In 2013, the California Independent System Operator, the entity responsible for managing electricity for 80 percent of California’s power grid, published a chart that showed how energy flowed during a 24- hour spring day in California. The grid they created showed how energy needs increased throughout the day and into the evening, when people were awake and usage levels reached their peak. And, it showed the imbalance between peak energy demand and renewable energy production. When the results were put into a chart, the line looked an awful lot like a duck—hence the Duck Curve was born.

The Duck Curve showed—for the first time—that energy produced from solar power could help offset some of the conventional energy provided by utility companies. The result: cleaner, more sustainable energy that cost a lot less. But there was a catch. Solar could only fill a portion of this gap when the sun was shining, and it couldn’t help during peak evening hours. So, the Duck Curve problem was created.

This means if we can solve the Duck Curve problem through new sources of clean energy, we can have lower electric bills and reduce the negative environmental impact from fossil fuels. Utilizing new, sustainable energy sources means a future with less energy rationing and lower risk of the type of electrical grid breakdowns we’ve seen in California and Texas.

Solar energy isn’t the answer to the Duck Curve problem. Why? Because solar energy is only available during the day when the sun can provide power. This creates a problem. How can we find energy during times when solar energy isn’t available, like during nighttime and on cloudy days?

Without a doubt, geothermal energy is a big part of the solution.

Geothermal energy is energy from the earth. It’s natural, always available, and is our largest untapped natural resource. Geothermal energy comes from deep inside the earth’s core. It’s hot down there, and that energy can be used to power our world. In fact, people in Iceland are already using geothermal energy for 66% of their electricity.

Geothermal energy has many advantages:

• Geothermal energy can be used anywhere in the world.
• Geothermal is always on, regardless of weather conditions or time of day.
• Geothermal can be used for cooling, heating, and electricity.
• Geothermal power can ramp up or down to fill the gaps left by traditional electricity and solar power
• Most geothermal plants will produce nearly zero air emissions

Geothermal can help prevent electrical grid failures

Solar energy may have a duck curve problem, but it has its advantages, too. As does every renewable energy source. Solar energy is a renewable resource with low emissions and a low carbon footprint that can be generated in a wide variety of geographic locations. But no one resource can meet all of our energy needs.

Together we can solve the Duck Curve problem once and for all and build a sustainable energy future. Let’s harness the power and energy within the earth’s core to power our cities and factories. Let’s use the earth to save the earth.

Geothermal Rising
1121 L Street, Suite 700
Sacramento, CA 95814

March 2, 2022

Recommendations for Implementing Geothermal Demonstration Programs

This memo provides recommendations for implementation of geothermal demonstration programs within the U.S. Department of Energy (DOE).

Geothermal energy has the potential to provide massive amounts of clean electricity, heat, and storage. In its landmark GeoVision report, DOE described geothermal as an “always-on source of secure, reliable, and flexible domestic energy that can be utilized across industrial, commercial, and residential sectors.” By DOE’s estimate, geothermal could provide over 120 GW of clean, 24/7 electricity by 2050. Since GeoVision was published in 2019, geothermal innovators and DOE-supported projects are demonstrating a path to unlock these resources. With co-funded investment and strong policy support, the geothermal industry can unleash its full potential.

The Infrastructure Investment and Jobs Act (IIJA) of 2021 provides a unique opportunity to unlock the immense potential of geothermal energy. The IIJA includes several demonstration programs that are well suited to geothermal, including $84M for enhanced geothermal systems (EGS) and several programs under the new DOE Office of Clean Energy Demonstrations (OCED), including: regional hydrogen hubs; long-duration energy storage; clean heat for industrial applications; clean energy projects on current and former mine land; energy improvements in rural and remote areas; and upgrading the electric grid to ensure reliability and resilience.

The recommendations below are focused on supporting successful implementation of 1) the EGS Demonstration Program and 2) demonstration programs included in DOE’s OCED.

Enhanced Geothermal Systems (EGS) Demonstration Program

As DOE’s GeoVision report shows, EGS is a promising technology for deploying vast amounts of clean geothermal energy. To support geothermal’s growth, the IIJA included $84M for EGS demonstration projects from FY22 to FY25, as authorized by the Energy Act of 2020. The Energy Act directs DOE to fund four EGS demonstration projects for power production or direct use, utilizing diverse geologic settings and development techniques. Moreover, at least one project must be located east of the Mississippi River.

DOE should strive to issue its first funding opportunity before the end of FY22. To ensure a successful EGS Demonstration Program, DOE should focus on technological diversity, geographic diversity, use-case diversity, and a milestone-based approach. Each of these is explained in further detail below:

● Technological Diversity: DOE’s GeoVision report includes a broad but clear definition of EGS. Specifically, GeoVision defines EGS as unconventional geothermal resources that “contain heat similar to conventional hydrothermal resources but lack the necessary groundwater and/or rock characteristics to enable energy extraction without innovative subsurface engineering and transformation. Unconventional EGS resources can be found at any above-ambient temperature that supports energy conversion for a given end-use technology application.”

DOE’s definition of EGS is broad, allowing for a range of innovative subsurface technologies that can be applied to multiple use cases, including power generation and direct use. As such, DOE’s funding opportunities should follow the definition of EGS in the GeoVision report, applied across a diversity of geologic settings. This will ensure consistency across funding opportunities, provide clarity to potential applicants, and encourage a wide range of technologies to compete.

● Geographic Diversity: The Energy Act also requires demonstration projects to collectively demonstrate different geologic settings, such as hot sedimentary aquifers, layered geologic systems, supercritical systems, and basement rock systems. A mixture of geographic, geologic, and technical diversity can expand the scope of geothermal energy’s potential applications. To the extent possible, DOE should prioritize locations that demonstrate evidence of promising subsurface characterization.

● Use-Case Diversity: Geothermal has promising applications in power generation, direct use, thermal storage, clean heat for industry, and mineral recovery. The EGS Demonstration Program is authorized to fund projects in both power generation and direct use, so DOE’s funding opportunities should be written to be inclusive of all allowable use cases. The next section will explain how DOE can leverage other IIJA demonstration programs to fund promising geothermal projects with thermal storage and clean heat applications, among others.

● Milestone-Based Approach: DOE is explicitly authorized to utilize a milestone-based approach for the EGS Demonstration Program, as described in Section 9005 of the Energy Act. The Department should pursue this structure, while incorporating the best practices of the successful NASA COTS program, to the extent applicable. Section 9005 provides a clear framework for ensuring consistency, transparency, and accountability in funding opportunities. Crucially, the milestone-based approach includes specific “technical and financial milestones, including estimated project timelines and total costs.” By setting clear expectations, DOE can provide effective program management, mitigate risk, and maximize the impact of taxpayer resources.

DOE Office of Clean Energy Demonstrations (OCED)

In addition to the EGS Demonstration Program, the IIJA established a new DOE Office of Clean Energy Demonstrations (OCED) to support a wide range of clean energy technologies. The IIJA included several programs under OCED for which geothermal is both eligible and uniquely suited to compete, including:

● Regional Clean Hydrogen Hubs $8B ($1.6B for FY22, FY23, FY24, FY25, and FY26)

○ The IIJA includes $8B for DOE to fund at least four regional clean hydrogen hubs. The statute requires at least one project to demonstrate hydrogen production from renewable energy, which can include geothermal. The statute also requires diverse end-uses, including electric power, industrial, residential and commercial heating, and transportation. Geothermal could play a strong role in any of these end-use sectors, particularly residential and commercial heating.

● Energy Storage Demonstration Projects and Pilot Grant Program $355M ($88.75M for FY22, FY23, FY24, and FY25)

○ DOE is directed to fund three energy storage demonstration projects by Sep. 30, 2023 and establish a separate pilot grant program. Geothermal’s potential as a source of seasonal thermal storage makes it well suited to compete for funding under both programs.

● Long Duration Demonstration Initiative and Joint Program $150M ($37.5M for FY22, FY23, FY24, and FY25)

○ This is a joint program between DOE and the U.S. Department of Defense (DoD) to demonstrate long-duration storage technologies at DoD facilities and installations. DOE should ensure effective coordination with the Navy Geothermal Program Office, which is DoD’s lead agency for geothermal development.5

● Industrial Emission Demonstration Projects $500M ($100M for FY22 and FY23, $150M for FY24 and FY25)

○ This program is focused on demonstrating diverse technologies for reducing emissions in the industrial sector. Geothermal has significant potential as a source of clean heat to drive deep decarbonization of hard-to-abate heavy industrial sectors.

● Clean Energy Demonstration Program on Current and Former Mine Land $500M ($100M for FY22, FY23, FY24, FY25 and FY26)

○ Under this program, DOE is directed to fund not more than five clean energy demonstration projects on current and former mine land. Geothermal is explicitly included in the definition of “clean energy project” along with several other technologies.

● Energy Improvements in Rural And Remote Areas $1B ($200M for each FY22, FY23, FY24, FY25, and FY26)

○ The IIJA appropriates $1B over five years for OCED to support “energy improvements in rural and remote areas,” which can include generation resources, microgrids, and grid modernization, among others. Given geothermal’s significant production potential in rural and remote areas, the geothermal industry is well positioned to contribute to the program.

● Program Upgrading Our Electric Grid and Ensuring Reliability and Resiliency $5B ($1B for FY22, FY23, FY24, FY25, and FY26)

○ Under this program, DOE is directed to collaborate with the electric utility sector to demonstrate innovative grid reliability and resilience technologies. Given its capabilities as a firm and flexible resource, geothermal can play a key role.

The IIJA demonstration programs provide an unprecedented opportunity for geothermal. The $84M EGS Demonstration Program is an important foundation to de-risk and scale geothermal projects, while several programs under DOE’s OCED offer geothermal the opportunity to demonstrate its cross-cutting capabilities in energy storage, industrial decarbonization, rural development, and grid reliability. By prioritizing the above recommendations, DOE can help geothermal reach its full potential while maximizing the benefits of its IIJA demonstration programs.