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Negative Prices for Clean Power

How do you know that congestion on high-voltage transmission grids is stranding valuable renewable energy? When the price of electricity goes negative. American Wind Energy Association power industry analyst Michael Goggin delivers a snapshot of the phenomenon in a recent column for Renewable Energy World.

Goggin points to data from the Electricity Reliability Council of Texas or ERCOT, the state's grid operator, showing an increasing incidence of generators paying buyers to take their power. According to Goggin, such conditions track the explosive installation of wind farms in West Texas -- and are very bad news for their operators.

Prices fell below US -$30/MWh (megawatt-hour) on 63% of days during the first half of 2008, compared to 10% for the same period in 2007 and 5% in 2006. If prices fall far enough below zero that the cost for a wind plant to continue operating is higher than the value of the US $20/MWh federal renewable electricity production tax credit plus the value of other state incentives, wind plant operators will typically curtail the output of their plants.

Worse still, consumers in adjacent areas are paying top dollar for power because the transmission lines between them and the excess wind power are overloaded.

Texas is running into trouble because it pushed wind power harder and faster than other states, but it is also leading the way to address what is really a nationwide problem. This summer the Public Utility Commission of Texas approved a scheme called the Competitive Renewable Energy Zone (CREZ) process to incentivize construction of new transmission lines to evacuate stranded wind power. Earlier this month a consortium of major utilities including MidAmerican and AEP announced their intention to do so.

For a detailed yet accessible look at Texas' renewable energy transmission challenge and efforts to clear out the bottlenecks, see this overview from the State Energy Conservation Office.

China Launches Mission to Attempt Space Walk Exercise

China today launched its third manned orbital vehicle into space, carrying a crew of three. The goal of the mission is to attempt the Chinese program's first extravehicular activity (EVA), or space walk, an essential step in mastering complex spacecraft maintenance routines.

According to a report from the Xinhua News Agency, the Shenzhou-7 vehicle lifted off at 9:10 pm local time aboard a Long March II-F rocket from the Jiuquan Satellite Launch Center in Gansu Province. The crew consists of Chinese taikonauts Zhai Zhigang, Liu Boming, and Jing Haipeng, all 42 years old, who will spend the next three days in space.

During one orbit, at an altitude of 343 kilometers, one of the taikonauts wearing a Chinese-made Feitian spacesuit will leave the crew cabin through an airlock to perform a number of EVA experiments. The name of the domestically produced spacesuit comes from a legendary Buddhist goddess known for flying.

Xinhua reports that the crew will also perform other key mission tasks such as releasing a small monitoring satellite called the Tianlian-I. The China National Space Administration was careful to characterize the mission as one of scientific exploration in the country's long-term interest of becoming a leading civilian space program.

"China pursues the principle of making peaceful use of space in its exploration and development," Zhang Jianqi, deputy chief commander of the manned space project, told Xinhua.

The Shenzhou-7 is scheduled to return in three days after a hard landing in China's Inner Mongolia Autonomous Region.

Hub Motors: Where EVs Smash Open Auto Design

Chrysler leapt back into relevance this week announcing no less than four EVs in development -- at least one of which it promises to sell in 2010. Most intriguing for this fan of EV technology is its claim to be experimenting with permanent magnet in-wheel motors for an plug-in hybrid version of the Jeep Wrangler. That step would be an exciting leap in auto design where the electric drivetrain frees the automobile from its heavy and design-constraining mechanical transmission and driveshafts.

For a sense of the hub motor's potential design impact, consider the experimental Reconnaissance Surveillance Targeting Vehicle that General Dynamics built for the U.S. Marine Corps. The "Shadow" is "a four-ton armored truck that has the payload of a Humvee and yet is svelte enough to deploy from a tactical aircraft." The Shadow used a series hybrid design in which the engine serves only to keep the lithium battery charged in extended range use--much like GM's vaunted Chevy Volt.

Unlike the Volt it transmits power to the wheels via power cables, rather than using its stored electricity to drive a central motor and mechanically distributing it to the wheels. The result is unprecedented traction thanks to the direct control of each wheel by its hub motor and the wheels' freedom to range up and down almost half a meter.

Then there's the Shadow's metamorphosis when it rolls out of a V-22 vertical take-off tactical plane. Sizing for the V-22's cargo hold constrained the Shadow's chassis to just 150 cm side to side -- way narrower than the 215-cm-wide Humvee. How to ensure stability in operation at that width? Upon exiting from the V-22 the Shadow extends its wheels sideways 20 cm beyond the chassis, achieving a total wheelbase of 190 cm. The key is a folding pneumatic suspension, something that's all but impossible with a mechanically-driven wheel.

The Shadow was General Dynamics' 2004 bid for what has since become the joint U.S. Army - Marine Corps Joint Light Tactical Vehicle program. Development contracts for the vehicles are expected to be announced next month.

The Shadow, Hub motors and all:


Carbon Trading Takes Two Steps Forward and One Back

Tomorrow, Sept. 25, the first U.S. auction of carbon emission permits will take place, with owners of power plants and industrial facilities in six northeastern states participating. Starting at 9 in the morning and running until midnight, it is organized by the 10-state Regional Greenhouse Gas Initiative, the first mandatory interstate carbon trading system in the United States. Meanwhile, seven states and four Canadian provinces participating in the Western Climate Initiative released a plan yesterday to reduce their collective emissions 15 percent by 2020: taking effect in 2012, it would set annual emissions caps and issue allowances to organizations affectedâ''90 percent of those allowances are to be issued free, only 10 percent auctioned.

Carbon trading got off to a rocky start in Europe, with prices gyrating and much too low, initially, to induce any real corrective action by industry. One might suppose, given the aggressive leadership on climate exercised by countries like the UK and Germany, that the European system would have set emissions caps based on their Kyoto commitments and then ratcheted down the caps each year so as to meet Kyoto targets. But that would have been politically unsellable. What Europe actually does is ask each country to volunteer a cap, which is then modified in negotiations between the EU Commission and the member governments. This of course is a recipe for intense lobbying by industry, with predictable results.

The problem is ongoing. Germany announced this week that it would seek to exempt most of its industry from the proposed next step in ETS, which would involve mandatory auction of emissions allowances in the period 2013-20 (currently the European permits are issued free). Chancellor Merkel, sounding remarkably like President Bush seven years ago, said she â''could not support the destruction of German jobs through an ill-advised climate policy.â''

The mean of means, the mean of modes, RGB, HSV, or LAB: figuring out the color of Palo Alto is a complex problem


After a year of digital picture taking, a year-and-a-half of sorting photos, and days and days of number crunching using custom software on a Hewlett-Packard desktop computer, artist Samuel Yates is finally ready to answer a question posed back in 2002: What color is Palo Alto?

Well, almost ready. Because Palo Alto is in Silicon Valley, and Silicon Valley is full of engineers. So itâ''s not surprising that a Silicon Valley artist thinks a bit like an engineer. Which means to answer the question he has to decide exactly what kind of color heâ''s talking about, and what he means by an average, and thatâ''s not so easy.

For now, on his website, Yates offers the results of a variety of calculations, yielding different colors. He looks at several so-called â''color spaces,â'' that is, ways of defining color by combinations of components, including the familiar RGB (red, green, blue), HSV (hue, saturation, value), and LAB (luminance, A chrominance B chrominance, used in US analog television broadcasts), He considered dozens of different ways of finding statistically accurate mathematical average of the 1.3 billion pixels in the roughly 70,000 photographs, one for each piece of property in town, considering mean, median, mode, Heronian mean, Identric mean, Stolarsky mean, and a long list of others, and plans to make the entire data set available for people to averag using their favorite mathematical technique. And he recalculates his averages according to seasons, months, days, specific neighborhoods, streets.


A selection of streets, looking at mean of modes of the HSV colors.

The final, official, color of Palo Alto will be determined later this fall. Yates has selected HSV as the official color space, in a nod to Xeroxâ''s Palo Alto Research Center, which used HSV in Superpaint, the first computer system explicitly designed to create art via a graphical user interface. Heâ''s narrowed the averaging methodologies down to threeâ''the mean of means, mean of modes, and mode of means. And then, starting in October, heâ''ll ask city residents to vote on which three colors most accurately represents Palo Alto. It will be, he says, a shade of green, a pleasant surprise, he says. â''I was hoping for something like that; my worst case scenario would have been grey or brown or beige,â'' spending years of his life to end up with grey would not have made this artist happy, though, he says, â''it would have been funny.â'' He expects people to campaign for their favorite colors.


A campaign button.

Meanwhile, Yates is thinking about other ways to look at this data. For example, he can find the unique color of a specific property, that is, what color pixel that property has that no other property in town contains. Using the average data for a property or a street, along with this information about unique colors, Yates is considering generating plaids; each neighborhood, for example, could have a unique plaid, with, he suggests, â''the mean of means the background color, the unique colors highlight colors, and the plaid angled to represent the compass direction of a street, the width representing the number of parcels on the streetâ'' Like Scottish clans, each neighborhood in town could have a unique plaid.


One plaid generated from the data.

Yates is hoping his years of work will find practical uses as well as artistic ones. He has offered to provide the complete final set of photographs to the city of Palo Alto at no charge; the city has already designed its 911 system to bring up a photograph of the correct building, if available, along with a parcel map, when a 911 calls comes in; Yates photographs will likely be put into that system. He expects the photographs will also be used by the city planning department to review along with existing aerial photographs when discussing building permits, and by city arborists when residents call with questions about trees in their yard (saving a trip out to the house to determine just what kind of tree theyâ''re talking about). He anticipates that the database of photos will be updated by the city during final inspections of new constructions or remodels.

Watch Samuel Yates in action below:


France Secures Britainâ¿¿s Nuclear Industry

This morning, Sept. 24, British Energy formally accepted a take-over bid by Electricité de France, which means that France will soon own and operate the bulk of the UKâ''s nuclear power generating industry. Itâ''s a measure of how far the processes of electricity deregulation, globalization, and Europeanization have gone that the story gets only secondary treatment in todayâ''s French press. It didnâ''t even make Le Mondeâ''s online homepage, while on Le Figaroâ''s it ranked 14th, putting it well â''below the fold.â''

Todayâ''s deal puts EDF in charge of almost all of the UKâ''s nuclear power plants and gives it control of most attractive sites for building new ones. This is important because the British government advocates an aggressive program of nuclear expansion, and wants to have at least four new plants in operation by 2017.

Unlike the late President Gerald Ford, to recall Lyndon Johnsonâ''s denigrating joke, EDF showed this week that it can walk and chew gum at the same time. On Friday it made a last-ditch attempt to boost its stake in Constellation Energy, which it hoped to make its bridgehead for entry into the U.S. nuclear construction industry. But Constellation still preferred to stick with Warren Buffett, who has promised the company a $1 billion cash injection.

In these troubled economic times, evidently, having Buffettâ''s confidence means more than the worldâ''s best engineering expertise.

Textbooks: The New Digital File Sharing Frontier

The music industry, which for years has been complaining about unauthorized copying and distribution of their intellectual property, now has company. Sharing their piracy misery are textbook publishers. An increasing number of book titles are showing up on peer-to-peer file sharing sites, as students, with Napster as a historical blueprint, copy then digitize hundreds of pages in order to make them available over the Web for free.

What would motivate a college kid to stand at a photocopier for hours? Revenge. Many students feel that they're being fleeced by publishers who, aided and abetted by professors, force new and ever more expensive editions of texts on young people already hard hit by dramatic tuition increases. Students argue that there is no reason, besides greed, for a book seller to introduce new versions of, say, a chemistry or calculus text in successive years. After all, they point out, the basic theorems and physical laws haven't changed since last September.

The reissues are an effective countermeasure against the bane of publishers' existence: the used book market where students can get a textâ''with the possible added bonus of passages highlighted by a student from an earlier semesterâ''for as little as half of the publisher's suggested retail price. In some cases, we're talking about a $100 difference.

Is this form of textbook sharing illegal? Yes. But the publishers, like the major record labels, asked for it. They made buying the materials essential to participation in a college course a zero-sum game. Either the publisher sees a windfall when a student is forced to buy a $200 book that contains the same information as the $50 version that his or her professor has now decided is a poor companion to the class lectures, or it makes no profit at all when that same $50 book is recycled each semester.

Think back for a second. I know I'm not the only person who once bought vinyl records and was continually amazed at how record labels would shamelessly package dreck with the great songs that motivated music fans to buy albums. Digital file sharing changed the game seemingly overnight, ushering in the current a la carte scheme that allows me to buy the three or four songs I like for a buck each. But before the music labels got religion, they had to have their pockets picked by pirates. This same scenario may be playing out again, with file sharing turning publishing on its ear.

The expanding use of bit torrent sites as giant book swaps has the publishers clawing for a way to prevent purchasers from sharing. They've hired teams of lawyers who have sent hundreds of legal notices to Web sites hosting pirated files demanding that the material be removed. But the publishing houses' proposed magic bullet is selling the texts as e-books, with digital rights management in place. Thought e-books would be significantly cheaper than their physical analogs, a student would have access only for the semester and, I guess, be limited in terms of how he or she could access the material. This, the publishers think, will help them to eliminate the used book market and illegal downloads.

Good luck with that, I say. By digitizing the books, they are eliminating the drudgery that is now the main limiting factor in online textbook trading. They are betting that they will be able to keep the files under tight control. But how successful will they be? To quote from the movie Jurassic Park, "Nature always finds a way." And the nature of young people faced with a problem created by what they perceive to be an unreasonable authority figure is to devise an ingenious solution or a brilliant workaround.

Saudi university builds top-notch supercomputer

King Abdullah University of Science and Technology, or KAUST, is building what it says will be the highest-performance computing system in the Middle East. Named Shaheen, the machine will be used by the universityâ''s faculty and its international cadre of sponsored researchers. Very well and good. Except that the university doesnâ''t really exist yet.

Next September, the graduate-level school will open its doors â'' by which time it presumably will have doors â'' to faculty and students. Backed by Saudi Aramco, the school's aim is to improve the quality of the country's scientific and technological expertise. To that end, Shaheen will be Saudi Arabiaâ''s first supercomputer dedicated to academic research, though the need to model oil and gas reserves has pulled in high-performance computing experts for years. â''In Saudi, typically someone brings in a machine and the application is always relevant to oil and gas,â'' says Majid Al-Ghaslan, KAUSTâ''s interim chief information officer, who led the hunt for the supercomputer.

For now, though, KAUST isnâ''t much more than a construction site on the Red Sea, so the machine will initially reside at IBMâ''s Watson Research Center, in Yorktown, New York.

Shaheen, which is the Arabic word for peregrine falcon, will be a 16-rack Blue Gene/P system made up of 65,536 independent processing cores. It will be capable of 222 teraflop/s, or 222 trillion floating operations per second. â''No oneâ''s ever tried to bring up this much capacity while building the facility at the same time,â'' Al-Ghaslan says. The university says its performance will fall in the top 10 of supercomputers in the world. Within two years, KAUST expects to scale the machine up to a petaflop of computing capability.

This past June, the latest Top500 supercomputer rankings registered a new record with Los Alamos National Laboratoryâ''s RoadRunner, the first general-purpose supercomputer known to have a peak performance of more than one petaflop/s, or one quadrillion floating-point operations per second.

Cleaning up the largest oil spill in the United States



Earth magazine has a riveting account of the history of the largest oil spill in the U.S., and the cleanup technologies being developed to deal with it. And that oil spill is not where you think it is, unless you're thinking Brooklyn, New York. "The plume â'' a toxic concoction of kerosene, fuel oil, gasoline and naptha (a key ingredient in napalm) â'' floats at the top of a subterranean aquifer beneath the working-class community of Greenpoint in Brooklyn."

Experts say between 17 and 30 million gallons of oil have been accumulating there since the mid-1800s. Oil companies started the cleanup about 30 years ago, but only 9.5 million gallons of oil have been recovered. According to the Environmental Protection Agency, finishing the job could take another 25 years.

To get the oil out of the ground, ExxonMobil siphons it from the water table using a system similar to skimming fat off the top of a pot of chicken soup (delicious!). So far, the company has pulled about 6 million gallons of oil out of the ground.

More Divestiture for Nanotech Companies

UK-based Oxonica announced last week what is effectively the sale of Nanoplex to US-based Becton, Dickinson & Co. (BD) for what could total up to US$7 million.

BD had been the primary client of Nanoplex technology prior to purchasing the technology outright from Oxonica.

Oxonica completed the purchase of Nanoplex at the beginning of 2006 for the issue of up to 7,538,440 fully paid ordinary shares in Oxonica. Some have valued the deal at Oxonica paying around US$21 million to acquire Nanoplex.

Yikes! Buying it for $21 million and then selling it for $7 millionâ'¿that doesnâ''t sound good.

According to the Richard Farleigh, Chairman of Oxonica (and famous for some British TV show called the â''Dragonâ''s Denâ''), the strategic deal with BD for the Nanoplex technology is part of plan for â''eliminating non-essential expenses and investing in developing the security and energy businesses.â''

Well, at least for the security part of the business that will entail licensing the Nanoplex technology back from BD. As for the energy business, thatâ''s a hard one to figure out after the legal case on the IP for the underlying technology didnâ''t go the way Oxonica would have hoped.

This news follows Nanoteroâ''s sale of its government business to Lockheed Martin also to improve the strategic focus of the company.

The realignment of a companyâ''s strategic focus can always be a tricky maneuver, especially for small nanotech companies that have managed to try to compete in sometimes half a dozen different market sectors at the same time.


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