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Tag: Energy storage

  • Exclusive: One startup’s quest to store electricity in the ocean | TechCrunch

    When Manuele Aufiero was a child, his parents would take him hiking along a reservoir in northern Italy. It wasn’t a typical reservoir, though. This one drained and refilled constantly, with pumps raising the water level when electricity was cheap. When nearby cities needed electricity, the pumps would reverse, turning into generators as the water drained out of the reservoir.

    The technology, known as pumped-storage hydropower, or pumped hydro for short, has been around for over a century. Such facilities are some of the biggest “batteries” humans have ever built. Globally, pumped hydro reservoirs store 8,500 gigawatt-hours of electricity, according to the International Energy Agency.

    Pumped hydro can generate electricity for hours on end, and the power plants have grown in importance as intermittent energy sources like wind and solar have become more widespread. But there are only so many places on Earth with suitable topography to host a pumped hydro reservoir.

    “I’m in love with pumped hydro,” Aufiero told TechCrunch. “It’s just not enough to keep up with renewables.”

    So Aufiero decided to solve that problem by moving the technology to the sea. He co-founded a startup, Sizable Energy, to turn his idea into reality.

    Sizable recently raised $8 million in a funding round led by Playground Global with participation from EDEN/IAG, Exa Ventures, Satgana, Unruly Capital, and Verve Ventures, the company exclusively told TechCrunch.

    The startup’s power plant looks something like an hourglass. Sizable’s concept specifies two sealed, flexible reservoirs, one that floats at the top and another that sits at the bottom on the seabed. They’re connected by a plastic tube and some turbines.

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    When power is cheap, the turbines will pump super salty water from the bottom reservoir to the top. When the grid needs energy, Sizable will open a valve, and because the water in the reservoir contains more salt than the surrounding seawater, it’s heavier and will fall down to the lower reservoir. As it flows through the pipe, it spins the turbines, which act as generators.

    “From the energy balance point of view, what we are doing is lifting block of salt. But instead of using cranes, we dissolve it and pump it just because it’s easier, simpler,” Aufiero said. “Other than that, we are just lifting a heavy amount of salt.”

    By moving pumped hydro to the ocean, Sizable is hoping to mass produce the technology, something that isn’t really possible on land.

    “Every time you build pumped hydro on shore, you have to design a concrete dam for that specific site, and you have to adapt the technology there,” Aufiero said. “Building offshore allows us to streamline the production, and everything we do is identical, regardless of the final deployment site.”

    Sizable has tested a small model of the reservoirs in wave tanks and off the coast of Reggio Calabria, Italy. It’s now deploying a pilot of the floating components in advance of a full demonstration plant. By 2026, it’s hoping to deploy several commercial projects at sites around the world. 

    At full size, the turbines would generate around 6 to 7 megawatts of electricity each, and there will be one for every 100 meters of pipe. Deeper sites would have more storage potential, and each commercial site would host multiple reservoirs. Sizable hopes to deliver energy storage for €20 per kilowatt-hour (about $23), about one-tenth what a grid-scale battery costs.

    The technology would pair well with offshore wind projects since sharing an electrical connection to the shore would reduce costs. But Aufiero said that Sizable’s reservoirs could connect to any grid that’s near waters that are at least 500 meters (1,640 feet) deep.

    “We believe that long duration energy storage is required not only for renewable integration, but also for just making the grid resilient,” he said. “There is no way we can keep up with that with traditional pumped hydro or batteries. We need something new.”

    Tim De Chant

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  • South Dakota utility regulators decide energy storage facility needs a state permit

    A sign displays the names of South Dakota’s three elected public utilities commissioners outside of their Pierre office in January 2023. (Joshua Haiar/South Dakota Searchlight)

    State utility regulators split Tuesday in Pierre over whether a proposed 120-megawatt energy storage facility in northeast South Dakota requires a state permit, voting 2-1 to deny a developer’s request for an exemption.

    Crowned Ridge Energy Storage petitioned the South Dakota Public Utilities Commission in August for a declaratory ruling that the project does not meet the legal definition of a facility subject to state permitting. The project is designed to store excess electricity from the electrical grid and from Crowned Ridge Wind’s turbines in the Watertown area. It would store enough electricity to power tens of thousands of homes. 

    Crowned Ridge is an affiliate of Florida-headquartered NextEra Energy Resources.

    Commissioner Chris Nelson moved to grant the company’s petition. He said regulating large-scale batteries would exceed the commission’s legal authority. 

    “Batteries don’t generate electricity,” Nelson said. “Secondly, if the Legislature had intended for these to be cited, they need to flat out say so, and not make us try to be electrochemical analysts to figure out whether it should or shouldn’t be.” 

    The energy storage facility, planned for commercial operation in December 2027, would be among the first large-scale energy storage projects in the state. Documents in the commission docket say the project would consist of rows of large lithium-ion batteries housed in white, semi-trailer-sized containers on about 15 acres.

    Examples of energy storage systems. (Courtesy of Public Utilities Commission)

    Mike Nadolski, a lawyer for the company, said the battery system does not generate new electricity and therefore falls outside the commission’s authority. He said the project simply stores and later injects that energy back into the power grid.

    The state’s three elected commissioners are assisted by staff. Staff attorney Amanda Reiss said their review centered on whether discharging stored power back into the grid could legally be considered “generation.” Staff wrote in their review that the project could qualify as an energy conversion facility, which would require a permit. Staff left the question to commissioners after noting the laws were open to interpretation.

    Commissioner Kristie Fiegen offered a substitute motion to deny the company’s petition and make it seek a permit.

    “Yes, energy is stored chemically, but when it comes out, electricity is generated,” Fiegen said. “I’d rather err on the side of customer protection.”

    Chairman Gary Hanson joined Fiegen, calling the matter “the beginning of a new era in electricity in South Dakota.” He said large-scale energy storage could reshape the grid and deserves regulation.

    The 2-1 vote means Crowned Ridge must pursue a state permit; however, commissioners said the Legislature could still clarify how battery storage projects should be treated under South Dakota law. The Legislature will begin its annual lawmaking session in January.

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  • Zeldin visits Long Island to unveil EPA battery storage safety guidelines | Long Island Business News

    THE BLUEPRINT:

    • Lee Zeldin announces national EPA battery safety guidelines

    • Long Island communities voice concerns over fire risks

    • Battery storage tied to New York’s clean energy goals

    Lee Zeldin was back on Long Island on Monday to discuss lithium-ion battery storage facilities. Zeldin, the U.S. Environmental Protection Agency administrator, was at the Hauppauge Fire Department, where he announced new guidelines for battery storage.

    The visit takes place as proposals for battery storage facilities have been considered in several communities, including Hauppauge, Holtsville, and Glenwood Landing. Elsewhere in the nation, fires have broken out in the last 15 months at lithium-ion battery storage facilities. On Long Island, residents are raising concerns about potential safety risks, health impacts and environmental consequences – particularly in densely populated areas where families live, work, attend school and gather for worship.

    “It’s the local first responders who are going to be in danger in dealing with this,” Zeldin, a former congressman in New York, said.

    Many towns across Long Island have temporarily halted the development of battery storage facilities as they reassess safety concerns. “This is a regional issue: this isn’t a Nassau County issue, it isn’t just a Suffolk County issue, it’s the whole of Long Island together who don’t want these battery warehouses in their communities,” Nassau County Executive Bruce Blakeman said in a news release about guidelines.

    The EPA said in a news release that New York State’s Renewable Action through Project Interconnection and Deployment Act “dramatically expanded state power to override local opposition” for projects that include battery storage facilities.

    But the state maintains that permitting for these facilities are already handled at the local level.  Recently, the state enacted what FDNY officials describe as “among the most stringent” battery energy storage safety regulations in the country.

    The storage systems play a role in the state’s reduced-carbon energy initiatives. But Zeldin, in a news release about the battery energy storage systems, charged it was “partisan push to fill yet another delusional ‘green’ goal.”

    Yet the state maintains that the EPA’s stance is not protecting the environment.

    “Lee Zeldin’s job is to protect the environment, but he has been doing anything but that,” Ken Lovett, senior communications advisor on energy and environment for Gov. Kathy Hochul, said in a written statement to LIBN.

    “His continued assault on clean energy and his push for rollbacks on environmental protections will hurt everyone in his home state of New York and across the country and fly in the face of the federal government’s claim of wanting U.S. energy independence,” Lovett said. “While other states are rapidly investing in storage to stabilize their grids and lower costs, Zeldin’s approach risks leaving New York’s economy behind and forcing New Yorkers to pay.”

    Meanwhile, Zeldin said, the EPA has issued the “guidelines based on our own experiences, our own lessons learned, the technical expertise that we have.”

    Zeldin said that “the next time there is a lithium fire, our agency is ready to be there.”

    The new EPA guidelines are available here.


    Adina Genn

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  • Photoncycle targets low-cost energy storage with a clever hydrogen solution | TechCrunch

    Photoncycle targets low-cost energy storage with a clever hydrogen solution | TechCrunch

    For years, the solar energy sector has grappled with interseasonal energy storage. The ability to harness the surplus solar energy of summer months for use during the winter has remained an elusive goal, with existing solutions like batteries falling short due to prohibitive costs and limited lifespans. Hydrogen, meanwhile, despite its clean-burning properties, has been sidelined due to inefficiency and high costs.

    Photoncycle — a startup emerging from the depths of an accelerator in Oslo Science Park in Oslo, Norway — has been working on a solution. With a vision as bright as the summer sun, the startup claims its solid hydrogen-based technology can store energy more efficiently in an ammonia synthesis reactor. The claim is this tech does the storage more cost-effectively than any battery or liquid hydrogen solution on the market.

     

    A schematic of how Photoncycle envisions its full system when installed at a house. Image Credits: Photoncycle

    “Lithium-ion batteries use costly metals. Our material is super cheap: To store 10,000 kilowatt-hours, it costs around $1,500, so it’s almost nothing. In addition, our storage solution is 20 times the density of a lithium-ion battery, and you don’t lose the current,” founder and CEO Bjørn Brandtzaeg explains in an interview with TechCrunch. “That means we have a system where you can contain energy over time, enabling seasonal storage. It’s a completely different thing than traditional batteries.” 

    Photoncycle employs water and electricity to produce hydrogen. That in itself isn’t uncommon if you’ve been following fuel cell vehicle technology. However, the company’s approach incorporates an innovative twist: a reversible high-temperature fuel cell. This advanced fuel cell can produce hydrogen and generate electricity within the same unit. 

    The core of Photoncycle’s innovation lies in its treatment of hydrogen. They process the hydrogen and then utilize its technology to convert and store it in a solid form. The company claims this storage method is not only safe, owing to the non-flammable and non-explosive nature of the solid state, but also highly efficient. It enables hydrogen storage at densities approximately 50% greater than liquid hydrogen, presenting a significant advancement in hydrogen storage solutions. These innovations form the cornerstone of Photoncycle’s system, facilitating safe and dense hydrogen storage, which the company says is a huge step forward in energy technology.

    Current clean energy solutions such as rooftop solar power are limited by inconsistent supply due to the unpredictable nature of weather conditions. A robust, reusable energy storage solution could bridge these timings, ensuring a stable energy supply when these renewable sources encounter unavoidable intermittent periods. 

    Great in theory, but not without its own challenges.

    “The Netherlands is the country in Europe with the highest density of rooftop solar. We are seeing a massive ramp now because of high energy prices; everyone wants solar on the roof,” Brandtzaeg says. He adds, however, that this method can backfire for homeowners: “In July last year, in the Netherlands, in the middle of the day, you had to pay €500 a megawatt hour to export your electricity.”

    Putting the energy storage along with the house generating the power effectively lets houses go off-grid. Photoncycle says it has tested and worked the main components of its solution — the next step is to integrate it into a system. If successful, the company says it can seriously challenge Powerwall, Tesla’s lithium-ion battery solution.

    David Gerez, CTO at Photoncycle, and Ole Laugerud, who is a Photoncycle chemist, in Photoncycle’s purpose-built lab, which has been operational for close to two years. Image Credits: Photoncycle

    “This is a relatively complex system — that’s why we have so many PhDs in different disciplines working on this. The reason why Elon Musk said that hydrogen is stupid, is that when you convert electricity to hydrogen and back, you are losing quite a bit of energy,” Brandtzaeg says. He believes his company can turn this bug into a feature. “In a residential setting where 70% of energy needs are heating, there is an opportunity to use that excess heat to provide hot water. We will target markets where people are using natural gas for heating at the moment and then replace the gas boiler in the house using the existing water-based infrastructure.”

    Brandtzaeg’s confidence regarding the concept’s operational framework is compelling. He gestured toward a small mock-up of their operations plant within their labs, scaled down to the size of a car battery. Brandtzaeg believes this scaling should be problem-free, citing it as the primary reason they felt confident moving forward with the project. 

    When it comes to power delivery, it takes a little while for the hydrogen to generate electricity, so while it is spooling up, the company relies on an intermediary, more conventional, battery for load balancing. The firm certainly has investors’ attention: Photoncycle just raised $5.3 million (€5 million) to build its first few power storage devices in Denmark, which Photoncycle has chosen as its test market. 

    “We could have raised 10 times as much as we did, given the interest. But after this raise, I’m still a majority owner,” Brandtzaeg says. “I wanted to keep control over the business as long as possible and not raise more capital than we need to bring this service to market.” 

    Haje Jan Kamps

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  • Why cheap US gas costs a fortune in Europe

    Why cheap US gas costs a fortune in Europe

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    The EU is under immense pressure to cap the price of imported natural gas to contain energy costs — but many of the companies making a fortune selling cheap U.S. gas to the Continent at eye-watering markups are European.

    The liquefied natural gas (LNG) loaded on to tankers at U.S. ports costs nearly four times more on the other side of the Atlantic, largely due to the market disruption caused by a near-total loss of Russian deliveries following the invasion of Ukraine.

    The European Commission has come under fierce pressure to sketch out a gas price cap plan, but some countries, led by Germany, worry such a measure could prompt shippers to send gas cargoes elsewhere. The Commission is also reluctant, and its proposal issued Tuesday sets such demanding requirements that they weren’t met even during this summer’s price emergency.

    But a large part of the trade is in European hands, according to America’s biggest LNG exporter.

    “Ninety percent of everything we produce is sold to third parties, and most of our customers are utilities — the Enels, the Endesas, the Naturgys, the Centricas and the Engies of the world,” said Corey Grindal, executive vice president for worldwide trading at Cheniere Energy, rattling off the names of big-name European energy providers.

    Cheniere, which this year saw 70 percent of its exported LNG sail to Europe, sells its gas on a fix-priced scheme based on the American benchmark price, dubbed Henry Hub, which is currently at about $6 per million British thermal units.

    On average, the price across all Cheniere contracts is 115 percent of Henry Hub plus $3, Grindal said. That works out to about €33 per megawatt-hour. For comparison, the current EU benchmark rate, dubbed TTF, is €119 per MWh.

    It’s a big markup for whoever is reselling those LNG cargoes into Europe’s wholesale market, profiting from fears that there may not be enough gas to last the winter.

    Despite fears that any EU cap will send gas to higher bidders in Asia and result in bloc-wide shortages, Grindal gave a resounding “no” when asked if a cap would have any impact on how Cheniere does business with European companies.

    “Our balance sheet is underpinned by those long-term contracts,” he added.

    Translation: If buyers choose to trade their precious cargoes away for higher profits beyond Europe once they receive them, that’s their decision.

    Blame game

    “The United States is a producer of cheap gas that they are selling us at a high price … I don’t think that’s friendly,” said French President Emmanuel Macron | Ludovic Marin/AFP via Getty Images

    The difference between U.S. and EU gas prices hasn’t gone unnoticed by European politicians — but most of the finger-pointing has been at American producers rather than the resellers closer to home.

    “In today’s geopolitical context, among countries that support Ukraine there are two categories being created in the gas market: those who are paying dearly and those who are selling at very high prices,” French President Emmanuel Macron told a group of industrial players last week. “The United States is a producer of cheap gas that they are selling us at a high price … I don’t think that’s friendly.”

    Macron’s dig conveniently ignored that the largest European holder of long-term U.S. gas contracts is none other than France’s own TotalEnergies.

    At the company’s latest earnings call last month, TotalEnergies CFO Jean-Pierre Sbraire trumpeted the fact that the firm’s access to more than 10 million tons of U.S. LNG annually “is a huge advantage for our traders, who can arbitrage between the U.S. and Europe.”

    “And now, given the price of LNG, each cargo represents something like $80 million, even $100 million. So, when we are able reroute or to arbitrage between the different markets, of course, it’s a very efficient way to maximize the value coming from that business,” Sbaire added. “Cash flow generation of this order of magnitude marks the start of a new era for the company.”

    Spain’s Naturgy — which has some 5 million tons of U.S. LNG a year from Cheniere under contract — has also earned nearly five times more trading gas so far this year compared with 2021 thanks to “the increased spread between [Henry Hub] and TTF,” it wrote in its half-year report.

    Long-term contracts with the U.S. weren’t always so profitable. In fact, from 2016 to at least 2018, buyers were mostly losing money on the fixed deals, leading some to sell them off.

    In 2019 Spain’s Iberdrola, for example, pawned off its 20-year Cheniere contract to Asian trader Pavilion Energy, which is now benefiting from selling into a high-priced global market.

    In the U.K, Centrica tried — and failed — to sell off its LNG portfolio in 2020 when government-ordered lockdowns drove real-time prices through the floor. That included a 20-year fixed Cheniere contract set to run through 2038.

    Now that real-time prices have shot back up, Centrica — part of Shell-owned British Gas — is reaping the rewards and eagerly snapping up more long-term contracts, most recently a 15-year deal with U.S. LNG exporter Delfin beginning in 2026.

    “This is a really important profit stream for us,” Centrica CFO Chris O’Shea told investors on a Friday trading update call.

    Unlike some producers — for example in the Middle East — which restrict the final destination of the LNG to consumers in Asia and prevent it being sold onward at a higher price, American gas changes ownership the minute it’s loaded onto a ship and comes with no strings attached.

    That leaves buyers free to redirect the precious supply wherever it’s most profitable — sometimes at the expense of their downstream clients, if it’s cheaper to break those pre-existing domestic delivery commitments.

    “We can only control what we can control,” said Cheniere’s Grindal. “U.S. LNG is destination-free.”

    But as far as getting it on the ship at previously agreed prices, “our focus is being that reliable supplier, being committed to the obligations that we’ve made to our customers, and we’re committed to doing everything that we can to help the EU in this situation.”

    America Hernandez

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