Category Archives: Energy

Electricity Savings

Surprise: Not-so-glamorous conservation works best

When high school science teacher Ray Janke bought a home in Chicopee, Mass., he decided to see how much he could save on his electric bill.

He exchanged incandescent bulbs for compact fluorescents, put switches and surge protectors on his electronic equipment to reduce the “phantom load” – the trickle consumption even when electronic equipment is off – and bought energy-efficient appliances.

Two things happened: He saw a two-thirds reduction in his electric bill, and he found himself under audit by Mass Electric. The company thought he’d tampered with his meter. “They couldn’t believe I was using so little,” he says.
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Cutting back on electricity used for lighting (9 percent of residential usage nationwide) presents the quickest savings-to-effort ratio. The EPA estimates that changing only 25 percent of your home’s bulbs can cut a lighting bill in half. Incandescent bulbs waste 90 percent of their energy as heat, and compact fluorescents, which can be up to five times more efficient, last years longer as well.

I am far from doing everything I could, but at least I have installed compact fluorescent light bulbs as old ones burned out. Actually I don’t think I have changed a light bulb in several years (another benefit of these energy efficient lights is they last a long time).

Green Energy

In Ontario, Making ‘Clean Energy’ Pay

Canada’s Ontario province has ordered local utility companies to pay homeowners or businesses for any electricity they generate from small solar, wind, water or other renewable energy projects, beginning next month.

The plan is unique in North America, but it is modeled after similar schemes in Europe that have spawned a boom in small “clean energy” projects.

One more example of green energy projects. Those planning for the future can see that such efforts are needed. And my guess is that those that develop solutions now will be rewarded in the marketplace. Europe and Japan are taking the lead in energy technology and as renewable energy (and energy saving technology) become more and more important those companies that have built up a expertise will benefit.

Engineers Save Energy

Dr. Rosenfield - Fermi Award Winner

Arthur Rosenfeld the 2005 Enrico Fermi Award Winner which is the “government’s oldest award for scientific achievement” according to the Department of Energy. I question that, and on another page they say “one of the oldest…”

“Dr. Rosenfeld is one of the ‘founding fathers’ of energy efficiency, and the legacy of his research and policy work is an entire new energy efficiency sector of our economy, which now yields an astounding annual savings of around $100 billion, and growing.”
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Rosenfeld received his Ph.D. at the University of Chicago in 1954 and was Nobel Laureate Enrico Fermi’s last graduate student.
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In 1973, when OPEC embargoed oil sales to the West, Dr. Rosenfeld redirected his career. He recognized the potential for energy savings in the building sector, which uses one third of U.S. primary energy and two-thirds of our electricity. In 1975, he founded a program which grew into the Center for Building Science at DOE’s Lawrence Berkeley National Laboratory.
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The U.S. National Research Council (NRC) has estimated that energy efficiency improvements developed solely at DOE’s National Laboratories, saved the U.S. $30 billion between 1978 and 2000

Great stuff. Another great example of how much good scientists and engineers can do. And also a good reminder of the economic benefits that are less obvious – such as increasing energy efficiency.

Turning Trash into Electricity

Florida county plans to vaporize landfill trash:

The $425 million facility expected to be built in St. Lucie County will use lightning-like plasma arcs to turn trash into gas and rock-like material. It will be the first such plant in the nation operating on such a massive scale and the largest in the world.

Supporters say the process is cleaner than traditional trash incineration, though skeptics question whether the technology can meet the lofty expectations.

The 100,000-square-foot plant, slated to be operational in two years, is expected to vaporize 3,000 tons of garbage a day. County officials estimate their entire landfill — 4.3 million tons of trash collected since 1978 — will be gone in 18 years.

No byproduct will go unused, according to Geoplasma, the Atlanta-based company building and paying for the plant.

Synthetic, combustible gas produced in the process will be used to run turbines to create about 120 megawatts of electricity that will be sold back to the grid. The facility will operate on about a third of the power it generates, free from outside electricity.

Wind-Powered Water Heater

University Students Build Wind-Powered Water Heater by Gregg Kleiner:

A team of engineering students from Oregon State University, inspired by a late professor’s rudimentary sketches, has designed a working prototype of a hot water heating system powered solely by the wind.

The students believe the technology, which uses magnets, a copper plate and plenty of ingenuity, has the potential to birth a new company and ultimately make an impact on the way the world heats water, especially in developing countries.
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The prototype was the team’s senior design project, a year-long, hands-on engineering course at OSU that all senior engineering students must participate in, choosing an idea or basic design and developing it to the prototype stage. Despite having no funding, the students say the concept has now been proven to work, and several team members considered spinning off a nonprofit company that would bring the technology to developing countries.

Ocean Power Plant

Interest in ocean power resurges by Dennis Camire via A new wave of interest in ocean power:

Ocean thermal power plants, which generate electricity from the temperature difference between the tropics’ warm surface water and deep cold water, could be built on land in several hundred areas around the globe’s equatorial zones and also could be constructed as floating plants.
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A recent Electric Power Research Institute study found sites in Maine, Alaska, California and Washington that had good potential for tidal power generation with production costs ranging from 4.2 cents per kilowatt hour to 10.8 cents. By comparison, the average retail cost of electricity to U.S. consumers in May was 8.64 cents per kilowatt hour.

Wind Power

Wind Power graph

Graph of wind power capacity in the USA from 1981 – 2005 (from 10 Megawatts to 9,149 megawatts).

From the American Wind Energy Association:

The only other countries around the world that have more wind power installed are Germany (19,140 MW as of the end of June), and Spain (10,728 MW).

AWEA expects the U.S. to pass the 15,000 MW mark by the end of 2007 and can have 25,000 MW installed by the end of 2010, with the proper policies in place. At this growth rate, the U.S. could have 100,000 MW installed by 2020, which would provide the nation with approximately 6% of its future power needs, about as much as hydropower provides today.

Electricity from Bacteria and Wastewater

Researchers harness the power of bacteria by Renee Meiller

In nature, says McMahon, photosynthetic bacteria effectively extract energy from their food — and microbial fuel cells capitalize on that efficiency. “By having the microbes strip the electrons out of the organic waste, and turning that into electricity, then we can make a process of conversion more efficient,” she says. “And they’re very good at doing that-much better than we are with our high-tech extraction methods.”

Through machinery such as plants, photosynthetic bacteria harvest solar energy. They also make products to power microbial fuel cells. “In many ways, this is the best of both worlds — generating electricity from a ‘free’ energy source like sunlight and removing wastes at the same time,” says Donohue. “The trick is to bring ideas from different disciplines to develop biorefineries and fuel cells that take advantage of the capabilities of photosynthetic bacteria.”

The benefit of using photosynthetic bacteria, he says, is that solar-powered microbial fuel cells can generate additional electricity when sunlight is available.

MIT’s Energy ‘Manhattan Project’

MIT’s Energy ‘Manhattan Project’ by Mark Anderson:

David Jhirad, a former deputy assistant secretary of energy and current VP for science and research at the World Resources Institute, said no other institution or government anywhere has taken on such an intensive, creative, broad-based, and wide-ranging energy research initiative.
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Many of these projects are ongoing and will continue under the Energy Research Council banner. Others, such as a new effort to make cheap ethanol using a biochemical technique called metabolic engineering, apply the expertise of faculty and staff who had never worked on energy problems before.

The council will also hire faculty in fields, such as optimizing energy distribution and transmission, if it finds MIT hasn’t devoted enough resources to them.

Susan Hockfield, Inaugural Address, 16th President of the Massachusetts Institute of Technology:
Continue reading →

Solar Tower Power Generation

How Australia got hot for solar power

In Australia Enviromission looking to build a 1,600-foot tall “solar tower” that can power 100,000 homes.

The tower will be over there,” Davey says, pointing to a spot a mile distant where a 1,600-foot structure will rise from the ocher-colored earth. Picture a 260-foot-diameter cylinder taller than the Sears Tower encircled by a two-mile-diameter transparent canopy at ground level. About 8 feet tall at the perimeter, where Davey has his feet planted, the solar collector will gradually slope up to a height of 50 to 60 feet at the tower’s base.

Acting as a giant greenhouse, the solar collector will superheat the air with radiation from the sun. Hot air rises, naturally, and the tower will operate as a giant vacuum. As the air is sucked into the tower, it will produce wind to power an array of turbine generators clustered around the structure.

The result: enough clean, green electricity to power some 100,000 homes without producing a particle of pollution or a wisp of planet-warming gases.

View Discovery Channel segment on EnviroMission