Enhanced-Carbon Dioxide (CO2) Plume Geothermal - E-CPG™

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Enhanced-Carbon Dioxide (CO2) Plume Geothermal - E-CPG™

TerraCOH's proprietary technology can tap directly into an exsisting Enhanced Oil Recovery (EOR) site to produce emission-free power helping to convert an enviromentally-negative power producer into a carbon friendly alternative source of energy.

CO2 provides several advantages over water as a geothermal working fluid.

First - CO2 used as a working fluid in the subsurface and in power systems provides higher energy conversion efficiencies than legacy systems.

Second - CO2 power systems are very compact, reducing costs substantially compared to legacy systems. These power systems can be containerized, built off-site at low cost, and moved as needed. Even more, CPG™ systems can reuse existing wells in hydrocarbon fields, decreasing costs and construction time while turning old oil and gas fields into renewable energy resources. geothermal systems.

Third - CO2 mobility (density divided by dynamic viscosity) is significantly greater than that of water. This makes for:
– Greater fluid flow and heat extraction from a reservoir.
– A thermosiphon, which can eliminate subsurface pumping requirements, improving efficiency.

Together, these benefits mean that, lower temperature and less permeable formations than are viable with water can be used, greatly increasing areas where geothermal energy can be economically harnessed.

Fourth - CO2 is a readily available, disposable commodity, which when injected into the subsurface reduces CO2 atmospheric emissions while preserving water resources.

Finally - CPG™ provides a baseload or on-demand renewable electricity source. CPG™ systems can also be designed to provide small or grid-scale energy storage.

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Source: EPA & NATCARB

CO2 Injection Offers Considerable Potential Benefits

The EOR technique that is attracting the most new market interest is CO2-EOR. First tried in 1972 in Scurry County, Texas, CO2 injection has been used successfully throughout the Permian Basin of West Texas and eastern New Mexico, and is now being pursued to a limited extent in Kansas, Mississippi, Wyoming, Oklahoma, Colorado, Utah, Montana, Alaska, and Pennsylvania.

Until recently, most of the CO2 used for EOR has come from naturally-occurring reservoirs. But new technologies are being developed to produce CO2 from industrial applications such as natural gas processing, fertilizer, ethanol, and hydrogen plants in locations where naturally occurring reservoirs are not available. One demonstration at the Dakota Gasification Company's plant in Beulah, North Dakota is producing CO2 and delivering it by a 204-mile pipeline to the Weyburn oil field in Saskatchewan, Canada. Encana, the field's operator, is injecting the CO2 to extend the field's productive life, hoping to add another 25 years and as much as 130 million barrels of oil that might otherwise have been abandoned.

Courtesy of Energy.gov

 

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E-CPG™ Opportunity

Tens of thousands of exsisting and abandoned wells can be found all over the United States giving opportunities to produce emission-free geothermal power without having to drill, greatly lowering the operational cost.

Size does matter!

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Steam -VS- sCO2

Another advantage for using CO2 as a working fluid is the size of the turbine.

Currently the standard Steam turbines used are 20 meters large producing 300 MWe. For the same 300 MWe output a sCO2 turbine is as small as 1 meter in size.

A 20 to 1 ratio!

filler image 40' X 8' X 9'

The size of the whole E-CPG™ unit is housed within a single shipping container. Making the enviromental footprint significantly smaller. As seen in the comparison image between a Legacy Power Plant and E-CPG™ Containers.

 



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All questions are welcome or if you have a location you would like to implement our CPG™ technology.