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.

  • Energy Suppliers

    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

    Transmission System Operators

    Grid balancing & stability
    Long-duration backup (hours/days)

  • Geothermal Operators

    Geothermal Operators

    Converting underperforming or failed hydrothermal/EGS wells if brine flow rates or temperatures not achieved

  • Ground PV

    Ground PV

    Variable arbitrage
    Energy increase with Battery+
    Short or long duration storage
    Seasonal storage
    Convert to baseload power plant

  • Wind Farms

    Wind Farms

    Variable arbitrage
    Energy increase with Battery+
    Short or long duration storage
    Seasonal storage
    Convert to baseload power plant

  • Oil & Gas Operators

    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?

  • Open Loop EGS

    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

    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

    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.