How super-hot rocks miles under the earth’s surface could help combat climate change
The iconic Old Faithful Geyser springs to life (every 90 minutes) in Yellowstone National Park’s Upper Geyser Basin on September 18, 2022, in Yellowstone National Park, Wyoming. Sitting atop an active volcanic caldera, Yellowstone, America’s first National Park, is home to more geological hydrothermal features (geysers, mud pots, hot springs, fumaroles) than are found in the rest of the world combined.
George Rose | Getty Images News | Getty Images
The future of clean, renewable energy is underneath our feet. Quite literally.
The core of the earth is very hot — somewhere between 7,952 degrees and 10,800 degrees Fahrenheit at the very center. If we can drill down from the surface into what’s called superhot rock, then we could access the heat of the earth and turn it into a massive source of zero-carbon, always available energy.
A new report out Friday from the Clean Air Task Force, a non-profit climate organization, finds that this category of clean, baseload superhot rock energy has the potential to be cost-competitive with other zero-carbon technologies — while also, very critically, having a small land footprint.
The Clean Air Task Force commissioned a non-profit geothermal organization, the Hot Rock Energy Research Organization, and an international clean energy consultancy, LucidCatalyst, to estimate the levelized cost of commercial-scale superhot rock electricity. They determined that it could eventually cost between $20 and $35 per megawatt hour, which is competitive with what energy from natural gas plants costs today.
This is not reality yet. Currently, there are no superhot rock geothermal energy systems operating and delivering energy, Bruce Hill, the chief geoscientist at Clean Air Task Force and the author of the report, told CNBC. But money is flowing into research projects and companies that are working to develop the technology.
The report posits that superhot rock energy can be commercialized in the 2030s, and argues that its unique set of features — it’s a clean source of inexhaustible baseload energy with a small footprint — make the investment worthwhile.
“It will take public and private investment similar to those being allocated to nuclear, carbon capture, and hydrogen fuels,” Hill told CNBC. “Geothermal programs receive far less funding from Congress and the U.S. Department of Energy than these other programs. Superhot rock geothermal isn’t even in the decarbonization debate — but given a decade or two of aggressive investment it could be producing baseload power — local, energy dense, clean-firm (baseload) and competitive,” from a price perspective.
The graphic here shows that if technology develops allowing the drilling into hot, dry rock, superhot rock geothermal energy can be available virtually anywhere.
Graphic courtesy Clear Air Task Force
Regular versus superhot geothermal
While energy from superhot rocks is not being used now, geothermal energy is being used in a few places where super-hot temperatures exist close to the surface of the earth. Currently, about 16 gigawatts of power come from geothermal globally, according to CATF — that’s less than 0.2% of the world’s total. For comparison, there is 2,100 terawatts of capacity for coal energy globally and 1 terawatt of capacity for energy generated from photovoltaics, or solar panels.
But accessing superhot rock energy involves tapping into hotter, dry rock — which is everywhere, but sometimes far beneath the surface.
The deepest borehole ever drilled in the earth went down almost 8 miles in the Kola Peninsula of Russia in the 1970s, but the rock there was not nearly as hot as 752 degrees Fahrenheit — the minimum required for this type of energy. (Rock starts melting at between 1,112 and 1,832 degrees Fahrenheit, so the functional window for superhot rock geothermal is roughly between 752 and 1022 degrees Fahrenheit, Hill said.)
How far you have to drill to get to 752 degrees depends on where you are. On the edges of the tectonic plate boundaries or near recent volcanic activity, it might be two miles down, Hill told CNBC, but in the middle of a continent you might have to go down 12 miles.
Water would be pumped down into the hole and returned to the earth in a super-heated state known as “supercritical,”, which has the properties of gas and liquid at the same time. That supercritical water would then be directed to power generators.
Conventional geothermal energy systems “have a very small but measurable carbon footprint,” Hill told CNBC. That is why the Hellisheiði ON Power plant in Iceland has a Carbfix crarbon capture plant attached to it. A superhot rock energy system would have some carbon emissions associated with the construction of the plants, but “because the working fluid, water, is injected into dry rock there are no such hydrothermal related carbon dioxide emissions,” Hill said.
To access superhot rock geothermal energy requires drilling down to rock that is 400 degrees Celsius, or 752 degrees Fahrenheit.
Graphic courtesy Clear Air Task Force
Iceland is a leader in investigating superhot rock geothermal energy with its Iceland Deep Drilling Project. A test there suggests one well could produce 36 megawatts of energy, which is five to ten times more than the typical three to five megawatts of energy a conventional geothermal well could generate.
Iceland is well suited to study geothermal energy because of it’s located where the American and Eurasian crustal plates are pulling apart from each other.
“We are replenished with constant supplies of magma energy to feed our geothermal systems,” Guðmundur Ó. Friðleifsson, who served as a coordinator and principal investigator in the IDDP effort for over 20 years, told CNBC. “Magma energy is also at relatively shallow depths and relatively easily accessed, and Icelanders by nature are explorers of Celtic and Norse origin who love to sail into or out to the unknown,” Friðleifsson said.
Beyond Iceland, Italy, Japan, New Zealand and the United States are leaders in superhot rock geothermal, according to Friðleifsson. Other areas on the edges of tectonic plates, including Central America, Indonesia, Kenya and the Philippines, also have some development.
For superhot rock geothermal energy to be commercialized and deployed broadly will require new technology, including rapid ultra-deep drilling methods, heat-resistant well materials and tools, and ways to develop deep-heat reservoirs in hot dry rock.
These are not insignificant, but they are “engineering challenges, not needed scientific breakthroughs,” the CATF report says.
For example, drilling into hard crystalline rock takes a long time with current rotation drill techniques and the drill bits have to be replaced frequently. One potential solution is using energy instead of a mechanical drill.
Quaise Energy is develoing such a drill, building on research from Paul Woskov at MIT. The Quaise drill is being tested at Oak Ridge National Laboratory, according to CATF.
“The solution to drilling is to replace the mechanical grinding process with a pure energy-matter interaction. Sufficient energy intensity will always melt-vaporize rock without need for physical tools,” Woskov told CNBC.
“Directed energy drilling has been considered since the laser was invented in the 1960s, but so far unsuccessfully because the infrared wavelengths are scattered in a drilling environment, the laser sources are of too low average power, and lasers sources are not efficient. We now have gyrotron sources since the 1990s that operate at millimeter-wavelengths that are more robust in a drilling environment, more powerful, and more efficient.”
It will take innovation and investment over coming decades to be able to commercialize terawatts of superhot rock geothermal energy.
Graphic courtesy Clear Air Task Force
‘Very small’ investment so far
So far, private investment in the superhot rock space is “very small,” according to Hill. CATF didn’t have an exact number, but they estimate it’s in the hundreds of millions of dollars at the most, and this includes investments by the Newberry Geothermal Energy consortium for work done 10 or 15 years ago, Hill said.
But it’s getting easier to raise money in the space, according to Carlos Araque, the CEO of Quaise, which has raised $75 million so far, including $70 million in venture capital.
“The first 10 [million] took a lot longer than the other 65 because it was done in the 2018-20 period; things accelerated significantly in the 2021-22 period probably pushed by many investors realizing the need for new tech in this space,” Araque told CNBC. “Investors are increasingly aware that we need to invest now on the technologies that will enable full decarbonization towards 2050.”
Investor Vinod Khosla, the first backer of Quaise, recently talked to CNBC about his belief in backing potentially revolutionary technologies to fight climate change, and pointed to super hot rock geothermal as an example.
“A superhot rock well, like 500 degrees, will produce 10 times the power of a 200-degree well. And that’s what we need,” Khosla told CNBC. “If we can drill deep enough we can get to those temperatures — many, many — all of Western United States could be powered with just geothermal wells, because there’s geothermal everywhere if you go 15 kilometers, 10 miles deep.”
The CATF report said that big tech companies, and their associated deep pockets, could have “an important role” in funding the early development and commercialization of superhot rock energy by buying power purchase agreements or investment dollars to power “rapidly expanding energy intensive operations like data centers,” the report said.
Indeed, Microsoft President Brad Smith spoke in Seattle about how vital it is for Microsoft to expand access to clean sources of energy to be able to continue to expand its business.
Oil and gas companies could use their resources to help spur development in the superhot rock industry, the CATF report said. “Drilling deep into the Earth to produce energy is the oil and gas industry’s core expertise, which provided innovations that drove a rapid transformation of shale fossil energy resources previously considered impossible.”
The government is also chipping in. The U.S. Department of Energy also has up to $20 million available in funding to develop better and faster geothermal drilling. Also, President Biden’s Bipartisan Infrastructure Law allocates $84 million for the U.S. Department of Energy’s Geothermal Technologies Office to build four pilot demonstration sites of what it calls enhanced geothermal systems, including superhot rock geothermal. Similarly, the Department of Energy recently announced Enhanced Geothermal Shot in an effort to reduce the cost of enhanced geothermal systems by 90%, to $45 per megawatt hour, by 2035.
It’s an exciting week for grid resiliency-lovers in California, as Governor Gavin Newsom followed up his earlier smart grid law and signed another law this week which may require bidirectional charging on EVs in the future – though the law has no hard timeline attached, so it may be a while before we see this happen.
Bidirectional charging refers to the capability of electric vehicles to not just take electricity from the grid to charge, but to output electricity in various forms, whether this be vehicle-to-load (plugging in devices, like the 1.8kW capability on the Kia Niro EV), vehicle-to-home (like Ford’s “Intelligent Backup Power” system), or vehicle-to-grid (like the Nissan Leaf is capable of).
While these applications may seem like a party trick, widespread use of bidirectional charging could lead to huge benefits for efficiency, grid resiliency, and enable much greater penetration of renewable electricity generation.
Most electric grids don’t really have trouble meeting the regular everyday needs of electricity consumers, it’s when big spikes happen that things get difficult. Either on a hot day when everyone is using air conditioning, or a day when electricity generation is curtailed for some reason or another, that’s when things get difficult.
And as climate change makes temperatures hotter, California’s grid is often overtaxed on the hottest summer days, which are becoming more numerous. Even worse, methane-burning fossil gas peaker plants are the highest-polluting form of electricity California consumes, and these are currently used at peak times in order to deal with high demand.
One solution to this problem is adding energy storage to the grid which can be dispatched when needed, and which can fill up when the grid is oversupplying electricity. This helps to balance out supply and demand of electricity and make everything a little more predictable.
This is why there has been a push for grid-based storage like Tesla megapacks, which represent a large source of rapidly-dispatchable energy storage.
But there’s another source of grid-connected batteries out there which was right under our nose the whole time: electric cars.
EVs, which are mostly connected to the internet anyway, could be used as a distributed energy storage device, and even called upon to help provide electricity when the grid needs it. We already see this happening with Virtual Power Plants based on stationary storage, but if cars had V2G, theoretically cars could contribute in a similar way – both saving the grid, and perhaps making their owners some money along the way via arbitrage (buying electricity when its cheap and selling it when its expensive).
The problem is, not many automakers have included V2G capabilities in their cars, and in the cars that do have it, not many manufacturers have made V2G-capable equipment, and the ones who have built it haven’t seen that many customers who are interested in spending the extra money to upgrade their electrical systems with V2G-capable equipment.
So there needs to be something to jumpstart all of that, and California thinks it might just have the thing.
New CA law might require bidirectional charging… eventually.
The idea started in 2023 when state Senator Nancy Skinner introduced a bill which would require EVs to have bidirectional charging by 2027.
As this bill made its way through the legislative process, it got watered down from that ambitious timeline. So the current form of the bill, which is now called SB 59, took away that timeline and instead gave the California Energy Commission (CEC) the go-ahead to issue a requirement whenever they see it fit.
The bill directs the CEC, the California Air Resources Board, and the California Public Utilities Commission to examine the use cases of bidirectional charging and give them the power to require specific weight classes of EVs to be bidirectional-capable if a compelling use case exists.
The state already estimates that integrating EVs into the grid could save $1 billion in costs annually, so there’s definitely a use case there, but the question is the cost and immediacy of building those vehicles into the grid.
The reason this can’t be done immediately is that cars take time to design, and while adding bidirectional charging to an EV isn’t the most difficult process, it also only really becomes useful with a whole ecosystem of services around the vehicle.
Even Tesla, which for years has touted itself a tech/energy company and sold powerwalls, inverters, solar panels and so on, is still only gradually trickling its bidirectional Powershare feature out onto its vehicles.
And that ecosystem has been a bit of a hard sell so far. It’s all well and good to tell someone they can make $500/year by selling energy to the grid, but then you have to convince them to buy a more expensive charging unit and keep their car plugged in all the time, with someone else managing its energy storage. Some consumers might push back against that, so part of CEC’s job is to wait to pull the trigger until it becomes apparent that people are actually interested in the end-user use case for V2G – otherwise, no sense in requiring a feature that nobody is going to use.
Electrek’s Take
Given all of these influences, we wouldn’t expect CA to require bidirectional charging any time soon. But it still gives the state a powerful trigger to pull if other efforts, like the recently-signed smart grid law, turn out not to be enough as California works to, grow, clean up, and make its grid more affordable all at the same time.
But having the force of law behind it could turn V2G into less of a parlor trick and more into something that actually makes a difference the way us EV nerds have been dreaming of for decades now (true story: Electrek once turned down Margot Robbie for an interview and instead talked to some engineers about V2G for an hour).
So, telling manufacturers that California may start mandating bidirectional charging soon means that those manufacturers will perhaps start taking V2G more seriously, particularly given the size and influence of CA’s car market. Even if the CEC doesn’t make it a requirement, the threat of it eventually becoming one means that EV-makers will probably start getting ready for it regardless.
There’s no real point to a single person discharging their car into the grid, but when millions of cars are involved, you could work to flatten out the famous “duck curve,” which describes the imbalance between electricity supply and demand. We hear a lot about “intermittency” as the problem with wind and solar, and grid storage as the solution to that, so being able to immediately switch on gigawatt-hours worth of installed storage capacity would certainly help to solve that problem. And we hope this law helps us get just a little closer to that potential future.
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Japanese equipment giant Komatsu dropped its new, 320-ton Power Agnostic 930E mining truck at MinsExpo trade show in Las Vegas, calling it a future-ready solution that can run on diesel, hydrogen, or pure electric power.
Komatsu continues to develop alternative engine technology with the release of its first commercial rigid-frame dump truck with a “power agnostic” platform for running on diesel, hydrogen, or even battery electric power.
That’s because the platform is designed around the concept of a modular powertrain. The design not only gives the Komatsu assembly line an easy way to build diesel, BEV, and hydrogen fuel cell rigid haulers on the same line, but also enables customers to upgrade from diesel to battery electric or hydrogen down the road, if and when whatever logistical obstacles that are preventing them from running an electric or hydrogen solution today are overcome.
“This platform enables mining companies to start with conventional diesel engines and gradually transition to cleaner energy sources as needed, including utilization of trolley assist for diesel or as one of the future dynamic charging solutions for battery trucks to reduce fuel consumption and emissions,” reads Komatsu’s press material. “Whether adopting battery technology, hydrogen fuel cell technology or a combination of energy systems, the Power Agnostic 930E provides the infrastructure and adaptability necessary to meet evolving sustainability goals.”
Potential customers got a sneak peek at the concept truck, which they were apparently allowed to test at Komatsu’s Arizona proving grounds ahead of MineExpo (I wasn’t invited). The first pre-production Power Agnostic 930E prototype will make its way to Sweden in the coming months, where it will be put to work alongside other electric Komatsu machines in Boliden’s Aitik copper mine, one of the largest such operations on the European continent.
Electrek’s Take
Converting gas and diesel-fueled cars to electric at scale is a concept that’s fraught with problems. Far too many to list here, in fact. But heavy equipment?
Everything from excavators to loaders to heavy trucks are already built to be powertrain agnostic, and manufacturers will often offer the same basic vehicle with Cummins, Detroit Diesel, or Volvo Pentapower, so there’s a degree of openness baked into those systems already. Komatsu is just taking that to the next level by adding a modularity of energy storage (fuel tanks, hydrogen cells, or battery packs) to the mix. And, if the project is successful, it could be the first of many.
SOURCE | IMAGES: Komatsu; Equipment World.
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isinwheel’s terrific personal EVs “bring all the things you want closer to you.” Whether it’s an electric scooter, an e-bike, or an e-skateboard, the three things you’re guaranteed to get no matter which you choose are fun, safety, and affordability.
We’re taking a closer look below at six of isinwheel’s personal EVs – could one of these be your next electric ride?
Table of contents
isinwheel S9Pro commuting electric scooter
Meet the isinwheel S9Pro, the best value-for-money electric scooter that zips you through your day at speeds up to 19 mph with a range of 19 miles – perfect for your daily commute.
The S9Pro‘s powerful 350W motor delivers a smooth, efficient ride without breaking the bank. With a lightweight, foldable aluminum frame, it’s easy to carry, store, and even pop into your car trunk or onto public transport. Plus, the quick one-step folding mechanism makes it the ultimate on-the-go companion.
You can find the S9Pro on Amazon here.
isinwheel S10Max long-range electric scooter
The isinwheel S10Max is your ultimate high-performance ride, powered by a beastly 1000W motor that conquers any terrain with ease. With an impressive range of up to 37 miles, you can enjoy long-distance adventures without worrying about recharging.
The S10Max‘s all-terrain 10-inch off-road tires, paired with dual shock absorption, provide unbeatable grip and stability whether you’re cruising through city streets, on country paths, or on muddy trails.
You can find the S10Max on Amazon here.
isinwheel GT2 off-road electric scooter
Unleash your adventurous side with the isinwheel GT2. With a powerful 1000W motor, it rockets up to 28 mph, effortlessly conquering steep hills and challenging landscapes for a thrilling ride every time.
Its 11-inch off-road tires are built for all terrains, whether you’re cruising through the city or tackling rugged countryside paths. Plus, with four advanced shock absorbers, every ride is smooth and stable, no matter where your journey takes you. Get ready to ride the GT2 and experience performance like never before!
You can find the GT2 on Amazon here.
isinwheel M10 electric commuter bike
The isinwheel M10 electric commuter bike blends style with power. Crafted from lightweight, rust-resistant aluminum alloy, this sleek ride weighs just 47 pounds, making it easy to carry and tough enough to last.
With a professional 35-speed transmission, the M10 adapts to your every need, whether you’re accelerating, cruising downhill, or conquering steep inclines. With a 500W motor capacity, a top speed of 20 mph, 374 Wh battery capacity, and four hours of charging time, it’s the perfect blend of performance and convenience for your daily commute!
You can find the M10 on Amazon here.
isinwheel U1 folding electric bike
Say hello to the versatile isinwheel U1! With folding handlebars, pedals, and a height-adjustable seat, it’s perfect for easy storage and transport. The U1’s 500W motor comes with a smart chip that instantly adapts to give you that extra boost when you hit an incline, face a headwind, or carry more weight.
The U1 has a top speed of 18 mph, 280 Wh of battery capacity, and three hours of charging time. Whether you’re zipping through city streets or tackling hills, the U1 has you covered with power and portability.
You can find the U1 on Amazon here.
Check out isinwheel’s V8, V6 and V10 electric skateboards
The isinwheel V8 electric skateboard is your ticket to thrilling rides, featuring a top speed of 28 mph and a range of up to 12 miles. Its removable, detachable batteries allow for quick swaps, so you can extend your adventure with ease. Choose from four riding modes and let the gorgeous ambient lights make you stand out, whether you’re cruising in daylight or lighting up the night. With its powerful dual 540W motors and regenerative braking system, the V8 delivers a ride that’s as exhilarating as it is stylish.
The V8 is isinwheel’s first-gen electric skateboard, and we’ve also taken it to the next level. The V6 is perfect for teens and beginners, and the high-performance V10 is for those who crave more power. But we’re not stopping there – this September, we’re launching the V6 PRO, the ultimate cool ride for young skaters and newbies. Stay tuned; it’s going to be epic!
You can find the V8/V6/V10 on Amazon here.
Follow isinwheel on Instagram here, on X here, on YouTube here, and on Facebook here.
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