Comprehensive Thermodynamic Evaluation of the Natural Gas-Fired Allam Cycle at Full Load

In this study, thermodynamic modeling and simulations were used to optimize the design point performance of Allam cycle. The topic fits perfectly with strategies for power sector decarbonization toward net zero emission. fact, it offers an environmentally friendlier alternative natural gas combined cycle (NGCC) plants. focus is on oxyfuel combustion that, supercritical CO2 (sCO2) stream as working fluid, produces high-purity CO2, electricity, water by means a highly recuperated Brayton former ready sequestration, pipeline injection, or other applications, such enhanced oil recovery industrial processes. Being designed within last decade, large-scale plants are poorly documented in published literature not yet operation. Accordingly, model was developed (Pn) output 300 MW. After validation against little data available from academic studies, simulation sets conceived assess impact main process parameters efficiency. To that end, operating conditions compressor, turbine, air separation unit (ASU) varied parametric analysis, preparatory optimization. For chosen layout, maximum electric efficiency (ηel,n) found be 50.4%, without thermal ASU.