TY - JOUR
T1 - Performance analysis and multi-objective optimization of a combined system of Brayton cycle and compression energy storage based on supercritical carbon dioxide
AU - Lu, Mengqi
AU - Du, Yadong
AU - Yang, Ce
AU - Zhang, Zhiqiang
AU - Wang, Haimei
AU - Sun, Shijun
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2024/1/15
Y1 - 2024/1/15
N2 - The energy storage system plays a pivotal role in optimizing the power grid's peak mobilization. In this study, we propose a combined cycle of supercritical carbon dioxide (sCO2) recompression cycle (sCO2-RC) coupled with compressed sCO2 energy storage (S-CCES) system. Two distinct layouts are thoroughly investigated, each corresponding to different auxiliary heat source locations: utilizing waste heat to heat hot water of S-CCES (SCW-CCES) and heat CO2 of S-CCES (SCC-CCES). Through comprehensive thermodynamic modeling and analysis, we evaluate the performance of both layouts and conduct multi-objective optimization using a genetic algorithm. The results indicate that, under identical design conditions, the heat input leads to a respective increase of 4.25 MW and 7.02 MW in the output power of S-CCES for the SCW-CCES and SCC-CCES layouts. Furthermore, parametric analysis reveals that the performance of SCC-CCES surpasses that of SCW-CCES when considering performance indicators other than round-trip efficiency (RTE). The results obtained from multi-objective optimization demonstrate that the optimal solution for SCW-CCES achieves a higher RTE of 25.94 %, while the optimal solution for SCC-CCES exhibits a superior levelized cost of electricity and exergy efficiency, amounting to 68.94 $/MWh and 58.76 %, respectively.
AB - The energy storage system plays a pivotal role in optimizing the power grid's peak mobilization. In this study, we propose a combined cycle of supercritical carbon dioxide (sCO2) recompression cycle (sCO2-RC) coupled with compressed sCO2 energy storage (S-CCES) system. Two distinct layouts are thoroughly investigated, each corresponding to different auxiliary heat source locations: utilizing waste heat to heat hot water of S-CCES (SCW-CCES) and heat CO2 of S-CCES (SCC-CCES). Through comprehensive thermodynamic modeling and analysis, we evaluate the performance of both layouts and conduct multi-objective optimization using a genetic algorithm. The results indicate that, under identical design conditions, the heat input leads to a respective increase of 4.25 MW and 7.02 MW in the output power of S-CCES for the SCW-CCES and SCC-CCES layouts. Furthermore, parametric analysis reveals that the performance of SCC-CCES surpasses that of SCW-CCES when considering performance indicators other than round-trip efficiency (RTE). The results obtained from multi-objective optimization demonstrate that the optimal solution for SCW-CCES achieves a higher RTE of 25.94 %, while the optimal solution for SCC-CCES exhibits a superior levelized cost of electricity and exergy efficiency, amounting to 68.94 $/MWh and 58.76 %, respectively.
KW - Compressed supercritical carbon dioxide energy storage system
KW - Multi-objective optimization
KW - Performance analysis
KW - Supercritical carbon dioxide recompression cycle
KW - Two layouts
UR - http://www.scopus.com/inward/record.url?scp=85176961584&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2023.121837
DO - 10.1016/j.applthermaleng.2023.121837
M3 - Article
AN - SCOPUS:85176961584
SN - 1359-4311
VL - 236
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 121837
ER -