Development of Low-Leakage Shaft End Seals for Utility-Scale Supercritical Carbon Dioxide (SC02) Turbo Expanders Email Page
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Performer:  General Electric (GE) Company Location:  Niskayuna, New York
Project Duration:  10/01/2014 – 08/31/2019 Award Number:  FE0024007
Technology Area:  Advanced Turbines Total Award Value:  $8,617,402
Key Technology:  Turbo-machinery for Supercritical CO2 Power Cycles DOE Share:  $6,824,098
Performer Share:  $1,793,304

GE dry gas seal concept for utility<br/>scale SCO<sub>2</sub> turbo expanders
GE dry gas seal concept for utility
scale SCO2 turbo expanders

Project Description

General Electric Company (GE), in partnership with Southwest Research Institute (SwRI), will develop expander shaft end seals for utility-scale supercritical CO2 (SCO2) power cycles. Phase I includes a conceptual design of a utility-scale end seal capable of meeting the component-level and system-level objectives. GE and SwRI will perform thermodynamic optimization and turbomachinery preliminary design to arrive at a conceptual layout for a utility-scale SCO2 power plant. GE will then develop face seals as a solution to the end shaft sealing needed for SCO2 turbo expanders. Finally, a conceptual design of a dedicated SCO2 facility at SwRI will be developed with sufficient fidelity to enable generation of a detailed Phase II cost and schedule proposal.

Project Benefits

The results of this research are intended to enable the DOE transformational goal of $10/metric ton carbon capture by 2035, utilizing indirect coal-fired SCO2 power cycles with thermodynamic cycle efficiencies of 50-52 percent or greater. Additional benefits include reduced water consumption (no evaporator blow-down), reduced power block size (smaller turbomachinery and condenser due to the higher density working fluid), and better thermodynamic integration with post-combustion CO2 capture and compression equipment.

Presentations, Papers, and Publications

Contact Information

Federal Project Manager Seth Lawson: seth.lawson@netl.doe.gov
Technology Manager Richard Dennis: richard.dennis@netl.doe.gov
Principal Investigator Rahul Bidkar: bidkar@ge.com