TerraThermo™
ZeroGeo is delivering renewable energy storage and low-carbon baseload power generation in Europe by deploying Hot Dry Rock (“HDR”) technologies.
Joint Venture with Sage Geosystems
The TerraThermo™ joint venture between ZeroGeo and Sage Geosystems Inc will utilize Sage’s EarthStore™ and Battery+™ technologies to develop renewable energy storage and baseload power generation projects in Europe.
Scalable from storage to baseload power generation
HDR technologies can benefit a wide range of power storage and generation systems.
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Energy Suppliers
Baseload grid support
Variable arbitrage
Energy increase with Battery+
Power storage for later use
Seasonal storage
Conversion of coal and thermal plants -
Transmission System Operators
Grid balancing & stability
Long-duration backup (hours/days) -
Geothermal Operators
Converting underperforming or failed hydrothermal/EGS wells if brine flow rates or temperatures not achieved
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Ground PV
Variable arbitrage
Energy increase with Battery+
Short or long duration storage
Seasonal storage
Convert to baseload power plant -
Wind Farms
Variable arbitrage
Energy increase with Battery+
Short or long duration storage
Seasonal storage
Convert to baseload power plant -
Oil & Gas Operators
Repurpose end-of-life wells to storage
Delay abandonment
Decarbonise power supply for operations
How are HDR technologies different to other next generation geothermal technologies?
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Open Loop EGS
Fracturing creates an artificial reservoir
Multiple wells: higher CAPEX/MW
- Fractures must connect across multiple wells
- Requires continuous injection of large volumes of water at high pressure (10’000 to 15’000 PSI)
- Fluid must disperse evenly across fractures to avoid short circuiting into a single flow channel
- Huge parasitic loads from friction pressures -
Sage Geosystems EGS
HeatRoot™ & HeatCycle™
Single well: less CAPEX/MW
- Off-the-shelf oil & gas drilling technology
- Gravity fractures are additive, do not connect across wells
- Injection pressures < 5’000 PSI
- Fluid dispersion is not material to design
- Scalable from storage (<150°C) to baseload power (>150°C)
- Gravity fracture is operated above fracture opening pressure, so parasitic loads from friction are greatly reduced compared to open loop EGS -
Closed Loop AGS
Boreholes form a “radiator” shape underground
Single & multiple wells: requires tens of km of well length for sufficient surface area for heat transfer
- New technology is needed for complex directional drilling and well completions
- No connectivity with surrounding rock, conduction heating only
- Lower power output per well than EGS
Benefits
EarthStore™ Geology-independent, short or long duration mechanical pressure storage with round-trip efficiencies 70-75% and power generation capacity of 3.0MW net per well.
Battery+™ Geology-dependent power generation with round-trip efficiencies up to 200% and capacity of >3.0MW net per well.
Battery+™ provides potential to 2x energy produced through geothermal heating of injected water.
Co-location
We can offer co-location of renewables power generation to convert existing Ground PV, Onshore Wind and Thermal into integrated and scalable baseload renewable power generation plants.
Sustainable & Secure
We offer storage and power production technologies that are more sustainable and raw material-secure than any other storage or renewable power generation system.
Our energy storage does not rely on critical materials necessary for other renewable storage and energy generation systems.