"Power house mechanic working on steam pump" By Lewis Hine, 1920 (Photo courtesy of the National Archives and Records Administration, Records of the Work Projects Administration)
Steam plants haven’t been en vogue since Thomas Edison’s day. But now, they’re back in the spotlight thanks to the Obama administration. The Department of Energy just got 106-million dollars worth of stimulus money to fund steam-related projects. Jennifer Guerra takes us back to the future:
Transcript
Steam plants haven’t been en vogue since Thomas Edison’s day. But now, they’re back in the spotlight thanks to the Obama administration. The Department of Energy just got 106-million dollars worth of stimulus money to fund steam-related projects. Jennifer Guerra takes us back to the future:
(sound of steam)
You hear that? That’s the sound of efficiency.
It’s what you get when you combine steam pipes with a giant jet engine.
These steam systems are called combined heat and power, or CHP, and the government wants to see more of them.
Getting energy from coal-burning power plants isn’t very efficient. Most CHP systems, on the other hand, use natural gas and are more than 80% efficient.
The DOE says that’s like taking 45 million cars off the road.
Neal Elliot is with the American Council for an Energy-Efficient Economy.
“So whether you’re concerned about local air quality or whether you’re talking about global climate change gasses, the more efficient the system, the lower the emissions.”
And if you’re worried about seeing a giant CHP plant pop up in your backyard – don’t worry, most CHP systems are underground.
Swimmers in Iceland enjoy the toasty Blue Lagoon hot springs. (Photo by Kurt Holtz)
Steam rising from the Blue Lagoon. (Photo by Kurt Holtz)
Nesjavillir Power Plant steam vents, Iceland. (Photo by Kurt Holtz)
Nesjavillir Geothermal Plant, Iceland. (Photo by Kurt Holtz)
Non-toxic steam rises over Nesjavillir Power plant which produces
geothermal hot water for all of Reykjavik, Iceland. (Photo by Kurt Holtz)
Reporter Robbie Harris with Hans Bennimidgel, Nesjavillir Geothermal Plant Spokesman. (Photo by Kurt Holtz)
You might be hearing about geothermal energy more and more. But what exactly is geothermal energy? The new federal Energy Act calls for more research and investment into the alternative energy source. Robbie Harris has more on this long used, but little known technology, for tapping the earth’s heat:
Transcript
You might be hearing about geothermal energy more and more. But what exactly is geothermal energy? The new federal Energy Act calls for more research and investment into the alternative energy source. Robbie Harris has more on this long used, but little known technology, for tapping the earth’s heat:
(“Now look at that!” “Wow!”)
(whooshing of geyser)
In Iceland, where geysers gush from the ground and steam rises from the bays, geothermal is the number one source of energy. This island nation in the north Atlantic burns virtually no fossil fuel to heat or cool its buildings.
“You will probably not see a building that is not heated by geothermal
energy during your visit here.”
Pall Valdimarsson is Director of Research and Development with Enix. It’s Iceland’s largest geothermal consulting firm.
“And I myself, I have never lived in a house in Iceland without geothermal
energy, not in my whole life and I am not the youngest one as you can see.”
Valdimarsson says Iceland has used a special technology to tap earth-generated heat since the 1930s. And why not? It’s everywhere on this volcanic island. The first settlers here in the eighth century saw what they called “smoke” rising from the hot springs.
Today, steam blasts from hot water wells at Iceland’s newest, state of the art geothermal plant. The steam spins turbines to make electricity. The superheated water is piped directly into buildings where it gives up its heat. This heat exchange is the core concept behind geothermal technology.
Hans Bennimidgel is a spokesman for the power plant. He says the benefits for Iceland are simple:
“Clean energy and dirt cheap.”
Few places have the hot water resources Iceland has. But according to the Geothermal Resource Council, superheated water is available virtually anywhere in the world, if you drill deep enough.
The U.S. already taps this underground hot water to produce more geothermal electricity than Iceland does. And that’s expected to grow sharply, but for decades Americans have also used a different form of geothermal energy to heat
and cool buildings.
Erik Larson is a vice-president of Indie Energy. He calls it the other geothermal, which is, basically:
“Free heat from the earth and an extremely efficient way to eject heat from
the building in the summer time.”
Larson says geothermal, or geo-exchange systems, are comparable to traditional
heating, ventilation and cooling systems. But they use the earth’s constant underground temperature — around 55 degrees in most of the U.S. — to take the edge off a building’s heating and cooling load:
“Geothermal heat pump technology like we’re talking about can be done
anywhere in the country. Anywhere where there is ground to drill we can
put in our closed loop wells to draw heat from the earth to provide an HVAC
system.”
For a long time in rural areas, large horizontal loops several feet
underground captured and released heat. But in urban areas, there wasn’t
enough land. Now Larson says Indie Energy uses a new drilling technique
known as a vertical closed loop system. He says they can be installed under
almost any building. Pipes inside wells hold a fluid, which continuously
circulates between the ground and the building — creating a heat exchange.
Larson says a geothermal system saves owners money:
“We are a system that you would fully own through the ground loops or these
wells that we put in…through the distribution which is basically happening
within your building. So it adds value to your property, you control it and you
take advantage of all the savings.”
Larson says geothermal systems for buildings cost anywhere from 50 to 100 percent more than a typical heating, cooling, and ventilation system. But he says, most pay for themselves in five to eight years with the energy savings.
Business is booming. Larson says Indie Energy plans to expand in two new locations this year. Four months ago, they installed a large geothermal system at Boocoo Community Center in Evanston, Illinois. During the installation, they helped train new workers in geothermal technology. It was a joint project between Indie Energy and Boocoo. They’re training workers for a new green industry they hope will not only save resources, but create new jobs.
Exposed to toxic chemicals such as lead and mercury, workers stay at the scrap yards for the $130-a-month pay. (photo by Ted Land)
Copper wire is stripped, circuit boards melted and other parts burned to retrieve metal from old electronic equipment in illegal scrap yards in China. (Photo by Ted Land)
Although China banned electronic waste, illegal operations still take American E-waste to retrieve precious metals and some throw the leftovers into the river. (Photo by Ted Land)
Many workers say this is better than family scrap yards where American e-waste fuels toxic fires across the countryside. (photo by Ted Land)
Like many large electronic equipment buyers, the State of Illinois was surprised to find its old equipment was being shipped overseas to scrap yards. (Photo by Ted Land)
High school students test the water for pollutants. They take their results to government officials who have little power to stop the e-waste imports. (photo by Ted Land)
At your home, chances are your TV, computer and other electronic gear were made
overseas. That’s because it’s cheaper to make them there. And it’s cheaper to get rid of old
electronics overseas. Someday, your old cell phone or CD player might end up right back
where it started: in China. Ted Land visited a Chinese city where electronic waste, or e-waste, is shipped by the thousands of tons. Pollution from that waste is threatening the
health of people who live there:
Transcript
At your home, chances are your TV, computer and other electronic gear were made
overseas. That’s because it’s cheaper to make them there. And it’s cheaper to get rid of old
electronics overseas. Someday, your old cell phone or CD player might end up right back
where it started: in China. Ted Land visited a Chinese city where electronic waste , or e-
waste, is shipped by the thousands of tons. Pollution from that waste is threatening the
health of people who live there:
The city of Taizhou is in eastern China. It’s an industrial port city. A lot of the people
who travel here are here on business. Ships loaded with new products are often headed
for the United States. But it’s not just what leaves this city that makes business boom…
it’s also what’s coming in:
“I know it’s polluted here but it’s not a big deal. The most important thing is my
children, that’s the reason why I found work here.”
Liu Qinzhen works at this Taizhou scrap plant. It’s the final stop for some of the nearly
4,000 tons of scrap and e-waste that enters the port each day. Liu is one of hundreds of
workers who squat under an outdoor pavilion picking apart old circuit boards and wires.
She works 9 hours a day, 7 days a week, earning about 130 dollars a month.
The work is dangerous. She and the other workers are exposed to harmful chemicals
from e-waste such as lead and mercury. The 23-year-old moved here for this job because
she needed to support her two kids:
“I used to work in a shoe factory but then I had a baby and it’s not convenient to have a
baby there so I moved here even though the pay is the same. I come from the countryside.
You can’t earn money on a farm.”
The plant where she works is considered safer than scrapping these materials in the
countryside where families work in their front yards and in their homes. They melt
circuit boards and burn wires to extract bits of valuable copper and gold.
Environmental organizations have documented evidence that what’s left over after the
valuable metals are retrieved is dumped into local rivers and streams:
(Land:) “I noticed when we arrived they shut down the other door of that other shop?
“They are doing the same kind of e-waste, but they are afraid of being discovered by
others.”
Afraid, says Taizhou resident Chen Yijun because what they’re doing is illegal. Chinese
law forbids the import of e-waste, yet piles of foreign electronics litter the countryside
and pour into scrap plants daily.
Yijun is a teacher at Taizhou #1 High School, where students are concerned about what
the e-waste industry is doing to their environment. They’ve been testing the water in
local streams, looking for signs of harmful chemicals:
On this day they draw several gallons from a stream. The banks are littered with piles of
electrical cable. Chen Zhengyan has been working on the project for years:
“The frogs here are different from frogs in other places because sometimes they have
extra limbs. We are sure the pollution is from e-waste because in this area there is no
other industry.”
Chen and her colleagues say this pollution is harmful to people, too. They tell local
government officials such as Liang Xiaoyong that something has to be done to improve
the situation. But, Liang says there’s only so much the government can do to combat an
illegal industry that so many residents make their living off of. He says cutting off the
imports is difficult because sometimes e-waste is hidden in with other scrap. He doesn’t
deny the waste industry is a big business here:
This industry generates a lot of tax money for us in the form of tariffs. So, if this industry
doesn’t exist, the Taizhou harbor won’t survive.
Jim Puckett is coordinator of the Basel Action Network, a Seattle based group that
confronts toxic trade issues around the world. He says it’s not that the Chinese
government is unwilling to stop imports, it’s simply unable to stop them.
“They’ve banned the import, the problem is they can’t control that flow, it’s just coming at
them container load after container load through various ports and they can’t possibly check every
single one.”
American waste is literally fueling the fires burning electronics that dot the countryside in
China. And many of the original owners of this gear had taken it to be recycled, and
thought they’d done the right thing. But, often it ends up on a ship, headed for scrap
yards overseas.
About seven thousand miles away from Taizhou, practically the other side of the globe,
there’s a warehouse in Springfield, Illinois stacked with old electronic gear.
The Illinois State Department of Central Management Services, or CMS, disposes of old
state property, including old copy machines, computers, and monitors. In 2005, CMS
was contacted by the Basel Action Network with some disturbing information. The
group was finding State of Illinois computers dumped in developing countries around the
world. Curtis Howard is manager of CMS state and federal surplus property:
“It hit me pretty hard, the fact that, not realizing, you know I always look at it, these guys
were here, they come in, they bid on our property, you know I’m maximizing the return on
the state’s investment, I’m doing a good job, I never really thought about the tail end of
the dragon.”
Basel Action Network coordinator Jim Puckett says if the Chinese are unable to stop the
imports, then it’s up to the United States to control what they export:
Other countries have laws forbidding it, laws controlling it, but in the United States, we
don’t even have a law to control this export.
The U.S. is one of only a handful of countries that have not signed and ratified the Basel
Convention, an international treaty that bans hazardous waste exports. That means if
anything is going to be done to stop electronic waste from polluting countries overseas,
it’s going to be up to the States to take action.
It starts with buying electronics from companies that make products that are more easily
recycled, and ends with making sure old electronic gear is getting into the hands of
responsible recyclers who don’t simply ship the e-waste to scrap yards overseas.
The Sappi paper mill in Cloquet Minnesota produces most of the electricity it needs, using steam that also powers the industrial process. Sappi can even sell power when demand is high. Electric co-generation is enjoying a come-back. (Photo by Stephanie Hemphill)
Keith Matzdorf and Rick Morgan maintain three electric generators at the Sappi paper mill. This one burns byproducts of the paper-making process, and returns steam to the process while making electricity. The equipment is from Czechoslovakia and Sweden. (Photo by Stephanie Hemphill)
More and mores states are establishing a “renewable energy standard”
for their electric utilities. So far, wind power is producing the bulk
of renewable energy. But there are other sources. Some are brand new.
Others have been around for a long time. Stephanie Hemphill reports:
Transcript
More and mores states are establishing a “renewable energy standard”
for their electric utilities. So far, wind power is producing the bulk
of renewable energy. But there are other sources. Some are brand new.
Others have been around for a long time. Stephanie Hemphill reports:
The first thing to know about electricity is that making it can be
incredibly inefficient.
In a conventional power plant, burning fuel turns water into steam.
The steam drives a turbine, which spins the generator. Only about a
third of the energy in the original fuel is converted to electricity.
Two thirds goes up the smokestack in the form of heat.
“Every time you convert energy from one form to another, you lose
something. That’s just the way it is, ’cause nothing’s perfect.”
Dwight Anderson works for Minnesota Power. He’s lived with that
inefficiency for his whole working life. Now, he’s trying to wring
more electric power out of every bit of fuel.
He’s high on something called co-generation. The basic idea is to
harness the heat or steam that normally goes up the smokestack.
There’s a good example of co-generation at the Sappi paper mill in
Cloquet, in northern Minnesota. Like many paper mills, Sappi makes
most of the electricity it needs.
Engineering Manager Rick Morgan points to a mountain of wood chips:
“We have about 20,000 tons of biomass stored.”
That’ll last less than a month. The plant uses 53,000 watts, enough to
power a small city.
Inside the sprawling buildings, there are several electric generators.
One of them is fueled by a recovery boiler, which burns the byproducts
of the paper-making process, to run steam through a turbine.
“…The actual turbine is manufactured in Czechoslovakia and the generator’s
made in Vestros, Sweden.”
Higher pressure steam spins the turbine to produce electricity. The
waste steam from the same boiler goes to the pulp dryer, the paper
machines, and other parts of the process.
Back in his office, Rick Morgan says energy is the fourth largest
expense for paper mills:
“If you can’t control energy costs in this business, you can’t be in
business.”
The main product here is paper, but sometimes Sappi sells electricity
too. That happened during a recent cold snap:
“The electric demand increases and the costs go higher and higher, to
the point that it’s financially feasible for us to generate power for
Minnesota Power.”
Opportunities to produce electricity turn up in some surprising places.
Like along natural gas pipelines. The pressure has to be boosted
periodically as the gas travels through the pipe. Compressors fueled
by the natural gas do that work, and normally they vent off waste heat.
But now in South Dakota, the waste heat is fueling small power plants.
They look like the barns and silos of a farm. The generator itself is
about the size of a truck.
Basin Electric Power Coop spokesman Daryl Hill says the plants are
owned and operated by an Israeli company, and the co-op buys the power:
“We get basically 22 megawatts of baseload for little investment.”
Other countries are leading in these approaches because their fuel
prices have been so high. As prices go up in the U.S., power producers
are finding ways to use more efficient technologies, and they’re
returning to old-fashioned ideas like combined heat and power. This is
a form of co-generation that was once common across the country.
A central electric plant uses its waste steam to heat buildings. Of
course, most people don’t want to live next to a coal-fired power
plant. But Neal Elliott, with the American Council for an Energy-
Efficient Economy, says with combined heat and power, cleaner fuels,
like natural gas, can become competitive:
“Use natural gas, but use it much more efficiently. And instead of
throwing more than half of the fuel value away, let’s do it with co-
gen.”
Elliott says combined heat and power and other forms of co-generation
could provide 20% of America’s electricity needs, and save on heating
fuel at the same time. And he says recovered energy generation like
along the natural gas pipelines could provide another 20%.
For the Environment Report, I’m Stephanie Hemphill.
Ford Motor Company installs a permanent Fumes to Fuel system at Michigan Truck Plant after a successful pilot program at the Ford Rouge Center last year. (Photo courtesy of Ford Motor Company)
Another look at the Fumes to Fuel system at Michigan Truck Plant. (Photo courtesy of Ford Motor Company)
Pollution from factories and other places might be dollars just going up in smoke. But a promising new technology turns these ordinarily troublesome waste products into something that’s especially valuable these days: cheap electricity. The Great Lakes Radio Consortium’s Julie Halpert has this
report:
Transcript
Pollution from factories and other places might be dollars just going up
in smoke, but a promising new technology turns these ordinarily
troublesome waste products into something that’s especially valuable
these days: cheap electricity. The Great Lakes Radio Consortium’s Julie
Halpert has this report:
Remember the children’s story, where Rumpelstiltskin was able to take
straw, a cheap, abundant material, and magically transform it into
precious gold? Well, these days, cheap energy is like gold, and one
company has found a way to similarly generate power from pollution.
(Sound of engine running)
To see how it works, I’m standing on a roof sixty-five feet above the
ground. This is where Ford Motor Company maintains its pollution
control equipment. There are rectangular gray metal boxes as tall as I am
all over the roof, so many that we can barely walk between them. Under
the roof, they’re painting trucks. The paint emits vapors that Ford is now
capturing with these big boxes of machinery.
Mark Wherrett is Ford’s principal environmental engineer.
“We’re here at the Ford Motor Company Michigan truck plant, where the
paint solvent is collected from the process and used as a fuel to make
electricity in a Stirling Engine.”
The Stirling Engine is key. Here’s how it works. Ford’s using an engine
developed by STM Power. STM is using an old engine style called a
Stirling Engine that was once used in place of a steam engine. Instead of
using coal or wood to heat up water and make steam, STM burns the
paint fumes to heat up hydrogen and power the engine. The fumes will
generate 55 kilowatts of electricity. That’s enough to power 11 homes.
There’s not as much pollution emitted at the end, since burning can be
adjusted to temperatures where pollutants are reduced. Wherrett says
that for Ford, the technology simply has no downsides.
“The fumes to fuel process takes the environmental emissions and turns
them on their head, so instead of them being a waste product that we
have to dispose of, we can then turn it into a commodity where we can
then use that to make electricity and use that in our plant systems.”
And that means Ford doesn’t have to purchase as much power from the
grid.
Dorrance Noonan is CEO of STM Power, the company that’s redesigned
the old engine. Noonan says Ford is a perfect candidate for this
technology.
“We’re really excited about the Ford project because it offers a
tremendous opportunity to manufacturing companies and large paint
operations, who have large VOC problems that they have to deal with in
very expensive ways.”
The Ford plant is just the beginning for the company. They also plan to
deliver their portable on-site generators to landfills and wastewater
treatment plants. In that situation, methane gas is used as the fuel to
generate electricity. Noonan says his company has a bright future.
“Well, in the next couple of years, we see strong penetration in our two focus
markets, which are the landfill markets in the U.S. and the wastewater
treatment markets in the United States, and then we see that expansion
going outside of the United States to Europe and eventually to Asia.”
There are some skeptics.
Dan Rassler, with the Electric Power Research Institute, says STM’s
technology does have the potential to create viable new sources of
energy, but more companies need to actually start using it before he can
know for sure, and he says that right now the technology is still too
expensive for many companies.
“We’d like to see the capitol costs of these systems be lower than where
they are today.”
Right now, an STM unit costs $65,000. Rassler would like to see overall
costs cut by 10 to 20 percent. He says costs could decrease as more of
these units come on line.
STM CEO Dorrance Noonan says the costs are comparable to competing
on-site generators, and these expenses will be offset by using the free
fuel used to generate electricity that his engines provide. Noonan says
that continuing high natural gas prices will be his technology’s best
friend, as companies strive for ways to reduce energy costs.
Nine cities in the Great Lakes region are teaming up to fight global warming. The Great Lakes Radio Consortium’s Rebecca Williams has more:
Transcript
Nine cities in the Great Lakes region are teaming up to fight global warming. The Great Lakes Radio Consortium’s Rebecca Williams has more:
The cities are banding together for two years to come up with ways to cut down on greenhouse gases and air pollution. Each city is aiming to have local projects in place by the end of the second year.
For example, Chicago’s looking at more energy-efficient streetlights, Toronto wants to use more renewable energy, and Duluth intends to upgrade its steam plant. The project’s organized by the International Council for Local Environmental Initiatives.
Susan Ode is the group’s spokesperson. She says local officials are starting to notice effects of climate change: things like shifts in growing seasons and more unpredictable weather.
“It’s really one thing to understand the damage and the danger, but there has to be an action element or people get paralyzed, and that’s why cities are so important in this: they are taking action.”
Ode says cities across the country have recently stepped up their efforts to cut down on greenhouse gases in response to the U.S. not signing onto the Kyoto Protocol.
David Peterson is president of NaturNorth Technologies. The business is a spinoff from the University of Minnesota-Duluth's Natural Resources Research Institute. It has a patent on a process to extract large quantities of pure betulin, a component of birch bark. (Photo by Stephanie Hemphill)
When extracted and purified, betulin is a crystalline powder. (Photo by Stephanie Hemphill)
Skip Sandman is a traditional healer for the Mille Lacs Band of Ojibwe. He says it's getting harder and harder to find mature birch trees for his medicines. (Photo by Stephanie Hemphill)
A start-up company is banking on birch bark. The papery bark can be used for more than baskets and canoes. It’s used in skin creams, and scientists are studying it for use in treating skin rashes and even cancer. But Native American healers have been using birch bark for years, and some of them are worried about the supply. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:
Transcript
A start-up company is banking on birch bark. The papery bark can be used for more than baskets and canoes. It’s used in skin creams, and scientists are studying it for use in treating skin rashes and even cancer. But Native American healers have been using birch bark for years, and some of them are worried about the supply. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:
Have you ever noticed – walking in the woods – those cylinders of bright white bark, lying on the forest floor? Those are the remains of a birch tree. The inside of the tree rots away quickly, but the bark lasts much longer.
“The birch tree has some incredible defense mechanisms that protect the tree from weather, from rain, from sun, keep the moisture in, keep moisture out.”
David Peterson knows birch trees pretty well. He was a top manager at the Potlatch Paper Mill near Duluth, Minnesota. The plant processes thousands of trees every day, and burns the bark to make steam.
“I always was interested in trying to come with a way of using some of these low value waste streams generated from pulp paper mills and other places, it seemed like such a horrible waste, to take these really interesting compounds and put them in a boiler for boiler fuel.”
Peterson’s new company, NaturNorth Technologies, plans to make something worth a lot more than boiler fuel. The company has patented a process to extract large quantities of a chemical, betulin, that gives birch bark its anti-bacterial and anti-fungal qualities.
Mill workers remove bark from a tree that’s harvested for lumber or paper-making. It’s shredded into pellets, and put through a chemical process that extracts the betulin. It ends up looking something like salt.
“Here’s a sample of betulin, and you can see how bright and white it is. It’s got a chalky feel when you touch it.”
Apparently, what birch bark does for the birch tree, it can also do for human skin – protect it from the assaults of the physical world. Betulin is already used in some creams and cosmetics, but NaturNorth plans to be the first company in the world to market it on a large scale.
The idea of selling lots of betulin from birch bark makes Skip Sandman nervous. He’s a Native American traditional healer for the Mille Lacs Band of Ojibwe. He uses birch bark for medicine. He says it’s a pain-killer and blood-thinner and can be used for intestinal disorders.
“Fortunately, when people use it for medicines and stuff, one small tree does go a long way. But you might have to travel 15, 20 miles to find the right type of tree.”
Sandman says the bigger trees – ten to twelve inches in diameter – have a bigger supply of the properties he uses in medicine. And lately he’s had to go farther to find those big trees. He says that’s because timber companies have cut down so many of the big trees and now they’re working on smaller and smaller trees.
“But you see the logging trucks go by, and they’re just whacking down everything. Well they think it’s only a tree. But when the trees are gone, then what do we do?”
Sandman says in the Ojibwe creation story, each plant and animal promised to help people in some way, and birch trees offered their healing qualities. He says it’s important to use them respectfully, and not for profit, but only to help people. He says he approaches the tree with an offering of tobacco.
“I will put tobacco down and ask and talk to that tree, because it is alive.”
The folks at NaturNorth are hoping to make money from birch trees, but they’re also excited about helping people. David Peterson says he gets letters from people who want some betulin to treat a skin condition.
“When you get those letters, you can’t help but to feel that somebody out there that’s gonna benefit eventually from these compounds, I think it’s quite sobering and humbling.”
NaturNorth has started marketing betulin to cosmetics companies, and scientists are studying betulinic acid for its disease-fighting potential. Peterson says it’ll be several years before NaturNorth generates a profit.
"Power house mechanic working on steam pump" By Lewis Hine, 1920 (Photo courtesy of the National Archives and Records Administration, Records of the Work Projects Administration)
