Looking At Geothermal Energy Through An International Lens
Amanda Kolker. Photo by Amy Griffin, NREL
From Iceland to Alaska to France, NREL geoscientist Amanda Kolker has studied geothermal energy all around the world. After graduating with a bachelor’s degree in geology, Kolker went to study volcano and glacier interactions in Iceland but was quickly distracted by Iceland’s vast geothermal energy systems.
As an earth scientist, climate change has been on Kolker’s radar for most of her life, so studying geothermal energy was the perfect combination of her interest in earth science and passion for tackling climate change. Now at NREL, Kolker has brought her global perspective to help improve our understanding of geothermal resources and expand our utilization of those resources such as for heating and cooling.
Bringing Lessons Learned to NREL
After her travels, Kolker came to NREL to continue combining her passions for geothermal energy and tackling climate change. Kolker has worked on a variety of projects ranging from resource assessments to techno-economic analysis of geothermal district heating systems.
Now, Kolker is working on an exciting new international project, working with partners in Iceland and four other European countries to explore “supercritical” energy resources and systems and apply lessons learned to demonstration sites in Iceland and Oregon. Because supercritical resources may be able to produce 10 times the amount of energy from one well as a typical geothermal plant, it would be extremely beneficial to tap into these resources.
Looking Beyond Iceland
Kolker dedicated the next phase of her career to exploring for geothermal resources, earning a Ph.D. from the University of Alaska. There, she helped develop the lowest-temperature geothermal resource in the world for a combined heat and power microgrid in Alaska.
That system uses one resource to generate electricity, heat greenhouses and log cabins, and cool an ice museum. Her Ph.D. research and subsequent consulting work focused on looking at replicating that approach at other geothermal systems near remote communities in Alaska with high costs of power, high costs of heat, and low energy resilience.
Many years later, Kolker moved to France and witnessed how lower temperature geothermal resources were used for agriculture, industry, and to heat and cool districts. Many European and Asian countries use shared heating and cooling systems; studying these French systems helped Kolker bring key lessons back to the United States.
“If we want to better utilize the vast potential of geothermal energy in the United States, we need a bit of a paradigm shift,” Kolker said. “Renewable heating and cooling technologies should be given the same degree of attention as renewable electricity technologies, as heating and cooling accounts for up to 40% of U.S. energy demand. That demand is still mostly met by combustion of fossil fuels, producing temperatures well above what is typically needed.”
Amanda Kolker while traveling in Akutan, Alaska. Photo courtesy of Amanda Kolker, NREL
Leveraging Industry Partnerships
Assessing characterization and use of earth’s subsurface resources, she is keeping an eye on the relationship between the fossil fuel and geothermal sectors, as oil and gas companies have useful subsurface data that the geothermal energy sector needs.
She has seen how government involvement in countries like Japan, France, and Iceland have pushed geothermal heat and power projects through to development, and Kolker is excited to see how DOE will continue to help push geothermal energy research to take off even more.
From her global travels, Kolker has been inspired by several things, including:
- Collaborations among subsurface industries
- Governments taking on risks
- Focusing heavily on heating and cooling
- Geothermal Combined heat-and-power (CHP) microgrids for energy resilience.
Notably, Kolker was highlighted in DOE’s Women in Energy series and recently published 2021 U.S. Geothermal Power Production and District Heating Market Report, along with her co-authors.
Learn more about her colleagues and NREL’s geothermal research.
Article courtesy of National Renewable Energy Laboratory (NREL).
Featured photo by Matt Palmer on Unsplash.
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Mercedes-Benz is gearing up to unveil the electric version of its best-selling SUV, the GLC, later this year. With its official debut just around the corner, Mercedes revealed a few new details, offering an exclusive first look at the new EV.
Mercedes offers an exclusive look at the new electric GLC
Although we got a sneak peek of the electric SUV in March during winter testing in Northern Sweden, Mercedes is giving us a better idea of what to expect.
“We’re not just introducing a new model – we’re electrifying our top seller,” Mercedes-Benz Group CEO, Ola Källenius, said on Thursday.
Mercedes promises the electric GLC “sets new standards” with a sleek new design, advanced tech, and its new MB.OS operating system.
The new GLC EV is an upgrade over the current model, offering significantly more space and improved ride quality. Since the wheelbase is 3.1″ longer than the current gas-powered SUV, the electric version has more legroom and headroom for front and rear passengers.
With all the seats folded, the electric SUV offers 61.4 cubic feet of space. The gas-powered model features up to 56.3 cubic feet of cargo space. Plus, you get an extra 4.5 cu ft of space in the trunk (front trunk).
Källenius said that with Mercedes’ new 800V electric architecture and latest batteries, the electric GLC can regain around 260 km (161 miles) WLTP range in just ten minutes. He added that DC fast charging at over 320 kW is possible.
The GLC 400 4MATIC with EQ Technology will arrive with impressive towing capability of up to 5,291 lbs. In comparison, the Tesla Model Y can only tow up to 3,500 lbs.
Added features, such as ESP trailer stabilization and trailer maneuvering assistant, make it even easier to tow with optimized stability and control.
Källenius also teased the new electric GLC design, calling it the start of a “new era” and “a new face of the brand as the first in a family of upcoming vehicles.”
The inside is just as impressive, providing a holistic experience. A “majestically floating next generation MBUX Hyperscreen” is optional, providing a spatial experience powered by the new MB.OS supercomputer.
Mercedes will unveil the new electric GLC at the 2025 International Motor Show in Munich on September 7, 2025.
Although official range figures will be revealed at the event, according to Car and Driver, which tested a prototype model, Mercedes said it expects the new GLC to provide a WLTP range of just over 400 miles, or slightly more than 300 miles on the EPA scale, from a 94.5 kWh battery.
Prices will also be announced in due time, but given that the current GLC 350e 4MATIC PHEV starts at $59,900 in the US, you can expect the electric model to be priced slightly higher, at around $65,000.
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Tesla (TSLA) announced its 2025 annual shareholders meeting at the very last minute, and it pushed it all the way to November, the latest it has ever held the meeting.
Tesla generally holds its annual meeting in the summer and announces it way ahead of time.
Today, the automaker announced that the meeting will be held on November 6:
The board of directors (the “Board”) of Tesla, Inc. (“Tesla”) has designated November 6, 2025 as the date of Tesla’s 2025 annual meeting of shareholders (the “2025 Annual Meeting”).
This is highly unusual for Tesla. Here are the dates of Tesla’s last 5 annual meetings:
- 2020: September 22, 2020
- 2021: October 7, 2021
- 2022: August 4, 2022
- 2023: May 16, 2023
- 2024: June 13, 2024
At those meetings, shareholders vote on several matters, including the reelection of directors and shareholders’ proposals.
Tesla has not released any yet, but they are expected to be in the upcoming proxy statement, which Tesla should release in the coming weeks.
Why does Tesla need more time?
Electrek’s Take
I think Tesla is working on some proposals that are going to take time to put together and then to sell to shareholders – hence why the meeting is set for November.
There are two suspects: a new CEO compensation package for Musk or a merger/acquisition of xAI.
It could also be both, but I think that would be harder to swallow for some shareholders as both initiatives have a clear aim of giving Musk a bigger stake in Tesla.
I think sane investors should not want that, but Tesla shareholders don’t fit in that category. Much of Tesla’s value is attached to Musk’s lies and ridiculous predictions. The value will have to come down to reality at some point, but they are a bunch of gamblers who are enjoying the ride in the meantime.
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A three-row electric SUV for less than $30,000? Sign me up. NIO (NYSE: NIO) opened pre-orders for the new Onvo L90 on Thursday, starting from 193,900 yuan, or about $27,000.
NIO kicks off Onvo L90 pre-orders in China
NIO claims the Onvo L90 is the lightest full-size three-row SUV in its class, with a curb weight just under 5,000 lbs (2,250 kg). In comparison, the Lucid Gravity has a curb weight of 5,966 lbs (2,712 kg).
The new flagship model is designed as a family-friendly SUV, offering ample interior space and advanced technology.
At 5,145 mm long, 1,998 mm wide, and 1,766 mm tall, the Onvo L90 is slightly bigger than the Lucid Gravity. In China, it will go head-to-head with higher-end electric SUVs like Li Auto’s L9.
However, the L9 is an extended-range electric vehicle (EREV) and starts at around 409,800 yuan ($57,000), more than double the price of the Onvo L90.
The low price of 193,900 yuan ($27,000) applies only to those who rent the battery. Nio’s Battery as a Service (BaaS) costs 899 yuan ($125) a month. With the battery included, the Onvo L90 still starts at just 279,900 yuan ($39,000).
Nio’s new electric SUV is offered in six and seven-seat configurations. The interior features a massive 17.2″ floating infotainment screen at the center.
Other interior highlights include a three-zone climate control system, massage, heating, and ventilation for every seat, as well as an additional entertainment screen for rear passengers. And like many new vehicles in China nowadays, it even comes with a built-in refrigerator.
Powered by an 85 kWh battery, the Onvo L90 offers a CLTC range of 605 km (367 miles). It’s also based on NIO’s next-gen 900V platform, unlocking class-leading energy consumption of just 14.5 kWh per 100 km.
Buyers can choose from single and all-wheel-drive powertrains. The AWD version boasts up to 590 hp (440 kW), good for a 0 to 100 km/h (0 to 62 mph) sprint in just 4.7 seconds.
NIO is offering an incentive for early pre-order holders. Those who place an order with a 2,000 yuan deposit will receive a 5,000 yuan credit off the vehicle and an extra 5,000 yuan for optional features and more. Nio plans to begin delivering Onvo L90 to customers, starting on August 1.
The L90 is the second Onvo-branded EV to arrive in China, following the smaller L60, launched last September.
Source: CarNewsChina, NIO Onvo
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