Rooftop Wind Power

  • Power lines lead from a wind turbine placed near a coast to catch steady breezes. New designs for smaller turbines might be used in urban areas where wind is more turbulent. (Photo by Lester Graham)

The government wants 20% of the
energy generated in the nation from renewable
resources. Today, we’re at a mere fraction of
that goal. Lisa Ann Pinkerton reports experts
believe the US could get there sooner if wind power
technology can be moved successfully to where the
electricity is actually consumed, America’s
cities:

Transcript

The government wants 20% of the
energy generated in the nation from renewable
resources. Today, we’re at a mere fraction of
that goal. Lisa Ann Pinkerton reports experts
believe the US could get there sooner if wind power
technology can be moved successfully to where the
electricity is actually consumed, America’s
cities:


Right next to Lake Erie, a large wind turbine spins hypnotically in the
breeze. Its three big propeller blades provide only around 6% of
the energy consumed at the museum where it’s located, the Great Lake
Science Center. So the big turbine is mainly for educational purposes.
The museum’s Executive Director, Linda Abraham Silver says turbine
catches the steady winds off the lake:


“We don’t want turbulence, that’s right. Steady wind is what produces
the best energy and saves the gears and instrumentation inside.”


The single wind turbine stands in a wide open space near Lake Erie, but here
on the streets of downtown Cleveland, the wind is blustery and
unpredictable. These conditions are hostile to traditional turbines.
So the conventional wisdom was wind power couldn’t flourish in urban
environments… that is, until now.


“I think the problem was the propeller, not the whole idea that wind
power was somehow unable to be captured in the city. Some people even tell
you there is no wind power in the city”


Bill Becker is an urban wind developer from Chicago. He’s abandoned the three-propeller design for a horizontal one.
And it kind of looks like a metal DNA double-helix strand. He says it’s
actually two turbine designs in one so the machine can function in low and high winds. The turbine, manufactured
by Aerotecture, is a lot smaller than traditional ones so it can be mounted on rooftops. Becker’s installed 16 on skyscrapers in
Boston and Chicago. They can generate enough electricity to power two homes annually in a typical breezy day.


Becker’s not the only inventor who thinks there are better alternatives
to expansive turbine wind farms sprouting up on ridges and bluffs
across the country. And in England, the three-blade concept isn’t dead
yet.


The company Quiet Revolution has a vertical turbine with blades curving
up and down it. It creates power in even the slightest breeze, but that
power isn’t any more than Becker’s model and it costs 4 times as much.


Instead of catching open wind, in California entrepreneurs are
capturing a very specific type of wind: breezes traveling up and over
building parapets. Those are walls that extend past the roof lines of
big box retailers and factories:


“There’s a potentially great wind resource on those buildings that’s
not being tapped into today.”


Spokesman Steve Gitlin says the company AeroVironment is tapping into
this wind with systems of 15 turbines each. These futuristic rotating
fans, each about six feet tall, line the parapets of flat-roofed
buildings:


“What we’ve done is figured out there’s a unique acceleration of wind over that edge of the building
so the turbine’s designed to actually extend above and angle slightly downward
over that acceleration zone.”


The AeroVironment system is the most expensive… six times as much as the Aerotecture double-helix
design and generates slightly more electricity. It does, however, operate in very low wind, five miles per hour or less.


Ken Silverstein says this range in cost and efficiency shows the urban wind industry is
still growing. He edits Energy Biz magazine, and
adds to make an impact on the market, these turbine costs must come
down. And the government could help jumpstart the industry:


“It needs to develop, it needs to reach economies of scale so that the
technology improves, so that the costs come down and so that wind becomes more widespread than it is today.”


But Silverstein says, urban wind designs like these offers the hope
that businesses and even homeowners could capture the energy of the wind
directly on their own.


For the Environment Report, I’m Lisa Ann Pinkerton

Related Links

Does Fair Trade Coffee Work?

Coffee beans can be pretty confusing these days.
At times it can seem like a political, even a
moral decision. You might want to buy those pricey specialty beans,
but now the supermarket also carries beans labeled Fair Trade
Certified. That might seem like the nicer thing to do for the farm
workers – and the environment. Julie Grant takes a look at those
claims:

Transcript

Coffee beans can be pretty confusing these days. At times it can seem like a political, even a
moral decision. You might want to buy those pricey specialty beans,
but now the supermarket also carries beans labeled Fair Trade
Certified. That might seem like the nicer thing to do for the farm
workers – and the environment. Julie Grant takes a look at those
claims:


Ahhh… it smells great in here. The owner of this coffee shop travels
the world in search of the best coffees. Linda Smithers has gone to
places such as South and Central America, Africa, and southern Asia to
visit farms and to taste coffee. She imports her favorites and roasts
them at her store.


And she has high expectations. Smithers wants to make sure that if
you’re paying a few dollars for a specialty coffee, it’s a satisfying
personal experience:


“And coffee should be able to do that for you. It should bring you
closer to you, and closer to the farmer. You should feel like you know
the farmer. And you feel passion and an intimacy with that farmer.”


I should probably have mentioned, Smithers really loves coffee.
She says the best coffees are grown on farms that are good to the
coffee trees, the local water, and the workers:


“Happy workers, safe workers, produce better coffee. They just do. I
see it every time I go to a farm. I see it when a worker enjoys what
they’re doing and feel they’re getting a fair price. They’re just like us. You
would not enjoy working and at the end of the day being given 20 cents.
You wouldn’t be happy with that. You wouldn’t work in a pleasant
way. And you wouldn’t pay attention to picking the ripe beans rather than the unripened beans.”


The Fair Trade label claims it’s found one way to help keep coffee
farmers happy and safe. The Fair Trade certification is supposed to be
a guarantee that farm co-operatives will get at least $1.21 for a pound
of beans. When coffee prices are low, that can be twice what other
farmers are paid. Fair Trade also promises farm workers have safe
conditions and are paid a living wage.


Michigan State University Professor Dan Jaffee wanted to know if the
Fair Trade system was doing what it set out to do:


“The Fair Trade movement claimed to be able to help bring them out of
poverty, improve their farming practices, make them more sustainable
and just generally improve conditions a lot, and I was interested in
finding out whether that was the case.”


Jaffee spent a few years in Oaxaca, Mexico studying two farming
communities. Some coffee farmers were part of Fair Trade
cooperatives, some decided against it. He’s just published a book called
Brewing Justice to report his findings. Jaffee says families
that joined Fair Trade were more food secure when the market price of
coffee fell:


“That is, they have food shortages much less of the time. They have
significantly greater access to animal protein, foods like milk and
meat and cheese in their diet. And they’re essentially able to feed
their children much more of the time than their neighbors, who were
really, at the time the coffee prices were at their low point at the
time I was doing my research in 2001, 2002, 2003, who were definitely
showing signs of malnutrition and there was a significant problem with malnutrition
in these communities.”


Fair Trade is still only a small fraction of the coffee market, but
its share of customers is growing, and the big players are taking
notice. Nestle is marketing Fair Trade products in the UK, and you can
find the Fair Trade seal at your neighborhood Starbucks. Only 3.7%
of Starbucks coffee is Fair Trade certified, but Jaffee says
that small percentage still makes Starbucks the single largest buyer of
Fair Trade coffee in the US.


Smaller coffee shop owners, such as Linda Smithers, also
buys some Fair Trade coffee. But Smithers doesn’t think guaranteeing a
specific price is the best way to encourage farms to grow the best
coffee:


“You’re given a price regardless of the quality. I have a problem
with that. I do not think that’s a sustainable agricultural model.
Remember, I’m a coffee person. I’m not a cause person, I’m
a coffee person. And to me, sustainable is: the product must be
outstanding and have good sociological and ecological practices, then
get a fair price.”


Smithers believes farms that treat workers and the environment well
naturally have the best tasting coffee and will always get a fair
price in the specialty coffee market.


Some conservative economists agree with her. They say the Fair Trade movement
will only continue to grow if looks beyond the socially-conscious crowd and continues
to improve the taste and consistency. That’s what people eyeing those gourmet coffee beans
want.


Smithers says Fair Trade has already been a success in that it’s put
issues of working conditions and the environment on the table…
and she could sit and drink a cup and talk about that for hours.


For the Environment Report, I’m Julie Grant.

Related Links

Reusing Spent Nuclear Fuel

  • According to the government, GNEP is an evolving U.S. global nuclear strategy aimed at reducing global dependence on fossil fuels; providing reliable, abundant energy necessary for economic growth, prosperity and health; utilizing international expertise to advance technologies and safeguards; and reducing the risk of nuclear proliferation. (Photo courtesy Idaho National Laboratory)

A U.S. Department of Energy initiative to reprocess spent nuclear
reactor fuel is trying to find a home for a facility. Fred Kight
reports the Bush administration says the plan is a means to safely
expand nuclear energy. Critics of the initiative say it’s unsafe and
unwise:

Transcript

A U.S. Department of Energy initiative to reprocess spent nuclear
reactor fuel is trying to find a home for a facility. Fred Kight
reports the Bush administration says the plan is a means to safely
expand nuclear energy. Critics of the initiative say it’s unsafe and
unwise:


The Global Nuclear Energy Partnership, or GNEP, would collect spent
nuclear rods from reactors and process them for re-use in the U.S. and
other countries.


Supporters, such as Henry Spitz of the University of Cincinnati, say the
program will allow more reliance on nuclear energy while reducing the
amount of waste generated by power plants:


“GNEP is an essential program if the U.S. is to become less dependent upon
foreign sources of energy.”


But opponents, such as Linda Buskin Jergens, say a facility to reprocess
spent nuclear fuel could make it easier to obtain plutonium for nuclear
weapons:


“Are we creating here a target for terrorism?”


The Department of Energy is studying 11 sites across the nation for the
reprocessing plant.


For the Environment Report, I’m Fred Kight.

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