Ontario announces SMR plans to four reactors at Darlington

Global Energy Investment Decline risks future oil and electricity supply, says the IEA, as spending on upstream, coal plants, and grids falls while renewables, storage, and flexible generation lag in the energy transition.

Key Points

Multi-year cuts to oil, power, and grid spending that increase risks of future supply shortages and market tightness.

✅ IEA warns underinvestment risks oil supply squeeze

✅ China and India slow coal plant additions; renewables rise

✅ Batteries aid flexibility but cannot replace seasonal storage

An almost 20 per cent fall in global energy investment over the past three years could lead to oil and electricity shortages, as surging electricity demand persists, and there are concerns about whether current business models will encourage sufficient levels of spending in the future, according a new report.

The International Energy Agency’s second annual IEA benchmark analysis of energy investment found that while the world spent $US1.7 trillion ($2.2 trillion) on fossil-fuel exploration, new power plants and upgrades to electricity grids last year, with electricity investment surpassing oil and gas even as global energy investment was down 12 per cent from a year earlier and 17 per cent lower than 2014.

While the IEA said continued oversupply of oil and electricity globally would prevent any imminent shock, falling investment “points to a risk of market tightness and undercapacity at some point down the line’’.

The low crude oil price drove a 44 per cent drop in oil and gas investment between 2014 and 2016. It fell 26 per cent last year. It was due to falls in upstream activity and a slowdown in the sanctioning of conventional oilfields to the lowest level in more than 70 years.

“Given the depletion of existing fields, the pace of investment in conventional fields will need to rise to avoid a supply squeeze, even on optimistic assumptions about technology and the impact of climate policies on oil demand,’’ the IEA warned in its report released yesterday evening. “The energy transition has barely begun in several key sectors, such as transport and industry, which will continue to rely heavily on oil, gas and coal for the foreseeable future.’’

The fall in global energy spending also reflected declining investment in power generation, particularly from coal plants.

While 21 per cent of global ­energy investment was made by China in 2016, the world’s fastest growing economy had a 25 per cent decline in the commissioning of new coal-fired power plants, due largely to air pollution issues and investment in renewables.

Investment in new coal-fired plants also fell in India.

“India and China have slammed the brakes on coal-fired generation. That is the big change we have seen globally,’’ said ­Bruce Mountain a director at CME Australia.

“What it confirms is the ­pressures and the changes we are seeing in Australia, the restructuring of our energy supply, is just part of a global trend. We are facing the pressures more sharply in Australia because our power prices are very high. But that same shift in energy source in Australia are being mirrored internationally.’’ The IEA — a Paris-based adviser to the OECD on energy policy — also highlighted Australia’s reduced power reserves in its report and called for regulatory change to encourage greater use of renewables.

“Australia has one of the highest proportions of households with PV systems on their roof of any country in the world, and its ­electricity use in its National ­Electricity Market is spread out over a huge and weakly connected network,’’ the report said.

“It appears that a series of accompanying investments and regulatory changes are needed, including a plan to avoid supply threats, to use Australia’s abundant wind and solar potential: changing system operation methods and reliability procedures as well as investment into network capacity, flexible generation and storage.’’ The report found that in Australia there had been an increase in grid-scale installations mostly associated with large-scale solar PV plants.

Last month the Turnbull ­government revealed it was prepared to back the construction of new coal-fired power stations to prevent further shortfalls in electricity supplies, while the PM ruled out taxpayer-funded plants and declared it was open to using “clean coal” technology to replace existing generators.

He also pledged “immediate” ­action to boost the supply of gas by forcing exporters to divert ­production into the domestic ­market.

Since then technology billionaire Elon Musk has promised to solve South Australia’s energy ­issues by building the world’s largest lithium-ion battery in the state.

But the IEA report said batteries were unlikely to become a “one size fits all” single solution to ­electricity security and flexibility provision.

“While batteries are well-suited to frequency control and shifting hourly load, they cannot provide seasonal storage or substitute the full range of technical services that conventional plants provide to stabilise the system,’’ the report said.

“In the absence of a major technological breakthrough, it is most likely that batteries will complement rather than substitute ­conventional means of providing system flexibility. While conventional plants continue to provide essential system services, their business model is increasingly being called into question in ­unbundled systems.’’

Related News

• Electricity Forum News

• Energy Policy News

Site C Dam Injunction signals Ottawa's neutrality while B.C. reviews a hydroelectric dam project on the Peace River, amid First Nations treaty rights claims, federal approval defenses, and scrutiny of environmental assessment and Crown consultation.

Key Points

A legal request to pause Site C while courts weigh First Nations treaty rights, environmental review, and approvals.

✅ Ottawa neutral on injunction; still defends federal approvals

✅ First Nations cite treaty rights over Peace River territory

✅ B.C. jurisdiction, environmental assessment and Crown consultation at issue

The federal government is not going to argue against halting construction of the controversial Site C hydroelectric dam in British Columbia while a B.C. court decides if the project violates constitutionally protected treaty rights.

Work on Site C suspended prior to First Nations lawsuit

However a spokeswoman for Environment Minister Catherine McKenna said Monday the government will continue to defend the federal approval given for the project in December 2014, even though that approval was given using an environmental review process McKenna herself has said is fundamentally flawed.

The Site C project is an 1,100-megawatt dam and generating station on the Peace River in northern B.C. that will flood parts of the traditional territory of the West Moberly and Prophet River First Nations.

#google#

In January, they filed a civil court case against the provincial government, B.C. Hydro and the federal government asking a judge to decide if their rights were being violated by the dam. A few weeks later, West Moberly asked the court for an injunction to halt construction pending the outcome of the rights case, similar to other contested transmission projects like the Maine electricity corridor debate in New England.

On May 11, lawyers for Attorney General Jody Wilson-Raybould filed a notice that Canada would remain neutral on the question of the injunction, meaning Canada won't argue against the idea of postponing construction for months, if not years, while the rights case winds through the court.

Wilson-Raybould has been silent on Site C since being named Canada's minister of justice in 2015, but in 2012, when she was the B.C. regional chief for the Assembly of First Nations, she said the project was "running roughshod" over treaty rights. The Justice Department on Monday directed questions to Environment and Climate Change Canada.

Defence of environmental assessment

McKenna's spokeswoman, Caroline Theriault, said the injunction request is just a procedural step regarding construction and that it is B.C. jurisdiction not federal.

However, she said Canada will defend the environmental assessment and Crown consultation processes and the federally issued permits required for construction.

B.C. auditor general set to scrutinize Site C dam project

McKenna has legislation before the House of Commons to overhaul the process for environmental assessment of major projects like hydro dams and pipelines, arguing the former government's procedures had skewed too far towards proponents. The overhaul includes requiring traditional Indigenous knowledge be taken into account, a consideration also central to the Columbia River Treaty talks underway on both sides of the border.

However, Theriault said the commitment to overhaul the process also included a promise not to revisit projects that had already been approved, such as Site C.

"The federal environmental assessment process for the Site C project has already been upheld in other court actions," said Theriault.

'It feels kind of odd'

West Moberly Chief Roland Wilson said he was both excited and yet concerned by Canada's decision last week not to oppose the injunction.

"It feels kind of odd and makes me wonder what they're up to," Wilson said.

However he said all he has ever wanted was for the project to be stopped until the question of rights can be answered. Wilson said two previous dams on the Peace River already flooded 80 per cent of the functional land within West Moberly's territory and that Site C will flood half of what's left. That land is used for fishing and hunting and there is also concern the dam will allow mercury to leak into Moberly Lake, he said.

Retiree undaunted by steep odds against his petition to stop Site C dam

Construction began in 2015 and more than $2.4 billion has already been spent on a project that will at the earliest, not be completed until 2024 and will cost an estimated $10 billion total, with cost overrun risks underscored by the Muskrat Falls ratepayer agreement in Atlantic Canada.

The province continues to argue against the injunction and will also fight the rights case, even as Alberta suspends power purchase talks with B.C. over energy disputes. Premier John Horgan campaigned on a promise to review the Site C approval. A B.C. Utilities Commission report in November found there are alternatives to building it and that it will go over budget. Nevertheless Horgan in December said he had to let construction continue because cancelling the project would be too costly both for the province and its electricity consumers, despite the B.C. rate freeze announced around the same period.

Related News

• Electricity Forum News

• Overhead T&D News

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.

Sign up for our Coronavirus Updates newsletter to track the outbreak. All stories linked in the newsletter are free to access.

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.”

Related News

• Electricity Forum News

• Renewable Energy News

Nighttime Thermoelectric Generator converts radiative cooling into renewable energy, leveraging outer space cold; a Stanford-UCLA prototype complements solar, serving off-grid loads with low-power output during peak evening demand, using simple materials on a rooftop.

Key Points

A device converting nighttime radiative cooling into electricity, complementing solar for low-power evening needs.

✅ Uses thermocouples to convert temperature gradients to voltage.

✅ Exploits radiative cooling to outer space for night power.

✅ Complements solar; low-cost parts suit off-grid applications.

Two years ago, one freezing December night on a California rooftop, a tiny light shone weakly with a little help from the freezing night air. It wasn't a very bright glow. But it was enough to demonstrate the possibility of generating renewable power after the Sun goes down.

Working with Stanford University engineers Wei Li and Shanhui Fan, University of California Los Angeles materials scientist Aaswath Raman put together a device that produces a voltage by channelling the day's residual warmth into cooling air, effectively generating electricity from thin air with passive heat exchange.

"Our work highlights the many remaining opportunities for energy by taking advantage of the cold of outer space as a renewable energy resource," says Raman.

"We think this forms the basis of a complementary technology to solar. While the power output will always be substantially lower, it can operate at hours when solar cells cannot."

For all the merits of solar energy, it's just not a 24-7 source of power, although research into nighttime solar cells suggests new possibilities for after-dark generation. Sure, we can store it in a giant battery or use it to pump water up into a reservoir for later, but until we have more economical solutions, nighttime is going to be a quiet time for renewable solar power. 

Most of us return home from work as the Sun is setting, and that's when energy demands spike to meet our needs for heating, cooking, entertaining, and lighting.

Unfortunately, we often turn to fossil fuels to make up the shortfall. For those living off the grid, it could require limiting options and going without a few luxuries.

Shanhui Fan understands the need for a night time renewable power source well. He's worked on a number of similar devices, including carbon nanotube generators that scavenge ambient energy, and a recent piece of technology that flipped photovoltaics on its head by squeezing electricity from the glow of heat radiating out of the planet's Sun-warmed surface.

While that clever item relied on the optical qualities of a warm object, this alternative device makes use of the good old thermoelectric effect, similar to thin-film waste-heat harvesting approaches now explored.

Using a material called a thermocouple, engineers can convert a change in temperature into a difference in voltage, effectively turning thermal energy into electricity with a measurable voltage. This demands something relatively toasty on one side and a place for that heat energy to escape to on the other.

The theory is the easy part – the real challenge is in arranging the right thermoelectric materials in such a way that they'll generate a voltage from our cooling surrounds that makes it worthwhile.

To keep costs down, the team used simple, off-the-shelf items that pretty much any of us could easily get our hands on.

They put together a cheap thermoelectric generator and linked it with a black aluminium disk to shed heat in the night air as it faced the sky. The generator was placed inside a polystyrene enclosure sealed with a window transparent to infrared light, and linked to a single tiny LED.

For six hours one evening, the box was left to cool on a roof-top in Stanford as the temperature fell just below freezing. As the heat flowed from the ground into the sky, the small generator produced just enough current to make the light flicker to life.

At its best, the device generated around 0.8 milliwatts of power, corresponding to 25 milliwatts of power per square metre.

That might just be enough to keep a hearing aid working. String several together and you might just be able to keep your cat amused with a simple laser pointer. So we're not talking massive amounts of power.

But as far as prototypes go, it's a fantastic starting point. The team suggests that with the right tweaks and the right conditions, 500 milliwatts per square metre isn't out of the question.

"Beyond lighting, we believe this could be a broadly enabling approach to power generation suitable for remote locations, and anywhere where power generation at night is needed," says Raman.

While we search for big, bright ideas to drive the revolution for renewables, it's important to make sure we don't let the smaller, simpler solutions like these slip away quietly into the night.

This research was published in Joule.

Related News

• Electricity Forum News

• Power Generation News

Sulphur Hexafluoride (SF6) Emissions drive rising greenhouse gas impacts in electrical switchgear, power grids, and renewables, with extreme global warming potential, long atmospheric lifetime, and leakage risks challenging climate targets and grid decarbonization.

Key Points

SF6 emissions are leaks from electrical switchgear and grids, a high-GWP gas with ~1,000-year lifetime.

✅ 23,500x CO2 global warming potential (GWP)

✅ Leaks from switchgear, breakers, gas-insulated substations

✅ Clean air and vacuum alternatives emerging for MV/HV

Sulphur hexafluoride, or SF6, is widely used in the electrical industry to prevent short circuits and accidents.

But leaks of the little-known gas in the UK and the rest of the EU in 2017 were the equivalent of putting an extra 1.3 million cars on the road.

Levels are rising as an unintended consequence of the green energy boom and the broader global energy transition worldwide.

Cheap and non-flammable, SF6 is a colourless, odourless, synthetic gas. It makes a hugely effective insulating material for medium and high-voltage electrical installations.

It is widely used across the industry, from large power stations to wind turbines to electrical sub-stations in towns and cities.

It prevents electrical accidents and fires.

However, the significant downside to using the gas is that it has the highest global warming potential of any known substance. It is 23,500 times more warming than carbon dioxide (CO2).

Just one kilogram of SF6 warms the Earth to the same extent as 24 people flying London to New York return.

It also persists in the atmosphere for a long time, warming the Earth for at least 1,000 years.

So why are we using more of this powerful warming gas?

The way we make electricity around the world is changing rapidly, with New Zealand's push to electrify in its energy system.

Where once large coal-fired power stations brought energy to millions, the drive to combat climate change and to move away from coal means they are now being replaced by mixed sources of power including wind, solar and gas.

This has resulted in many more connections to the electricity grid, and with EU electricity use could double by 2050, a rise in the number of electrical switches and circuit breakers that are needed to prevent serious accidents.

Collectively, these safety devices are called switchgear. The vast majority use SF6 gas to quench arcs and stop short circuits.

"As renewable projects are getting bigger and bigger, we have had to use it within wind turbines specifically," said Costa Pirgousis, an engineer with Scottish Power Renewables on its new East Anglia wind farm, which doesn't use SF6 in turbines.

"As we are putting in more and more turbines, we need more and more switchgear and, as a result, more SF6 is being introduced into big turbines off shore.

"It's been proven for years and we know how it works, and as a result it is very reliable and very low maintenance for us offshore."

How do we know that SF6 is increasing?

Across the entire UK network of power lines and substations, there are around one million kilograms of SF6 installed.

A study from the University of Cardiff found that across all transmission and distribution networks, the amount used was increasing by 30-40 tonnes per year.

This rise was also reflected across Europe with total emissions from the 28 member states in 2017 equivalent to 6.73 million tonnes of CO2. That's the same as the emissions from 1.3 million extra cars on the road for a year.

Researchers at the University of Bristol who monitor concentrations of warming gases in the atmosphere say they have seen significant rises in the last 20 years.

"We make measurements of SF6 in the background atmosphere," said Dr Matt Rigby, reader in atmospheric chemistry at Bristol.

"What we've seen is that the levels have increased substantially, and we've seen almost a doubling of the atmospheric concentration in the last two decades."

How does SF6 get into the atmosphere?

The most important means by which SF6 gets into the atmosphere is from leaks in the electricity industry.

Electrical company Eaton, which manufactures switchgear without SF6, says its research indicates that for the full life-cycle of the product, leaks could be as high as 15% - much higher than many other estimates.

Louis Schaeffer, electrical business manager at Eaton, said: "The newer gear has very low leak rates but the key question is do you have newer gear?

"We looked at all equipment and looked at the average of all those leak rates, and we didn't see people taking into account the filling of the gas. Plus, we looked at how you recycle it and return it and also included the catastrophic leaks."

How damaging to the climate is this gas?

Concentrations in the atmosphere are very small right now, just a fraction of the amount of CO2 in the air.

However, the global installed base of SF6 is expected to grow by 75% by 2030, as data-driven electricity demand surges worldwide.

Another concern is that SF6 is a synthetic gas and isn't absorbed or destroyed naturally. It will all have to be replaced and destroyed to limit the impact on the climate.

Developed countries are expected to report every year to the UN on how much SF6 they use, but developing countries do not face any restrictions on use.

Right now, scientists are detecting concentrations in the atmosphere that are 10 times the amount declared by countries in their reports. Scientists say this is not all coming from countries like India, China and South Korea.

One study found that the methods used to calculate emissions in richer countries "severely under-reported" emissions over the past two decades.

Why hasn't this been banned?

SF6 comes under a group of human-produced substances known as F-gases. The European Commission tried to prohibit a number of these environmentally harmful substances, including gases in refrigeration and air conditioning, back in 2014.

But they faced strong opposition from industries across Europe.

"In the end, the electrical industry lobby was too strong and we had to give in to them," said Dutch Green MEP Bas Eickhout, who was responsible for the attempt to regulate F-gases.

"The electric sector was very strong in arguing that if you want an energy transition, and you have to shift more to electricity, you will need more electric devices. And then you also will need more SF6.

"They used the argument that otherwise the energy transition would be slowed down."

What do regulator and electrical companies say about the gas?

Everyone is trying to reduce their dependence on the gas, and US control efforts suggest targeted policies can drive declines, as it is universally recognised as harmful to the climate.

In the UK, energy regulator Ofgem says it is working with utilities to try to limit leaks of the gas.

"We are using a range of tools to make sure that companies limit their use of SF6, a potent greenhouse gas, where this is in the interest of energy consumers," an Ofgem spokesperson told BBC News.

"This includes funding innovation trials and rewarding companies to research and find alternatives, setting emissions targets, rewarding companies that beat those targets, and penalising those that miss them."

Are there alternatives - and are they very expensive?

The question of alternatives to SF6 has been contentious over recent years.

For high-voltage applications, experts say there are very few solutions that have been rigorously tested.

"There is no real alternative that is proven," said Prof Manu Haddad from the school of engineering at Cardiff University.

"There are some that are being proposed now but to prove their operation over a long period of time is a risk that many companies don't want to take."

Medium voltage operations there are several tried-and-tested materials. Some in the industry say that the conservative nature of the electrical industry is the key reason that few want to change to a less harmful alternative.

"I will tell you, everyone in this industry knows you can do this; there is not a technical reason not to do it," said Louis Schaffer from Eaton.

"It's not really economic; it's more a question that change takes effort and if you don't have to, you won't do it."

Some companies are feeling the winds of change

Sitting in the North Sea some 43km from the Suffolk coast, Scottish Power Renewables has installed one of world's biggest wind farms, in line with a sustainable electric planet vision, where the turbines will be free of SF6 gas.

East Anglia One will see 102 of these towering generators erected, with the capacity to produce up to 714MW (megawatts) of power by 2020, enough to supply half a million homes.

Previously, an installation like this would have used switchgear supplied with SF6, to prevent the electrical accidents that can lead to fires.

Each turbine would normally have contained around 5kg of SF6, which, if it leaked into the atmosphere, would add the equivalent of around 117 tonnes of carbon dioxide. This is roughly the same as the annual emissions from 25 cars.

"In this case we are using a combination of clean air and vacuum technology within the turbine. It allows us to still have a very efficient, reliable, high-voltage network but to also be environmentally friendly," said Costa Pirgousis from Scottish Power Renewables.

"Once there are viable alternatives on the market, there is no reason not to use them. In this case, we've got a viable alternative and that's why we are using it."

But even for companies that are trying to limit the use of SF6, there are still limitations. At the heart of East Anglia One sits a giant offshore substation to which all 102 turbines will connect. It still uses significant quantities of the highly warming gas.

What happens next ?

The EU will review the use of SF6 next year and will examine whether alternatives are available. However, even the most optimistic experts don't think that any ban is likely to be put in place before 2025.

Related News

• Electricity Forum News

• Climate Change News

Nissan V2G Parking lets EV drivers pay with electricity via bidirectional charging at the Yokohama Nissan Pavilion, showcasing vehicle-to-grid, smart energy trading, and integrated mobility experiences like Ariya rides and Formula E simulators.

Key Points

A program where EV owners use V2G to pay for parking by discharging power at Nissan's Yokohama Pavilion.

✅ Pay for parking with EV energy via V2G

✅ Powered by Nissan LEAFs and solar at the Pavilion

✅ Showcases Ariya, Formula E, ProPILOT, and I2V tech

Nissan is letting customers pay for parking with electricity by discharging power from their electric car’s battery pack, a concept similar to how EV owners sell electricity back to the grid in other programs. In what the company claims to be a global first, owner of electric cars can trade energy for a parking space at Nissan Pavilion exhibition space in Yokohama, Japan, echoing how parked EVs earn from Europe's grids in comparable schemes.

The venue that showcases Nissan's future technologies, opened its doors to public on August 1 and will remain so through October 23, underscoring how stored EV energy can power buildings in broader applications. “(It) is a place where customers can see, feel, and be inspired by (the company's) near-future vision for society and mobility," says CEO Makoto Uchida. “As the world shifts to electric mobility, EVs will be integrated into society in ways that go beyond just transportation."

Apart from the innovate parking experience, people visiting the pavilion can also virtually experience the thrill of Formula E electric street racing or go for a ride in the all-new Ariya electric crossover, similar to demos at the Everything Electric show in Vancouver. Other experiences include ProPILOT advanced driver assistance system as well as Nissan’s Invisible-to-Visible (I2V) technology, which combines information from the real and virtual worlds to assist drivers, themes also explored at an EV education centre in Toronto for public outreach.

A mobility hub in front of the Pavilion offers a variety of services including EV car-sharing. The Pavilion also operates a cafe operated on power supplied by Nissan LEAF electric cars and solar energy, showcasing vehicle-to-building charging benefits on site.

As part of its Nissan NEXT transformation plan, the company plans to expand its global lineup of EVs and aims to sell more than 1 million electrified vehicles a year by the end of fiscal 2023, aligning with the American EV boom and the challenge of scaling charging infrastructure.

Related News

• Electricity Forum News

• EV Infrastructure News