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Archive for the ‘solar power plants’ Category

photo: Todd Woody

In a follow up to my story in Friday’s New York Times on the beginning of a solar building boom in the desert Southwest, I take a look at California regulators’ approval of the seventh Big Solar farm in two months, the 663.5-megawatt Calico project:

In an article in Friday’s paper, I write about the solar thermal power plant building boom now under way in California’s Mojave Desert. The looming expiration of crucial federal financial support for the multibillion-dollar projects, though, could turn the boom to bust.

But that hasn’t deterred California regulators, who on Thursday approved the seventh large-scale solar thermal farm since late August.

After years of painstaking environmental review, the California Energy Commission has been green-lighting the massive solar power plants at warp speed so developers can break ground before year’s end and qualify for a government cash grant that covers 30 percent of the cost of construction.

The latest approval goes to Tessera Solar’s Calico project, to be built in the San Bernardino County desert in Southern California. Originally proposed to generate 850 megawatts -– at peak output, that’s close to the production of a nuclear power plant -– the project was whittled down to 663.5 megawatts to lessen the impact on wildlife like the desert tortoise and the bighorn sheep.

It’s difficult to appreciate the sheer scale of even the smaller version of the Calico project until you’ve seen Tessera’s Suncatcher solar dishes on the ground. A few years ago I had the opportunity to visit a prototype six-dish Suncatcher solar farm at the Sandia National Laboratories in New Mexico.

Resembling a giant mirrored satellite receiver, each Suncatcher stands 40 feet tall and 38 feet wide with a Stirling engine suspended on an arm over the center of the dish. As the dish tracks the sun, its mirrors concentrate sunlight on the hydrogen gas-filled heat engine. As the superheated gas expands, it drives pistons, which generates 25 kilowatts of electricity.

Now imagine planting 26,540 Suncatchers on 4,613 acres of federal land for the Calico project. Tessera, based in Houston, has also received approval for a 709-megawatt solar power plant to be built in California near the Mexico border. That will require the installation of 28,360 Suncatchers.

“These desert solar projects will provide clean power for our schools, homes, and businesses while reducing fossil fuel consumption, creating local jobs, and reducing the greenhouse gas emissions that threaten California’s economy and environment,” Anthony Eggert, a member of the California Energy Commission, said in a statement on Thursday.

The cost to build the two projects will exceed $4.6 billion, according to Tessera, and it’s highly unlikely that they’ll go online unless the company receives federal loan guarantees that allow developers to borrow up to 80 percent of construction costs on favorable terms. That program expires next September, and Tessera needs to start putting steel into the ground by the end of the year to qualify for the cash grant program.

You can read the rest of the story here.

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photo: Todd Woody

In Friday’s New York Times, I write about the beginning of the long-awaited solar boom in the Mojave Desert and how it may well be short-lived if crucial federal incentives for renewable energy are allowed to expire in the coming months:

NIPTON, Calif. — The long-promised solar building boom in the desert Southwest is finally under way. Here in the Mojave Desert, a dice throw away from the Nevada border, giant road graders and a small army of laborers began turning the dirt for BrightSource Energy’s $2 billion Ivanpah project, the first large-scale solar thermal power plant to be built in the United States in two decades.

The Ivanpah plant is the first of nine multibillion-dollar solar farms in California and Arizona that are expected to begin construction before the end of the year as developers race to qualify for tens of billions of dollars in federal grants and loan guarantees that are about to expire. The new plants will generate nearly 4,000 megawatts of electricity if built — enough to power three million homes.

But this first wave may very well be the last for a long time, according to industry executives. Without continued government incentives that vastly reduce the risks to investors, solar companies planning another dozen or so plants say they may not be able to raise enough capital to proceed.

“I think we’re going to see a burst of projects over the next two months and then you’re going to hear the sounds of silence for quite a while,” said David Crane, chief executive of NRG Energy, on Wednesday after he announced that his company would invest $300 million in the Ivanpah plant.

Solar developers depend on two federal programs to make their projects financially viable. The most crucial is a loan guarantee program, expiring next September, that allows them to borrow money on favorable terms to finance up to 80 percent of construction costs.

The other is the option to take a 30 percent tax credit in the form of a cash payment once a project is built. Although the tax credit does not expire until the end of 2016, the option to take it as a cash payment disappears this year, making it far less valuable to a start-up company that is just beginning to generate revenue.

With both Democrats and Republicans promising to rein in the federal budget, it is unclear whether lawmakers will extend the programs in any form. “That could stall a number of projects and even lead to the failure of some,” said Ted Sullivan, an analyst with Lux Research, a consulting firm in New York.

Yet no one in the desert here wants to think too much about those looming clouds.

“Ivanpah represents a transformational moment in our energy equation,” said John Woolard, BrightSource’s chief executive, who was joined Wednesday by Gov. Arnold Schwarzenegger of California and Interior Secretary Ken Salazar at Ivanpah’s groundbreaking ceremony. “It demonstrates that the U.S. can lead in the drive for renewable energy at scale by building the largest solar plant in the world with new technology.”

The eight California projects that are expected to break ground this year will turn 46 square miles of the desert into a futuristic landscape of mirrors, towers and solar dishes. State officials estimate the plants will create 8,000 jobs in a state with a 12.4 percent unemployment rate.

During its three years of construction, Ivanpah will employ as many as 1,000 laborers in a recession-scarred region.

“In the last year, I haven’t worked,” said Basilio Yniguez, a 36-year-old pipefitter and father of seven, as he helped build a holding pen last week for threatened desert tortoises on the Ivanpah site. “Thanks to the green thing going up, I’m working.”

The state is supporting the industry in part by mandating that California utilities get a third of their electricity from renewable sources by 2020.

“When you look at the raw number of kilowatt-hours we need, I don’t see how you get there without large central station solar projects,” said Pedro Pizarro, a top executive with Southern California Edison, one of the state’s largest utilities.

Unlike the photovoltaic panel systems found on rooftops, most of the new solar plants will use thousands of large mirrors to heat liquids to generate steam that drives conventional electricity-generating turbines.

“Without the Department of Energy coming in to assume a lot of the risk, you might not find lenders willing to lend, particularly if you’re a start-up with untried technology,” said Nathaniel Bullard, a solar analyst at Bloomberg New Energy Finance.

Other hurdles also stand in the way of the solar expansion. For some plants, multibillion-dollar transmission lines must be built to carry electricity from the desert to cities. Some environmentalists continue to oppose the projects’ impact on imperiled wildlife, such as the desert tortoise, and may sue to stop construction.

The competitiveness of large-scale solar thermal plants in California also depends on the cost of natural gas, the state’s dominant source of electricity. According to Mr. Bullard, gas-fueled plants can produce electricity for about 10 cents a kilowatt-hour. After including the government subsidies, solar thermal plants are expected to generate power at 13 to 17 cents a kilowatt-hour, which the industry says is close enough in price to be competitive.

So far, Ivanpah is the only California solar thermal project to win a government loan guarantee, although other projects have applied and are awaiting decisions from the Energy Department.

“We are sensitive to the deadlines and are doing everything we can so that these projects can move forward,” said Jonathan Silver, the executive director of the department’s loan program. “There’s a significant demand for these funds.”

The uncertainty has left even some of the licensed solar projects in limbo.

You can read the rest of the story here.

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photo of desert tortoise tagged with a radio transmitter at the Ivanpah solar farm site: Todd Woody

In Yale Environment 360 on Wednesday, I interview John Woolard, chief executive of BrightSource Energy, the California solar developer that has begun construction of the first large-scale solar thermal power plant to be built in the United States in two decades:

Today, California Gov. Arnold Schwarzenegger, Interior Secretary Ken Salazar, and other dignitaries gathered in the Mojave Desert to officially break ground on BrightSource Energy’s Ivanpah Solar Electric Generating System, the first large-scale solar thermal power plant to be built in the United States in nearly two decades.

BrightSource is one of a half-dozen big solar farms, with a combined electricity-generating capacity of 2,829 megawatts, licensed by the California Energy Commission over the past two months. By year’s end, California and federal regulators expect to approve additional projects that will produce a total of 4,143 megawatts. At peak output, that’s the equivalent of several nuclear power plants and more than seven times the solar capacity installed in the United States last year.

The approval of the projects comes after years of environmental review and controversies over the installations’ impact on water, wildlife, and fragile desert landscapes. The power plants licensed so far will cover some 39 square miles of desert land with a variety of new and old solar thermal technologies. Unlike rooftop photovoltaic panels that directly convert sunlight into electricity, solar thermal uses the sun to heat liquids to create steam that drives electricity-generating industrial turbines.

BrightSource’s 370-megawatt Ivanpah project, located just over the California border, 40 miles southwest of Las Vegas, is the world’s largest solar-thermal power plant project currently under construction. The company, led by CEO John Woolard, received a $1.37 billion loan guarantee from the United States Department of Energy to build the project, which will deploy 347,000 large mirrors that will surround three towers on 3,500 acres of federal land. The mirrors will focus the sun on a water-filled boiler that sits atop the tower to create high-temperature, high-pressure steam.

Woolard, 45, came to BrightSource as chief executive in 2004 after co-founding Silicon Energy, an energy efficiency software company, and stints at California utility PG&E, the Lawrence Berkeley National Laboratory, and VantagePoint Venture Partners, a leading Silicon Valley green tech venture capital firm. He sat down with Yale Environment 360 contributor Todd Woody at BrightSource’s Oakland, Calif., headquarters to talk about the future of Big Solar and the challenges the industry faces — from a woefully inadequate electricity grid to the imperative of minimizing water use — as multibillion-dollar projects finally begin to become a reality.

Yale Environment 360: Are we witnessing the birth of a major new solar industry in the United States?

John Woolard: I hope. The number I always go back to is that we have done 74,000 permits for oil and gas in the last 20 years and we finally have five or six for solar. That’s a good step forward. The agencies are learning how to permit, they’re learning how to move forward. It’s great for the industry and we can finally get some size and consequence.

e360: As the photovoltaic industry increasingly becomes dominated by overseas companies in China and elsewhere, does the sheer scale of these solar thermal projects in the U.S. give the country the opportunity to become the technological and market leader?

Woolard: Oh, yeah. Solar thermal is very different from [photovoltaic technology]. The power has different characteristics and is more reliable. They’re almost apples and oranges. Solar thermal has got very interesting We don’t have a quantity and energy problem; It’s a collection and distribution problem.” attributes and characteristics that make it unique.

In the U.S. we’re lucky. The southwestern U.S. has high desert, which means it’s closer to the sun, less atmosphere to go through. It’s the best solar resource anywhere, outside the Anaconda Desert in Chile or a few places. Harnessing that resource effectively is the most important thing. So we don’t have a quantity and energy problem; it’s a collection and distribution problem.

e360: BrightSource’s Ivanpah project is not only the first large-scale solar thermal project to break ground, it is the first to deploy a new power tower technology. Why is that significant?

Woolard: Our team was part of building older trough plants and you learn a lot. If you take a power tower, you get higher temperatures and pressures. That gives you higher thermo-to-electrical conversion efficiency. Think of that as more efficiency, less waste, lower cost. Because of that, you need fewer mirrors, less solar field, and you have a more efficient design.

The other gets down to how you actually build on the land. If you take the older trough designs or anything with a lot of mirrors, [it] would degrade the land. It’s more damaging from a soil and runoff perspective.

The big [problem] is water. What is the world going to look like over the next 20, 30, 40 years? Water in the desert is going to become a much more challenging proposition. So we’ve gotten water usage down to a minimum — the lowest of anybody in the world, basically.

You can read the rest of the interview here.

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photo: Todd Woody

I wrote this story for Grist, where it first appeared.

The United States is on the verge of a solar boom that could provide 4.3 percent of the nation’s electricity by 2020, according to a new report from Bloomberg New Energy Finance.

There’s just a 12-figure catch: Investors need to put $100 billion into the solar industry to keep the generation of solar electricity growing by 42 percent a year for the next decade to expand capacity from the current 1.4 gigawatts to 44 gigawatts.

“Policy measures such as tax credits, capital expenditure grants, generation incentives and renewable electricity credits will remain a key driver of solar uptake in the U.S. for at least the next three years,” according to the report from Bloomberg New Energy Finance, a research and consulting firm. “The current drop in solar costs is taking place just as such policies are being implemented by the federal and various state governments, which is expected to lead to rapid growth in commercial, utility and residential solar power.”

Over the past two years, solar module prices have plunged by 50 percent as low-cost Chinese manufacturers expanded production and entered the U.S. market.

“Policy, rather than sunshine, will remain the U.S.’s greatest solar resource for the next few years,” Milo Sjardin, Bloomberg New Energy Finance’s head of U.S. research, said in a statement. “By the middle of this decade, however, the U.S. retail solar market will be driven by fundamental, unsubsidized competition, which should transform the U.S. into one of the world’s most dynamic solar markets.”

Exhibit A for such a phenomenon is Germany. With about as much sunshine as Maine, the European nation became the world’s solar stronghold through policies that rewarded homeowners, businesses, and farmers for generating their own electricity.

Such policies are needed in the U.S., according to the report, given that solar electricity remains four times as expensive to generate than coal-fired power.

Of course, the failure of Congress to pass national climate change legislation and the current attempt to kill California’s global warming law shows that progress on green energy issues is not guaranteed in the U.S. And Congress’ habit of offering short-lived tax incentives for renewable energy and then dithering about extending them when they expire has played havoc with the industry and investors.

Bloomberg New Energy Finance predicts photovoltaic panels will account for 30 gigawatts of the 44 gigawatts of solar electricity generation by 2020, with 14 gigawatts coming from solar thermal power plants. Solar thermal farms deploy huge arrays of mirrors to heat liquids to create steam that drives electricity-generating turbines.

That might be a conservative estimate, if the California and federal officials’ rush to green light big solar projects in recent weeks is any indication. On Monday, for instance, Interior Secretary Ken Salazar approved a 1,000-megawatt solar thermal power plant to be built in the Southern California desert.

By year’s end, nearly four gigawatts of solar thermal projects are expected to be licensed. Just 10 gigawatts to go until 2020.

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photo: Todd Woody

I wrote this story for Grist, where it first appeared.

The Obama administration’s solar building boom continues. On Wednesday, Interior Secretary Ken Salazar signed the first lease to build a large-scale photovoltaic project on federal land in Nevada.

“Yes, it’s about jobs and finding a new way forward but it’s also about dealing with the crises of our time facing America,” said Salazar during a speech in Los Angeles at the Solar Power International conference, the industry’s big annual get-together. “America’s foreign policy is held hostage by the politics of oil. It is imperative that we grab this new energy future.”

It’s a significant move. The U.S. Bureau of Land Management controls a huge chunk of Nevada, prime territory for big solar power projects due to the state’s intense sunshine and a licensing process that is far less arduous than the one in neighboring California.

On stage at the conference, Salazar signed a lease for the 60-megawatt Silver State photovoltaic farm to be built by First Solar outside of Las Vegas. The secretary said it will supply enough electricity to power more than 15,000 homes.

In recent weeks, Salazar has signed off on leases for three other solar projects in Southern California that would generate 1,124 megawatts of electricity.

“We’re not done yet, we’re not done yet. Our work is just beginning,” said Salazar, who left his trademark 10-gallon hat back in Washington.

A report released Wednesday by the Solar Foundation, a non-profit research group, said that there are 93,000 people employed in the solar business in the U.S. and that a survey of employers found that they plan to add 24,000 more jobs by August 2011.

Rhone Resch, chief executive of the Solar Energy Industries Association, noted that a decade ago U.S. companies supplied 40 percent of the world’s photovoltaic products while today it’s just 10 percent.

“We hope this is a sign of a turnaround and that policymakers take note,” he said Wednesday, referring to the solar employment study.

While solar jobs exist in all 50 states, the study found that nearly 40 percent of them were created in California, the state with the most aggressive renewable energy targets.

But expect the federal government to be driving demand for solar power — for its own use.

“It’s important we all walk the talk,” Salazar said, noting that the Interior Department alone has installed more than 2,000 renewable energy projects.

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photo: Todd Woody

I wrote this story for Grist, where it first appeared.

Interior Secretary Ken Salazar on Tuesday gave the green light to the first two big solar power plants to be built on federal land in the California desert, promising more approvals of solar projects in the coming weeks.

The granting of leases to Tessera Solar’s massive 709-megawatt Imperial Valley Solar Project and to a smaller 45-megawatt photovoltaic farm to be built by Chevron come four years after the solar land rush began in the Mojave Desert.

With nearly 200 applications filed on hundreds of thousands of acres of Bureau of Land Management (BLM) property, the federal government soon became overwhelmed trying to weed out viable projects from speculators. Environmentalists, meanwhile, grew alarmed at the potential impact of such huge industrial projects on a plethora of imperiled wildlife, as well as on water supplies and desert vistas.

The Obama administration beefed up BLM staff devoted to solar projects and began collaborating with California agencies to streamline the approval process.

“Today’s projects are proof that we can cut red tape without cutting corners,” Salazar said Tuesday during a press conference.

The looming expiration of federal tax incentives for large renewable energy projects also lit a fire under state and federal regulators to license power plants so that developers could begin construction by the end of the year.

For instance, since Aug. 25, the California Energy Commission has licensed six solar thermal power plants that would cover some 39 square miles of desert land and generate 2,829 megawatts. That’s nearly six times as much solar capacity as was installed in the United States last year.

“I am excited to join Secretary Salazar today in announcing the first solar projects to ever get permits on federal land, both of which will be located in the Golden State,”  California Gov. Arnold Schwarzenegger said in a statement. “Today’s announcement only further cements California’s national leadership in renewable energy development.”

Some environmental groups initially raised concerns about the Imperial Valley project, which will place 19,000, 38-foot by 40-foot Stirling solar dishes on 6,400 acres of desert land near the Mexican border east of San Diego. Of particular concern was the project’s impact on the flat-tailed horn lizard and the Peninsular bighorn sheep. A Native American tribe, meanwhile, objected to the power plant’s presence on their ancestral lands.

But Johanna Wald, a senior attorney at the Natural Resources Defense Council in San Francisco, said the developer’s willingness to shrink the project to mitigate degradation of wildlife habitat and to minimize its water consumption won over her group and other environmentalists.

“The company sat down with NRDC and our conservation partners and agreed to a number of important measures that were above and beyond the requirements that were imposed by the state and federal regulators,” Wald said in an interview.

Nevertheless, the Sierra Club, the Center for Biological Diversity, and Native Americans have continued to object to the Imperial Valley solar farm.

Wald singled out the much smaller Chevron project as one where developers’ selection of a site near transmission lines and away from protected wildlife paid off in the unanimous support from major environmental groups.

“Chevron,” she said, “is a project we all would agree was smart from the start.”

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photo: Todd Woody

I wrote this story for Grist, where it first appeared.

While efforts to pass federal climate change legislation have stalled and a fight rages in California to overturn its global warming law at the ballot box, Golden State regulators have been licensing massive desert solar power plant projects at a breakneck pace in recent weeks.

On Wednesday, for instance, the California Energy Commissioned approved two solar projects that would generate nearly 1,000 megawatts of electricity, the 250-megawatt Genesis Solar Energy Project and the 709-megawatt Imperial Valley Solar Project.

Since Aug. 25, the energy commission has licensed six solar thermal power plants that would cover some 39 square miles of desert land and generate 2,829 megawatts. That’s nearly six times as much solar capacity that was installed in the United States last year, mostly from rooftop solar panels.

“Consider how important it is that California move aggressively toward renewables and how important these pioneering projects are,” said Jeffrey Byron, a member of the California Energy Commission, said at a hearing Wednesday.

Regulators and developers are racing to put shovels to ground before the end of the year when federal incentives for large renewable energy projects expire, which could threaten the financial viability of some of the solar projects.

The Genesis project, to be built by Florida-based energy giant NextEra Energy Resources (formerly called FPL), will build long rows of parabolic troughs in the Riverside County desert that will focus sun on liquid-filled tubes suspended over the mirrors to create steam that will drive an electricity-generating turbine. It’s an older solar technology that was first deployed in the 1980s in California.

Tessera Solar’s  Imperial Valley project, on the other hand, will be the first big test of Stirling dish technology. Resembling a giant mirrored satellite receiver, the 38-foot-high, 40-foot-wide, solar dish focuses the sun’s rays on a Stirling engine, heating hydrogen gas to drive pistons that generate 25-kilowatts of electricity. Some 29,000 of Tessera’s Suncatchers will be installed on more 6,400 acres of desert land near the Mexican border about 100 miles east of San Diego.

Meanwhile, California Gov. Arnold Schwarzenegger this week signed into law what is thought to be the nation’s first energy storage legislation. The bill, AB 2514 could result in regulations requiring the state’s utilities to store a certain percentage of electricity generated in energy storage systems such as batteries, compressed air or flywheels.

Energy storage is considered crucial for the mass deployment of solar power plants, wind farms and other sources of intermittent renewable energy, as well to build out the smart grid.

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photo: California Energy Commission

In Friday’s New York Times, I wrote about California regulators’ licensing of a 1,000-megawatt solar thermal power plant, which would be the world’s largest solar energy complex:

California regulators have licensed what is for the moment the world’s largest solar thermal power plant, a 1,000-megawatt complex called the Blythe Solar Power Project to be built in the Mojave Desert.

By contrast, a total of 481 megawatts of new solar capacity was installed in the United States last year, mostly from thousands of rooftop solar arrays, according to the Solar Energy Industries Association, a trade group.

“Given the challenge of climate change at this time, it is very important to reduce fossil fuel use by moving forward with the largest solar project in California,” Robert Weisenmiller, a member of the California Energy Commission, said at a hearing Wednesday in Sacramento after a unanimous vote to approve the Blythe project.

“We’re taking a major step toward reducing the threat of future climate change impacts on the state, and at the same time the other real challenge for the state is the economy,” he added, referring to 604 construction jobs and 221 permanent jobs that the Blythe project would create in an area of California where the unemployment rate was 15 percent this summer.

After years of environmental reviews, the California Energy Commission has in the past three weeks licensed solar thermal farms that would generate 1,500 megawatts of electricity when completed.

A commission spokeswoman said the commissioners anticipated making licensing decisions by the end of 2010 on additional solar projects that would produce another 2,829 megawatts. At peak output, those solar farms would generate the equivalent electricity produced by several large nuclear power plants.

Developers are racing to start construction before federal tax incentives for big renewable energy projects expire at year’s end.

If all the projects are built, they would create 8,000 construction jobs and 1,000 permanent jobs, according to the energy commission.

At peak operation, the Blythe solar complex would supply enough electricity for 800,000 homes. The multibillion-dollar project will be built in four 250-megawatt phases.

It is notable for being the first big solar project to be licensed that would be built on federal land. The United States Bureau of Land Management is expected to decide by the end of October whether to approve the Blythe complex.

The project will be constructed by Solar Millennium, a German developer, and will cover 9.3 square miles in Riverside County in Southern California with long rows of parabolic troughs. The solar reflectors focus the sun on liquid-filled tubes suspended over the mirrors to create steam that drives an electricity-generating turbine housed in a central power block.

You can read the rest of the story here.

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I wrote this story for Grist, where it first appeared.

The California Legislature has passed the nation’s first energy storage bill, which could result in the state’s utilities being required to bank a portion of the electricity they generate.

Assembly Bill 2514 now heads to the desk of Gov. Arnold Schwarzenegger, who has made climate change and green technology his political legacy as his final term winds down.

Energy storage is considered crucial for the mass deployment of wind farms, solar power plants, and other sources of intermittent renewable energy, as well to build out the smart grid.

On the West Coast, for instance, the wind tends to blow hardest at night when demand for electricity is low. If utilities can store that wind-generated power — and energy from solar farms — in batteries, flywheels, and other devices, they can avoid building and firing up those billion-dollar, greenhouse gas-emitting, fossil-fuel power plants that are only used when demand spikes.

AB 2514 won the support of Jerry Brown, the California attorney general who is the Democratic candidate for governor. The Sierra Club and union groups also support the measure. Various business organizations, including the California Chamber of Commerce, opposed the bill.

Sponsored by Assembly member Nancy Skinner, a Berkeley Democrat, the bill was stripped of its more stringent provisions by the time it emerged from the legislative sausage-making process on Friday.

Originally, AB 2514 required California’s three big investor-owned utilities — PG&E, Southern California, and San Diego Gas & Electric — to have energy storage systems capable of providing at least 2.25 percent of average peak electrical demand by 2015. By 2020 the target would rise to at least 5 percent of average peak demand.

The bill now only requires that the California Public Utilities Commission determine the appropriate targets — if any — for energy storage systems, and then require the Big Three utilities to meet those mandates by 2015 and 2020. Publicly-owned utilities must set energy storage system targets to be met by 2016 and 2021.

Still, AB 2514 is a significant step and could ultimately help jump-start the market for energy storage, which remains in its infancy.

PG&E, for instance, plans to build an experimental facility that would tap electricity generated during peak wind farm production to pump compressed air into an underground reservoir. When demand jumps, the reservoir would release the air to run electricity-generating turbines which are capable of producing 300 megawatts of power.

And last week, PG&E proposed building a “pumped hydro” storage system. As its name implies, the system would pump water from one reservoir to another reservoir at a higher elevation during times of peak renewable energy production. Water in the upper reservoir would then be sent back downhill to power a turbine when electricity demand begins to spike.

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photo: Todd Woody

In Wednesday’s New York Times, I write about the California Energy Commission green-lighting the nation’s first big solar power plant in 20 years:

California regulators on Wednesday approved a license for the nation’s first large-scale solar thermal power plant in two decades.

The licensing of the 250-megawatt Beacon Solar Energy Project after a two-and-a-half-year environmental review comes as several other big solar farms are set to receive approval from the California Energy Commission in the next month.

“I hope this is the first of many more large-scale solar projects we will permit,” said Jeffrey D. Byron, a member of the California Energy Commission, at a hearing in Sacramento on Wednesday. “This is exactly the type of project we want to see.”

Developers and regulators have been racing to license solar power plants and begin construction before the end of the year, when federal incentives for such renewable energy projects expire. California’s three investor-owned utilities also face a deadline to obtain 20 percent of their electricity from renewable sources by the end of 2010.

Still, it has been long slog as solar power plants planned for the Mojave Desert have become bogged down in disputes over their impact on protected wildlife and scarce water supplies.

In March 2008, NextEra Energy Resources filed an application to build the Beacon project on 2,012 acres of former farmland in California’s Kern County. Long rows of mirrored parabolic troughs will focus sunlight on liquid-filled tubes to create steam that drives an electricity-generating turbine.

Some rural residents immediately objected to the 521 million gallons of groundwater the project would consume annually in an arid region on the western edge of the Mojave Desert. After contentious negotiations with regulators, NextEra agreed to use recycled water that will be piped in from a neighboring community.

“It’s been a lengthy process, an almost embarrassingly long lengthy process,” said Scott Busa, NextEra’s Beacon project manager, at Wednesday’s hearing. “Hopefully, we’re going from a lengthy process to a timely process.”

You can read the rest of the story here.

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