Project Objectives

STEP Demo will advance the technology readiness level (TRL) of the sCO2 cycle level from TRL 3 to TRL 7 through a staged risk-reduction approach.

Specific Project Goals

  • Demonstrate the operability of the indirect sCO2 power cycle
  • Verify the performance of components (turbomachinery, recuperators, compressors, etc.)
  • Show the potential for producing a lower cost of electricity and the potential for a thermodynamic cycle efficiency greater than 50% at commercial scales.
  • Demonstrate at least a 700°C turbine inlet temperature and a Recompression Closed Brayton Cycle (RCBC) configuration that demonstrates system and component design and performance, including generating at least 10 MWe
  • A simple cycle configuration with a 500°C turbine inlet temperature will also be tested to provide information for waste heat applications
  • Reconfigurable facility to accommodate future testing
    • System/cycle upgrades
    • New cycle configurations (i.e., cascade cycles, directly fired cycles, etc.)
    • New or upgraded components (turbomachinery, recuperators and heat exchangers)

Become a project partner

This open project is welcoming new partners from around the world. OEMs, engineering companies, and power plant owner/operators are invited to join to gain a better understanding of how sCO2 technology can improve high-efficiency power generation.


For more information, contact Markus Lesemann directly or call 818.405.9564