Clean coal technology is a key way to ensure the energy security and sustainable development of China. Supercritical water gasification of coal is a representative clean coal technology, which can be integrated within thermal power plants. In this study, adapted layouts of power generation system based on supercritical water gasification of coal were proposed to further enhance the system energy efficiency. Models of adapted systems were developed by Aspen Plus, and their performance was simulated. The results showed that the efficient system layout increased the energy efficiency by 8.72%- pts to 48.24% in contrast to its comparison layout. This improvement is mainly due to the 40% decrease of exergy destruction in superheater of the systems through adaption, as well as higher inlet parameters of turbine.
Keywords supercritical water gasification, power generation system, simulation study, performance comparison of systems