TVA sees a future in clean coal generation

By Knoxville News Sentinel


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Well over half of the electricity used by homes and businesses in the Tennessee Valley region comes from burning coal. This roughly mirrors the national use of coal, a plentiful domestic energy source that has fueled our economy and our way of life for many years.

Meeting the environmental challenges of a fuel that generates such a large portion of our electricity is a priority for TVA. Like all electric utilities, whether public or private, we are responsible for meeting electricity demand as reliably and economically as possible in the public interest.

The national campaign to dismiss the future of "clean coal" technology fails to credit substantial progress that has been made in reducing fossil fuel emissions and the continuing research to further minimize the environmental impacts of an important national energy source.

Data compiled by the U.S. Environmental Protection Agency show that air quality has improved steadily during the past three decades since national standards were established by the Clean Air Act in 1970. During this time, TVA has invested more than $5 billion in emissions control equipment at our plants across the Valley and will install another $400 million worth of controls by the end of 2010. Complying with interstate emission rules now under discussion could require an additional $3 billion investment in coming years.

These costs become the price we all pay for electricity.

Installing emission controls and switching to cleaner types of coal have reduced regulated emissions by more than 80 percent since the late 1970s. Reductions approaching 90 percent are expected with the installation of additional equipment.

Along with emissions, the other major environmental challenge posed for most utilities that use coal is managing waste byproducts-primarily ash and gypsum. The issue was brought to the forefront last December by the coal ash spill at TVA's Kingston Fossil Plant.

To ensure the safety of our coal waste storage facilities, TVA is planning to close all wet storage impoundments and establish dry storage for all our coal plants. TVA is taking these steps to achieve the safest coal waste management program in the industry.

The investments in emission controls and coal byproduct waste management are necessary to maintain a reliable power supply while TVA pursues a strategy to reduce our carbon footprint.

Currently, more than 30 percent of TVA's generation comes from zero or near-zero carbon-emitting fuels, such as nuclear and hydropower, along with a small but growing amount of renewable energy from wind, solar and methane gas.

Negotiations are under way with renewable energy suppliers to add up to 2,000 megawatts or more of renewable energy, mostly wind power, as it becomes available during the next two to three years.

The addition of more renewable energy, the completion of a second nuclear unit at Watts Bar Nuclear Plant in 2013 and the possible addition of future nuclear units at the Bellefonte site in North Alabama support TVA's move toward having at least 50 percent of its power supply provided by zero or near-zero carbon-emitting sources by 2020.

At the same time, we are working with state and federal officials to develop energy efficiency incentives that encourage consumers to be wiser and more frugal about energy use.

The collective progress toward developing a larger supply of cleaner energy will certainly benefit air quality and reduce the amount of coal byproducts that have to be managed. It is realistic and important for TVA to pursue a cleaner energy strategy for the future while responsibly managing the environmental challenges of a reliable energy source that we all depend upon today.

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Covid-19 crisis hits solar and wind energy industry

COVID-19 Impact on US Renewable Energy disrupts solar and wind projects, dries up tax equity financing, strains supply chains, delays construction, and slows jobs growth amid limited federal stimulus and uncertain investor appetite.

 

Key Points

COVID-19 has slowed US clean energy growth by curbing tax equity, disrupting supply chains, and delaying projects.

✅ Tax equity dries up as investor profits fall

✅ Supply chain and construction face pandemic delays

✅ Policy aid and credit extensions sought by industry

 

Swinerton Renewable Energy had everything it needed to build a promising new solar farm in Texas. It lined up more than 2,000 acres for the $109 million project estimated to generate 400 jobs while under construction. By its completion date, the solar farm was expected to produce 200 megawatts of energy — enough to power about 25,000 homes — and generate big tax breaks for its investors as part of a government program to incentivize clean energy.

But the coronavirus pandemic put everything on hold. The solar farm’s backers aren’t sure they will make enough money from other investments during the pandemic-fueled downturn for those tax breaks to be worth it. So the project has been delayed at least six months.

“This is not a shortage of materials. It is not a pricing issue,” said George Hershman, president of Swinerton Renewable Energy. “Everything was pointing to successful projects.”

The coronavirus crisis is not only battering the oil and gas industry. It’s drying up capital and disrupting supply chains for businesses trying to move the country toward cleaner sources of energy.

While President Trump has promised lifelines for airlines and oil companies struggling with a drastic decrease in demand as Americans remain under stay-at-home orders, there is little focus in Washington on economic relief for this sector, despite a power coalition's call for action to address the pandemic — unlike during the Great Recession a decade ago, when Congress and the Obama administration earmarked an unprecedented sum for renewable energy and more efficient automobiles in a stimulus bill.

“We don’t want to lose our great oil companies,” Trump said during an April 1 news briefing. He so far has not made a similar promise to help wind and solar firms, and none of the four economic rescue and stimulus packages that Congress has passed to respond to the coronavirus crisis set aside any money for renewable energy specifically.

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The impact of the crisis is already clear: About 106,000 clean-energy workers have already filed for unemployment in March alone, according to an analysis of Bureau of Labor Statistics data by Environmental Entrepreneurs, an advocacy group.

The layoffs are a blow to a sector that has prided itself on official projections that solar installers and wind turbine technicians would be the two fastest growing occupations over the next decade.

The job losses include not just wind and solar construction workers, but also those assembling electric cars and installing energy-efficient appliances, lighting, heating and air conditioning.

“These aren’t left-wing coastal hippies,” said Bob Keefe, executive director of Environmental Entrepreneurs. “These are construction workers who get up every day and lace up their boots and pull on their gloves and go to work putting insulation in our attics.”

Despite the economic turmoil, climate experts say the coronavirus pandemic could be an opportunity to make drastic shifts in the energy landscape, with green investments potentially driving a robust recovery. They say governments around the world should help fund renewable energy and use the turmoil in energy markets to remake the industry and slash carbon dioxide emissions, which will tumble 8 percent this year, according to the International Energy Agency.

The agency said that while global energy demand fell 3.8 percent in the first quarter, renewables were the only source to post an increase in demand, rising 1.5 percent thanks to new renewable power plants, low operating costs and priority on some electricity grids.

But many investors, who rely on a broad mix of investments, are spooked. “Everything is quiet because people want to see where we land with the current crisis, and people are holding on to cash,” said Daniel Klier, the global head of sustainable finance at HSBC bank. “As soon as people have a bit of confidence that the market is recovering, they can get projects going.”

Social distancing and the country’s stay-at-home orders are also having a deep effect on daily operations. The areas hardest hit are installing solar panels on rooftops and adding energy-efficiency measures inside homes — work that often requires face-to-face interactions. Sungevity, once one of the nation’s leading solar-installation companies, laid off 377 workers, most of its workforce, in late March, according to filings with California’s Employment Development Department. The company, which had emerged from a 2017 bankruptcy, cited economic conditions.

The push to promote a more fuel-efficient automobile fleet has also veered off track. The electric car maker Tesla was forced to shut down its factory in Fremont, Calif., just as it was turning up production on its new crossover vehicle, the Model Y.

Lockdown orders across the country led Tesla’s outspoken chief executive, Elon Musk, to launch into an expletive-laden rant during an earnings call last week in which Tesla posted a lukewarm profit of $16 million.

“To say that they cannot leave their house and they will be arrested if they do,” Musk said, “this is fascist.”

Sungevity and Tesla represent only a sliver of the economic pain in this sector across the country. The Solar Energy Industries Association had anticipated a growth in solar jobs, from 250,000 to 300,000, over the course of the year, said the group’s president, Abigail Ross Hopper. Now, she said, half the workforce is at risk.

“Shelter in place puts limitations on how people can work,” she said. “Literally, people don’t want other people inside their houses to fix electrical boxes. And there are no door-to-door sales.”

Bigger projects are also grappling with the pandemic economy, though not as severely. Hopper said the industry was geared up to increase the number of new solar farms, in part to take advantage of federal tax credits. “We were on track to do almost 20 gigawatts, which would have been the highest year yet,” Hopper said. That would have been enough to power about 3.7 million homes. Now she expects new projects will come closer to last year’s 13.27 gigawatts’ worth of new construction, after a report on utility-scale solar delays warned of widespread slowdowns, enough to run approximately 2.5 million homes.

Wind energy companies, too, are bracing for lost progress unless the federal government steps in. The American Wind Energy Association said projects that would add 25 gigawatts of wind power to the U.S. grid are at risk of being scaled back or canceled outright over the next two years because of the pandemic. Altogether, that work represents about 35,000 jobs.

“2019 was a good year for the wind industry,” said Tom Kiernan, the association’s chief executive. “We were expecting 2020 to be an even stronger year.”

One project put on the back burner: an enormous 9 gigawatt offshore wind venture led by the New York State Energy Research and Development Authority set to be completed by 2035.

With New York City besieged by coronavirus cases, the authority said it would comply with an executive order from Gov. Andrew M. Cuomo (D), “pausing” all on-site work on clean-energy projects until at least May 15. Michigan, New Jersey and Pennsylvania also delayed wind turbine projects by deeming construction on them nonessential.

The Danish offshore wind firm Orsted said that plans for offshore U.S. wind installations would move “at a slower pace than originally expected due to a combination of the Bureau of Ocean Energy Management’s prolonged analysis of the cumulative impacts from the build-out of US offshore wind projects, and now also COVID-19 effects.” The company told investors it expects delays on projects off the coasts of New York, New Jersey and Rhode Island totaling almost 3 gigawatts.

The supply chains have also taken a hit during the pandemic: Even if contractors can get the money to erect wind turbines or lay solar arrays, that doesn’t mean they will have the parts. At least two factories that make wind turbine parts — one in North Dakota and another in Iowa — were forced to pause production because of coronavirus outbreaks. Factory shutdowns in China have constrained solar supplies, too.

The key reason for delaying most big solar and wind projects is the use of tax credits known as “tax equity.” These allow investors, such as banks, to use the credits to directly offset their overall tax burdens. But if an investor doesn’t have enough profit to offset the credits, the tax equity could become worthless.

“If your profitability is going down, you don’t have the same appetite,” Hopper said.

Solar and wind industry leaders are pressing Congress and the Trump administration to extend the eligibility period for tax credits that are due to expire, with senators urging support for clean energy in relief packages, and to make the tax credits refundable, meaning the government would issue a check to investors who do not have enough profit to justify their investments.

Currently, big wind turbines get a 1.5 cents per kilowatt hour tax credit if construction begins before the end of this year. Tax credits for residential renewable energy — solar panels and small wind — phase out by the end of 2021, and debate over a potential solar ITC extension continues to shape expectations in the wind market.

The lack of attention to renewables in Congress’s relief efforts so far is in stark contrast to 2009, when the United States spent $112 billion to boost “green” energy, according to the World Resources Institute. The government’s package then provided a mixture of grants and loans for a variety of renewable energy ventures — including a $465 million loan Tesla used to get its Fremont factory off the ground.

This year, a handful of clean-energy firms, including a Connecticut-based manufacturer of fuel cells and an Ohio-based maker of energy-efficient lighting systems, took money from a federal small-business lending program, before funds ran dry in the middle of last month. Broadwind Energy, a maker of steel wind energy towers based outside Chicago, received $9.5 million in small-business loans, one of the biggest totals in the program.

So far, the Trump administration has shown far more eagerness to help American petroleum producers that the president said were “ravaged” by a sharp drop in energy demand. Last month, Trump met with oil executives at the White House, and Energy Secretary Dan Brouillette has floated the idea of bridge loans for struggling oil firms.

During negotiations for the last relief package, congressional Democrats tried to strike a deal to refill the nation’s Strategic Petroleum Reserve in exchange for extending the clean-energy incentives, but Senate Majority Leader Mitch McConnell (R-Ky.) rebuffed those calls.

“Democrats won’t let us fund hospitals or save small businesses unless they get to dust off the Green New Deal,” McConnell said in March.

Already, Democrats are signaling they will make a push again in the next round of stimulus spending.

“Relief and recovery legislation will shape our society for years to come,” said Rep. A. Donald McEachin (D-Va.), vice chair of the House Sustainable Energy and Environment Coalition, a caucus that supports renewable energy resources. “We must use these bills to build in a climate-smart way.”

But it remains unclear how much appetite the GOP will have for a deal. “I just don’t know how to handicap that at this point,” said Grant Carlisle, an analyst at the Natural Resources Defense Council, a major environmental group.

Kiernan, the head of the American Wind Energy Association, said his group has “gotten a very good reception with the administration and with the Hill” when it comes to coronavirus relief, but he declined to go into specifics.

In other parts of the world, governments have been providing support for renewables. The European Union has its own Green New Deal, and China is expected to support wind and solar to get the economy moving more quickly.

Some energy analysts note that big oil companies don’t have to wait for government stimulus. The price of oil is so low that they would be better off investing in wind and solar, they say.

“For all these oil companies, the returns on these renewable projects are better than what they can do in the oil and gas industry,” said Sarah Ladislaw, director of the energy program at the Center for Strategic and International Studies. “Now is a good time to do that and tell their investors.”

This fits in with their broader goals, analysts contend. After all, Royal Dutch Shell recently matched BP’s earlier promise to aim to be net-zero for carbon emissions by 2050.

Shell’s chief executive Ben van Beurden has said the company would try to protect its low-carbon Integrated Gas and New Energies division from the largest spending cuts as it sought to weather the pandemic. “We must maintain focus on the long term,” he said in a video message. “Society expects nothing less.”

 

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France nuclear power stations to limit energy output due to high river temps

France Nuclear Heatwave Restrictions signal reduced nuclear power along the Rhone River as EDF imposes output limits due to high water temperatures, grid needs, with minimal price impact amid strong solar and exports.

 

Key Points

Temporary EDF output limits at Rhone River reactors due to hot water, protecting ecosystems and grid reliability.

✅ EDF expects halved output at Bugey and Saint Alban.

✅ Cuts align with water temperature and discharge rules.

✅ Weekend midday curtailments offset by solar supply.

 

The high temperature warning has come early this year but will affect fewer nuclear power plants. High temperatures could halve nuclear power production, with river temperature limits at plants along France's Rhone River this week. 

Output restrictions are expected at two nuclear plants in eastern France due to high temperature forecasts, nuclear operator EDF said. It comes several days ahead of a similar warning that was made last year but will affect fewer plants, and follows a period when power demand has held firm during lockdowns across Europe.

The hot weather is likely to halve the available power supply from the 3.6 GW Bugey plant from 13 July and the 2.6 GW Saint Alban plant from 16 July, the operator said.

However, production will be at least 1.8 GW at Bugey and 1.3 GW at Saint Alban to meet grid requirements, and may change according to grid needs, the operator said.

Kpler analyst Emeric de Vigan said the restrictions were likely to have little effect on output in practice. Cuts are likely only at the weekend or midday when solar output was at its peak so the impact on power prices would be slim.

He said the situation would need monitoring in the coming weeks, however, noting it was unusually early in the summer for nuclear-powered France to see such restrictions imposed.

Water temperatures at the Bugey plant already eclipsed the initial threshold for restrictions on 9 July, as European power hits records during the heatwave. They are currently forecast to peak next week and then drop again, Refinitiv data showed.

"France is currently net exporting large amounts of power – and, despite a nuclear power dispute with Germany, single nuclear units' supply restrictions will not have the same effect as last year," Refinitiv analyst Nathalie Gerl said.

The Garonne River in southern France has the highest potential for critical levels of warming, but its Golfech plant is currently offline for maintenance until mid-August, as Europe faces nuclear losses, the data showed.

"(The restrictions were) to be expected and it will probably occur more often," Greenpeace campaigner Roger Spautz said.

"The authorities must stick to existing regulations for water discharges. Otherwise, the ecosystems will be even more affected," he added.

 

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New Hydro One CEO aims to repair relationship with Ontario government — and investors

Hydro One CEO Mark Poweska aims to rebuild ties with Ontario's provincial government, investors, and communities, stabilize the executive team, boost earnings and dividends, and reset strategy after the scrapped Avista deal and regulatory setbacks.

 

Key Points

He plans to mend government and investor relations, rebuild the C-suite, and refocus growth after the failed Avista bid.

✅ Rebuild ties with Ontario government and regulators

✅ Stabilize executive team and governance

✅ Refocus growth after Avista deal termination

 

The incoming chief executive officer of Hydro One Ltd. said Thursday that he aims to rebuild the relationship between the Ontario electrical utility and the provincial government, as seen in COVID-19 support initiatives, as well as ties between the company and its investors.

Mark Poweska, the former executive vice-president of operations at BC Hydro, was announced as Hydro One’s new president and CEO in March. His hiring followed a turbulent period for Toronto-based Hydro One, Ontario’s biggest distributor and transmitter of electricity, with large-scale storm restoration efforts underscoring its role.

Hydro One’s former CEO and board of directors departed last year under pressure from a new Ontario government, the utility’s biggest shareholder. Earlier this year, the company’s plan for a $6.7-billion takeover fell apart over concerns of political interference and the utility clashed with the new provincial government and Progressive Conservative Premier Doug Ford over executive compensation levels, amid rate policy debates such as no peak rate cuts for self-isolating customers.

Hydro One facing $885 million charge as regulator upholds tax decision forcing it to share savings with customers

Shares of Hydro One were up more than eight per cent year-to-date on Wednesday, closing at $21.74. However, the stock price was up only six per cent from Hydro One’s 2015 initial public offering price, something its incoming CEO seems set on changing.

“One of my first priorities will be to solidify the executive team and build relationships with the Government of Ontario, our customers, informed by customer flexibility research, and communities, indigenous leaders, investors, and our partners across the electricity sector,” Poweska said Thursday on a conference call outlining Hydro One’s first-quarter results. “At the same time, I will be working to earn the trust and confidence of the investment community.”

Hydro One reported a profit of $171 million for the three months ended March 31, while peers such as Hydro-Québec reported pandemic-related losses as the sector adapted. Net income for the first quarter was down from $222 million a year earlier, which was due to $140 million in costs related to the scrapping of Hydro One’s proposed acquisition of U.S. energy company Avista Corp.

Hydro One Ltd. appointed Mark Poweska as President and CEO.

In January, Hydro One said the proposed takeover of Spokane, Wash.-headquartered Avista, an approximately $6.7-billion deal announced in July 2017, was being called off. As a result, Hydro One said it would pay Avista a US$103 million break fee.

Revenues net of purchased power for the first quarter rose to $952 million, up by 15.4 per cent compared to last year, Hydro One said, helped by higher distribution revenues. Adjusted profit for the quarter, which removes the Avista-related costs, was $311 million, up from $210 million a year ago.

The company is hiking its quarterly dividend to 24.15 cents per share, up five per cent from the last increase in May 2018, while also launching a pandemic relief fund for customers.

Poweska is taking over for acting president and CEO Paul Dobson this month, and the new executive will be charged with revamping Hydro One’s C-suite.

The company’s chief operating officer, chief legal officer, and chief corporate development officer have all departed this year. The company’s chief human resource officer has retired as well, although Poweska did announce Thursday that he had appointed acting chief financial officer Chris Lopez as CFO.

“Hydro One’s significant bench strength and management depth will ensure stability and continuity during this period of transition, as the sector pursues Hydro-Québec energy transition as well,” the company said in its first-quarter earnings press release.

Ontario remains Hydro One’s biggest shareholder, owning approximately 47 per cent of the company.

 

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Soaring Electricity And Coal Use Are Proving Once Again, Roger Pielke Jr's "Iron Law Of Climate"

Global Electricity Demand Surge underscores rising coal generation, lagging renewables deployment, and escalating emissions, as nations prioritize reliable power; nuclear energy and grid decarbonization emerge as pivotal solutions to the electricity transition.

 

Key Points

A rapid post-lockdown rise in power consumption, outpacing renewables growth and driving higher coal use and emissions.

✅ Coal generation rises faster than wind and solar additions

✅ Emissions increase as economies prioritize reliable baseload power

✅ Nuclear power touted for rapid grid decarbonization

 

By Robert Bryce

As the Covid lockdowns are easing, the global economy is recovering and that recovery is fueling blistering growth in electricity use. The latest data from Ember, the London-based “climate and energy think tank focused on accelerating the global electricity transition,” show that global power demand soared by about 5% in the first half of 2021. That’s faster growth than was happening back in 2018 when electricity use was increasing by about 4% per year.

The numbers from Ember also show that despite lots of talk about the urgent need to reduce greenhouse gas emissions, coal demand for power generation continues to grow and emissions from the electric sector continue to grow: up by 5% over the first half of 2019. In addition, they show that while about half of the growth in electricity demand was met by wind and solar, as low-emissions sources are set to cover almost all new demand over the next three years, overall growth in electricity use is still outstripping the growth in renewables. 

The soaring use of electricity, and increasing emissions from power generation confirm the sage wisdom of Rasheed Wallace, the volatile former power forward with the Detroit Pistons and other NBA teams, and now an assistant coach at the  University of Memphis, who coined the catchphrase: “Ball don’t lie.” If Wallace or one of his teammates was called for a foul during a basketball game that he thought was undeserved, and the opposing player missed the ensuing free throws, Wallace would often holler, “ball don’t lie,” as if the basketball itself was pronouncing judgment on the referee’s errant call. 

I often think about Wallace’s catchphrase while looking at global energy and power trends and substitute my own phrase: numbers don’t lie.

Over the past few weeks Ember, BP, and the International Energy Agency have all published reports which come to the same two conclusions: that countries all around the world — and China's electricity sector in particular — are doing whatever they need to do to get the electricity they need to grow their economies. Second, they are using lots of coal to get that juice. 

As I discuss in my recent book, A Question of Power: Electricity and the Wealth of Nations, Electricity is the world’s most important and fastest-growing form of energy. The Ember data proves that. At a growth rate of 5%, global electricity use will double in about 14 years, and as surging electricity demand is putting power systems under strain around the world, the electricity sector also accounts for the biggest single share of global carbon dioxide emissions: about 25 percent. Thus, if we are to have any hope of cutting global emissions, the electricity sector is pivotal. Further, the soaring use of electricity shows that low-income people and countries around the world are not content to stay in the dark. They want to live high-energy lives with access to all the electronic riches that we take for granted.  

 Ember’s data clearly shows that decarbonizing the global electric grid will require finding a substitute for coal. Indeed, coal use may be plummeting in the U.S. and western Europe, where U.S. electricity consumption has been declining, but over the past two years, several developing countries including Mongolia, China, Bangladesh, Vietnam, Kazakhstan, Pakistan, and India, all boosted their use of coal. This was particularly obvious in China, where, between the first half of 2019 and the first half of 2021, electricity demand jumped by about 14%. Of that increase, coal-fired generation provided roughly twice as much new electricity as wind and solar combined. In Pakistan, electricity demand jumped by about 7%, and coal provided more than three times as much new electricity as nuclear and about three times as much as hydro. (Wind and solar did not grow at all in Pakistan over that period.) 

Hate coal all you like, but its century-long persistence in power generation proves its importance. That persistence proves that climate change concerns are not as important to most consumers and policymakers as reliable electricity. In 2010, Roger Pielke Jr. dubbed this the Iron Law of Climate Policy which says “When policies on emissions reductions collide with policies focused on economic growth, economic growth will win out every time.” Pielke elaborated on that point, saying the Iron Law is a “boundary condition on policy design that is every bit as limiting as is the second law of thermodynamics, and it holds everywhere around the world, in rich and poor countries alike. It says that even if people are willing to bear some costs to reduce emissions (and experience shows that they are), they are willing to go only so far.”

Over the past five years, I’ve written a book about electricity, co-produced a feature-length documentary film about it (Juice: How Electricity Explains the World), and launched a podcast that focuses largely on energy and power. I’m convinced that Pielke’s claim is exactly right and should be extended to electricity and dubbed the Iron Law of Electricity which says, “when forced to choose between dirty electricity and no electricity, people will choose dirty electricity every time.” I saw this at work in electricity-poor places all over the world, including India, Lebanon, and Puerto Rico. 

Pielke, a professor at the University of Colorado as well as a highly regarded author on the politics of climate change and sports governance, has since elaborated on the Iron Law. During an interview in Juice, he explained it thusly: “The Iron Law says we’re not going to reduce emissions by willingly getting poor. Rich people aren't going to want to get poorer, poor people aren't going to want to get poorer.” He continued, “If there is one thing that we can count on it is that policymakers will be rewarded by populations if they make people wealthier. We're doing everything we can to try to get richer as nations, as communities, as individuals. If we want to reduce emissions, we really have only one place to go and that's technology.”

Pielke’s point reminds me of another of my favorite energy analysts, Robert Rapier, who made a salient point in his Forbes column last week. He wrote, “Despite the blistering growth rate of renewables, it’s important to keep in mind that overall global energy consumption is growing. Even though global renewable energy consumption has increased by about 21 exajoules in the past decade, overall energy consumption has increased by 51 exajoules. Increased fossil fuel consumption made up most of this growth, with every category of fossil fuels showing increased consumption over the decade.” 

The punchline here – despite my tangential reference to Rasheed Wallace — is obvious: The claims that massive reductions in global carbon dioxide emissions must happen soon are being mocked by the numbers. Countries around the world are acting in their interest, particularly when it comes to their electricity needs and that is resulting in big increases in emissions. As Ember concludes in their report, wind and solar are growing, and some analyses suggest renewables could eclipse coal by 2025, but the “electricity transition” is “not happening fast enough.”

Ember explains that in the first half of 2021, wind and solar output exceeded the output of the world’s nuclear reactors for the first time. It also noted that over the past two years, “Nuclear generation fell by 2% compared to pre-pandemic levels, as closures at older plants across the OECD, especially amid debates over European nuclear trends, exceeded the new capacity in China.” While that may cheer anti-nuclear activists at groups like Greenpeace and Friends of the Earth, the truth is obvious: the only way – repeat, the only way – the electric sector will achieve significant reductions in carbon dioxide emissions is if we can replace lots of coal-fired generation with nuclear reactors and do so in relatively short order, meaning the next decade or so. Renewables are politically popular and they are growing, but they cannot, will not, be able to match the soaring demand for the electricity that is needed to sustain modern economies and bring developing countries out of the darkness and into modernity. 

Countries like China, Vietnam, India, and others need an alternative to coal for power generation. They need new nuclear reactors that are smaller, safer, and cheaper than the existing designs. And they need it soon. I will be writing about those reactors in future columns.

 

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A new material made from carbon nanotubes can generate electricity by scavenging energy from its environment

Carbon Nanotube Solvent Electricity enables wire-free electrochemistry as organic solvents like acetonitrile pull electrons, powering alcohol oxidation and packed bed reactors, energy harvesting, and micro- and nanoscale robots via redox-driven current.

 

Key Points

Solvent-driven electron extraction from carbon nanotube particles generates current for electrochemistry.

✅ 0.7 V per particle via solvent-induced electron flow

✅ Packed bed reactors drive alcohol oxidation without wires

✅ Scalable for micro- and nanoscale robots; energy harvesting

 

MIT engineers have discovered a new way of generating electricity, alongside advances in renewable power at night that broaden what's possible, using tiny carbon particles that can create a current simply by interacting with liquid surrounding them.

The liquid, an organic solvent, draws electrons out of the particles, generating a current, unlike devices based on a cheap thermoelectric material that rely on heat, that could be used to drive chemical reactions or to power micro- or nanoscale robots, the researchers say.

"This mechanism is new, and this way of generating energy is completely new," says Michael Strano, the Carbon P. Dubbs Professor of Chemical Engineering at MIT. "This technology is intriguing because all you have to do is flow a solvent through a bed of these particles. This allows you to do electrochemistry, but with no wires."

In a new study describing this phenomenon, the researchers showed that they could use this electric current to drive a reaction known as alcohol oxidation—an organic chemical reaction that is important in the chemical industry.

Strano is the senior author of the paper, which appears today in Nature Communications. The lead authors of the study are MIT graduate student Albert Tianxiang Liu and former MIT researcher Yuichiro Kunai. Other authors include former graduate student Anton Cottrill, postdocs Amir Kaplan and Hyunah Kim, graduate student Ge Zhang, and recent MIT graduates Rafid Mollah and Yannick Eatmon.

Unique properties
The new discovery grew out of Strano's research on carbon nanotubes—hollow tubes made of a lattice of carbon atoms, which have unique electrical properties. In 2010, Strano demonstrated, for the first time, that carbon nanotubes can generate "thermopower waves." When a carbon nanotube is coated with layer of fuel, moving pulses of heat, or thermopower waves, travel along the tube, creating an electrical current that exemplifies turning thermal energy into electricity in nanoscale systems.

That work led Strano and his students to uncover a related feature of carbon nanotubes. They found that when part of a nanotube is coated with a Teflon-like polymer, it creates an asymmetry, distinct from conventional thermoelectric materials approaches, that makes it possible for electrons to flow from the coated to the uncoated part of the tube, generating an electrical current. Those electrons can be drawn out by submerging the particles in a solvent that is hungry for electrons.

To harness this special capability, the researchers created electricity-generating particles by grinding up carbon nanotubes and forming them into a sheet of paper-like material. One side of each sheet was coated with a Teflon-like polymer, and the researchers then cut out small particles, which can be any shape or size. For this study, they made particles that were 250 microns by 250 microns.

When these particles are submerged in an organic solvent such as acetonitrile, the solvent adheres to the uncoated surface of the particles and begins pulling electrons out of them.

"The solvent takes electrons away, and the system tries to equilibrate by moving electrons," Strano says. "There's no sophisticated battery chemistry inside. It's just a particle and you put it into solvent and it starts generating an electric field."

Particle power
The current version of the particles can generate about 0.7 volts of electricity per particle. In this study, the researchers also showed that they can form arrays of hundreds of particles in a small test tube. This "packed bed" reactor, unlike thin-film waste-heat harvesters for electronics, generates enough energy to power a chemical reaction called an alcohol oxidation, in which an alcohol is converted to an aldehyde or a ketone. Usually, this reaction is not performed using electrochemistry because it would require too much external current.

"Because the packed bed reactor is compact, it has more flexibility in terms of applications than a large electrochemical reactor," Zhang says. "The particles can be made very small, and they don't require any external wires in order to drive the electrochemical reaction."

In future work, Strano hopes to use this kind of energy generation to build polymers using only carbon dioxide as a starting material. In a related project, he has already created polymers that can regenerate themselves using carbon dioxide as a building material, in a process powered by solar energy and informed by devices that generate electricity at night as a complement. This work is inspired by carbon fixation, the set of chemical reactions that plants use to build sugars from carbon dioxide, using energy from the sun.

In the longer term, this approach could also be used to power micro- or nanoscale robots. Strano's lab has already begun building robots at that scale, which could one day be used as diagnostic or environmental sensors. The idea of being able to scavenge energy from the environment, including approaches that produce electricity 'out of thin air' in ambient conditions, to power these kinds of robots is appealing, he says.

"It means you don't have to put the energy storage on board," he says. "What we like about this mechanism is that you can take the energy, at least in part, from the environment."

 

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Hydro-Québec to Invest $750 Million in Carillon Generating Station

Hydro-Québec Carillon Refurbishment delivers a $750M hydropower modernization, replacing six turbines and upgrading civil works, water passageways, and grid equipment to extend run-of-river, renewable energy output for peak demand near Montréal.

 

Key Points

A $750M project replacing six units and upgrading civil, water and electrical systems to supply power for 50 years.

✅ Replaces six generating units with Andritz turbines.

✅ Upgrades civil works, water passageways, and electrical gear.

✅ Extends run-of-river output for 50 years; boosts peak supply.

 

Hydro-Québec will invest $750 million to refurbish its Carillon generating station with a major powerhouse upgrade that will mainly replace six generating units. The investment also covers the cost of civil engineering work, including making adjustments to water passageways, upgrading electrical equipment and replacing the station roof. Work will start in 2021, aligning with Hydro-Québec's capacity expansion plans for 2021, and continue until 2027.

Carillon generating station is a run-of-river power plant consisting of 14 generating units with a total installed capacity of 753 MW. Built in the early 1960s, it is a key part of Hydro-Québec's hydroelectric generating fleet, which includes the La Romaine complex as well. The station is close to the greater Montréal area and feeds power into the grid to support industrial demand growth during peak consumption periods.

The selected supplier, turbine manufacturer Andritz, has been asked to maximize the project's economic spinoffs in Québec, as Canada continues investing in new turbines across the country to modernize assets. Once the work is completed, the new generating units will be able to provide clean, renewable energy, supporting Hydro-Québec's strategy to reduce fossil fuel reliance for the next 50 years.

"Carillon generating station is a symbol of our hydroelectric development and plays a strategic role in our production fleet. However, most of the generating units' main components date back to the station's original construction from 1959 to 1962. Hydropower generating stations have long service lives - with this refurbishment, Carillon will be producing clean renewable energy for decades to come." said David Murray, Chief Innovation Officer and President, Hydro-Québec Production.

"In light of today's economic situation, this is an important announcement that clearly reaffirms Hydro-Québec's role in relaunching Québec's economy and strengthening interprovincial electricity partnerships that open new markets. Over 600,000 hours of work will be required for everything from the engineering work to component assembly, creating many new high-quality skilled jobs for Québec industries."

 

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