Dynamic Simulation of an Oxygen-Hydrogen Combustion Turbine System Using Modelica

Abstract

Introducing hydrogen power generation in the power industry may contribute to achieve carbon neutrality by 2050. Hydrogen mixed-fuel gas turbines are available, and pure hydrogen-fueled gas turbines are being developed. Meanwhile, power generation systems based on oxygen–hydrogen combustion turbines have been devised. Such system uses hydrogen as fuel and oxygen as oxidizer, yielding only water vapor as the byproduct of combustion. In addition, as the system performs a semi-closed cycle involving the Brayton and Rankine cycles, high efficient zero-emission power generation is expected with higher thermal efficiency than that of the combined cycle in conventional gas turbines. Basic technologies for oxygen-hydrogen combustion turbines in power generation systems are being developed in Japan as part of the research and development at NEDO for hydrogen utilization. In this study, a dynamic model of the entire system for a 1400 °C-class rationalization system was constructed using a Modelica-based tool developed by the Central Research Institute of Electric Power Industry, Japan. The dynamic behavior considering preliminary load following control was then characterized based on simulation results.

Note: A second version of this paper was uploaded on 2022-11-25. A rebuttal to the reviewer was accidentally included in the first version and has been removed in the second version. Since this was never intended to be included and irrelevant to the article, the original version has been removed.