TY - JOUR
T1 - Thermodynamic analytical solution and exergy analysis for supercritical compressed air energy storage system
AU - Guo, Huan
AU - Xu, Yujie
AU - Chen, Haisheng
AU - Guo, Cong
AU - Qin, Wei
N1 - Publisher Copyright:
© 2017
PY - 2017
Y1 - 2017
N2 - An analytical solution for a novel Compressed Air Energy Storage (CAES) system, Supercritical Compressed Air Energy Storage (SC-CAES) system, was conducted in this paper. The analytical solution can explore the evolution and its reason of roundtrip efficiency varying with system key parameters in depth, while it can also reveal the coupling mechanism of different sections of the system. On that basis, the model of exergy destruction for each part was obtained, and the exergy destruction can be easily calculated. Furthermore, the analytical solution has the character of universality due to the deduced method of sectional treatment, hence it can be extended to other similar CAES systems. Lastly, a sensitivity analysis and an exergy analysis were conducted for SC-CAES system. It is found and proved that the system efficiency varies linearly with isentropic efficiencies of compressor and expander, temperature difference of intercooler and reheater, pressure loss of intercooler and reheater. Meanwhile, the main factors of the varying tendency of total exergy destruction with different parameters are revealed.
AB - An analytical solution for a novel Compressed Air Energy Storage (CAES) system, Supercritical Compressed Air Energy Storage (SC-CAES) system, was conducted in this paper. The analytical solution can explore the evolution and its reason of roundtrip efficiency varying with system key parameters in depth, while it can also reveal the coupling mechanism of different sections of the system. On that basis, the model of exergy destruction for each part was obtained, and the exergy destruction can be easily calculated. Furthermore, the analytical solution has the character of universality due to the deduced method of sectional treatment, hence it can be extended to other similar CAES systems. Lastly, a sensitivity analysis and an exergy analysis were conducted for SC-CAES system. It is found and proved that the system efficiency varies linearly with isentropic efficiencies of compressor and expander, temperature difference of intercooler and reheater, pressure loss of intercooler and reheater. Meanwhile, the main factors of the varying tendency of total exergy destruction with different parameters are revealed.
KW - Analytical solution
KW - Exergy analysis
KW - Sensitivity analysis
KW - Supercritical Compressed Air Energy Storage (SC-CAES)
UR - http://www.scopus.com/inward/record.url?scp=85018758482&partnerID=8YFLogxK
U2 - 10.1016/j.apenergy.2017.04.068
DO - 10.1016/j.apenergy.2017.04.068
M3 - Article
AN - SCOPUS:85018758482
SN - 0306-2619
VL - 199
SP - 96
EP - 106
JO - Applied Energy
JF - Applied Energy
ER -
