GreenFire Energy Demonstration, Coso, CA, USA, 2019
Geothermal energy, the world’s largest source of clean, continuous energy, uses on average only 10% of available heat. GreenLoop extracts significantly more power from non-permeable and hotter regions of existing geothermal projects.
GreenFire Energy Solutions
GreenFire Energy develops an innovative closed-loop energy system called GreenFire’s GreenLoop™ and delivers solutions to address geothermal energy challenges. Solutions are tailored based on customer requirements, existing wells, and existing geothermal resources.
- Well Retrofits
- Field Expansion with New Wells
- Greenfield Projects
GreenLoop Technology Benefits
Enable Fast Deployments and Low-Cost Energy
GreenLoop technology leverages existing geothermal wells, resources, and infrastructure which accelerates deployments, lowers costs, lowers risk, and results in high ROI. Existing geothermal wells are restored and then existing fields can be expanded.
Access the Broad Spectrum of Geothermal Resources
GreenLoop technology is adaptable to generate power from a broad spectrum of geothermal resource types, to retrofit, expand, and develop greenfield projects.
Use the Power of Analytic Models
GreenLoop’s Accurate Resource and Project Analytic models assess technoeconomic feasibility and optimizes the energy potential of geothermal resources before large costs are incurred. These analytic models accelerate projects and decrease risk.
Delivers Environmental Sustainability
GreenLoop technology delivers environmental sustainability. It preserves water mass and the pressure in the well and broader resource. There is no fracking required but facilitates hybrid systems. There are no greenhouse gas emissions.
GreenLoop Technology Included in Solutions
- Down Bore Heat Exchanger (DBHX)
- Accurate Resource and Project Analytics
- Configuration tailored to optimize performance and the levelized cost of energy
Down Bore Heat Exchanger (DBHX)
GreenFire Energy’s closed-loop energy system is distinguished by using a Down Bore Heat Exchanger – a tube-in-tube assembly – tailored to the specific resource characteristics. The DBHX is installed in existing, unproductive wells leveraging existing geothermal resources and infrastructure. This significantly reduces project time, cost, and risk, while increasing ROI.
This technology does not require water and can use alternative working fluids including ORC fluids and supercritical CO2. The working fluid is circulated in the DBHX through the tube-in-tube system which extracts heat from the surrounding rock.
Accurate GreenLoop Resource and Project Analytics™
GreenFire Energy develops sophisticated analytics to predict cost and power generation to mitigate risk before high costs are incurred. Models are run using data on the specific geothermal resource and infrastructure as well as data from wells worldwide.
- Project Cost Models (PCM) are used to for technoeconomic feasibility.
- Power Generation Analytics (PGA) to predicts power generation and optimize installation design
Configurations Tailored to Optimize Performance the Levelized Cost of Energy (LCOE)
GreenLoop technology enables a tailored solution using an optimal configuration. This maximizes power generation based on specific customer requirements, geothermal resources, and infrastructure. Here are some of the configurations available.
GreenLoop for Steam and 2-Phase Wells
This proprietary steam and 2-phase well configuration is designed for water- and pressure-constrained wells but is also useful to provide long term sustainability in conventional fields.
This configuration provides long-term sustainability. It brings heat to the surface while preserving pressure and water mass. There is no degradation of the geothermal field.
GreenLoop for Hot Dry Rock
The GreenLoop for Hot Dry Rock configuration uses a coaxial tube-in-tube configuration. A straw loop system can be applied depending on the geothermal resource and the working fluid selected. This configuration is suitable for field expansion, hot dry rock systems, hot liquid or vapor dominated reservoirs, and supercritical reservoirs.
GreenLoop with Coproduction
The GreenLoop with Coproduction configuration uses water or alternative working fluids including ORC fluids and supercritical CO2. It helps to maintain power delivery at contracted requirement and improves return on project infrastructure and transmission. The configuration defers expensive plug and abandonment.
This configuration is suitable for Well Retrofits and produces power from existing, unproductive wells.
GreenLoop for Greenfield Projects
GreenLoop for Greenfield Projects uses a coaxial tube-in-tube configuration with multiple coaxial wells driven from multiple pads. A 80 m bottom hole separation avoids thermal interference. This configuration has a small footprint. Only heat is extracted and no process water is needed. There is only conductive heat transfer but convection will improve performance. This configuration offer low exploration and development risk. The choice of working fluids depends on resource and surface facilities.
Learn more in the Research Papers on closed-loop geothermal energy systems and related topics.