Geothermal at Home

  • Swimmers in Iceland enjoy the toasty Blue Lagoon hot springs. (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.


(Sound of hammers in Community Center)


For the Environment Report, I’m Robbie Harris.

Related Links

Big City Mayor Pushes “Green” Building

  • Having a plaque like this on the outside of a building means that the construction, materials, and utilities of the building are eco-friendly. "Green" building has started to increase in popularity. (Photo courtesy of the U.S. Green Building Council)

Buildings consume 70 percent of the electricity and create
most of the landfill waste in the U.S. Some cities are looking at “green building” methods to lessen the burden on the environment. The mayor of one major city has set “green” standards for all new buildings, using a mix of mandates and incentives. The Great Lakes Radio Consortium’s Robbie Harris reports on the economic tug of war over building green:

Transcript

Buildings consume 70% of the electricity and create most of the landfill waste in the U.S. Some cities are looking at “green building“ methods to lessen the burden on the environment. The mayor of one major city has set “green” standards for all new buildings, using a mix of mandates and incentives. Robbie Harris reports on the economic tug of war over building green.


(sound of PA system)


Last year, the first green police station opened in Chicago. It will use 20% less energy, and 30% less water than a typical police station. It’s built of recycled and locally available materials. But it looks pretty much like the other newer police stations you see around the city. Officer Jeffrey Bella who has worked here since it opened, says most people have no idea this is what’s known as a “high performance green building.”


“…and the fact that nobody talks about it and nobody notices it is pretty much a testament to how well it does work.”


This is the first police station in the country to earn a LEED Silver rating from the US green building council. LEED – that’s L-E–E-D- for Leadership in Energy and Environmental Design, is a rating system that awards points for features such as energy conservation, site usage, indoor air quality, light pollution reduction, even proximity to public transit. Levels range from basic certification to silver, gold and platinum.


Last spring, Chicago Mayor Richard Daley announced every new building built by the city, must meet basic LEED standards. Private developers aren’t required to meet LEED standards but they must meet the less stringent city Energy conservation code.


Even that has the development community concerned about higher costs. The Mayor had this to say at the Building and Design conference in February.


“Here in the city of Chicago we have to really educate architects, and engineers and I mean you talk about challenges, that alone – and contractors- because they look at money. Money is the source of their profession, like any other profession. How much money… developers, engineers, archiects, contractors, and subcontractors …so green technology to them means money, it doesn’t mean the technology that maybe you and I think about.”


Even the mayor wouldn’t dispute that most LEED certified construction costs more up front. Washington D.C. economist Greg Kats puts it at roughly 2 percent more. Kats ran a performance study of 40 LEED-certified buildings around the country and found higher initial costs were offset ten fold by a variety of benefits.


“And those benefits pay back very quickly in the form of lower energy costs, lower water costs lower operations and maintenance costs, better building operations. And frankly, people are more happy, they’re more productive, kids’ test scores go up, asthma and allergy problem, which is a real concern for a lot of parents like me, tend to go away in green builings.”


On February 14th, one of the city’ largest real estate firms, LR Developers broke ground on what will be the first LEED-certified luxury high rise in Chicago. LR’s Kerry Dixon says, they built green to differentiate themselves in the luxury condo market, and although they’re not required to be LEED certified, they knew it would please the Mayor. But Dixon says it hasn’t exactly been an important selling point.


“We’re not getting feedback from the marketing and sales staff that yeah, everbody’s interested in it.”


If most condo-buyers are not showing much interest in green buildings, more and more large corporations that want to project greener images are.


“We are one of the nation’s largest energy producers. We are by far the nation’s larger operator of nuclear power plants. Some love us for that, and some are skeptical because of that.”


John Rowe is the CEO and chairman of Exelon. The company is looking to consolidate 3 corporate offices into one location and Rowe was fascinated with the idea of building a new green headquarters.


“But it basically worked out so that it would probably be cheaper. And that if we worked on being green we could probably get just as much credit for using an existing building as a new one.”


That’s because the U.S. Green Building Council also certifies commercial interiors. When it’s finished in 2007 Rowe is confident Exelon’s new corporate headquarters will qualify for LEED’s silver rating. He’s hoping it even makes gold.


For now, the Daley administration has chosen to LEED by example – and hope the private sector follows.


For the GLRC, I’m Robbie Harris.

Related Links

Solar Houses Power Up the Grid

  • Some people are reversing the spin of their electric meters by selling their excess energy back to the power grid.

Most people think of houses as buildings that consume energy, but homeowners who generate their own electricity from rooftop solar panels are finding they often make more than they need. Some have begun selling their excess energy back to the utility… which puts it on the power grid for others to use. The Great Lakes Radio Consortium’s Robbie Harris has this report:

To see your state’s policies regarding ‘net metering’ click here:

Transcript

Most people think of houses as buildings that consume energy. But home-owners who generate their own electricity from rooftop solar panels, are finding they often make more than they need. Some have begun selling their excess energy back to the utility… which puts it on the power grid for others to use. The Great Lakes Radio Consortium’s Robbie Harris has this report:


(natural sound)


Marjie Isaacson’s one hundred twenty year old, brick four flat is wedged onto a typical Chicago city lot… From the street, the only thing that distinguishes her property from her neighbors, is the bright blue recycling bin, at the front gate… What you can’t see from the street is an array of twelve, 4 by 6 foot solar panels on the roof. A bank of batteries in the basement allows Isaacson to store enough electricity to power her house for four days.


“Here’s my messy basement.”


(laughs)


A huge wall full of batteries like this, used to be the only way to
store solar energy, but Marjie Isaacson
is taking part in an experimental
energy project.


“And how it works is.. When I’m producing energy from my solar panels it goes into the grid and gets mixed up with everyone else’s energy.. But Com Ed is keeping track of that for me.. And at the end of the year if I’ve used
more than I’ve given them, I don’t get any money. But if I’ve given them more than I use them, I get money.”


“And how’s that equation working?”


“I got money.”


“Can I ask how much?”


“Umm… I got 200 dollars.”


Com Ed, the Chicago utility company,
calls this its “Wind and Photovoltaic
Generation Pricing Experiment.” About
half the states in the country are experimenting
with something similar. Homeowners purchase
their own solar panels. Then the utility gives
them something called an inter-tie. The inter-tie
feeds their excess electricity to the power grid.
So the grid itself, effectively becomes the
home-owner’s battery back -up. On
cloudy days if someone’s system is
not generating enough power, the electrical
grid will supply it. When solar powered
houses produce an excess, Com Ed
will buy it from the homeowner. This
experiment has been going on for
three years. So far, fewer than 20
houses in Chicago have signed on to
the program.


“It’s a number that’s small that we’re
hoping to increase. It’s a hard sell in
the Midwest. Folks don’t think that
solar is as viable here as it is in
Florida or in California.”


Mary O’Toole is an Environmental
Strategist who oversees the alternative
energy experiment for Com Ed. She
gets a lot of phone calls from interested
homeowners… but when they hear it
costs anywhere from 10,000 dollars
on up to put a solar array on your roof,
that’s where the conversations end.


“I think most folks look at the cost of
solar or photovoltaic and say, “Oh!
I’ll wait for the price to drop.” Where
right now in Illinois we’ve got the ability
to cut the price in half for you… and
that’s… that’s huge.”


The state of Illinois has one of the
best incentive packages in the country
for offsetting the cost of installing
alternative energy systems. It offers
grants and rebates up to 60 percent.
But even with that price break, it still
takes 30 years or more for a solar energy
system to pay for itself. For most
homeowners, that’s way too long.
In this mobile society, it’s longer than
most people stay in their houses.


“We are in a society where nobody
cares for the future.”


Vladimir Nekola is an electrical
engineer who installs solar power
systems. He came to the U.S. twelve
years ago from Argentina. Nekola
longs for the day when he can tell
clients their payback will come in five
years. He points to other nations like
Japan and Germany which provide
homeowners with solar panels – and
allow them to pay off the high startup
costs over time. German utility
companies also encourage their
clients to participate in programs like
this by paying them far more than
Com Ed does for energy.


But the cost of conventional energy
is much higher in other countries
than it is in the US. Vladimir Nekola
says one of the things holding back
progress in alternative energy here
is that power is still relatively cheap.


“In my country, in Argentina,
everybody turns off the switch
because electricity is expensive. But here
it’s so cheap – we don’t care – we live
twenty four hours a day with the lights
on all the time… heating, air conditioner… it’s a luxury.”


Nekola believes most Americans
are just not thinking about alternative
energy. While he installed quite a few
solar energy systems around the
Y2K scare at the turn of the century…
he hasn’t done any in the last two
years. The few clients he is
working with are people who don’t
even have to think about price. To put
a solar array on your house, it seems,
you either have to be rich… crazy… or
fancy yourself an environmentalist.
Marjie Isaacson considers herself
the latter.


“I haven’t regretted it a day since I put
it in. It’s just been a source of
immense satisfaction to me.”


Marjie will tell you she was willing to
foot the bill for a solar power system –
the way other people might choose to
buy a new car – or some other
quasi-useful luxury.


“For me it was discretionary income.
I could have bought a fur coat.. but the
point is that if I had a fur coat or
fancy car no one would think I was
eccentric. But with this people seem
to think that it’s a little odd.”


In her dreams, Marjie envisions the
million solar rooftops former
President Bill Clinton spoke
about.. .. all generating energy
back to the grid.. and maybe, just
maybe, precluding the need for
another conventional energy power
plant.


Power industry officials say we’re
still a long way from that. But Marjie
Isaacson insists that it has to start
somewhere… and why not with her.


“People keep saying when we get
enough people getting these, the
solar panels are gonna start getting
cheaper.. so somebody has to start
buying them and I felt a responsibility
to put my money where my mouth
was.”


For the Great Lakes Radio
Consortium, I’m Robbie Harris.