Supercritical CO2 Brayton Cycle Design and System Start-Up Options

by Kevin M. Eisemann & Robert L. Fuller
Barber-Nichols Inc.

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Barber-Nichols, Inc (BNI) was contracted by Sandia National Laboratory (SNL) to design and fabricate a supercritical CO2 (SCO2) Brayton Cycle loop and supporting turbomachinery for the purpose of electrical power generation. BNI successfully designed, manufactured, and operated this hardware to create a proven means of power generation. Operation of the SCO2 loop highlighted a variety of technical challenges during the startup sequence. Hardware manipulation to the loop and methods of loop “priming” were developed to assist in general startup. Key design features and start-up operational tactics are presented.