An Old Steel Mill Retools to Produce Clean Energy

By New York Times


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Empty grain elevators and dormant railroad tracks line the Buffalo River to the east and Lake Erie to the west, interspersed with empty fields overgrown with gnarled shrubbery. Test wells that monitor decades of buried industrial waste dot the landscape. A passenger ship, rust overtaking its aqua paint, sits beside a decaying mill.

The road from Buffalo to this city to the south offers a stark reminder of the regionÂ’s faded past as a hub of industry and shipping.

Yet in the past few months, a different sight has emerged on the 2.2-mile shoreline above a labyrinth of pipes, blackened buildings and crumbling coke ovens that was once home to a behemoth Bethlehem Steel plant: eight gleaming white windmills with 153-foot blades slowly turning in the wind off Lake Erie, on a former Superfund site where iron and steel slag and other industrial waste were dumped during 80 years of production.

“It’s changing the image of the city of Lackawanna,” said Norman L. Polanski Jr., the city’s mayor and a former Bethlehem worker who lost his job when the company stopped making steel here in 1983. “We were the old Rust Belt, with all the negatives. Right now, we are progressive and we are leading the way on the waterfront.”

Christine Real de Azua, of the American Wind Energy Association, said Steel Winds, as this wind farm is known, is the largest to rise in a city, and according to the state Department of Environmental Conservation, it is the first to rise on land overseen by New YorkÂ’s brownfields program. (Brownfields are low-level toxic waste sites concentrated mainly around abandoned factories.)

“It’s a way to convert the Rust Belt to the Wind Belt,” Ms. Real de Azua said.

The turbines, owned jointly by BQ Energy of Pawling, N.Y., and UPC Wind of Newton, Mass., are able to produce a total of 20 megawatts of electricity a year, enough to provide power to 7,000 homes, said the project manager, Mark Mitskovski. The companies involved in the project plan to sell the energy to individual customers or utilities.

The company began construction of the wind farm in September 2006, six months after the federal Environmental Protection Agency declared the site clean enough to be removed from the Superfund list, allowing the state Department of Environmental Conservation to oversee its development.

The windmills are a welcome change for an area buffeted by the loss of jobs and environmental problems since BethlehemÂ’s steep decline began in the mid-1970s as cheaper imported steel, mainly from Japan, began flooding the United States.

At its peak during World War II and through the boom years that followed, Bethlehem employed more than 20,000 people here, most living within walking distance of the plant. But as the jobs vanished, the cityÂ’s population fell from a high of 30,000 in the 1960s to about 19,000 today.

Smoke from the blast furnaces and coke ovens coated the mill town with a layer of red ore dust, and artificial clouds glowed several times each day, when rail cars tipped their loads of slag into Lake Erie, creating a lavalike flow visible from miles away.

“As a kid, we’d be at the beach and you’d see the ladle cars going out there 24 hours a day,” said Michael Malyak, of Lackawanna’s Steel Plant Museum, who was a shipping clerk at Bethlehem for eight years before becoming an elementary school teacher. “The sky would light up, and you’d see this red-hot slag rolling down the hillside.”

Mayor Polanski said that as dangerous and unhealthy as it was, “it was a way of life.”

And one that passed through generations. Like many of his classmates, Mr. Polanski, who is 58, followed his father to Bethlehem, getting hired as an apprentice pipe fitter.

“I graduated in June of ’67, and at the end of July, I had a job at the steel plant,” he said. “I never figured I’d lose that job.”

But as the lower-priced imported steel began to dominate the market, Bethlehem started to shrink. About 7,300 workers lost their jobs when the company stopped making steel in Lackawanna, leaving only the coke ovens and several finishing mills in operation.

Bethlehem ended coke production in 2001, the year the company filed for bankruptcy. A much smaller mill that finishes galvanized steel and employs about 250 is now operated by Mittal Steel, which acquired BethlehemÂ’s assets in 2005 in a merger with International Steel Group.

About $300,000 in state and federal assistance was used to research wind patterns and evaluate the environmental impact, and the windmills each cost $4.5 million to build. Power lines left from the plant carry the electricity from the turbines, while paved roads, rail lines and an industrial port built by Bethlehem were used to bring much of the construction material to the site.

“It’s much easier to do this on farmland somewhere,” Mr. Mitskovski said. “But all the things you would need to build in a green field setting are already here.”

Steel Winds has permits to build two more turbines and plans to put up as many as 27 in all. This month, local officials announced plans to move a rail line and build new roads in an effort to open 400 more acres of brownfields at the former Bethlehem site for redevelopment and to revitalize the Lake Erie port there, which is large enough to handle eight oceangoing ships at a time.

The economic effect of the wind farm on this city will never rival that of the steel giant. Mr. Mitskovski estimated that Steel Winds will ultimately employ a few dozen people, compared with the tens of thousands who punched the clock at Bethlehem. And though there are incentives for clean energy production, taxes generated by the wind farm will never match those paid by the steel mill, which at one time subsidized most of LackawannaÂ’s government.

The greatest effect of the eight windmills, however, may have more to do with attitude.

“A community that has had difficulty moving forward has accepted a technology that leapfrogs other forms of energy generation,” Mr. Mitskovski said. “Decades of steel-making created this environmental legacy. But that also created the opportunity to take this fallow, contaminated land and reuse it.”

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Green energy could drive Covid-19 recovery with $100tn boost

Renewable Energy Economic Recovery drives GDP gains, job growth, and climate targets by accelerating clean energy investment, green hydrogen, and grid modernization, delivering high ROI and a resilient, low-carbon transition through stimulus and policy alignment.

 

Key Points

A strategy to boost GDP and jobs by accelerating clean power and green hydrogen while meeting climate goals.

✅ Adds $98tn to global GDP by 2050; $3-$8 return per $1 invested

✅ Quadruples clean energy jobs to 42m; improves health and welfare

✅ Cuts CO2 70% by 2050; enables net-zero via green hydrogen

 

Renewable energy could power an economic recovery from Covid-19 through a green recovery that spurs global GDP gains of almost $100tn (£80tn) between now and 2050, according to a report.

The International Renewable Energy Agency’s new IRENA report found that accelerating investment in renewable energy could generate huge economic benefits while helping to tackle the global climate emergency.

The agency’s director general, Francesco La Camera, said the global crisis ignited by the coronavirus outbreak exposed “the deep vulnerabilities of the current system” and urged governments to invest in renewable energy to kickstart economic growth and help meet climate targets.

The agency’s landmark report found that accelerating investment in renewable energy would help tackle the climate crisis and would in effect pay for itself.

Investing in renewable energy would deliver global GDP gains of $98tn above a business-as-usual scenario by 2050, as clean energy investment significantly outpaces fossil fuels, by returning between $3 and $8 on every dollar invested.

It would also quadruple the number of jobs in the sector to 42m over the next 30 years, and measurably improve global health and welfare scores, according to the report.

“Governments are facing a difficult task of bringing the health emergency under control while introducing major stimulus and recovery measures, as a US power coalition demands action,” La Camera said. “By accelerating renewables and making the energy transition an integral part of the wider recovery, governments can achieve multiple economic and social objectives in the pursuit of a resilient future that leaves nobody behind.”

The report also found that renewable energy could curb the rise in global temperatures by helping to reduce the energy industry’s carbon dioxide emissions by 70% by 2050 by replacing fossil fuels, with measures like a fossil fuel lockdown hastening the shift.

Renewables could play a greater role in cutting carbon emissions from heavy industry and transport to reach virtually zero emissions by 2050, particularly by investing in green hydrogen.

The clean-burning fuel, which can replace the fossil fuel gas in steel and cement making, could be made by using vast amounts of clean electricity to split water into hydrogen and oxygen elements.

Andrew Steer, chief executive of the World Resources Institute, said: “As the world looks to recover from the current health and economic crises, we face a choice: we can pursue a modern, clean, healthy energy system, or we can go back to the old, polluting ways of doing business. We must choose the former.”

The call for a green economic recovery from the coronavirus crisis comes after a warning from Dr Fatih Birol, head of the International Energy Agency, that government policies must be put in place to avoid an investment hiatus in the energy transition, even as the solar and wind industry faces Covid-19 disruptions.

“We should not allow today’s crisis to compromise the clean energy transition, even as wind power growth persists despite Covid-19,” he said. “We have an important window of opportunity.”

Ignacio Galán, the chairman and CEO of the Spanish renewables giant Iberdrola, which owns Scottish Power, said the company would continue to invest billions in renewable energy as well as electricity networks and batteries to help integrate clean energy in the electricity.

“A green recovery is essential as we emerge from the Covid-19 crisis. The world will benefit economically, environmentally and socially by focusing on clean energy,” he said. “Aligning economic stimulus and policy packages with climate goals is crucial for a long-term viable and healthy economy.”

 

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Mercury in $3 billion takeover bid for Tilt Renewables

Mercury Energy Tilt Renewables acquisition signals a trans-Tasman energy push as PowAR and Mercury split assets via a scheme of arrangement, offering $7.80 per share and a $2.96b valuation across Australia and New Zealand.

 

Key Points

A PowAR-Mercury deal to buy Tilt Renewables, splitting Australian and New Zealand assets via a court-approved scheme.

✅ $7.80 per share, valuing Tilt at $2.96b

✅ PowAR takes AU assets; Mercury gets NZ business

✅ Infratil and Mercury to vote for the scheme

 

Mercury Energy and an Australian partner appear to have won the race to buy Tilt Renewables, an Australasian wind farm developer which was spun out of TrustPower, bidding almost $3 billion, amid wider utility consolidation such as the Peterborough Distribution sale to Hydro One.

Yesterday Tilt Renewables announced that it had entered a scheme implementation agreement under which it was proposed that PowAR would acquire its Australian business and Mercury would acquire the New Zealand business, mirroring cross-border approvals where U.S. antitrust clearance shaped Hydro One's bid for Avista.

Conducted through a scheme of arrangement, Tilt shareholders will be offered $7.80 a share, valuing Tilt at $2.96b.

Yesterday morning shares in Tilt opened about 18 per cent up at $7.65, though regulatory outcomes can swing valuations as seen when Hydro One-Avista reconsideration of a U.S. order came into play.

In early December Infratil, which owns around two thirds of Tilt's shares, announced it was undertaking a review of its investment after receiving approaches, with investor sentiment sensitive to governance shifts as when Hydro One shares fell after leadership changes in Ontario.

According to a report in the Australian Financial Review, the transtasman bid beat out other parties including ASX-listed APA Group, Canadian pension fund CDPQ and Australian fund manager Infrastructure Capital Group, as Canadian investors like Ontario Teachers' Plan pursue similar infrastructure deals.

“This compelling acquisition proposal is a result of Tilt Renewables’ constant focus on delivering long-term value for shareholders and the board is pleased that, with these new owners, the transition to renewables in Australia and New Zealand will continue to accelerate,” Tilt’s chairman Bruce Harker said.

Comparable community-led clean energy partnerships, such as initiatives with British Columbia First Nations highlighted in clean-energy generation, underscore the broader momentum.

Just prior to the announcement, Tilt shares had been trading for less than $4. Such repricing reflects how utilities can face perceived uncertainties, as one investor argued too many unknowns at the time.

Mercury is already Tilt’s second largest shareholder, at just under 20 per cent. Both Infratil and Mercury have agreed to vote in favour of the scheme. The deal values Tilt’s New Zealand business at $770m, however the value of Mercury’s existing shareholding is around $585m, meaning the company will increase debt by around $185m.

 

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Clorox accelerates goal of achieving 100% renewable electricity in the U.S. and Canada to 2021

Clorox Enel 70 MW VPPA accelerates renewable energy, sourcing Texas solar from the Roadrunner project to support 100% renewable electricity, Scope 2 reductions, and grid decarbonization through a virtual power purchase agreement starting in 2021.

 

Key Points

A 12-year virtual power purchase agreement for 70 MW of Texas solar to advance Clorox's 100% renewable electricity goal.

✅ 12-year contract supporting 100% renewable electricity by 2021

✅ Supplies 70 MW from Enel's Roadrunner solar project in Texas

✅ Cuts Scope 2 emissions via grid-delivered virtual PPA

 

The Clorox Company and a wholly owned subsidiary of Enel Green Power North America announced today the signing of a 12-year, 70 megawatt (MW) virtual power purchase agreement (VPPA) for the purchase of renewable energy, aligned with carbon-free electricity investments across the power sector beginning in 2021. Representing about half of Clorox's 100% renewable electricity goal in its operations in the U.S. and Canada, this agreement is expected to help Clorox accelerate achieving its goal in 2021, four years ahead of the company's original plan.

"Climate change and rising greenhouse gas emissions pose a real threat to the health of our planet and ultimately the long-term well-being of people globally. That's why we've taken action for more than 10 years to measure and reduce the carbon footprint of our operations," said Benno Dorer, chair and CEO, The Clorox Company. "Our agreement with Enel helps to expand U.S. renewable energy infrastructure, reflecting our view that companies like Clorox play an important role in addressing global climate change, as landmark policies like the U.S. climate deal further accelerate the transition. We believe this agreement will significantly contribute toward Clorox achieving our goal of 100% renewable electricity in our operations in the U.S. and Canada in 2021, four years earlier than originally planned. Our commitment to climate stewardship is an important pillar of our new IGNITE strategy and part of our overall efforts to drive Good Growth – growth that's profitable, sustainable and responsible."

The 70MW VPPA between Clorox and Enel Green Power North America for the purchase of renewable energy delivered to the electricity grid is for the second phase of Enel's Roadrunner solar project to be built in Texas, and complement global clean energy collaborations such as Canada-Germany hydrogen cooperation announced recently. Roadrunner is a 497-direct current megawatt (MWdc) solar project that is being built in two phases. The first phase, currently under construction, comprises around 252 MWdc and is expected to be completed by the end of 2019, while the remaining 245 MWdc of capacity is expected to be completed by the end of 2020. Once fully operational, the solar plant could generate up to 1.2 terawatt-hours (TWh) of electricity annually, while avoiding an estimated 800,000 metric tons of carbon dioxide emissions per year.

Based on the U.S. Environmental Protection Agency Greenhouse Gas Equivalencies Calculator[i], this VPPA is estimated to avoid approximately 140,000 metric tons of CO2 emissions each year. This is equivalent to the annual impact that 165,000 acres of U.S. forest can have in removing CO2 from the atmosphere, and illustrates why cleaning up Canada's electricity is central to emissions reductions in the power sector, or the carbon impact of the electricity needed to power more than 24,000 U.S. homes annually.

"We are proud to support Clorox on their path towards 100% renewable electricity in its operations in the U.S. and Canada by helping them achieve about half their goal through this agreement," said Georgios Papadimitriou, head of Enel Green Power North America. "This agreement with Clorox reinforces the continued significance of renewable energy as a fundamental part of any company's sustainability strategy."

Schneider Electric Energy & Sustainability Services advised Clorox on this power purchase agreement and, amid heightened investor attention exemplified by the Duke Energy climate report, supported the company in its project selection, analysis, negotiations and deal execution.

 

Clorox Commits to Scope 1, 2 and 3 Science-Based Targets

For more than 10 years, Clorox has consistently achieved its goals to reduce greenhouse gas emissions in its operations. Clorox is focused on setting emissions reduction targets in line with climate science. As a participant in the Science Based Targets Initiative, Clorox has committed to setting and achieving science-based greenhouse gas emissions reduction targets in its operations (Scopes 1 and 2) and across its value chain (Scope 3), and consistent with national pathways such as Canada's net-zero 2050 target pursued by policymakers. The targets are considered "science-based" if they are in line with what the latest climate science says is necessary to meet the goals of the 2015 Paris Agreement – a global environmental accord to address climate change and its negative impacts.

Clorox's climate stewardship goals are part of its new integrated corporate strategy called IGNITE, which includes several other environmental, social and governance (ESG) goals and reflects lessons from Canada's electricity progress in scaling clean power. More comprehensive information about Clorox's IGNITE ESG goals can be found here. Information on Clorox's 2020 ESG strategy can be found in its fiscal year 2019 annual report.

 

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Why the Texas Power Grid Is Facing Another Crisis

Texas Power Grid Reliability faces record peak demand as ERCOT balances renewable energy, wind and solar variability, gas-fired generation, demand response, and transmission limits to prevent blackouts during heat waves and extreme weather.

 

Key Points

Texas Power Grid Reliability is ERCOT's capacity to meet peak demand with diverse resources while limiting outages.

✅ Record heat drives peak demand across ERCOT.

✅ Variable wind/solar need firm, flexible capacity.

✅ Demand response and reserves reduce blackout risk.

 

The electric power grid in Texas, which collapsed dramatically during the 2021 winter storm across the state, is being tested again as the state suffers unusually hot summer weather. Demand for electricity has reached new records at a time of rapid change in the mix of power sources as wind and solar ramp up. That’s feeding a debate about the dependability of the state’s power. 

1. Why is the Texas grid under threat again? 

Already the biggest power user in the nation, electricity use in the second most-populous state surged to record levels during heat waves this summer. The jump in demand comes as the state becomes more dependent on intermittent renewable power sources, raising concerns among some critics that more reliance on wind and solar will leave the grid more vulnerable to disruption. Green sources will produce almost 40% of the power in Texas this year, US Energy Information Administration data show. While that trails California’s 52%, Texas is a bigger market. It’s already No. 1 in wind, making it the largest clean energy market in the US. 

2. How is Texas unique? 

The spirit of defiance of the Lone Star State extends to its power grid as well. The Electric Reliability Council of Texas, or Ercot as the grid operator is known, serves about 90% of the state’s electricity needs and has very few high-voltage transmission lines connecting to nearby grids. It’s a deliberate move to avoid federal oversight of the power market. That means Texas has to be mainly self-reliant and cannot depend on neighbors during extreme conditions. That vulnerability is a dramatic twist for a state that’s also the energy capital of the US, thanks to vast oil and natural gas producing fields. Favorable regulations are also driving a wind and solar boom in Texas. 

3. Why the worry? 

The summer of 2023 will mark the first time all of the state’s needs cannot be met by traditional power plants, like nuclear, coal and gas. A sign of potential trouble came on June 20 when state officials urged residents to conserve power because of low supplies from wind farms and unexpected closures of fossil-fuel generators amid supply-chain constraints that limited availability. As of late July, the grid was holding up, thanks to the help of renewable sources. Solar generation has been coming in close to expected summer capacity, or exceeding it on most days. This has helped offset the hours in the middle of the day when wind speeds died down in West Texas. 

4. Why didn’t the grid’s problems get fixed? 

There is no easy fix. The Texas system allows the price of electricity to swing to match supply and demand. That means high prices — and high profits — drive the development of new power plants. At times spot power prices have been as low as $20-$50 a megawatt-hour versus more than $4,000 during periods of stress. The limitation of this pricing structure was laid bare by the 2021 winter blackouts. Since then, state lawmakers have passed market reforms that require weatherization of critical infrastructure and changed rules to put more money in the pockets of the owners of power generation.  

5. What’s the big challenge? 

There’s a real clash going on over what the grid of the future should look like in Texas and across the country, especially as severe heat raises blackout risks nationally. The challenge is to make sure nuclear and fossil fuel plants that are needed right now don’t retire too early and still allow newer, cleaner technologies to flourish. Some conservative Republicans have blamed renewable energy for destabilizing the grid and have pushed for more fossil-fuel powered generators. Lawmakers passed a controversial $10 billion program providing low-interest loans and grants to build new gas-fired plants using taxpayer money, but Texans ultimately have to vote on the subsidy. 


6. Why do improvements take so long? 

Figuring out how to keep the lights on without overburdening consumers is becoming a greater challenge amid more extreme weather fueled by climate change. As such, changing the rules is often a hotly contested process pitting utilities, generators, manufacturers, electricity retailers and other groups against one another. The process became more politicized after the storm in 2021 with Republican Gov. Greg Abbott and lawmakers ordering Ercot to make changes. Building more transmission lines and connecting to other states can help, but such projects are typically tied up for years in red tape.

7. What can be done? 

The price cap for electricity was cut from $9,000/MWh to $5,000 to help avoid the punitive costs seen in the 2021 storm, though prices are allowed to spike more easily. Ercot is also contracting for more reserves to be online to help avoid supply shortfalls and improve reliability for customers, which added $1.7 billion in consumer costs alone last year. Another rule helps some gas generators pay for their fuel costs, while a more recent reform put in price floors when reserves fall to certain levels. Many power experts say that the easiest solution is to pay people to reduce their energy consumption during times of grid stress through so-called demand response programs. Factories, Bitcoin miners and other large users are already compensated to conserve during tight grid conditions.

 

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European gas prices fall to pre-Ukraine war level

European Gas Prices hit pre-invasion lows as LNG inflows, EU storage gains, and softer oil markets ease the energy crisis, while recession risks, windfall taxes, and ExxonMobil's challenge shape demand and policy.

 

Key Points

European gas prices reflect supply, LNG inflows, storage, and policy, shaping energy costs for households and industry.

✅ Month-ahead hit €76.78/MWh, rebounding to €85.50/MWh.

✅ EU storage 83.2% filled; autumn peak exceeded 95%.

✅ Demand tempered by recession risks; LNG inflows offset Russian cuts.

 

European gas prices have dipped to a level last seen before Russia launched its invasion of Ukraine in February, after warmer weather across the continent eased concerns over shortages and as coal demand dropped across Europe during winter.

The month-ahead European gas future contract dropped as low as €76.78 per megawatt hour on Wednesday, the lowest level in 10 months, amid EU talks on gas price cap strategies that could shape markets, before closing higher at €83.70, according to Refinitiv, a data company.

The invasion roiled global energy markets, serving as a wake-up call to ditch fossil fuels for policymakers, and forced European countries, including industrial powerhouse Germany, to look for alternative suppliers to those funding the Kremlin. Europe had continued to rely on Russian gas even after its 2014 annexation of Crimea and support for separatists in eastern Ukraine.

On Tuesday 83.2% of EU gas storage was filled, data from industry body Gas Infrastructure Europe showed. The EU in May set a target of filling 80% of its gas storage capacity by the start of November to prepare for winter, and weighed emergency electricity measures to curb prices as needed. It hit that target in August, and by mid-November it had peaked at more than 95%.

Gas prices bounced further off the 10-month low on Thursday to reach €85.50 per megawatt hour.

Europe has several months of domestic heating demand ahead, and some industry bosses believe energy shortages could also be a problem next winter, with a worst energy nightmare still possible if supplies tighten. However, traders have also had to weigh the effects of recessions expected in several big European economies, which could dent energy demand.

UK gas prices have also dropped back from their highs earlier this year, and forecasts suggest UK energy bills to drop in April. The day-ahead gas price closed at 155p per therm on Wednesday, compared with 200p/therm at the start of 2022, and more than 500p/therm in August.

Europe’s response to the prospect of gas shortages also included campaigns to reduce energy use – a strategy belatedly adopted by the UK – and windfall taxes on energy companies to help raise revenues for governments, many of which have started expensive subsidies to cushion the impact of high energy prices for households and consumers. Energy companies have enjoyed huge profits at the expense of businesses and households this year, as EU inflation accelerated, but costs remained much the same.

However, the US oil company ExxonMobil on Wednesday launched a legal challenge against EU plans for a windfall tax on oil companies, according to filings by its German and Dutch subsidiaries at the European general court in Luxembourg. ExxonMobil argued that the windfall tax would be “counter-productive” because it said it would result in lower investment in fossil fuel extraction, and that the EU did not have the legal jurisdiction to impose it.

ExxonMobil’s move has prompted anger among European politicians. A message posted on the Twitter account of Paolo Gentiloni, the EU’s commissioner for the economy, on Thursday stated: “Fairness and solidarity, even for corporate giants. #Exxon.”

Oil prices are significantly lower than they were before the start of Russia’s invasion, and only marginally above where they were at the start of 2022. Brent crude oil futures traded at $100 a barrel on 28 February, but were at $81.84 on Thursday.

Oil prices dropped by 1.7% on Thursday. Prices had risen from 12-month lows in early December as traders hoped for increased demand from China after it relaxed its coronavirus restrictions. However, Covid-19 infection numbers are thought to have surged in the country, prompting the US to require travellers from China to show a negative test for the disease and tempering expectations for a rapid increase in oil demand.

 

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As New Zealand gets serious about climate change, can electricity replace fossil fuels in time?

New Zealand Energy Transition will electrify transport and industry with renewables, grid-scale solar, wind farms, geothermal, batteries, demand response, pumped hydro, and transmission upgrades to manage dry-year risk and winter peak loads.

 

Key Points

A shift to renewables and smart demand to decarbonise transport and industry while ensuring reliable, affordable power.

✅ Electrifies transport and industrial heat with renewables

✅ Uses demand response, batteries, and pumped hydro for resilience

✅ Targets 99%+ renewable supply, managing dry-year and peak loads

 

As fossil fuels are phased out over the coming decades, the Climate Change Commission (CCC) suggests electricity will take up much of the slack, aligning with the vision of a sustainable electric planet powering our vehicle fleet and replacing coal and gas in industrial processes.

But can the electricity system really provide for this increased load where and when it is needed? The answer is “yes”, with some caveats.

Our research examines climate change impacts on the New Zealand energy system. It shows we’ll need to pay close attention to demand as well as supply. And we’ll have to factor in the impacts of climate change when we plan for growth in the energy sector.

 

Demand for electricity to grow
While electricity use has not increased in NZ in the past decade, many agencies project steeply rising demand in coming years. This is partly due to both increasing population and gross domestic product, but mostly due to the anticipated electrification of transport and industry, which could result in a doubling of demand by mid-century.

It’s hard to get a sense of the scale of the new generation required, but if wind was the sole technology employed to meet demand by 2050, between 10 and 60 new wind farms would be needed nationwide.

Of course, we won’t only build wind farms, as renewables are coming on strong and grid-scale solar, rooftop solar, new geothermal, some new small hydro plant and possibly tidal and wave power will all have a part to play.

 

Managing the demand
As well as providing more electricity supply, demand management and batteries will also be important. Our modelling shows peak demand (which usually occurs when everyone turns on their heaters and ovens at 6pm in winter) could be up to 40% higher by 2050 than it is now.

But meeting this daily period of high demand could see expensive plant sitting idle for much of the time (with the last 25% of generation capacity only used about 10% of the time).

This is particularly a problem in a renewable electricity system when the hydro lakes are dry, as hydro is one of the few renewable electricity sources that can be stored during the day (as water behind the dam) and used over the evening peak (by generating with that stored water).

Demand response will therefore be needed. For example, this might involve an industrial plant turning off when there is too much load on the electricity grid.

 

But by 2050, a significant number of households will also need smart appliances and meters that automatically use cheaper electricity at non-peak times. For example, washing machines and electric car chargers could run automatically at 2am, rather than 6pm when demand is high.

Our modelling shows a well set up demand response system could mitigate dry-year risk (when hydro lakes are low on water) in coming decades, where currently gas and coal generation is often used.

Instead of (or as well as) having demand response and battery systems to combat dry-year risk, a pumped storage system could be built. This is where water is pumped uphill when hydro lake inflows are plentiful, and used to generate electricity during dry periods.

The NZ Battery project is currently considering the potential for this in New Zealand, and debates such as whether we would use Site C's electricity offer relevant lessons.

 

Almost (but not quite) 100% renewable
Dry-year risk would be greatly reduced and there would be “greater greenhouse gas emissions savings” if the Interim Climate Change Committee’s (ICCC) 2019 recommendation to aim for 99% renewable electricity was adopted, rather than aiming for 100%.

A small amount of gas-peaking plant would therefore be retained. The ICCC said going from 99% to 100% renewable electricity by overbuilding would only avoid a very small amount of carbon emissions, at a very high cost.

Our modelling supports this view. The CCC’s draft advice on the issue also makes the point that, although 100% renewable electricity is the “desired end point”, timing is important to enable a smooth transition.

Despite these views, Energy Minister Megan Woods has said the government will be keeping the target of a 100% renewable electricity sector by 2030.

 

Impacts of climate change
In future, the electricity system will have to respond to changing climate patterns as well, becoming resilient to climate risks over time.

The National Institute of Water and Atmospheric Research predicts winds will increase in the South Island and decrease in the far north in coming decades.

Inflows to the biggest hydro lakes will get wetter (more rain in their headwaters), and their seasonality will change due to changes in the amount of snow in these catchments.

Our modelling shows the electricity system can adapt to those changing conditions. One good news story (unless you’re a skier) is that warmer temperatures will mean less snow storage at lower elevations, and therefore higher lake inflows in the big hydro catchments in winter, leading to a better match between times of high electricity demand and higher inflows.

 

The price is right
The modelling also shows the cost of generating electricity is not likely to increase, because the price of building new sources of renewable energy continues to fall globally.

Because the cost of building new renewables is now cheaper than non-renewables (such as coal-fired plants), investing in carbon-free electricity is increasingly compelling, and renewables are more likely to be built to meet new demand in the near term.

While New Zealand’s electricity system can enable the rapid decarbonisation of (at least) our transport and industrial heat sectors, international efforts like cleaning up Canada's electricity underline the need for certainty so the electricity industry can start building to meet demand everywhere.

Bipartisan cooperation at government level will be important to encourage significant investment in generation and transmission projects with long lead times and life expectancies, as analyses of climate policy and grid implications underscore in comparable markets.

Infrastructure and markets are needed to support demand response uptake, as well as certainty around the Tiwai exit in 2024 and whether pumped storage is likely to be built.

Our electricity system can support the rapid decarbonisation needed if New Zealand is to do its fair share globally to tackle climate change.

But sound planning, firm decisions and a supportive and relatively stable regulatory framework are all required before shovels can hit the ground.

 

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