World’s First Utility-Scale Flywheel Power Plant Gets a Boost

Dream technology for energy storage?

The Department of Energy has announced a $43 million loan guarantee for an advanced energy storage system that works like a dream — if the dreamer is Leonardo DiCaprio’s character, Cobb, from the movie Inception. The system approximates (as best it can in the phenomenological world) the forever-spinning top that was Cobb’s test to tell if he were dreaming or awake.

Inside Beacon Power's 'SuperFly'

The advanced energy storage system in this case is a flywheel, which converts electrical energy into kinetic (spinning) energy, which it then releases, converted back to electricity, as needed. A 20 MW collection of super-efficient flywheels made by the Massachusetts-based Beacon Power Company, will absorb power when there’s excess production on the grid and release it when demand rises again.

The project is under construction in Stephentown, New York, and will provide approximately 10 percent of that state’s regulation capacity, by reducing the need to increase production at existing power plants when demand spikes — without releasing additional CO2 or soot.

Unlike the top in Inception, the Smart Energy 25 flywheel system, would eventually stop spinning without periodic, if small, jolts of electricity. In the physical world, there’s no such thing as a free energy lunch.

But Beacon’s flywheels come tantalizingly close.

The heart of the system is a lightweight rotating rim made from a carbon-fiber composite. The “top” is levitated on magnetic ball bearings in a vacuum, so that friction is nearly eliminated (it’s that qualifier, “nearly,” that separates the flywheel from Cobb’s totem top). Spinning at a rate of 16,000 rpm, the flywheel can supply peak electrical capacity back to the grid nearly instantaneously — with a ramp-up time measured in nanoseconds, unlike traditional power sources.

Early simple flywheel

In addition to smoothing out the larger power grid and increasing usable energy, Beacon’s flywheels could be a boon for renewable energy sources such as wind and solar. Wind-produced energy is at a maximum at night, solar, during the day. The flywheels could efficiently store this intermittent energy and release it when the wind dies down or, in the case of solar, at night, or when clouds lower electrical production.

Engineers at Beacon continue to look for new ways to lower friction and increase efficiency. Someday, they may reduce drag to zero and produce electricity forever without needing anything more than the initial spin that sets the wheel in motion.

In your dreams.

DOE Loans for Clean (maybe), Renewable (or not) Energy

From the Department of Energy, some good news and some bad news for renewable energy advocates.

First, the good news: The DOE released a list today of the dozen projects currently participating in the Department’s energy loan programs. The loans and guarantees total more $19 billion and will “create or save” 50,000 jobs, according to DOE figures. So, what could be bad about that? Nothing, unless you look carefully at the details. (Not that the DOE is trying to mislead anyone — it’s a matter of definitions.)

The Devil is in the Definitions

The Arizona state legislature recently tried to pass a bill that would have defined nuclear power as a “renewable” source of energy, despite federal regulations to the contrary. (I’ve written about the details elsewhere.) No such purposeful dis-information is contained in the information coming from Secretary of Energy Steven Chu’s office. It’s just that Chu, like his boss, defines “clean energy” very narrowly — referring only to sources that emit little or no-CO2.

Shippingport Atomic Power Station

This definition excludes the 2,200 tons of radioactive waste produced annually by the nation’s 104 nuclear power plants. A half century after the first commercial nuclear power plant went on-line (the Shippingport Atomic Power Station in Pennsylvania), there is still no long-term solution for what to do with this dangerous waste.

Still, even the enthusiastically pro-nuclear Secretary of Energy doesn’t claim nuclear is “renewable” since it runs on a fuel supply (uranium) that has to be mined and is finite.

Of the dozen loan recipients, nine are clearly renewable. One (Ford) is a combo — the loan goes “to transform factories…to produce more fuel efficient models,” according to the DOE (pdf file). The increased efficiency comes from a variety of changes, including adding electric vehicles (which can be “renewable” depending on the energy source) and design changes that allow more complete energy capture from combustion — which is a good thing, but doesn’t make it “renewable.”

In addition to the two nuclear power plants (operated by Southern Nuclear), one other project is clearly not renewable — or clean: the construction of a plant in Louisiana to produce activated carbon), used to remove mercury emissions from coal-fired power plants. Reducing mercury pollution is clearly a good thing. The coal industry also needs this technology because new, lower mercury emission standards are going into effect. But, is a project “clean” if it allows coal-fired power plants to continue emitting CO2? The DOE’s definition of “clean energy” is not just narrowly defined, it’s also a moving target.

Follow the Money

The DOE’s $19 billion dollar energy pie can be sliced in different ways. Here’s what that pie looks like based on the opening sentence of the DOE press release on the dozen projects: “The U.S. Department of Energy’s Loan Guarantee Program paves the way for federal support of clean energy projects…”

Chart 1 shows all monies as “Clean Energy” because it assumes DOE’s definition.

CHART 1

Chart 2 divides the DOE money based on renewable vs. non-renewable energy project.

CHART 2

[Note: As of Sunday (March 7), the DOE was unable to say how the $5.9 billion loan to Ford was divided between renewable and non-renewable projects. For that reason, Ford is not included in Chart 2.]

Substituting “renewable” for the ambiguous term “clean” gives a much different picture. Loan guarantees for renewable projects account for just over a third of DOE dollars. It’s instructive to look at a similar chart, with one difference — illustrating how funding for renewable energy stacks up against funding for nuclear power in this DOE program.

Chart 3 divides the DOE money based on renewable vs. nuclear power projects.

CHART 3

The non-renewable portfolio is almost entirely devoted to building twin nuclear power plants in Georgia, operated by Southern Nuclear. Removing the single other project in this category (the facility to produce activated carbon in Louisiana) has no effect on the whole number percentages of the renewable and non-renewable categories in Chart 2.

The point of this exercise is to underscore the importance of precision in discussing energy policy issues. In this debate, the words “clean” and “renewable” are often applied to the word “energy” as if they were synonymous. They aren’t.

Whether or not nuclear power should play a major role in our energy future is an enormously important question — but it’s not addressed here. In the DOE’s loan guarantee program, one form of energy is dominant: nuclear power.

Advocates of nuclear power will be happy with this arrangement. Renewable energy supporters, not so much.


Announced Projects in the DOE’s Loan Programs

  1. Solyndra, Inc. was awarded a $535 million loan guarantee (pdf) to manufacture innovative cylindrical solar photovoltaic panels that provide clean, renewable energy.

    Solyndra solar panel tubes


  2. Nordic Windpower USA has been offered a conditional commitment for $16 million (pdf) to support the expansion of its assembly plant in Pocatello, Idaho to produce its one megawatt wind turbine.

  3. Beacon Power, an energy storage company, has been offered a conditional commitment of $43 million (pdf) to support the construction of its 20 megawatt flywheel energy storage plant in Stephentown, New York that will help ensure the reliable delivery of renewable energy to the electricity grid.

  4. Red River Environmental Products has been offered a conditional commitment for $245 million (pdf) to build an activated carbon (AC) manufacturing facility near Coushatta, Red River Parish, Louisiana.

  5. Vogtle Electric Generating Plant (operated by Southern Nuclear) has been offered conditional commitments for a total of $8.33 billion in loan guarantees (pdf) for the construction and operation of two new nuclear reactors at the Alvin W. Vogtle Electric Generating Plant in Burke, Georgia.

    Vogtle Nuclear Power Plant


  6. BrightSource Energy, Inc. has been offered conditional commitments for more than $1.37 billion in loan guarantees (pdf) under the American Recovery and Reinvestment Act to support the construction and start-up of three utility-scale concentrated solar power plants.

  7. First Wind - Kahuku Wind Power has received a conditional commitment for $117 million to install twelve 2.5 MW wind turbine generators along with a battery energy storage system for electricity load stability.

    Wind turbines


  8. Sage Electrochromics has received a conditional commitment for $72 million to support the financing of the construction and operation of a 250,000 square foot, high volume manufacturing facility to produce SageGlass®, an energy-saving switchable window technology for commercial and residential use.

  9. Ford Motor Company has closed on a $5.9 billion loan (pdf) to transform factories across Illinois, Kentucky, Michigan, Missouri, and Ohio to produce more fuel efficient models.

  10. Nissan has closed on a $1.4 billion loan (pdf) to produce electric cars and battery packs at its manufacturing complex in Smyrna, Tennessee. The loan will aid in the construction of a new battery plant and modifications to the existing assembly facility.

    Nissan Leaf, EV


  11. Tesla Motors has been offered a $465 million loan (pdf) to finance a manufacturing facility for the Tesla Model S sedan and to support a facility to manufacture battery packs and electric drive trains.

  12. Fisker Automotive has been offered a $528.7 million conditional loan (pdf) for the development of two lines of plug-in hybrids that will save hundreds of millions of gallons of gasoline and offset millions of tons of greenhouse gas emissions by 2016.

[Source: DOE press release via email, 5 March 2010]