Abstract
To investigate the behavior of the round-trip efficiency of transcritical-CO2-cycle-based TEES (thermo-electric energy storage) according to the changes in the temperature of the low-temperature hot storage tank, the charging and discharging processes were optimized at various temperature conditions of the tank. In contrast to previous studies, to achieve a more realistic simulation, heat exchangers of identical shape and size were shared by charging and discharging processes, and the characteristics of the working fluid's heat transfer and pressure drop were considered. Based on this study, it was confirmed that an optimal temperature exists in the low-temperature hot storage tank for maximizing the round-trip efficiency. The reason for this existence was discussed. Furthermore, it was found that a common design approach—using all the stored heat as a heat source during discharging—does not always yield optimal results from the viewpoint of round-trip efficiency.
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.
