Simulation analysis of compressed carbon dioxide energy storage system based on EBSILON
ZHAO Da-zhou
ZHANG Zhong-ping
WANG Shu-jun
GAO Xiang
LIU Heng
Abstract：A two-stage compression and two-stage expansion CO2 energy storage system model of 100 MW/1 000 MWh was established based on EBSILON software.The study investigated the impact of working fluid flow rate and the inlet temperatures of the expansion and compression turbines on the system efficiency.The results showed that the relative deviation of the generated power from the design value for the energy storage system model was 1.72%,and the power-to-electrical efficiency was 65.61%.The generated power was positively correlated with the working fluid flow rate,and with a 5%annual working fluid leakage,the generated power would decrease by 3.15%.For every 2℃increase in the inlet temperature of the first-stage expansion turbine,the generated power increased by 0.47 MW.With every 5℃increase in the inlet temperature of the first-stage compression turbine,the average compression power consumption decreased by 1.63 MW.Under the assumption of an internal rate of return on capital of 8%,when the project serves as a user-side energy storage system,the peak-valley electricity price difference needs to reach 1.46 yuan/kWh.
Keywords：EBSILONcarbon dioxide energy storagegenerated power
Publication Date：2023-12-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 84-86 )