are his own. The article says his design could absorb 500 times more light than current solar cells on the market, and would absorb 9 times more (normal light and UV) than other 3D cell designs.

Yuan is quoted as saying, "It'll have a really positive impact on society and the environment."

Full article and video from KATU.com here.

Ford's 65 MPG Car

2008-09-07T09:49:00.000-07:00

Here's a fascinating story about a car made by Ford that gets fantastic mileage, but that won't be sold in the U.S. Business Week reports that Ford's Fiesta ECOnetic, which runs on diesel fuel, will only be marketed in Europe starting this November. Turns out that American market for diesel fuel cars is extremely limited compared to Europe, where half the cars run on diesel fuel:

....Taxes aimed at commercial trucks mean diesel costs anywhere from 40 cents to $1 more per gallon than gasoline. Add to this the success of the Toyota Prius, and you can see why only 3% of cars in the U.S. use diesel. "Americans see hybrids as the darling," says Global Insight auto analyst Philip Gott, "and diesel as old-tech."

I find it curious that Ford can't bring a model like this to the U.S. market.

I've been meaning for quite a while to also point out this article. The company claims to be able to produce gasoline (real gasoline) from algae. The questions of mass production have yet to be worked out, and the company's web site, greencrudeproduction.com, says little, so I offer it without commentary.

City of the Future?

2008-08-25T05:13:00.000-07:00

The Ziggurat, a design of Timelinks, based in Dubai, would have made Buckminster Fuller proud. The striking images describe a self-contained city, powered by solar, wind and other renewable sources of energy, 2.3 square kilometers and able to house up to 1 million people. According to World Architecture News, the designers emphasize the city's limited use of land space, and discuss a public transportation system moving both horizontally and vertically "so cars would be redundant."

For more about the concept of a carbon neutral city, and other major projects in Dubai, read this article from ihabitat.com.

From a distance, these utopian plans strike me as science fictional: positive dreams of what may be. I am taken by the whole-system thinking and radical visions that are being propounded here, which aim to alter and improve land and cityscapes to meet the current needs of humanity. At the same time, I'm reminded of the gap between "cities of the future" presented during the early and mid-20th century and the realities of urban life today. And I wonder what it would be like to live in such a manufactured, albeit environmentally-oriented, city.

We are living in a moment that calls for radical new visions of human life and our relationship with the earth. A large array of ideas will be tried, and we'll see what shakes down.

Big Box Stores Going Solar

2008-08-12T05:16:00.000-07:00

Here's an article from the New York Times that discusses the growing number of retailers with flat roof buildings that are adding solar panels. Many are doing it now to beat the end of the tax credits for solar panels, which is due to expire December 31st (though perhaps congress will extend or create new incentives for solar power).

The article says:

American retailers are following the lead of stores in Europe, which are much further along. Store-roof projects are so numerous in parts of Germany that they can be spotted in satellite photos. Government subsidies there, however, have lasted for years.

“In Germany, there are none of the concerns you find in the United States about whether support will be around next year,” said Jenny Chase, an energy analyst in London.

Retailers in the United States tend to buy their own solar-power systems, at $4 million to $6 million for a store the size of a Wal-Mart, or enter into an agreement with a utility company that pays the up-front costs and then gives the store a break on power bills — an approach that appeals to big chains.

The article also discusses a number of issues, like the relative cost of various types of energy production, stores marketing themselves as "green" and various state incentives.

New Materials found for Hydrogen & LEDs

2008-08-07T08:11:00.000-07:00

Here are a couple interesting steps in research arenas:

In this article from Scientific American, two lines of research concerning Hydrogen Fuel Cells are discussed. Currently, platinum, an expensive precious metal, is required for both creating hydrogen and for retrieving electricity from hydrogen. Researches at MIT believe that cobalt and phosphorous added to water can replace platinum for electrolyzing hydrogen.

According to the story, "Inspiration for the new catalyst came from nature; Nocera studied the chain of processes that take place during photosynthesis, such as how plants use the energy from sunlight to rearrange water's chemical bonds."

On the other end of the equation, converting stored hydrogen back into electricity, researchers from Monash University in Australia are "developing new electrodes for fuel cells made from a special conducting polymer, that costs around $57 per counce." Platinum currectly costs nearly $1600 per ounce.

Likewise, in this article from Purdue University, researchers there claim to have found a way to make LED lights without using expensive sapphires. LEDs are as efficient as compact fluorescents and do not contain dangerous mercury. However, they have been relatively expensive to buy, largely, it seems, because sapphire has been required for their production. The researchers have found a way to adhere a lower cost substitute to a wafer of silicon.

Neither of these reports are at the market stage, and who knows what the time lag with be from discovery to production. The LED article posits reasonably priced LEDs within two years. Whatever the case, I think it's interesting to note that these discoveries are coming at a time when they are most needed. As if all you have to do is ask the right questions, and you begin to find much needed answers.

Economic Benefits of Energy Efficiency

2008-07-30T02:59:00.000-07:00

This article from Salon.com discusses the benefits to power companies, consumers and the nation of government promoting energy efficiency programs. The author worked for DOE where a competition to save energy resulted in annual savings of $90 million per year, at upfront costs of just $20 million. The idea for the competition was based on something tried at Dow, an ongoing contest where efficiency savings resulting in serious cost savings continue to be discovered year after year, when no one at the start would have thought it was possible to continue saving energy and money.

Discussed are a number of interesting examples of energy savings, plus governmental programs at both the state and federal level, which facilitate the efficiency trend. For example:

Significantly, California adopted regulations so that utility company profits are not tied to how much electricity they sell. This is called "decoupling." It also allowed utilities to take a share of any energy savings they help consumers and businesses achieve. The bottom line is that California utilities can make money when their customers save money. That puts energy-efficiency investments on the same competitive playing field as generation from new power plants.

There is also this interesting observation:

Economic models greatly overestimate the cost of carbon mitigation because economists simply don't believe that the economy has lots of high-return energy-efficiency opportunities. In their theory, the economy is always operating near efficiency. Reality is very different than economic models.

The story ends on a political note, noting a senator in a hearing calling the author's ideas "poppycock." The facts suggest otherwise.

Enviro-SUV

2008-07-22T18:42:00.000-07:00

Just have a look here.

One Wheel is Better Than Two

2008-07-01T05:18:00.000-07:00

Here's another move in the efficiency direction. The picture is worth a thousand words. There actually are two wheels, just side by side rather than one in front of the other.

The machine balances with gyroscopes and there's no controls other than "on/off". You lean forward, backward, and side to side to accelerate, slow down and turn. An eight-year-old can ride it. Right now, it does a maximum of 15 mph, but the young designer/engineer, Ben Gulak, who has just been accepted at MIT, says he thinks it could eventually be engineered to do a max of 40mph safely.

By the way, it's electric powered.

Impact of Fuel Prices

2008-06-23T04:35:00.000-07:00

I looked at gas top $4 for cheap unleaded, and thought ruefully that we'd probably never see it below that price again. The New York Times reported on June 21, 2008 that "Travelers Shift to Rail as Cost of Fuel Rises:" (sign in may be required)

Amtrak set records in May, both for the number of passengers it carried and for ticket revenues — all the more remarkable because May is not usually a strong travel month.

The angle of the article is that despite higher use, Amtrak may not be in any position to really build on higher demand because of how it has scaled back operations and it may take years to get more trains on-line where they're needed.

The article also notes that passenger trains, at least as presently designed, net a rather small overall energy savings:

Oil costs hurt Amtrak, too. Fuel is projected to reach 11 percent of Amtrak’s budget this year, up from 6 percent in 2004. The railroad is not radically more energy-efficient than other means of travel. Amtrak can move a passenger a mile with 17.4 percent less fuel than a passenger car can, and about 32.9 percent less than an airline can, according to the Oak Ridge National Laboratory.

This spring and summer the general population is just beginning to see the impact of higher fuel costs, and behavior is starting to change. People talk of driving less or merging trips. See this piece by Joel Hirschorn, for instance, arguing that going green should be taken seriously by individuals, and not be subjected to marketing scams. While real estate was on everybody's mind four or five years ago, today it's the twin problems of global warming and the high prices of fuel.

That's effecting food prices, too, which is a big part of what has made people start to sit up and take notice. The front page of my local paper, in a June 18 story about how food pantries are struggling to meet rising demand at the same time food prices are jumping dramatically, published this chart which shows food price increases just between April and July! (Hamphire Gazette, "Price hikes skewer food program," Dayna Malek, June 19, 2008 - subscription required)

Public consciousness is shifting, of necessity. Up to now, responses have largely been local and small scale, scattered here and there. I'll be curious to see how big business and state, federal and international political agencies begin to respond to these problems, which threaten to rapidly grow out of hand.

Step Into My Laboratory

2008-06-14T18:02:00.000-07:00

This article from the (London) Times Online, "Scientists find bugs that eat waste and excrete petrol," sounds like a hoax (this isn't April 1, is it?) but claims that scientists in Silicon Valley are genuinely genetically modifying bacteria to eat wood and food waste and excrete petroleum. The claims are that the process takes place in a tank and won't hurt anything and that the process is carbon neutral or better. Check it out for yourself.

Radical Changes for Energy Business

2008-05-30T14:29:00.000-07:00

A big supplier of gas and electric in Britain, reports that it sees big changes ahead for the energy business, according to an article from the Guardian newspaper:

Centralised fossil fuel fired generation would have to give way to a combination of energy efficiency and diversity of generation.

"The days of meeting an unchecked demand for energy through monolithic carbon intensive power stations are coming to an end. Increasingly the emphasis will be on energy efficiency, renewables, cleaned up fossil fuel plant and micro generation," the company said in a statement accompanying its full-year results.

My sense, too, is that energy providers will need to become facilitators of power generation and delivery, and that power will be distributed in thousands of smaller and larger locations, including residences and businesses.

Read the full story here.

Signs of the Times

2008-05-27T13:45:00.000-07:00

This spring, with the latest spike in gas prices, and the steady rise in food prices and numerous food riots around the world, there's seems to be a broad recognition that change is coming, and that we need to change our behavior to adjust to a reality which has been predicted for a long time -- though largely ignored -- but which clearly is now arriving.

Here's a news snippet showing that American driving habits have changed in the last year, with a 10% reduction in total driving miles from one year to the next. This story points to a bus company in North Dakota, which is thriving as cities like New York and Houston increase their orders of buses to accommodate greater demand. Incidentally, the buses are diesel/electric hybrids. My local paper, the Hampshire Gazette in Northampton, Massachusetts, reported today that local bike shops are reporting spikes in sales, as more people choose to bike rather drive to work and around town.

But then there's this longer piece, presented at the Seattle Green Festival in April, which forecasts how a broad change in perspective may pave the way for significant cultural, political and economic revision. Take some time with this story, because I think it paints the way out of the hole we're in as well as anything I've seen lately.

A Calculus of LED Light Bulbs

2008-05-22T06:50:00.000-07:00

I think compact fluorescents are a flash in the pan, and that they'll soon be replaced by the even more efficient, durable, varied and less environmentally unfriendly LED. Here's "Ask Pablo's" take on the math at salon.com. Site pass required, which means you may have to look at a billboard ad before clicking through to the article.

The Other Solar Power

2008-04-15T05:58:00.000-07:00

In this article by Joseph Romm at Salon.com, Romm argues that a simpler form of solar energy, concentrated solar power, may be the silver bullet to save humanity from global warming. Perhaps he's overstating the case.

On the other hand, Romm presents a historical perspective, arguing that the Chinese used mirrors for igniting firewood, and that the principle has had numerous other applications through the years, including the potential for steam production, but that the technology was placed on the backburner when oil was discovered as a cheaper and more versatile replacement for coal.

Romm argues that converting solar heat to electricity, by heating a fluid and running it through a turbine, requires zero carbon emissions, and it can be incrediby productive (see my first blog entry on solar towers). For example, Romm claims 92 square miles of mirrors in Arizona could meet current U.S. power needs.

Here's my meta-take on all this, if you'll indulge a flight of fancy. Each area in the world will develop its own sustainable energy plans. These will range from coal to geothermal, from solar to wind, from whale oil to pedal power - there will be a place for it all.

Here's the kicker, though. We'll begin to see new types of storage systems, so that there is less need to transfer one kind of power to another, thereby preserving even more energy for specific rather than entropic use. In fact, overall world energy use (by humans) will increase by orders of magnitude, yet all the power will be harvested and stored sustainably.

Mechanical energy will be stored mechanically using new kinds of fly wheels with magnetic axels, and micronic gearing systems will be developed so mechanical power can be distributed at healthy distances for subtle ranges of purposes without loss to friction.

New electrical batteries, some employing biological components and hydrogen cells, will store small-scale, locally produced, clean electricity, for uses in computers, audio and video production, and connection to world wide communication networks.

Heat will be stored as heat, and coolth as coolth, through the use of underground water tanks and other ingenious forms of mass heat storage.

Perhaps we will learn the secrets of storing carbon in petroleum, and oil and gas combustion will continue to have its place. Clean burning wood, coal, and oils of all stripes will continue to be required for ground transportation and flight, high-powered construction and maintenance equipment, and portable tools requiring high power input over short spurts.

Nuclear energy, too, will find its proper place. Not for the mundane purposes of residential and commercial electric production or horrific warfare, as it is currently being used, but primarily in humanity's quest to see and hear and meet our neighbors, among the stars.

Wind Power News

2008-04-09T04:44:00.000-07:00

This article, which largely focuses on companies around Sacramento, California, discusses some of the issues making wind power more appealing. It notes a trend for companies to place wind turbines on their roofs, and it discusses some of the technologies available and legal challenges to further development of small scale wind power generation. The article also notes that wind production increased 45 percent in 2007.

Marquiss Wind Power is one of the companies mentioned in the article. Their windmill is pictured above. According to the story, Marquiss "is marketing 5- and 10-kilowatt wind turbines which cost 29,000 and 59,000 dollars respectively."

Read the full story here.

Floating Wind Mills

2008-04-05T06:24:00.000-07:00

Here's an interesting article about the newest generation of wind mills under development. There's a push underway to satisfy the cost demands of producing wind power at sea, while also not messing with the pristine look of the ocean.

"[I]t will be out of sight and thus, the company hopes, out of mind for competing local interests such as tourism. The site off Cape Cod where Blue H intends to install a test platform next summer for its first U.S. wind farm will be 23 miles off the coast."

Compressed Air Car #2

2008-03-27T04:42:00.000-07:00

We reported earlier this year on a compressed air car being manufactured in India by a French company. Now the New York Daily News reports that the company, with a headquarters in New Paltz, New York, is planning a version for the American market available as early as 2010. The article claims:

"Electricity powers an onboard compressor to compress air to 4,500 pounds per square inch into a pressure tank contained in the vehicle," ZPM communications director Kevin Haydon told the Daily News from New Paltz. "This can be done in a garage overnight and it will take 1-2 hours. The compressed air is then used to power the engine."
Their car will travel about 1,000 miles at up to 96 mph on one fill-up.

Read the story here.

One side note about hype. Having been writing these posts for going on a year, I have discovered that the claims made by companies, and reported in the press, are often greater than the outcomes. Time frames, prices, energy efficiency and other factors, may be exaggerated. The reality is slower, more costly and not quite as efficient as initially projected. Some reports of amazing new inventions and projected market developments never come to pass.

Still, I think it is well worth reporting these developments. For one thing, many of them are actual inventions, and they all point to a trend of more energy efficient and elegant design in response to the changing conditions of contemporary life. Not all these things will work out as hoped, but in general, I have found that reporting these developments has begun to subtly alter my thinking about the technology of the future. My hope is that others will also be stimulated to think along new lines as our society navigates this period of climate change coupled with a need to use resources in a more organic way.

Pedal-Powered Wheat Thresher

2008-03-26T04:31:00.000-07:00

Here's an interesting and short video made by a Hampshire College student in Amherst, Massachusetts. The link was sent to me by the bicycle maker across the street from me, who is a member of an emerging sustainability group in the rural region in which I live. The student designed this small, pedal powered wheat thresher in the hope that tools like his will make it possible for more people to grow grains at the local level, as they now grow flowers and vegetables, to supplement their own food production.

Ooh, That Road Is Hot

2008-03-06T03:56:00.000-08:00

Here's an ingenious design that allows roads to double as solar collectors for heating an office building. In summer pipes crossing under the surface of the road heat water from the hot asphalt, which is then piped to an underground aquifer 100 meters below the surface. Heat exchangers there allow the heat to be stored underground until winter, when the circuit is switched. The heated water is then used to heat an office building before passing back under the road where residual heat keeps the road free of ice and snow. When the temperatures approach freezing, the water is pumped back down to the aquifer again. An added benefit is that the system actually helps cool the road in summer, saving wear and tear on the asphalt. The system is was designed by Arian de Bondt, an engineer for the Dutch building firm Ooms, and is functioning at their office in Scharwoude.

Read the full Economist article here.

P.S. It looks like "The Economist" is featuring a small section of green technologies. They also report on an idea, which is in the research stages, for using algae to recapture carbon coming out of smoke stacks. The algae could be dried and then put through the plant again or converted to biodiesel. They also have this article about the quest for a longer-lasting, lower energy light bulb.

Wave Runner

2008-02-29T08:38:00.001-08:00

This cute little boat takes wave power (no matter which direction it comes from) and converts it to up and down fin motion, in the way a dolphin propels itself through the water. The Japanese sailor captaining the boat plans to make a run from Hawaii to Japan – 4,350 miles – in an attempt take the world record for the longest distance traveled in a wave-powered boat. (Ken-ichi Horie has already won world records for similar Pacific journeys in a pedal-powered and a solar boat, as well as for a solo trip across the Pacific in a catamaran made from recycled beer barrels).

Top speed is only 5 knots, which means it would take 2 or 3 times as long to cross the Pacific as a diesel-powered freighter. Still, the design is elegant, and yet another example of harnessing freely available energy during this time when the age of fossil fuels seems to be waning.

Read the story from Popular Science here.

Green Energy Storage

2008-02-25T14:44:00.000-08:00

This article from Reuters, for a general audience, is indicative of how some of the details of the emerging alternative energy movement are beginning to come on-line. The story begins, "Energy storage is an unglamorous pillar of an expected revolution to clean up the world’s energy supply but will soon vie for investors attention with more alluring sources of energy like solar panels..."

Three technologies are discussed for storing energy: First, a longer lasting alternative to lead-acid batteries, which currently are often used for storing solar power. Second, a hydrogen battery produced by a company in the UK, "an electrolyzer," which could be used to store wind and solar power, and then later use the hydrogen produced and stored for cooking, driving a car or producing electricity. Third, there's a new lightweight lithium-ion battery, which will be used in what may be the first mass-produced electric vehicle.

As all these pieces begin to fall in place, I would imagine that people will be putting those pieces together in ingenious and surprising ways.

Moth Eyes and Solar Absorption

2008-02-24T06:07:00.000-08:00

According to one story, a scientist visiting the San Diego zoo phoned his lawyer and said, "I'm standing here at the tiger cage and let me tell you, I need you to file suit for me immediately. This animal has stolen the patent on the my new proprietary shock absorption system."

Much of the best of the invention of the coming period will in fact mimic nature and natural systems, which have been honed to perfection over millions of years. PhysOrg.com, for example, reports that Moth eyes may hold key to more efficient solar cells. Peng Jiang, an assistant professor at the University of Florida, noticed that the eyes of moths have a subtle structure that reflect extremely little light, about 1 to 2 %. Compare this to silicon, which is highly reflective, a factor that greatly decreases the efficiency of silicon cells. Further, the non-reflective coatings that are currently painted on solar cells are both difficult to manufacture and expensive, yet still reflect a whopping 35 to 40% of the sun's rays.

Jiang's solution capitalizes on evolutionary influences that have helped make moths less visible to nocturnal predators. He's created a substance with a similar nano-structure to moth eyes that is both simple to manufacture and inexpensive to produce. In fact, the substance effectively grows itself. Read the article here for more details on the process.

According to the report, launching a startup company to put the cells into production is the next step. Let's hope the moths don't sue.

Gravity Light

2008-02-21T05:31:00.000-08:00

This LED floor lamp invented by a graduate of Virginia tech recently won 2nd place at the Greener Gadgets Conference (sponsored by inhabitat). The light is four feet tall, made of acrylic, and is powered by weights placed at the top of the unit which turn a rotor as they descend. No cords, no batteries, no electric input required.

The light uses 10 LEDs which give a bluish hue. But as the unit ages, it is believed that the acrylic casing will yellow and that in about 10 or 15 years the lamp will provide a more natural interior light. Output is equivalent to a 40-Watt bulb and runs for 4 hours before the weights need to be reset. The designer, Clay Moulton, says the light could run for 200 years in continual operation, and the impression given is that the LEDs would give out before the drive mechanism.

The implications of this type of design resonate widely. How can products be made to last longer, require less energy input and be powered in ways that utilize subtle forms of energy readily available? Beyond that, how can new designs be attractive and also involve the user in a way that reinforces the elegance of this type of design? Look for more of this type of work as the conditions continue to ripen.

Another Alternative

2008-02-18T04:56:00.000-08:00

I've come across yet another green blog -- this one focused on the concept of green design. Inhabitat.com reports today about a new concept announced last week by the Los Alamos National Laboratory. Using existing nuclear facilities, a carbon-based fuel could be produced through an electro-chemical process. The carbon would be drawn from the air, and the fuel would be carbon-neutral and sulfur-free. Initially, the intention would be to use the fuels in transportation and industry.

The press release from the Los Alamos National Laboratory can be read here.

Essentially, the new fuel sounds like a battery for the storing and easy transportation of energy. However, the question remains whether nuclear power is a viable, safe and green technology. I have to wonder if other forms of electrical production could also be used to facilitate the production of this fuel.

Wall Street Finance and Green Tech

2008-02-11T19:14:00.000-08:00

I just discovered a web site on cnet called Green Tech Blog. The first post I came across is fascinating, stating that:

[T]hree financial titans--Citigroup, J.P. Morgan Chase, and Morgan Stanley--announced "The Carbon Principles" to provide guidance to energy companies in managing carbon risks. The upshot of The Carbon Principles is that these big banks are stating explicitly that going forward, they will only provide debt financing to new power projects if proponents can prove that the proposed plants will remain economically viable under future climate change policies.

Apparently, these companies see action to reduce carbon emissions at the federal level as imminent, and they want to be sure that investment in the energy market reflects this perception. Read the rest here.

This is a blog to keep an eye on. There were half a dozen posts just from today, and two from Friday.

Solar Takes Off in California

2008-02-02T14:27:00.000-08:00

This article from the New York Times (may require login) adds something to the previous posting. The report discusses a booming market for solar panels in California, due in part to greater demand, investment and state and local incentives. These factors are creating new jobs, lowering prices and making it possible for more and more installations-so long as the installers can keep us.

Effect of Ending Green Energy Credits

2008-01-30T08:38:00.001-08:00

Here's a short opinion piece from Green Energy News. The article quotes a joint statement of the National Hydropower Association, Geothermal Energy Association, Solar Energy Industries Association, and American Wind Energy Association, reporting that 6000 Megawatts of renewable energy came on line in 2007, and that the industry created many many good jobs for Americans. However, the statement then points out that the number of new project starts is declining now because federal credits for renewable energy expire at the end of the year. The article urges action by the federal government now to renew those credits.

I'm led to wonder to what extent individual states will try and pick up some of the slack. For example, here's a report the other day from the Associated Press that Massachusetts will be implementing a program to support residential solar panel use. The article points out the Massachusetts will be basing its plan on those in New Jersey and California.

Exploring Alternate Solar Possibilities

2008-01-10T04:02:00.000-08:00

This article reports on a new invention -- the Johnson Thermoelectric Energy Conversion System or JTECS -- that the inventor claims will convert solar energy to electric at 60% efficiency. It's an unusual system that works with heat differentials and a type of hydrogen cell to produce the electricity. It works as a closed system with no waste, input or output of any kind, other than the heat produced by the sun. The article also says this system, which is supported by funding from the National Science Foundation, could potentially be used to produce electricity from waste heat produced by internal combustion engines, and perhaps any other source.

Compressed Air Car

2008-01-05T05:53:00.001-08:00

This new car runs on compressed air, with no pollution or emissions other than air. It fuels in minutes for a couple dollars, and it will be marketed for about $7000 in France and India perhaps by the end of the year. There is an associated video with the story, all of which can be found here.

Solar Surges Ahead

2007-12-27T06:42:00.000-08:00

This blog entry on Grist Environmental News and Commentary points out that Nanosolar has shipped its first panels, and that the company means business. Its new factory in San Jose will be producing more panels than all other companies in the US combined. These panels are printed thin-film cells. Significantly, the commentator points out that the price of these panels will undercut the price of new coal production. Read about it here.

Transportation Developments

2007-12-19T07:39:00.000-08:00

Here's a fun article about a guy who's a motorhead with a talent for hotrodding big vehicles to be both more powerful and more efficient--often with the ability to run on a variety of fuels. For example, he's modified a Hummer to get twice the mileage with twice the power using a diesel motor which can run on grease as well. He's cut CO2 emissions, too, by as much as 80% in some of the cars he's messed with. In many cases he uses 90% factory parts, and he wonders why the big boys can't do this stuff themselves. The article suggests they're starting to take notice. Read all about the Motorhead Messiah here.

Then, this story reports on a company that's promoting the use of giant parachute kites for reducing energy needs in ocean shipping. Computer chips are used to measure winds and maximize efficiency of these systems. The company aims to equip 1500 ships by 2015. Read about the Football field-sized kites for ships here.

Being Green Can Produce Jobs

2007-12-10T06:05:00.000-08:00

With the US economy on the rocks or near to it, some look to the green business sector for hope. In the book Natural Capitalism (which I couldn't recommend more highly) Hunter and Amory Lovins and Paul Hawken argue--for one thing--that there's huge money to be made and limitless work available in the field of fixing the planet.

Here's a story from Time Magazine which makes the same point. Van Jones (pictured above) is promoting programs that "Give the work that most needs to be done to the people who most need the work." The article says his message is to "solve two pressing problems--pollution and poverty--at once."

Other pertinent ideas:

"For the environmental movement, embracing Jones' message means recasting global warming not just as an existential threat but as an enormous economic opportunity."

"A study by the Cleantech Network, which tracks green investment, found that for every $100 million in green venture capital, 250,000 new jobs could be created."

By my math, that's just $400 per job. Hmmm...

It's a short article. Go read it all.

Wind Energy Plus (in Minnesota)

2007-11-27T05:27:00.000-08:00

While this article is specific to Minnesota, where it is believed that wind in particular holds some of the best promise for meeting renewable energy mandates, it also covers a range of other technologies that are being tried, and it highlights some of the challenges of introducing new methods of energy production, one of them being not enough transmission lines to carry electricity from wind turbines.

Some of the other alternative energy methods mentioned are converting coal to oil, burning turkey litter to generate electricity, converting grass seed waste into an energy source, and using electricity derived from wind to produce hydrogen.

Read the story here.

Power to the People

2007-11-20T07:04:00.000-08:00

Well, I don't think it is going to change the way big energy produces power. But on the other hand, it is an indication of what is possible, and it sounds like fun.

David Butcher's Pedal Powered Generator advertises $50 plans to build your own bike powered generator. If you buy the parts new, they cost about $230. If you recycle an old bike, you can do better.

There are videos and other information if you click the links on the left side tab. I was struck by this note under one of the videos:

At the Green House event in San Francisco, the PPPM simultaneously powers: Cell Phone charger, Desktop Fan, DVD Player, 2 LED and 2 Compact Fluorescent Lights and a Laptop (battery charging). Burners were interested to hear that a single 60 Watt incandescent light required more power than everything listed above combined.

Waste Heat to Energy

2007-11-11T13:56:00.000-08:00

Here's a fascinating story about how waste heat going up the smokestack can be turned into a profitable commodity with waste heat electrical generators. According the article there's a huge potential for overall energy savings. I wonder if it's something utilities might offer as a service to customers.

There's an interesting twist in the article. It cites a recent situation in Massachusetts where this type of energy production was not included in a clean energy bill because solar and wind advocates feared losing government money. The article cites people saying that one energy conserving initiative should not preclude another -- we need to do all these things. Still, that the issue came up at all is an indication that even among those advocating alternative energy production there will be political differences.

Read the story here.

Cobb House and Lifestyle Change

2007-11-07T08:18:00.000-08:00

Here's an interesting example of a woman who left a high paying career to live more simply. She built her own small "cob" cottage. Since her cob house -- made of mud, essentially -- is placed in a residential community outside Seattle, it is interesting to see how she worked to make her house acceptable to the neighbors and building inspector, alike. It is also indicative and reflective of a new way of thinking about how a growing number of people want to relate to the world.

Read the article here.

Unusual Transport

2007-10-26T07:22:00.001-07:00

Some day, no doubt, the likes of ocean cruise liners, tankers and large cargo ships, and flying machines like jet air planes and helicopters, will seem dated and dinosaur like in their ability to convert energy to motion. Here are two examples of the new wave of machines which may some day alter the way we move around.

First, this strange boat which can cross the Atlantic on a tank of diesel.

Then there's this plan for a luxury air cruise liner which is to be a kind of blimp/jet hybrid, which could take off and land just about anywhere without the need for long runways. It's not clear to me from the article if it saves energy in any way, but perhaps it indicates a new direction of possibility.

"Unlike its dirigible ancestors, the Aeroscraft is not lighter than air. Its 14 million cubic feet of helium hoist only two thirds of the craft's weight. The rigid and surprisingly aerodynamic body—driven by huge rearward propellers—generates enough additional lift to keep the behemoth and its 400-ton payload aloft while cruising. During takeoff and landing, six turbofan jet engines push the ship up or ease its descent."

Full story here.

Seeing Things in the Round

2007-10-26T05:51:00.001-07:00

I've read more than my fair share of bad news this week. Here's one more story, this one delivering the cheery news on the diminishing number our closest primate relatives around the world. The relevance here is this section:

Another problem is habitat destruction to make space for biofuel plantations such as oil palm. Developed economies such as the US and Europe are pledging to use more sustainable energy sources to combat climate change, but this is having a knock-on effect on tropical wildlife. "It is creating a huge market and now in several countries politicians are thinking of converting tropical forest areas to palm plantations," he said.

It seems to me that any thinking that fails to see -- or attempt to see and account for -- the full implications of various human actions simply prolongs the cycle of bad news.

Peak Oil

2007-10-22T17:02:00.000-07:00

A German based group released a report in London today stating that world oil production peaked in 2006. The group based its conclusions on actual production rather than estimates of reserves. While reserve estimates suggest 42 years more oil supply at current consumption rates, the group believes there is only two thirds that amount and that production will be halved by 2030, declining at a rate of 7% a year. The report also warns of social and political unrest and wars as a result of oil shortages.

Read the full report here.

Increase Your Need

2007-10-14T17:45:00.000-07:00

Here's a brilliant idea, which may provide low amounts of energy to the developing world. A California-based inventor has developed a wind belt (as opposed to wind mill) for creating small amounts of electricity in a low tech form for powering LEDs and radios in developing countries. Read the article and watch a video about it here.

Emphasis on the low tech nature of this invention: Said Peter Haas, founder of the Appropriate Infrastructure Development Group, “If Shawn’s innovation breaks, locals can fix it. If a solar panel breaks, the family is out a panel.”

Old and New

2007-10-13T05:54:00.000-07:00

A growing awareness has been forming in my mind that the phase of technology we are entering is going to rely on a subtle blend of ancient and pre-industrial technology harnessed with modern materials, engineering and know-how. This fascinating story called The Mechanical Battery posted at Damn Interesting by Christopher S. Putnam is a prime example of how that type of thinking is struggling to crack itself out of the egg in which it is incubating.

The "flywheel", as ancient as pottery, but also key to the industrial revolution and still in use everywhere, could serve as a powerful, compact battery. NASA and automakers alike are beginning to take the idea seriously. Using magnetic bearings which allow the flywheel to take a charge fast, spin at phenomenal speeds, and discharge the energy incrementally but powerfully, modern flywheels await the work of engineers to flesh out the details.

Incidentally, these types of flywheels are already being used by energy industries to store energy and help regulate the grid to prevent brown-outs.

Read the full story here.

Algae Studied to Restore Environment and Advance Development of Bioenergy

2007-10-12T03:40:00.000-07:00

University of Minnesota researches, working in conjunction with the DOE Joint Genome Institute, today published the results of a genetic study of an ancient algae that may produce new biological strategies for capturing developing biofuels, assimilating carbon from the atmosphere and removing toxins from soil. The organism, Chlamydomonas reinhardtii (called "Chlamy" by researchers), is a one-celled ancestor of plants and animals that retains characteristics of both. The study, which is a part of the Department of Energy's Joint Genome Institute, is also expected to advance research in understanding a variety of human diseases, including dyskinesia, a neurological movement disorder, and polycystic kidney disease.

Read the full article here.

Texas Wind Power Development May Spur Competitive Transmission Development

2007-10-06T07:23:00.000-07:00

This article from the Dallas News reports that legislation requiring 10,000 MW of renewable energy resources in Texas by 2025 may have the effect of creating competition among transmission companies for the right to develop the transmission facilities to bring wind power from West Texas to densely populated North Texas. The Texas Public Utilites Commission is designating Competitive Renewable Energy Zones - regions in West Texas with enough wind power potential to warrant special transmission lines - and will then solicit competitive bids to build the lines from transmission companies that want to compete for the privilege; the PUC has not yet determined whether it will take bids from out-of-state transmission companies.

First Ski Resort Windfarm in North America

2007-10-05T07:59:00.000-07:00

Jiminy Peak Ski Resort in Hancock MA works to counter the negative effects of global warming at ski resorts by generating 33% of its own electricity from this wind turbine.

New York Solar Energy Industries Association

2007-09-24T16:34:00.000-07:00

Here's an interesting advocacy and eduacational organization, based in New York State, working to advance the uses of solar energy. Look at the New York Solar Energy Industries Association (NYSEIA) web site here and click here to join their group.

Industrial Consumers Change Their Position on Competitive Markets

2007-09-22T18:36:00.000-07:00

This article from the Allentown, Pennsylvania Morning Call reports that some large industrial electricity consumers are now opposed to the same competitive wholesale electricity markets which they had strongly supported in the late 1990's. The article noted that company officials from Allegheny Technologies are considering whether to expand their current Pittsburgh operations, or move to another state where there are no competitive electricity markets; industrial energy customers such as Allegheny Technologies were among the first and most forceful advocates of ending the state's traditional regulatory control over the electric industry in favor of determining electricity prices by market forces. However, these same customers now believe that a basic element of the structure of the competitive markets - marginal pricing - is responsible for their increased energy costs.

Read the full article here

Question Mark Surrounding Biofuels

2007-09-21T09:30:00.001-07:00

There's a great rush to develop biofuels as an alternative to burning fossil fuels, but the excitement may be tempered by reports like this one, which raises questions about the way biofuels affect the environment. A scientist, Nobel prize-winning chemist Paul Crutzen, has recently shown that microbes responsible for the production of biofuels may create more nitrous oxide (N2O) from fertilizer than previously thought. Since N2O is greenhouse gas, the implication is that biofuels may actually contribute more to global warming. A scientist from Princeton disputes the findings.

Read the full story here.

Revolutionary Heating Tube

2007-09-17T06:59:00.000-07:00

How this 12-inch miracle tube could halve heating bills

This story from the English newspaper, The Daily Mail, describes a new invention (which scientists have yet to explain) which produces more heat than electricity put into it. The company that designed the heating tube hopes to have a product on the market in 18 months.

FERC Staff Issues Assessment of Demand Response Programs

2007-09-11T11:04:00.000-07:00

FERC Staff reported that the level of and interest in electric demand response and advanced metering increased significantly beyond the activities discussed in its 2006 Assessment of Demand Response and Advanced Metering. Demand response activities reduce electricity demand during periods of peak usage in response to price, monetary incentives, or utility directives; demand reductions from these activities helped to ensure reliable operation of electric markets during the record-setting peaks of July and August 2006. Advanced metering technologies can enhance an electric customer’s ability to reduce demand in response to a higher price and an electric utility’s ability to meter and monitor the customer’s electricity use.

2007 FERC Staff Assessment of Demand Response and Advanced Metering

Kansas Utility Adopts Climate Change Policy

2007-09-11T09:53:00.000-07:00

Westar Energy, the largest electric utility in the state of Kansas, adopted a formal policy entitled the Westar Energy Climate Change Policy. This policy provides the company with a framework within which to make decisions that affect the environment, along with a set of principles that outline actions Westar Energy will take regarding climate change, including efforts reducing the amount of greenhouse gas emissions, educating the public about climate change and energy efficiency and supporting constructive public policies and initiatives.

Read the full article here.

Mobile Homes

2007-09-09T19:27:00.000-07:00

mobilehomerepair.com has an interesting site, with a forum page devoted to alternative energy. They also feature a 3-part article on building a solar air heater, as a heating supplement. Finally, they have a page title Renewable Energy Source where they offer $20 to tell them (and show them with photos) about how you made your mobile home a little bit greener.

After the Bust, What's the Next Boom?

2007-09-07T14:16:00.000-07:00

This entry from Green Energy News is ostensibly about a new technique for growing algae as feedstock for biofuels.

But it opens with an interesting historical speculation: That the American economy goes through regular boom and bust cycles. The last boom/bust cycle was the dot com bubble. The current impending bust revolves around a housing bubble fueled by unwise lending practices.

The author here speculates the next boom (which must also bust) will revolve around clean, green and alternative energy.

Read the full article here.

Better Than a Battery?

2007-09-05T04:44:00.001-07:00

This article reports a claim by a company that has filed a patent on a device it says will take a charge fast, distribute it fast or slow as needed, and will revolutionize transportation and who knows what else. Many are skeptical of the claim, and the company has yet to reveal its wonder, but the story may be worth keeping on the radar screen.

Texas Startup Says It Has Batteries Beat

New Efforts to Re-Regulate Power Markets

2007-09-04T17:34:00.000-07:00

The New York Times reports, in "A New Push to Regulate Power Costs," that many states are rolling back their initiatives or returning money to individuals and businesses; the article reports on specific efforts in Illinois, Ohio and Virginia. The article states that Energy Department data shows that the cost of power in states that embraced competition has risen faster than in states that had retained traditional rate regulation. One advocate of publicly owned power systems has calculated that, in the 2006-2007 Power Year, customers in competitive states paid an extra $48 billion for their power than they would have paid under rates in regulated states; further, the total real cost to consumers in states with competition was $292 billion in higher electricity prices since 2000. The article notes that since the early 1990s, 25 states adopted laws to induce some form of competition, but that most of these laws only address wholesale markets, and thus artificially induced competition in only part of the industry.

New Alternatives

2007-09-01T19:09:00.001-07:00

In the Washington Post there's a story, Beyond Wind and Solar, A New Generation of Clean Energy, which discusses new projects in the US to harness energy creatively.

"Beyond solar power and wind, which is America's most developed renewable-energy sector, a host of companies are exploring a variety of more obscure technologies. Researchers are trying to come up with ways to turn algae into diesel fuel. In landfills, startups are attempting to wring energy out of waste such as leaves, tires and "car fluff" from junked automobiles.

"This push for lesser-known renewables [...] also includes geothermal, solar thermal and tidal energy..."

The story mentions that the House placed a requirement in its energy bill last month that by 2020 15% of the private energy supply come from alternative energy sources. The article also profiles efforts by a Canadian company with a factory in Oregon designing test buoys to harness the energy of ocean waves.

Read full story here.

Future Energy Development

2007-08-28T18:34:00.000-07:00

The Future Energy Development entry at Wikipedia provides some interesting perspective on the development of human energy use. For one thing, it puts energy development in a social/historical context. And it takes a look at all the known possible energy sources and discusses pros and cons. The article also speaks in terms of comparing the energy input and energy output of a system, and looking at the net efficiency of energy production options. Lots to think about.

Pennsylvania Expands Alternative Energy Portfolio Standards

2007-08-26T19:29:00.000-07:00

Pennsylvania Governor Edward Rendell signed House Bill 1203 on August 24, 2007. This bill: 1) requires installation of 850 MW of solar power by 2020; 2) adds solar thermal to the list of Tier I renewable resources; 3) ensures that generators will own Renewable Energy Credits unless they expressly sell these to third parties; and, 4) clarifies that Pennsylvania utilities must purchase renewable energy produced within Pennsylvania to satisfy their alternative energy purchasing requirements.

See also

New York Planning Third RPS Solicitation

2007-08-23T16:35:00.000-07:00

The New York Department of Public Service published a press release yesterday regarding its status report to the NY Public Service Commission on the success of its Renewable Portfolio Standard Program; this report also noted that the DPS plans to issue a third solicitation for renewable generation later in 2007. The two previous solicitations issued since the RPS was adopted by the Commission in 2004 have resulted in contracts for approximately 3 million MWh of renewable energy from 26 projects, with a total capacity of more than 800 MW. The New York State Energy Research and Development Authority (NYSERDA), which administers the RPS Program, estimates that the total new renewable capacity associated with the RPS program could exceed 1,213 MW by the fall of 2008. The 2004 RPS Order required that 25% New York's electricity come from renewable generation sources by 2013; in 2004, 19.3% of electricity generated in New York came from renewable energy generation.

Tidal Power in the UK

2007-08-22T18:15:00.000-07:00

Construction of the world's first commercial tidal generator is expected to be completed before the end of 2007. Marine Current Turbines will be installing the 1.2 MW SeaGen turbine in Strangford Loughs, Northern Ireland. The SeaGen turbine relies upon large underwater turbines that are embedded in the ocean floor in locations with strong tidal flows or ocean currents; this technology is relatively quick to install and does not have the environmental drawbacks of tidal barrage generating systems, which are essentially hydroelectric dams that utilize the currents of tidal estuaries. The underwater turbines rotate relatively slowly, so they pose little threat to marine life, and they are feasible in any location that is 20-30 meters deep with an average current speed of 4.5-5 knots.

Renewable Energy Access

2007-08-21T18:32:00.002-07:00

This web site is chock full of information and news on renewable energy.
www.RenewableEnergyAccess.com/

Solar Tower

2007-08-21T15:04:00.000-07:00

A company in Australia is planning a mammoth project to produce energy using what they call a solar tower (also known as a solar chimney). The idea is to enclose a great circle of desert with a covering of glass/plastic. When the air between the ground and the covering is heated by the sun, an airflow forms toward a central tower. As the air is drawn through the tower (which is planned to be 1000 meters, over 3000 feet, tall) it passes through turbines at ground level to produce electricity. Read more about it at the EnviroMission website.

There's a lot more general information (history, workings and comparisons to other technologies) at wikipedia.

Energy Evolution News Launch

2007-08-21T14:52:00.000-07:00

This blog will provide links and original content related to the development of the energy industry.