Absorption/Desorption Based High Efficiency Supercritical Carbon Dioxide Power Cycles Email Page
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Performer:  Southwest Research Institute (SwRI) Location:  San Antonio, Texas
Project Duration:  10/01/2015 – 06/30/2018 Award Number:  FE0025348
Technology Area:  Advanced Combustion Systems Total Award Value:  $1,125,000
Key Technology:  Enabling Technologies/Innovative Concepts DOE Share:  $900,000
Performer Share:  $225,000

Condensation Cycle with<br/>Absorption/Desorption Circuit
Condensation Cycle with
Absorption/Desorption Circuit

Project Description

The team of Southwest Research Institute® (SwRI®) and Thar Energy LLC (Thar) will evaluate indirect fossil based supercritical carbon dioxide (SCO2) power plants via system engineering design and thermodynamic analysis of integrated power plants. This evaluation will be used to assess the impact of thermal integration on plant performance and identify current technology gaps when integrating fossil based thermal systems with SCO2 power blocks. This will extend our current understanding of how fossil based thermal systems may best be integrated with recuperated closed Brayton cycles and identify component and boiler technology requirements and integration issues for future development and risk reduction. The project team will also evaluate a novel absorption/desorption based SCO2 power cycle that utilizes an absorption/desorption circuit to minimize compression work. Physical properties testing of suitable binary fluid mixtures at pressures and temperatures of interest for SCO2 power cycles will facilitate the system engineering design and thermodynamic analysis of the SCO2 absorption/desorption cycle. This work builds on DOE contracts FE0024104 and FE0024012 to advance fossil based utility scale SCO2 power plants by addressing integrated SCO2 plant efficiency, cost, and operating characteristics.

Project Benefits

This SwRI team effort will advance indirect fossil-fired utility-scale SCO2 plants by addressing challenges facing the tight integration of the secondary and thermal systems with the SCO2 power block. The effort will extend our knowledge of CO2+absorbent mixtures to pressures and temperatures of interest for SCO2 power cycles, and evaluate a novel SCO2 cycle that could increase thermal efficiencies by an additional 5 to 10 percentage points as compared to a baseline SCO2 cycle through reduced compression work. Efficiency and cost data from DOE’s Cost and Performance Baseline for Fossil Energy Plants showed that an increase in efficiency of 5 to 10 percentage points represents a savings (in fuel costs alone) of 0.0012 to 0.0023 $/kilowatt hour (kWh) as compared to a baseline SCO2 cycle and 0.0028 to 0.0039 $/kWh as compared to a baseline coal-fired supercritical steam plant.

Presentations, Papers, and Publications

Contact Information

Federal Project Manager Seth Lawson: seth.lawson@netl.doe.gov
Technology Manager John Rockey: john.rockey@netl.doe.gov
Principal Investigator Aaron McClung: aaron.mcclung@swri.org