July 2021, Vol. 248, No. 7

Features

STEP Advances Supercritical CO2 Power Cycles for Gas-Fired Generation

By Timothy C. Allison, Ph.D, Southwest Research Institute, San Antonio, Texas   Power cycles using supercritical carbon dioxide as a working fluid show promise for many power generation applications, including high-efficiency waste heat recovery on pipeline gas turbines.   Component development efforts for commercializing these power cycles have progressed rapidly in recent years and the technology is poised for demonstration at the 10 MWe-scale at the Supercritical Transformational Electric Power (STEP) pilot plant that is nearing completion. These power cycles show promise to improve the cost, efficiency, and responsiveness of power generation.  Supercritical Carbon Dioxide (sCO2) power

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