Abstract
In the supercritical CO2 recompression Brayton cycle, recuperators play an important role in cycle efficiency and operating performance. In this work, a dynamic model of the supercritical CO2 recompression Brayton cycle is developed. The effects of high-temperature and low-temperature recuperators on the dynamic characteristics of the cycle are examined. It is found that cycle parameters, including temperature, power, and cycle efficiency, exhibit sinusoidal variations like the source signal provided by the hot-side inlet temperature of recuperator. The transient responses in different locations of the cycle have different amplitudes and phases. The source signal with amplitude of 12.5 K at the hot-side inlet temperature of the high-temperature recuperator causes power variations of 10, 1, and 1.3 kW, respectively, in the turbine, main compressor, and recompressor, while the maximum variance of the cycle efficiency is within 1.57%. When the amplitude at the hot-side inlet temperature of the high-temperature recuperator is changed to 25 K, variances in the cycle efficiencies, powers, and temperatures, respectively, nearly double in the turbine, compressors, and recuperators. When two source signals are added to the cycle, the phase of the cycle efficiency well matches each phase of the two individual source signals.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
