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When I Visited Abound Solar

2 Jul
English: A part of the „Demonstration Project ...

English: A part of the „Demonstration Project at Gobabeb of Renewable Energy and Energy Efficiency“ (DeGREEE): The solar panels (Photo credit: Wikipedia)

Checking the headlines today, I noticed one declaring that Abound Solar, a solar panel manufacturing business located in Colorado, had filed for bankruptcy and was going to lay off all 125 of its employees. I was struck by the news first because I just finished writing my book about renewable energy and so I’m generally sensitive to this sort of news. But I was also struck more personally because a few years ago, while researching the book, I visited Abound and was given a tour of the facilities. Behind a glass partition I got to watch the manufacturing process in real-time, as regular sheets of glass were turned into thin-film solar panels. It was truly impressive.

When I heard that Abound was going under, I first felt bad for the good people there who showed me great hospitality and took the time to show me around. Those people will shortly lose their jobs in a very tough job market.

I also felt bad for President Obama, whose administration had backed Abound. Like Solyndra, Abound will now surely be used as an example of poor judgement on Obama’s part. But that is patently not the case. Abound was a very solid, well-run company using very sophisticated technology it had developed in-house. The company failed only because Chinese investment in solar panel manufacturing has brought the price of panels down so far that it’s incredibly difficult for small companies to Abound to compete.

While this is obviously bad for abound, it’s actually good for the solar energy sector. Cheaper panels means that more businesses and people can afford them, which spurs forward the greater cause of growing the use of solar energy around the world.

So while I feel bad for the employees of Abound, perhaps they can take some solace in the knowledge that their work has been important and that their industry is vital and growing.

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Solar Highways?

15 Feb

Thanks to the networking magic of Twitter, I was alerted to a video about a company, Solar Roadways, that intends to build roads–highways, byways, etc.–made of solar panels. Crazy? Perhaps. But maybe just crazy enough to work. In any case, you’ve gotta love the out of the box thinking. Check out this video to learn more …

Obama Stepping Up to Bat for Solar

6 Oct
South façade of the White House, the executive...

Image via Wikipedia

Big news out of the White House on the solar energy front the past few days.  First there’s the news that the Obama administration will install solar on the White House (both thermal for hot water and PV for electricity).  Then in today’s NY Times there’s a front page article about how the Obama administration has approved using federal lands for huge solar farms.

The White House solar installation is largely symbolic but a welcome gesture, especially after the slightly sour episode where the administration (rightly) rejected activist Bill McKibben’s offer to reinstall one of Jimmy Carter’s ancient solar panels on the White House.  But Obama’s gesture is still important as his first concrete, unambiguous support for solar energy.

Approving federal lands for giant solar farms is an even bigger deal.  One of the proposed projects is for a 709-megawatt solar farm using Suncatchers (basically large solar dishes) to run engines that produce electricity.  Today’s largest solar farms generate something in the range of 70 MW, so we’re talking about a giant step up, if the proposed project actually happens.

Obama setting aside federal land for solar is something akin to what’s happened in Germany and China, where government policy has pushed solar and other renewable technologies (as well as a massive buildup of fossil fuel-based power plants in China) to new heights and helped create a global market for solar panels.  The U.S. is late to the game, but this could be a sign that we’re finally attempting to catch up.

What I Learned Writing a Chapter About Solar Energy

22 Sep
On 140 acres of unused land on Nellis Air Forc...

Image via Wikipedia

So I just finished a draft of a chapter on solar energy.  Which is good.  Always good to come to the nominal end of a chunk of the book, even if it still needs polishing.

The process of diving into the world of solar energy and figuring out how to write about it was interesting. Tiring, frightening, overwhelming and sometimes tedious, too.  But always interesting.  Going in, I had a decent understanding of the basics–how solar cells work, that large solar farms were popping up around the world, that advances in solar tech were making daily headlines.  What I didn’t know was how much of what I heard about was substantial, and how much was marketing/PR bluster.  I also knew very little about the long, complicated history of solar energy.  Like most non-experts (and even many solar insiders, probably), I assumed that the solar technologies in vogue today began in the 1970s.  I was only about three or four centuries off.

Now, after 5 months of immersing myself in the history, technology, politics, and economics of solar energy, I think I’ve learned a thing or two about where solar’s been, where it is, and where it’s going.  Here’s how I put it near the end of the chapter …

If the history of solar energy innovation teaches us anything, it’s that even the most ingenious, well-designed schemes for producing cheap, reliable power from the sun face daunting roadblocks on the road to commercial success.  Yet that same history also shows us that a legacy of solar innovation marred by failed plans and dashed dreams has done little to discourage a new generation of 21st century solar pioneers from taking up the mantle and forging ahead.  If anything, new solar technologies (or, more accurately, new variations on old ideas) have mushroomed at an astonishing pace.  While I was researching this book, hardly a day went by without coming across headlines touting a new breakthrough in solar panel efficiency or the construction of “The World’s Largest Solar Farm” (of which, apparently, there are dozens).

Not that headlines tell the whole story.  After all, one goal of this book is to look beyond the headlines to get a clearer sense of what’s happening on the ground and in the lab.  After visiting working solar farms and commercial-scale solar panel factories; having visited pilot concentrating solar plants and meeting with researchers experimenting on the outer edges of solar innovation; after months spent delving into the history of solar engineering—I come away having learned a few things.

First, that the ultimate success of solar energy—the “solar revolution” that so many green activists envision—is no more assured of happening today than it was a century and a half ago when August Mouchot’s solar motor turned heads at the Paris World’s Fair.  In a world where energy consumption—driven by exploding populations and economies in China, India, and elsewhere in the developing world—is growing exponentially, solar energy, for all of its triumphs in recent years, still plays a very, very small role in meeting the planet’s demand for useable power.  And there is very little evidence that even most the astonishing advances in solar cell efficiency and power (or concentrating solar power or any other solar technology) will be able to meet a sizeable percentage of this demand. This reality is important to keep in mind when reading breathless articles in the popular press about the latest breakthrough that will supposedly change the world as we know it.[1] Because we’re in the midst of a breathtaking revolution in information technology, we’ve come to expect (and even gotten accustomed to) new technologies that appear out of nowhere and, like magic, change forever how we communicate, socialize, and even think and see the world around us.  But in the world of energy, there are no equivalents to Google or the iPad.  Unlike software and more like the auto industry, the world of energy is a complex mesh of infrastructure (oil and gas pipelines, railroads for coal transport, electricity transmission lines and so on—the vast majority of which has been built by and is geared toward fossil fuel industries), local and federal government policy, and powerful, multinational energy companies whose influence extends into virtually every sector of the global economy.  In short, solar energy, like all renewable energy technologies, will have to struggle uphill to blossom in a way that everyone I interviewed for this chapter hopes will one day happen.

And yet …

… the story of solar energy doesn’t end there.  Because the second big lesson I learned is that judging a technology or industry based only on what it isn’t, or on what it has yet to accomplish, can lead to some misguided and just plain wrong conclusions.  Compare the energy output of the world’s solar farm to that of the world’s coal-fired power plants and, yes, solar seems puny.  But consider solar technology today in contrast to where it stood only thirty years ago, when Jimmy Carter unveiled his White House solar panels, and a different story takes shape.  We may not yet live in a world where thin-film solar panels shingle every roof, or where vast solar farms have begun to displace coal-fired power plants, but the potential and widespread desire for those high-tech dreams to become reality has never been greater.  Again, in the world of renewable energy, no one technology or idea or grand vision is a sure bet.  But seen through the lens of history, and from the perspective of the dozens of scientists, engineers, and entrepreneurs I spoke with (and thousands more around the world), solar is on a roll the likes of which would have seemed utterly fantastic only a few decades ago.

[1]For example, I found an article published in Popular Science in 2007 hyperventilating over Nanosolar’s then-groundbreaking “PowerSheet” technology—basically semiconducting nano-ink printed on thin, flexible metal sheets.  Dan Kammen, founding director of the Renewable and Appropriate Energy Laboratory at UC Berkeley, is quoted as saying that “You’ve talking about printing rolls of the stuff—printing it on the roofs of 18-wheeler trailer, printing it on garages, printing it where you want.”  Several years on, have you ever seen or heard or a solar-powered 18-wheeler?  Neither have I.  And it’s most likely not because PowerSheet solar panels don’t work as advertised.  It’s more a matter of the complexity of integrating solar panels with something like a truck.

Glimpsing the Future of Solar Energy

15 Sep

One thing I like about being a science writer, and about writing a book about renewable energy, is that I get to talk with (and learn from) some of the smartest people on the planet.

For example, this morning I spoke with Michael Strano, an associate professor of chemical engineering at MIT.  After a twenty minute phone call, I came away with nothing less than a glimpse into the future of solar energy.

Strano works with carbon nanotubes–tiny, microns-wide structures that can channel atomic and subatomic particles in ways that have all sorts of industrial and technological applications.  I was interested in Strano’s work on using carbon nanotubes to enhance the absorptive power and hence efficiency of solar cells.  The science is complex, but in a nutshell in involves using carbon nanotubes as antenna or funnels to attract and channel sunlight in concentrated form onto the semiconducting surface of a solar cell.

The implications of this research are far reaching.  One of the holy grails of solar PV research is figuring out ways to make solar cells more powerful and efficient without making them more expensive.  Some solutions involve using mirrors to concentrate sunlight onto PV panels or boilers.  Strano’s method does essentially the same thing, only without the need for expensive and delicate mirrors.

Carbon nanotubes are relatively easy and inexpensive to make.  Large companies like Bayer are not manufacturing them in bulk for all sorts of commercial purposes.  PV cells enhanced with carbon nanotubes are still a ways off, but if what Strano was telling me is accurate, they’re coming.  And they very might might blaze an entirely new path in solar PV development.

You can listen to my interview with Strano here.  And learn more about Strano’s research here.

Obama says no to Carter solar panels

14 Sep

A few months back I posted an editorial about whether Obama should put solar panels back on the White House roof.  A few days ago, Obama rebuffed Bill McKibben, an environmentalist who tried to persuade the President to put one of Jimmy Carter‘s original solar panels back up on the White House.  Read a NYTimes piece about it here.  Long story short, the pres, through a few-aids, said, “no thanks.”

This is the sort of story that will raise hay among environmentalists, among right-wing anti-environmentalists, among renewable energy advocates, and so forth.  But let’s be clear–it’s a non-story. Carter’s solar panel are more than 30 years old.  If Obama is going to go solar on the White House, he should (and hopefully would) go with a state-of-the art system–something that would highlight the latest in PV and/or thermal solar tech. It makes absolutely no sense for Obama to run with an antiquated technology.

Whether or not Obama should promote solar tech of any kind by sticking on the White House roof is another question.  But I hope the McKibben story doesn’t get blown out of proportion.

Chapter Excerpt: Aubrey Eneas and the Birth of Solar Steam Power

3 Aug

In the winter of 1901, tourists enjoying the luxurious weather and swanky resort hotels of southern California were intrigued by a handbill widely distributed throughout Pasadena, Altadena and nearby towns.  “Visit the Ostrich Farm—100 Gigantic Birds,” the bill proclaimed in bold typeface above a black and white photo of the long-necked, prehistoric-looking creatures.  The farm, owned and operated by transplanted British entrepreneur Edwin Cawston, was the only one of its kind in the United States and a well-established attraction in the early decades of the 20th century.  Cawston had started out, in the mid 1880s, with 50 ostriches imported from Africa.  By the second decade of the new century, more than 1000 birds roamed the grounds.  Visitors, most of whom had never seen a live ostrich, paid to gawk at and feed the awkward birds, while farm hands entertained the crowds by riding the exotic creatures bare-back .  The Cawston farm was also well known in the fashion industry for its prize-wining ostrich feathers, then in high demand for women’s hats and feather boas.  Plucked once every nine months and dyed a rainbow of alluring colors, Cawston’s feathers achieved international fame when they won first prize at the Paris World’s Fair in 1900.

Beyond the farm’s usual attractions, however, the 1901 ad featured an extra enticement—a giant, concentrating solar motor, “the only machine of its kind in the world in daily operation,” according to the handbill, on display for no extra charge. Like the Parisians who’d marveled at solar pioneer Augustin Mouchot’s industrious sun machine at the Paris World’s Fair in 1878, the crowds that flocked to Cawston’s ostrich farm were astonished by the contraption on display—an 8300-pound monstrosity that, similar to Mouchot’s motor, featured a conical reflector consisting of more than 1700 mirrors focusing sunlight onto a long cylindrical boiler at its center.  Even Mouchot, though, would have marveled at the new motor’s towering size.  The mirrored cone had more than 700 feet of surface and measured 35 feet across at its wide end, easily doubling the reflecting capacity of Mouchot’s largest machine.  The apparatus was hitched to a track running the length of a vertical, lightweight steel tower that allowed a clock mechanism to keep the mirror angled toward the sun throughout the day.  What was most astonishing for inhabitants of arid southern California, though, was that the motor, running on nothing more than sunbeams, pumped more than 1400 gallons of water per minute, transforming the normally dry, dusty farm into a lush garden overflowing with colorful, fragrant flowers.  Drawing newspaper reporters from across the country, the device achieved national fame, including being featured on collectable cards inside packs of Wills’s Cigarettes.

The celebrated solar machine was the work of Aubrey Eneas, like Cawston a native Englishman who’d relocated to the United States to seek his fortune.  An inventor and engineer based in Boston, Eneas drew inspiration from the work of fellow immigrant John Ericsson, the famous Swiss-born engineer whose design for the ironclad steam-powered battleship The Monitor was widely credited for swinging the tide of the American Civil War to the Union side.  Like Mouchot, Ericsson believed that the industrial revolution would soon founder for lack of coal, and also like his French contemporary saw solar power as an intriguing, more sustainable alternative.  Although Ericsson’s experiments with solar motors powered by both steam and hot air never advanced beyond the prototype stage, his efforts sparked the imaginations of other American inventors, including Aubrey Eneas, who founded the Solar Motor Company of Boston in 1892.  From his base in the coal-rich east, Eneas saw opportunity in the arid deserts of the American southwest, where a growing need for steam-powered irrigation and lack of easily accessible (and therefore cheap) coal presented a seemingly ripe opportunity for solar power.  After experimenting briefly with an Ericsson-like device using a parabolic, trough-shaped reflector that had the detriment of heating only one side of the boiler, Eneas adopted Mouchot’s conical reflector design to heat the boiler more evenly and efficiently, producing a greater volume of steam.  By chopping off the bottom end of the cone and making the side more upright, Eneas increased the amount of sunlight heating the boiler, raising an average temperature of 1000 degrees Fahrenheit—more than enough, by Eneas’ calculations, to produce steam at industrial levels.

Although the machine Eneas put on display at Cawston’s farm was successful, it was only the first step in an ambitious campaign to entrench solar energy as a leading source of power in the American southwest.  Building on his triumph at the farm, in 1903 Eneas relocated the Solar Motor Company from Boston to Los Angeles and began aggressively marketing his machine throughout the region.  Before long, Eneas made his first sale, to Arizona rancher Alexander Chandler.  A startlingly handsome man with an impressive, Franz-Joseph style sideburns and moustache, Chandler had made his living as a veterinarian, with a thriving practice in Detroit.  But from a young age, growing up in Quebec, Canada, Chandler had dreamed of cattle ranching in the mythic American West.  When, in 1887, a post for a veterinary surgeon opened in the Arizona territory, Chandler jumped at the opportunity.  Pursuing his dream, Chandler soon began buying hundreds of acres of land to establish the Chandler Ranch south of Phoenix.  Recognizing that irrigating his land would cost a fortune in imported coal to pump water up from the low-lying Salt River, Chandler was open to alternatives.  Eneas’s celebrated solar engine seemed the perfect fit.  Although the upfront cost of $2160 was steep at a time when the average yearly family income was around $700, Chandler saw the benefits of a device that, once up and running, would soon pay for itself by obviating the need for expensive coal.  As soon as it was installed, in the scorching summer of 1903, the solar engine began to pay off, pumping thousands of gallons onto Chandler’s sun-baked land.

After centuries of unrealized dreams and false starts, it seemed, solar energy’s day had finally come.  Until, a week later, when it came crashing down—literally.  The great bulk and spacious reflective surface area that made Eneas’s machine so powerful was also its greatest weakness.  The massive but delicate device was vulnerable to high winds and other inclement weather, and during a windstorm the part holding the boiler erect gave way, sending the heavy tube crashing down onto the mirrored cone.  Smashed into thousands of shiny, jagged pieces, the reflector was damaged beyond repair.  Although Chandler was undaunted and had the machine rebuilt, the incident spelled the beginning of the end for Eneas’s solar dreams.  The few other machines he sold met similar fates—one destroyed by a “dust devil” (a mini-tornado common in Arizona), the other by a hailstorm.  His reputation ruined by the weather-related disasters and unable to secure more funding from his East Coast backers, Eneas left the solar power business and dropped out of the history of solar energy.


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