Renewable Energy – Page 3

What if we could cool the planet?

Manmade carbon dioxide emissions are knitting a wooly blanket around the planet at a time when we really need to throw off the covers. Yet even if we could stop driving, manufacturing things and producing dirty power, it may be too late: climate scientists agree that without major intervention, existing CO2 will keep warming the planet for the rest of the century.

A potential solution is geoengineering, says Jeff Goodell, who appeared at RiverRun Bookstore Wednesday for his new book “How to Cool the Planet.” The Rolling Stone/New York Times Magazine contributor’s previous book is “Big Coal: The Dirty Secret Behind America’s Energy Future” (2006).

We have the technology, he says. We can brighten clouds or blow tiny sulfur mirrors into the atmosphere to deflect sunlight from the earth’s surface. Deflecting 1 to 2 percent of sunlight would offset the warming effect of doubling today’s carbon emissions. We can also sequester CO2 by tossing iron in the ocean, thereby feeding plankton that will consume CO2 in photosynthesis and sink to the ocean floor. Oh, and there are tree-like machines that suck carbon from the air.

So how does this sound? Like a quick fix? Like Star Wars (the missile shield)? Like a threat to our spiritual integrity?

“Reaganesque,” said one young man in the audience, almost certainly born after the 40th president left office.

Goodell understands the anxiety. He’s conservation-minded himself and, in fact, headed to the Arctic Circle this weekend to better understand the warming threat. Geoengineering was “science fiction writ large” until he talked to enough smart people to conclude that we don’t have the luxury of being properly appalled. We’re staring down calamity.

Some of his conclusions:

Geoengineering is dangerous politically. A quick fix is precisely what some people like. As the ink on the book dried, he got a delighted call from the nation’s biggest fossil-fuel lobbyist. “We love your book!” Gulp.

Worse, geoengineering could enable rich individuals or states to act unilaterally to manipulate the climate. It’s like nuclear weapons: “How do you keep the crazy person’s finger off the trigger?”

Geoengineering will happen sooner or later. We’re in a position where we’ll have to consider this at some point, he says. We should start talking about it now.

Worse than technological hubris is human apathy. “The real risk is being fat dumb and stupid a lot longer and riding into this superheated world without any heed,” he says.

Ultimately, Goodell concludes that we are, like it or not, a species that manipulates our environment. Do you own an air conditioner? Do you like heat in the winter? He works another metaphor beautifully: I’ve discovered that the people who understand this best are gardeners. I’m not much of a gardener myself, but I am married to one. My wife, Michele, is happiest when she has dirt under her fingernails, and one of her highest aspirations in life is to grow all our own food. It’s because of her that our kids have such a heightened sensitivity to the freshness of green beans that they can take one bite and tell you, with a good chance of being correct, whether the bean is store-bought or homegrown.

My wife’s garden is, by any standard, a product of human artifice. There is nothing “wild” about it, nothing undisturbed, nothing left alone. She has planted every plant and mixed the soil to her liking with imported alpaca manure. The garden is entirely organic – she’s no more likely to use Miracle-Gro than she is to dye her hair pink – but it is also entirely human. It is an artifact, but it is a living artifact. You do not walk through her vegetable garden and admire the basil and the asparagus an feel that nature has been banished.

Compelling thought indeed, but still, it’s just Goodell’s backyard.

I want to learn more. And as a professional communicator, I’m eager to see how geoengineering alights on our national radar screen. I cringe at the possibility (certainty?) that politicians and pundits will get hold of this and club one another silly with it, as with health care. And despite my status as a card-carrying independent, the possibility (certainty?) of the profit motive getting further entangled with the fate of the planet concerns me.

Can we start a conversation on geoengineering? Should we start one? If so, how?

Getting off the grid and into green biz: one man’s story

Dave Bonta hasn’t paid an electric bill in 12 years. He has no heating bill, either.

That’s because he kicked his 40 kilowatt/hr electricity habit in the 1990s and used solar electricity to fill the gap. “I learned to live on less,” he told an audience at RiverRun bookstore the other night. “Surprise, I made it to one kilowatt. It wasn’t hard…. It’s kind of nice to think we can throw our electric bills away. It’s kind of empowering.”

To reduce his power usage, Bonta – who has since co-authored the “The New Solar Home” and created the USA Solar Store chain – replaced light bulbs, got an energy-efficient washing machine, switched from a vacuum cleaner to a broom, and tossed the electric toothbrushes. “Anything that could be done with human power we did.” Even the press he used in his printing business was human-powered. He pedaled it.

Once he’d shrunk his energy footprint, he installed a small-scale solar electricity system in his rustic Vermont home. Printing customers immediately peppered him with questions about his set-up. That’s when the light bulb went off. He could sell this stuff, along with the know-how. Which is exactly what USA Solar Stores do, and the chain now has 27 stores in 11 states. It’s “about to grow like wildfire,” he says earnestly.

Bonta models his stores after the crunchy old Gateway stores, where the PCs were displayed on barnboard tables and salespeople didn’t bug you till you had a question. At USA Solar Stores, you can get anything from a conversation to a compact fluorescent light bulb to a full-fledged solar electricity setup. Or you can come in, look and leave. No worries. In any case, Bonta’s team is eager to address what he calls the three solar bogey men: expense, viability, aesthetics.

Bogey Man #1: Solar electricity is too expensive. Bonta will look at your current electric bill, figure in current incentives, find ways to reduce your demand, and show you how long it will take to pay off your gear. Even if the incentives disappear, he says, it’s still a good deal. The joy of sticking it to the man? Priceless.

Bogey Man #2: It doesn’t work too well. Wrong, he says.There’s a myth that if you wait, solar technology will get less expensive and super technology will come along. “The way it is now is pretty good. The technology is there, and the only thing missing is people who will try it.”

Bogey Man #3: It’s ugly. No, Bonta says, solar is becoming increasingly “building integrated” – where it’s embedded in your roof, not tacked on like an afterthought. And you don’t need it on your house at all. Bonta’s panels are on his shed, which gets better light anyway. The homes in his book are of jaw-dropping beauty.

Bonta is a softspoken guy. Although he has the conviction of a preacher, he has the slickness of, well, the guy who melted down in his first speech to the Rotary. But in the bookstore, once he warmed up you could tell he will not be denied: “Everything we can do to get our country on a sustainable path, we’re going to do.” If not, he says, generations will hold us accountable for the demise of the world’s ecology. “We can either explain it to them from a wheelchair, or fix it now.”

A new generation of products wraps stodgy concept of conservation in sexy new clothes

Not too long ago I described conservation and efficiency as the homely sisters in the sustainable energy world because there were no iconic products that symbolize efficiency the way wind farms and solar panels symbolize their respective industries. I was wrong. Epically wrong.

The U.S. Department of Energy recently published a list of companies that received grants to develop energy efficiency technologies. Many of these products are relatively boring, designed to toil away deep in the bowels of a power generation system, squeezing out delivering a few more watts here and a few more degrees there. Others, though, really capture the imagination. They show that energy efficiency doesn’t have to be a dud in the public eye. It can excite the popular imagination and communicate the message that using less energy is the single nicest thing you can do for the Earth until renewable energy usurps fossil fuels. And some of these efficiency products are, if you’ll grant some latitude on the use of the word, sexy.

Take Nanotrons, a division of Agiltron. Nanotron is working on a long-lasting reflective coating to improve on today’s short-lived coatings. Paint Nanotron’s coating on your building’s roof, then watch your cooling costs drop. Kazak Composites is developing building panels that retain heat and coolness, and “know” when to release them to keep room temperatures even. Lower air conditioning bills in a can? Smart sheetrock? Not bad.

Even the stuff that will work under the covers has a good cool quotient. Machflow Energy, for example, is using exotic gases like krypton and xenon in a heat pump that makes refrigerators, freezers and air conditioners run on less electricity and with no environmental damage. Considering that heating and cooling systems emit over a half billion tons of carbon dioxide into the atmosphere each year, according to the DOE, efficiency improvements make a huge difference to the environment. And you thought krypton was Superman’s home planet and xenon was the warrior princess’ brother.

Some products combine efficiency with one of the other marquee sustainable energy sources. Covalent Solar is developing coated glass that improves solar voltaic efficiency by concentrating solar energy on dense arrays of solar cells at the edges of the glass, reducing the overall number of cells needed to produce the same amount of power as a larger solar array. Giner Electrochemical Systems, LLC., is working on a new way to produce hydrogen (fuel cells, anyone?) with less electricity than current production methods.

So back to the use of “sexy.” Maybe “interesting” or “fascinating” would have been more appropriate words to describe these up-and-coming efficiency technologies, but they lack the necessary sizzle. Energy efficiency needs to be in the public’s face – and not just the “earth first” set. They’re already invested. I’m talking rank-and-file consumers. The U.S. consumer market consists of more than 100 million households and generates about 17 percent of the nation’s greenhouse gas emissions, according to EnergyStar.gov. As much as 30 percent of the energy used to power household heating, cooling and appliances is wasted. The European Union is ahead of the U.S. on the efficiency front. It has already set a goal of cutting its energy consumption 20 percent by 2020, and it knows it needs the mass audience’s buy-in to reach that goal. “To achieve this goal, it is working to mobilize public opinion, decision-makers and market operators and to set minimum energy efficiency standards and rules on labeling for products, services and infrastructure,” the European Energy Agency writes on its Web site. We’re not going to make worldwide societal changes that reduce energy consumption by talking like Mr. Spock. Efficiency needs an iconic product that combines a little Angelina Jolie sex appeal with some Steve Jobs salesmanship thrown in for good measure.

Cuttyhunk says ‘YIMBY’ to wind power

Unlike the new NIMBYs, selectmen in the town encompassing Massachusetts’ Cuttyhunk Island say they will support a wind farm off their shores, a position directly at odds with many of their neighbors to the immediate east on Martha’s Vineyard.

Residents seem to back the decision:

“I don’t think you can just say, ‘Not in my backyard,’ and expect that will be OK,’’ said resident Nina Brodeur. “If I had my preference, I’d choose not to see them. But I understand the needs of the state, and if it’s not in my backyard, it would have to be in somebody else’s. We can’t close our eyes and think we’re more special than anyone else.’’

At issue is Cape Wind, the embattled wind farm proposed for Nantucket Sound. Opponents say the landmark project will be a blight on the horizon and ruin a historic Native American site. The project also help Cuttyhunk residents, as part of Massachusetts’ poorest community, pay their utilities:

“I think the wind farm is a great idea,’’ said George Isabel, 59, who has lived on Cuttyhunk since 1968 and serves as police chief and harbor master. “People here can’t afford to turn on their air conditioners or electric heat. Something has to give, because it’s hard to survive. There could be big benefits for us.’’ (Source: Boston Globe)

Maine may be next for offshore wind. The state just announced three offshore wind test sites.

A couple other developments in the wind arena:

Endangered bat concerns stall another wind farm

A West Virginia judge just halted progress of an Appalachian ridgeline wind farm because the developer failed to account for endangered Indiana bats on the property. Developers don’t have to prove that no bats will die in the project, just that the damage – presumably from construction, displacement and/or turbine blades – is minimized. That means potentially years of surveying, planning and permits. Plaintiffs in the case said the project would kill 6,746 bats of all kinds annually. Source: New York Times.

Report: Turbines are annoying, perhaps, but not sickening

An expert panel issued a report this month questioning the validity of wind-turbine syndrome, the constellation of symptoms – including sleep problems, headaches, dizziness, anxiety, ringing in the ears – sometimes associated with turbine noise.

“There is no evidence that the audible or sub-audible sounds emitted by wind turbines have any direct adverse physiological effects,” says the report, prepared by a multidisciplinary panel of medical doctors, audiologists, and acoustical professionals for the American and Canadian wind energy industry associations. The 85-page document does admit that turbine noise can be annoying.

“An annoyance factor to wind turbine sounds undoubtedly exists, to which there is a great deal of individual variability. Stress has multiple causes and is additive. Associated stress from annoyance, exacerbated by the rhetoric, fears, and negative publicity generated by the wind turbine controversy, may contribute to the reported symptoms described by some people living near rural wind turbines.”

Source: Wind Energy

Solar in a bottle is the practical alternative for wind and sun poor states

Did you ever expect to find cutting-edge renewable energy technology in your grammar school lunch box? Right there, next to your PB&J and a slightly bruised apple most likely sat a thermos bottle of milk or soup. That bottle worked on the same basic principle as solar thermal technology, the most practical renewable energy source for regions without the right weather to support today’s marquee renewables – wind power and solar photovoltaic. Which would be much of the continental U.S.

Unlike photovoltaic and wind systems, solar thermal systems can store energy for use at night or on cloudy, windless days. Photo thermal systems are like huge thermos bottles that use sunlight to super-heat highly concentrated salt solutions. Insulated “bottles” trap the heat. When the wind doesn’t blow or the sun doesn’t shine, the trapped heat can generate steam to produce electricity or heat water to warm homes and businesses. Spain is starting work on a large-scale solar thermal plant for its Seville province in 2010.

Regions like New England, the Mid Atlantic and the Pacific Northwest could go Spain one better by combining solar thermal, wind and photovoltaic in one super-renewable energy system. We here in New England get wind, but not the steady, predicable wind that makes the Great Plains states ideal for wind power. We get sun, but not enough for large-scale solar, like the Southwest. So here’s an idea for the renewable-poor states. Build wind turbine farms for when the wind blows. Build photovoltaic arrays for when the sun shines. But don’t hook them up directly to the grid, use them to generate and store heat in solar thermal systems to match energy production with energy demand. What do you think? Practical, or a crackpot idea?

Meet the new NIMBYs

All good people support renewable energy, right?

It depends.

As the country gets serious about solar, wind and other renewables, and the government steps in with subsidies, parties that traditionally fell in line on eco issues are increasingly squaring off.

The Nature Conservancy, for example, describes how a 7,900-acre wind farm in Kansas brought in 20 miles of roads, 100 towers, transmission lines and a substation, threatening habitats for endangered birds and devouring a big chunk of the country’s disappearing prairie. The organization warns that new energy development will occupy nearly 80,000 square miles of land by 2030 – larger than Minnesota. One state director’s job is seen as mostly “reforming wind power.”

Rural Nevada got a shocker when it learned that two large solar farms, in addition to creating hundreds of jobs, would need 1.3 billion gallons of water per year, or about 20 percent of the desert valley’s supply (via New York Times).

Water plays a huge, underpublicized role in solar and many other forms of energy production, prompting one analyst to introduce an ominous new eco buzzword: “water footprint.”

Water plays a different role in Cape Wind off Massachusetts, potentially the country’s first offshore wind farm, which last week was threatened by a move to place Nantucket Sound on the National Register of Historic Places. “The identity and culture of the indigenous Wampanoag (Native Americans) are inextricably linked to Nantucket Sound,” according to a Massachusetts Historical Commission opinion.

CNET sums it all up perfectly, saying, a “new breed of NIMBY (not in my backyard) is emerging: opponents of wind or solar installations who generally support renewable energy, just as long as they are built somewhere else.”

Geothermal heat gets real

I love renewable energy stories. We know that if we can reduce our reliance on fossil fuels, we can reduce global warming, our utility bills and, one hopes, our military presence in the Middle East.

But renewable energy stories frequently disappoint. What starts out like a success story turns out to be merely a hint at renewable energy’s potential. Too often, the project isn’t quite there yet. It’s merely proposed, or it’s in the demonstration stage, or it’s underwritten by a one-of-a-kind grant, or it’s only a tiny improvement on traditional methods.

That’s why I’m delighted to hear that a local developer has invested in geothermal to heat and cool a four-unit residential condominium now on the market. According to the local paper, the holes have been dug, the pipes have been laid, and the condos are more than 90 percent complete. It looks like a rare marriage of renewable energy and the free market: private money going into a private project (with any tax credits going to the eventual homeowners).

So while the success story isn’t complete, it’s real. Explaining his rationale for the project, developer Steve Kelm said the owners will never have to worry about rate shock of fluctuating heating oil prices: “I’d rather be ahead of the curve.”

The payback on a project like this is about five years, estimates Andy Livingston, chairman and CEO of American Ecothermal Inc., also of Portsmouth, which installed the geothermal “wells.”

How does geothermal heating and cooling work?
Geothermal uses heat from the earth’s core and sun-baked surface to heat homes in the winter and cool them in the summer. You need a geothermal heat pump (GHP), which circulates a carrier fluid through underground pipes. In the winter, the heat pump uses electricity to extract heat from the ground-warmed fluid, sending re-chilled fluid back through the ground to pick up more heat. And the cycle continues. The principle is similar to an air conditioner or refrigerator. This approach is 48 percent more efficient than the best gas furnaces and more than 75 percent more efficient than oil furnaces, according to the EPA.

To cool a home in the summer months, switch the direction of the heat flow, and the same system can extract heat from the air, thereby cooling it.

What are the benefits?
Geothermal heating and cooling offer a potential large reduction in energy use, peak demand and utility bills. Aggressive deployment of GHPs could nearly halve the need for net new electricity capacity needed by 2030, according to a U.S. Department of Energy study. It could reduce electricity bills by as much as $38 billion.

More stats from the Geothermal Heat Pump Consortium, the non-profit trade association for the GHP industry:

Operating 100,000 geothermal heat pump units over 20 years would be the greenhouse gas/carbon reduction equivalent of taking 58,700 cars off the road or planting 120,000 acres of trees.
Owners can expect savings of 30 to 70 percent in heating mode and 20 to 50 percent in cooling mode compared with conventional systems.
GHPs reduce energy consumption and corresponding emissions by 40 to 70 percent over traditional heating methods (e.g., furnaces).

And there are concrete tax incentives. The IRS is offering tax credits for 30 percent of the spending on geothermal heat pump equipment, including labor. Installing a $12,000 geothermal heat pump system would give you a $3,600 credit.

Geothermal in the works
We’re just getting started with geothermal heating and cooling. The United states has more than 600,000 GHP units, the largest installed base in the world, but many European companies are ahead on a per capita basis, according to the DOE.

A Reno casino, the Peppermill Resort Spa, has tapped an underground aquifer holding 170-degree water to heat a 17-story hotel tower, including restaurants, 1,600 rooms, and the water for the sinks and showers. Owners are predicting $1 million in a year in savings with an eight-year payback.

An Iowa town is using part of a $1 million community development grant to create a shared geothermal heating and cooling system for the downtown.

Some homeowners are designing homes that combine geothermal with passive solar and knock $1,000 off their utility bills. This geothermal/solar design involves solid wood walls, an airflow envelope just inside the walls, and lots of windows on the southern exposure.

Meanwhile, there’s an entire separate industry using geothermal to produce electricity. That’s for another post, but one exciting possibility is in oil production. Oil extraction is accompanied by non-petroleum hot fluids that can help power field equipment. “With an estimated 10 barrels of hot water produced along with each barrel of oil in the United states, there is significant resource potential for this technology,” says the US DOE.

Bring it on. It’s time for more success stories.

Hydrogen is out of gas in the auto market, but has a great future in powering buildings

Hydrogen fuel cells are to renewable energy what the paperless office is to business: a good idea that never seems to take off. The difference is that hydrogen cells, in all likelihood, will take off in the not-too-distant future. Investors have put a boatload of cash into fuel cell development, the underlying science is sound, and society is more open to environmentally friendly energy sources than it ever has been.

Even when they hit the market in earnest, however, I’m skeptical that hydrogen cells will revolutionize the motor vehicle industry, as hyped. Hybrid gas/electric technology is years ahead of hydrogen cells in the automotive market, and auto companies are making huge strides in hybrid technology. Just last week at the Frankfurt Auto Show, Volkswagen unveiled a two-passenger concept car that gets 240 miles per gallon. Hydrogen fuel cell makers, by comparison, don’t even have production models on the road yet.

There might be room in the automotive industry for more than one power plant architecture, but there’s a better play for hydrogen cells – powering large buildings. There are two reasons. The first is that hydrogen cells generate heat as well as electricity. In small-scale applications like cars and homes, that heat is most likely wasted. Commercial buildings are large enough to support cogeneration systems that can capture the heat from hydrogen cells and use it either for heating or to turn steam turbines for generating more electricity.

The second reason is that hydrogen fuel cells require an energy source to produce the necessary hydrogen. Many automotive fuel cells use compressed hydrogen as their energy source, but it takes almost as much energy to produce compressed hydrogen as a fuel cell produces. Buildings, by contrast, can use any number of existing energy sources to power their fuel cells, and buildings adapt more easily to renewable energy sources such as biomass.

Hydrogen cells might be the greenest technology for powering vehicles, but history has proven time after time that incumbent technologies are hard to beat if they’re cost effective and do a good, if not great job. Look at Ethernet versus ATM (asynchronous transfer mode) in networking. ATM was faster and could support more services, but Ethernet was capable, inexpensive and well established by the time ATM came along. Ethernet remained the dominant local area networking protocol, but ATM found its niche in wide-area networking. Hydrogen fuel cells are looking at a similar situation. Hybrid vehicle technology is here and now and it yields good fuel economy at a reasonable environmental cost. That’s a moving target that hydrogen fuel cells can’t hit. Better to focus on a market where their adaptability makes them the technology to beat.

Tag: Renewable Energy