TY - JOUR
T1 - Performance analysis and optimization of an adiabatic compressed air energy storage system coupled with the packed-bed thermal energy storage device
AU - Fan, Chang Hao
AU - Li, Ming Jia
AU - Li, Meng Jie
AU - Chen, Lai Jun
AU - Liu, Zhan Bin
N1 - Publisher Copyright:
© 2025
PY - 2025/6/1
Y1 - 2025/6/1
N2 - In the adiabatic compressed air energy storage (A-CAES) system incorporating the packed-bed thermal energy storage device with encapsulated phase change material (PBTES), the thermocline characteristics of the PBTES device has significant impacts on the overall performance of the A-CAES system. In this work, an A-CAES system and its dynamic model are established taking the thermocline characteristics of the PBTES device into account. Next, the dynamic performance of the A-CAES system with a non-cascaded PBTES device is analyzed and compared to the system with a double-tank thermal energy storage (DTTES) device, elucidating the impacts of the PBTES device on the A-CAES system performance. Finally, in order to enhance the comprehensive performance of the A-CAES system, a two-cascaded PBTES device is introduced, and the melting temperature of the phase change material (PCM) is optimized to achieve the optimal A-CAES system round-trip efficiency. The results indicate that by implementing the two-cascaded PBTES device and optimizing the PCM melting temperature, the heat storage density of the device is increased by about 110.2 % compared with the DTTES device, and the round-trip efficiency of the A-CAES system is increased by 4.4 percentage points compared to the unoptimized system, achieving both high energy utilization efficiency and compactness.
AB - In the adiabatic compressed air energy storage (A-CAES) system incorporating the packed-bed thermal energy storage device with encapsulated phase change material (PBTES), the thermocline characteristics of the PBTES device has significant impacts on the overall performance of the A-CAES system. In this work, an A-CAES system and its dynamic model are established taking the thermocline characteristics of the PBTES device into account. Next, the dynamic performance of the A-CAES system with a non-cascaded PBTES device is analyzed and compared to the system with a double-tank thermal energy storage (DTTES) device, elucidating the impacts of the PBTES device on the A-CAES system performance. Finally, in order to enhance the comprehensive performance of the A-CAES system, a two-cascaded PBTES device is introduced, and the melting temperature of the phase change material (PCM) is optimized to achieve the optimal A-CAES system round-trip efficiency. The results indicate that by implementing the two-cascaded PBTES device and optimizing the PCM melting temperature, the heat storage density of the device is increased by about 110.2 % compared with the DTTES device, and the round-trip efficiency of the A-CAES system is increased by 4.4 percentage points compared to the unoptimized system, achieving both high energy utilization efficiency and compactness.
KW - Adiabatic compressed air energy storage
KW - Packed-bed thermal energy storage
KW - Phase change material
KW - Thermocline characteristics
UR - http://www.scopus.com/inward/record.url?scp=105002254947&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2025.135939
DO - 10.1016/j.energy.2025.135939
M3 - Article
AN - SCOPUS:105002254947
SN - 0360-5442
VL - 324
JO - Energy
JF - Energy
M1 - 135939
ER -
