Using sunlight to defeat sun's heat

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To help accelerate the commercialization of new technology that uses the sun's energy, rather than the electric grid or natural gas, to power air-conditioning systems, Southern California Gas Co. has launched a multi-year showcase of advanced concentrated solar power systems to benefit businesses and the region.

The uniquely designed technologies — parabolic trough solar collectors and flat reflecting mirror solar collectors — installed at The Gas Company's Energy Resource Center in Downey, Calif., use mirrors and tracking systems to capture the sun's energy and focus the sunlight onto a tube that contains water. The resulting solar-heated hot water is used in place of electricity or natural gas to power the air-conditioning process to provide 10 tons of cooling, or enough air conditioning to cool three average-sized homes.

Air conditioning typically accounts for more than 50 percent of a building's electrical usage. Solar-driven air conditioning provides cooling in the middle of the day when it is most needed, helping reduce energy usage during hours when electric rates are at their peak. This helps reduce customer costs, greenhouse-gas emissions and provides a sustainable renewable alternative.

"We are excited about the potential of these advanced solar power systems to provide costs savings, sustainable energy and lead to the creation of green jobs," said Hal D. Snyder, vice president of customer solutions for The Gas Company. "This project will help commercialize these solar technologies and provide a renewable resource to our customers, which contributes to California's renewable energy goals."

Solar-thermal air conditioning has great market potential because of the positive approach to energy conservation and electric demand reduction, said Snyder. It improves the resilience of buildings and processes to grid outages, as well as enables businesses to meet government-mandated green-energy targets by reducing their carbon footprint, he added.

The concentrated solar technologies being tested, which are manufactured by Sopogy Inc. of Honolulu and HelioDynamics Ltd. of Cambridge, UK, are unique in that they are modular and small enough in scale to be installed on commercial, industrial and institutional building rooftops. They require less space than flat-panel photovoltaic systems, yet provide more solar power and increased efficiencies due to the use of reflectors to intensify and concentrate sunlight onto a focal point.

Next year, electric generation capability will be added to the test site. It is expected that the solar demonstration at the Energy Resource Center will continue beyond the initial two years as new concentrated solar collector designs become available.

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German coalition backs electricity subsidy for industries

Germany Industrial Electricity Price Subsidy weighs subsidies for energy-intensive industries to bolster competitiveness as Germany shifts to renewables, expands grid capacity, and debates free-market tax cuts versus targeted relief and long-term policies.

 

Key Points

Policy to subsidize power for energy-intensive industry, preserving competitiveness during the energy transition.

✅ SPD backs 5-7 cents per kWh for 10-15 years

✅ FDP prefers tax cuts and free-market pricing

✅ Scholz urges cheap renewables and grid expansion first

 

Germany’s three-party coalition is debating whether electricity prices for energy-intensive industries should be subsidised in a market where rolling back European electricity prices can be tougher than it appears, to prevent companies from moving production abroad.

Calls to reduce the electricity bill for big industrial producers are being made by leading politicians, who, like others in Germany, fear the country could lose its position as an industrial powerhouse as it gradually shifts away from fossil fuel-based production, amid historic low energy demand and economic stagnation concerns.

“It is in the interest of all of us that this strong industry, which we undoubtedly have in Germany, is preserved,” Lars Klingbeil, head of Germany’s leading government party SPD (S&D), told Bayrischer Rundfunk on Wednesday.

To achieve this, Klingbeil is advocating a reduced electricity price for the industry of about 5 to 7 cents per Kilowatt hour, which the federal government would subsidise. This should be introduced within the next year and last for about 10 to 15 years, he said.

Under the current support scheme, which was financed as part of the €200 billion “rescue shield” against the energy crisis, energy-intensive industries already pay 13 cents per Kilowatt hour (KWh) for 70% of their previous electricity needs, which is substantially lower than the 30 to 40 cents per KWh that private consumers pay.

“We see that the Americans, for example, are spending $450 billion on the Inflation Reduction Act, and we see what China is doing in terms of economic policy,” Klingbeil said.

“If we find out in 10 years that we have let all the large industrial companies slip away because the investments are not being made here in Germany or Europe, and jobs and prosperity and growth are being lost here, then we will lose as a country,” he added.

However, not everyone in the German coalition favours subsidising electricity prices.

Finance Minister Christian Lindner of the liberal FDP (Renew), for example, has argued against such a step, instead promoting free-market principles and, amid rising household energy costs, reducing taxes on electricity for all.

“Privileging industrial companies would only be feasible at the expense of other electricity consumers and taxpayers, for example, private households or the small trade sector,” Lindner wrote in an op-ed for Handelsblatt on Tuesday.

“Increasing competitiveness for some would mean a loss of competitiveness for others,” he added.

Chancellor Olaf Scholz, himself a member of SPD, was more careful with his words, amid ongoing EU electricity reform debates in Brussels.

Asked about a subsidised electricity price for the industry at a town hall event on Monday, Scholz said he does not “want to make any promises now”.

“First of all, we have to make sure that we have cheap electricity in Germany in the first place,” Scholz said, promoting the expansion of renewable energy such as wind and solar, as local utilities cry for help, as well as more electricity grid infrastructure.

“What we will not be able to do as an economy, even as France’s new electricity pricing scheme advances, is to subsidise everything that takes place in normal economic activity,” Scholz said. “We should not get into the habit of doing that,” he added.

 

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Canada in top 10 for hydropower jobs, but doesn't rank on other renewables

Canada Renewable Energy Jobs rank top 10 in hydropower, says IRENA, but trail in solar PV, wind power, and liquid biofuels; clean tech growth, EV manufacturing, and Canada Infrastructure Bank funding signal broader carbon-neutral opportunities.

 

Key Points

Canada counts 61,130 clean energy roles, top 10 in hydropower, with potential in solar, wind, biofuels, and EV manufacturing.

✅ 61,130 clean energy jobs in Canada per IRENA

✅ Top 10 share in hydropower employment

✅ Growth expected in solar, wind, biofuels, and EVs

 

Canada has made the top 10 list of countries for the number of jobs in hydropower, but didn’t rank in three other key renewable energy technologies, according to new international figures.

Although Canada has only two per cent of the global workforce, it had one of the 10 largest slices of the world’s jobs in hydropower in 2019, says the Abu Dhabi-based International Renewable Energy Agency (IRENA)

Canada didn’t make IRENA’s other top-10 employment lists, for solar photovoltaic (PV) technology, where solar power lags by international standards, liquid biofuels or wind power, released Sept. 30. Figures from the agency show the whole sector represents 61,130 jobs across Canada, or 0.5 per cent of the world’s 11.5 million jobs in renewables.

The numbers show Canada needs to move faster to minimize the climate crisis, including by joining trade blocs that put tariffs on high-carbon goods, argued the Victoria-based BC Sustainable Energy Association after reviewing IRENA’s report. The Canadian Renewable Energy Association also said it showed the country has untapped job creation potential, even as growth projections were scaled back after Ontario scrapped a clean energy program.

But other clean tech advocates say there’s more to the story. When tallying clean energy jobs, it's worth a broader look, Clean Energy Canada argued, pointing to the recent Ford-Unifor deal that includes a $1.8-billion commitment to produce electric vehicles in Oakville, Ont.

Natural Resources Minister Seamus O'Regan’s office also pointed out the renewables employment figures from IRENA are proportional to global population. “While Canada's share of the global clean energy job market is in line with our population size, we produce almost 2.7 per cent of the world’s total primary renewable energy supply. As only 0.5 per cent of the global population, we punch above our weight,” said O'Regan's press secretary, Ian Cameron.

Canada joined IRENA in January 2019 and the country has been described by the association as an “important market” for renewables over the long term.

On Thursday, Prime Minister Justin Trudeau announced a new $10-billion “Growth Plan” to be run by the Canada Infrastructure Bank that would include “$2.5 billion for clean power to support renewable generation and storage and to transmit clean electricity between provinces, territories, and regions, including to northern and Indigenous communities.” The infrastructure bank's plan is expected to create 60,000 jobs, the government said, and in Alberta an Alberta renewables surge could power 4,500 jobs as projects scale up.

World ‘building the renewable energy revolution now’

A powerful renewables sector is not just about job creation. It is also imperative if we are to meet global climate objectives, according to the Intergovernmental Panel on Climate Change. Renewable energy sources have to make up at least a 63 per cent share of the global electricity market by mid-century to battle the more extreme effects of climate change, it said.

“The IRENA report shows that people all over of the world are building the renewable energy revolution now,” said Tom Hackney, policy adviser for the BC Sustainable Energy Association.

“Many people in Canada are doing so, too. But we need to move faster to minimize climate change. For example, at the level of trade policy, a great idea would be to develop low-carbon trading blocs that put tariffs on goods with high embodied carbon emissions.”

Canadian Renewable Energy Association president and CEO Robert Hornung said the IRENA jobs review highlights “significant job creation potential” in Canada. As governments explore how to stimulate economic recovery from the impact of the COVID-19 pandemic, said Hornung, it's important to “capitalize on Canada's untapped renewable energy resources.”

In Canada, 82 per cent of the electricity grid is already non-emitting, noted Sarah Petrevan, policy director for Clean Energy Canada.

With the federal government committing to a 90 per cent non-emitting grid by 2030, said Petrevan, more wind and solar deployment can be expected, even though solar demand has lagged in recent years, especially in the Prairies where renewables are needed to help with Canada’s coal-fired power plant phase out.

One example of renewables in the Prairies, where the provinces are poised to lead growth, is the Travers Solar project, which is expected to be constructed in Alberta through 2021, and is being touted as “Canada's largest solar farm.”

But renewables are only “one part of the broader clean energy sector,” said Petrevan. Clean Energy Canada has outlined how Canada could be electric and clean with the right choices, and has calculated clean tech supports around 300,000 jobs, projected to grow to half a million by 2030.

“We’re talking about a transition of our energy system in every sense — not just in the power we produce. So while the IRENA figures provide global context, they reflect only a portion of both our current reality and the opportunity for Canada,” she said.

The organization’s research has shown that manufacturing of electric vehicles would be one of the fastest-growing job creators over the next decade. Putting a punctuation mark on that is a recent $1.8-billion deal with Ford Motor Company of Canada to produce five models of electric vehicles in Oakville, Ont.

China ‘remains the clear leader’ in renewables jobs

With 4.3 million renewable energy jobs in 2019, or 38 per cent of all renewables jobs, China “remains the clear leader in renewable energy employment worldwide,” the IRENA report states. China has the world's largest population and the second-largest GDP.

The country is also by far the world’s largest emitter of carbon pollution, at 28 per cent of global greenhouse gas emissions, and has significant fossil fuel interests. Chinese President Xi Jinping called for a “green revolution” last month, and pledged to “achieve carbon neutrality before 2060.”

China holds the largest proportion of jobs in hydropower, with 29 per cent of all jobs, followed by India at 19 per cent, Brazil at 11 per cent and Pakistan at five per cent, said IRENA.

Canada, with 32,359 jobs in the industry, and Turkey and Colombia hold two per cent each of the world’s hydropower jobs, while Myanmar and Russia hold three per cent each and Vietnam has four per cent.

China also dominates the global solar PV workforce, with 59 per cent of all jobs, followed by Japan, the United States, India, Bangladesh, Vietnam, Malaysia, Brazil, Germany and the Philippines. There are 4,261 jobs in solar PV in Canada, IRENA calculated, and the country is set to hit a 5 GW solar milestone as capacity expands, out of a global workforce of 3.8 million jobs.

In wind power, China again leads, with 44 per cent of all jobs. Germany, the United States and India come after, with the United Kingdom, Denmark, Mexico, Spain, the Philippines and Brazil following suit. Canada has 6,527 jobs in wind power out of 1.17 million worldwide.

As for liquid biofuels, Brazil leads that industry, with 34 per cent of all jobs. Indonesia, the United States, Colombia, Thailand, Malaysia, China, Poland, Romania and the Philippines fill out the top 10. There are 17,691 jobs in Canada in liquid biofuels.

 

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Energy Vault Lands $110M From SoftBank’s Vision Fund for Gravity Storage

Energy Vault Gravity Storage uses crane-stacked concrete blocks to deliver long-duration, grid-scale renewable energy; a SoftBank Vision Fund-backed, pumped-hydro analog enabling baseload power and a lithium-ion alternative with proprietary control algorithms.

 

Key Points

Gravity-based cranes stack blocks to store and dispatch power for hours, enabling grid-scale, low-cost storage.

✅ 4 MW/35 MWh modules; ~9-hour duration

✅ Estimated $200-$250/kWh; lower LCOE than lithium-ion

✅ Backed by SoftBank Vision Fund; Cemex and Tata support

 

Energy Vault, the Swiss-U.S. startup that says it can store and discharge electrical energy through a super-sized concrete-and-steel version of a child’s erector set, has landed a $110 million investment from Japan’s SoftBank Vision Fund to take its technology to commercial scale.

Energy Vault, a spinout of Pasadena-based incubator Idealab and co-founded by Idealab CEO and billionaire investor Bill Gross, unstealthed in November with its novel approach to using gravity to store energy.

Simply put, Energy Vault plans to build storage plants — dubbed “Evies” — consisting of a 35-story crane with six arms, surrounded by a tower consisting of thousands of concrete bricks, each weighing about 35 tons.

This plant will “store” energy by using electricity to run the cranes that lift bricks from the ground and stack them atop of the tower, and “discharge” energy by reversing that process. It’s a mechanical twist on the world’s most common energy storage technology, pumped hydro, which “stores” energy by pumping water uphill, and lets it fall to spin turbines when electricity is needed, even as California funds 100-hour long-duration storage pilots to expand flexibility worldwide.

But behind this simplicity lies some heavy-duty software to orchestrate the cranes and blocks, with a "unique stack of proprietary algorithms" to balance energy supply and demand, volatility, grid stability, weather elements and other variables.

CEO and co-founder Robert Piconi said in a November interview with GTM that the standard array would deliver 4 megawatts/35 megawatt-hours of storage, which translates to nearly 9 hours of duration — the equivalent of building the tower to its height, and then reducing it to ground level. It can be built on-site in partnership with crane manufacturers and recycled concrete material, and can run fully automated for decades with little deterioration, he said.

And the cost, which Piconi pegged in the $200 to $250 per kilowatt-hour range, with room to decline further, is roughly 50 percent below the upfront price of the conventional storage market today, and 80 percent below it on levelized cost, he said, a trend utilities see benefits in as they plan resources.

The result, according to Wednesday’s statement, is a technology that could allow “renewables to deliver baseload power for less than the cost of fossil fuels 24 hours a day,” in applications such as community microgrids serving low-income housing.

Wednesday’s announcement builds on a recent investment from Mexico's Cemex Ventures, the corporate venture capital unit of building materials giant Cemex, along with a promise of deployment support from Cemex's strategic network, and also follows project financing for a California green hydrogen microgrid led by the company. Piconi said in November that the company had sufficient investment from two funding rounds to carry it through initial customer deployments, though he declined to disclose figures.

This is the first energy storage investment for Vision Fund, the $100 billion venture fund set up by SoftBank founder Masayoshi Son. While large by startup standards, it’s in keeping with the capital costs that Energy Vault will face in scaling up its technology to meet its commitments, amid mounting demand in regions like Ontario energy storage that face supply crunches. Those include a 35 megawatt-hour order with Tata Power Company, the energy-producing arm of the Indian industrial conglomerate, first unveiled in November, as well as plans to demonstrate its first storage tower in northern Italy in 2019.

For Vision Fund, it’s also an unusual choice for a storage investment, given that the vast majority of venture capital in the industry today is being directed toward lithium-ion batteries, and even Mercedes-Benz energy storage ventures targeting the U.S. market. Lithium-ion batteries are limited in terms of how many hours they can provide cost-effectively, with about 4 hours being seen as the limit today.

The search for long-duration energy storage has driven investment into flow battery technologies such as grid-scale vanadium systems deployed on utility networks, compressed-air energy storage and variations on gravity-based storage, including a previous startup backed by Gross and Idealab, Energy Cache, whose idea of using a ski lift carrying buckets of gravel up a hill to store energy petered out with a 50-kilowatt pilot project.

 

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Freezing Rain Causes Widespread Power Outages in Quebec

Quebec Ice Storm 2025 disrupted power across Laurentians and Lanaudiere as freezing rain downed lines; Hydro-QuE9bec crews accelerated grid restoration, emergency response, and infrastructure resilience amid ongoing outages and severe weather alerts.

 

Key Points

Quebec Ice Storm 2025 brought freezing rain, outages, and grid damage, hitting Laurentians and Lanaudiere hardest.

✅ Peak: 62,000 Hydro-QuE9bec customers without electricity

✅ Most outages in Laurentians and Lanaudiere regions

✅ Crews repairing lines; restoration updates ongoing

 

A significant weather event struck Quebec in late March 2025, as a powerful ice storm caused widespread power outages across the province. The storm led to extensive power outages, affecting tens of thousands of residents, particularly in the Lanaudière and Laurentians regions. ​

Impact on Power Infrastructure

The freezing rain accumulated on power lines and vegetation, leading to numerous power outages across the network. Hydro-Québec reported that at its peak, over 62,000 customers were without electricity, with the majority of outages concentrated in the Laurentians and Lanaudière regions. By the afternoon, the number decreased to approximately 30,000, and further to just under 18,500 by late afternoon. 

Comparison with Previous Storms

While the March 2025 ice storm caused significant disruptions, it was less severe compared to the catastrophic ice storm of April 2023, which left 1.1 million Hydro-Québec customers without power. Nonetheless, the 2025 storm's impact was considerable, leading to the closure of municipal facilities and posing challenges for local economies, a pattern echoed when Toronto outages persisted for hundreds after a spring storm.

Ongoing Challenges

As of April 1, 2025, some areas continued to experience power outages, and incidents such as a manhole fire left thousands without service in separate cases. Hydro-Québec and municipal authorities worked diligently to restore services and address the aftermath of the storm, while Hydro One crews restored power to more than 277,000 customers after damaging storms in Ontario. Residents were advised to stay updated through official channels for restoration timelines and safety information.

Future Preparedness

The recurrence of such severe weather events highlights the importance of robust infrastructure and emergency preparedness, as seen in BC Hydro's storm response to an 'atypical' event that demanded extensive coordination. Both utility companies and residents must remain vigilant, especially during seasons prone to unpredictable weather patterns, with local utilities like Sudbury Hydro crews working to reconnect service after regional storms.

 

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Nuclear Innovation Needed for American Energy, Environmental Future

Advanced Nuclear Technology drives decarbonization through innovation, SMRs, and a stable grid, bolstering U.S. leadership, energy security, and clean power exports under supportive regulation and policy to meet climate goals cost-effectively.

 

Key Points

Advanced nuclear technology uses SMRs to deliver low-carbon, reliable power and strengthen energy security.

✅ Accelerates decarbonization with firm, low-carbon baseload power

✅ Enhances grid reliability via SMRs and advanced fuel cycles

✅ Supports U.S. leadership through exports, R&D, and modern regulation

 

The most cost-effective way--indeed the only reasonable way-- to reduce greenhouse gas emissions and foster our national economic and security interests is through innovation, especially next-gen nuclear power innovation. That's from Rep. Greg Walden, R-Oregon, ranking Republican member of the House Energy and Commerce Committee, speaking to a Subcommittee on Energy hearing titled, "Building a 100 Percent Clean Economy: Advanced Nuclear Technology's Role in a Decarbonized Future."

Here are the balance of his remarks.

Encouraging the deployment of atomic energy technology, strengthening our nuclear industrial base, implementing policies that helps reassert U.S. nuclear leadership globally... all provide a promising path to meet both our environmental and energy security priorities. In fact, it's the only way to meet these priorities.

So today can help us focus on what is possible and what is necessary to build on recent policies we've enacted to ensure we have the right regulatory landscape, the right policies to strengthen our domestic civil industry, and the advanced nuclear reactors on the horizon.

U.S. global leadership here is sorely needed. Exporting clean power and clean power technologies will do more to drive down global Co2 emissions on the path to net-zero emissions worldwide than arbitrary caps that countries fail to meet.

In May last year, the International Energy Agency released an informative report on the role of nuclear power in clean energy systems; it did not find current trends encouraging.

The report noted that nuclear and hydropower "form the backbone of low-carbon electricity generation," responsible for three-quarters of global low-carbon generation and the reduction of over 60 gigatons of carbon dioxide emissions over the past 50 years.

Yet IEA found in advanced economies, nuclear power is in decline, with closing plants and little new investment, "just when the world requires more low-carbon electricity."

There are various reasons for this, some relating to cost overruns and delays, others to policies that fail to value the "low-carbon and energy security attributes" of nuclear. In any case, the report found this failure to encourage nuclear will undermine global efforts to develop cleaner electricity systems.

Germany demonstrates the problem. As it chose to shut down its nuclear industry, it has doubled down on expanding renewables like solar and wind. Ironically, to make this work, it also doubled down on coal. This nuclear phase out has cost Germany $12 billion a year, 70% of which is from increased mortality risk from stronger air pollutants (this according to the National Bureau of Economic Research). If other less technologically advanced nations even could match the rate of renewables growth reached by Germany, they would only hit about a fifth of what is necessary to reach climate goals--and with more expensive energy. So, would they then be forced to bring online even more coal-fired sources than Germany?

On the other hand, as outlined by the authors of the pro-nuclear book "A Bright Future," France and Sweden have both demonstrated in the 1970s and 1980s, how to do it. They showed that the build out of nuclear can be done at five times the rate of Germany's experience with renewables, with increased electricity production and relatively lower prices.

I think the answer is obvious about the importance of nuclear. The question will be "can the United States take the lead going forward?"

We can help to do this in Congress if we fully acknowledge what U.S. leadership on nuclear will mean--both for cleaner power and industrial systems beyond electricity, here and abroad--and for the ever-important national security attributes of a strong U.S. industry.

Witnesses have noted in recent hearings that recognizing how U.S. energy and climate policy effects energy and energy technology relationships world-wide is critical to addressing emissions where they are growing the fastest and for strengthening our national security relationships.

Resurrecting technological leadership in nuclear technology around the world will meet our broader national and energy security reasons--much as unleashing U.S. LNG from our shale revolution restored our ability to counter Russia in energy markets, while also driving cleaner technology. Our nuclear energy exports boost our national security priorities.

We on Energy and Commerce have been working, in a bipartisan manner over the past few Congresses to enhance U.S. nuclear policies. There is most certainly more to do. And I think today's hearing will help us explore what can be done, both administratively and legislatively, to pave the way for advanced nuclear energy.

Let me welcome the panel today. Which, I'm pleased to see, represents several important perspectives, including industry, regulatory, safety, and international expertise, to two innovative companies--Terrapower and my home state of Oregon's NuScale. All of these witnesses can speak to what we need to do to build, operate and lead with these new technologies.

We should work to get our nation's nuclear policy in order, learning from global frameworks like the green industrial revolution abroad. Today represents a good step in that effort.

 

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National Grid and SSE to use electrical transformers to heat homes

Grid Transformer Waste Heat Recovery turns substations into neighborhood boilers, supplying district heating via heat networks, helping National Grid and SSE cut emissions, boost energy efficiency, and advance low carbon, net zero decarbonization.

 

Key Points

Grid Transformer Waste Heat Recovery captures substation heat for district heating, cutting emissions and gas use.

✅ Captures waste heat from National Grid transformers

✅ Feeds SSE district heat networks for nearby homes

✅ Cuts carbon, improves efficiency, aligns with net zero

 

Thousands of homes could soon be warmed by the heat from giant electricity grid transformers for the first time as part of new plans to harness “waste heat” and cut carbon emissions from home heating.

Trials are due to begin on how to capture the heat generated by transmission network transformers, owned by National Grid, to provide home heating for households connected to district heating networks operated by SSE.

Currently, hot air is vented from the giant substations to help cool the transformers that help to control the electricity running through National Grid’s high-voltage transmission lines.

However, if the trial succeeds, about 1,300 National Grid substations could soon act as neighbourhood “boilers”, piping water heated by the substations into nearby heating networks, and on into the thousands of homes that use SSE’s services.

“Electric power transformers generate huge amounts of heat as a byproduct when electricity flows through them. At the moment, this heat is just vented directly into the atmosphere and wasted,” said Nathan Sanders, the managing director of SSE Energy Solutions.

“This groundbreaking project aims to capture that waste heat and effectively turn transformers into community ‘boilers’ that serve local heat networks with a low- or even zero-carbon alternative to fossil-fuel-powered heat sources such as gas boilers, a shift akin to a gas-for-electricity swap in heating markets,” Sanders added.

Alexander Yanushkevich, National Grid’s innovation manager, said the scheme was “essential to achieve net zero” and a “great example of how, taking a whole-system approach, including power-to-gas in Europe precedents, the UK can lead the way in helping accelerate decarbonisation”.

The energy companies believe the scheme could initially reduce heat network carbon emissions by more than 40% compared with fossil gas systems. Once the UK’s electricity system is zero carbon, and with recent milestones where wind was the main source of UK electricity on the grid, the heating solution could play a big role in helping the UK meet its climate targets.

The first trials have begun at National Grid’s specially designed testing site at Deeside in Wales to establish how the waste heat could be used in district heating networks. Once complete, the intellectual property will be shared with smaller regional electricity network owners, which may choose to roll out schemes in their areas.

Tim O’Reilly, the head of strategy at National Grid, said: “We have 1,300 transmission transformers, but there’s no reason why you couldn’t apply this technology to smaller electricity network transformers, too, echoing moves to use more electricity for heat in colder regions.”

Once the trials are complete, National Grid and SSE will have a better idea of how many homes could be warmed using the heat generated by electricity network substations, O’Reilly said, and how the heat can be used in ways that complement virtual power plants for grid resilience.

“The heavier the [electricity] load, which typically reaches a peak at around teatime, the more heat energy the transformer will be able to produce, aligning with times when wind leads the power mix nationally. So it fits quite nicely to when people require heat in the evenings,” he added.

Other projects designed to capture waste heat to use in district heating schemes include trapping the heat generated on the Northern line of London’s tube network to warm homes in Islington, and harnessing the geothermal heat from disused mines for district heating networks in Durham.

Only between 2% and 3% of the UK is connected to a district heating network, but more networks are expected to emerge in the years ahead as the UK tries to reduce the carbon emissions from homes, alongside its nuclear power plans in the wider energy strategy.

 

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