Study on the Thermo-economic Performance of a Integrated Energy System Based on Hydrogen-fueled Gas Turbine

In order to achieve low-carbon and high-efficiency operation of natural gas stations driven by hydrogen, a novel integrated energy system is proposed in this paper. The steam cycle is used to recover the waste heat generated by gas turbines. The electrical energy is used to drive the solid oxide electrolysis hydrogen production system to produce hydrogen, and then the mixture of methane and hydrogen is used as the fuel of gas turbine, and the compressed air energy storage technology is used to convert renewable energy into stable electrical energy output. The calculation results indicate that under design conditions, the energy efficiency, exergy efficiency and levelized cost of energy are 85.66%, 41.37% and 294.70 Yuan·(MW·h)–1, respectively. Parameter sensitivity analysis shows that the operating parameters of gas turbine pressure ratio, gas turbine hydrogen blending ratio, steam cycle low-pressure boiler pressure, steam cycle extraction coefficient, compressed air energy storage technology energy release power have significant impact on system thermodynamic performance, while the operating parameters of gas turbine pressure ratio, gas turbine hydrogen blending ratio, and steam cycle extraction coefficient have significant impact on system economic performance.The multi-objective optimization results indicate that the optimal exergy efficiency and standardized unit energy cost of the system are 42.31% and 284.33 Yuan·(MW·h)–1, respectively.