Advanced exergy and exergoeconomic analyses to evaluate the economy of LNG oxy-fuel combined cycle power plant

LNG Oxy-Fuel Power and Green Methanol Poly Generation Systems Associated with CO2 Condensation Capture: Techno-Economic Environmental Assessment

“…The oxy-fuel combustion technology is employed in the LNG power plant, which is effective in improving power generation efficiency compared to conventional air combustion, and more importantly, the CO 2 in the flue gas can be captured by condensation. , The energy release process in Figure illustrates the structure of the LNG oxy-fuel power plant, which consists of four main components: the combustor, the gas turbine (GT), the heat recovery steam generator (HRSG), and recompression.…”

“…Machida et al presented an alternative approach using pressure swing phase separation amine solvent for capturing CO 2 and solidifying to storage with LNG cold energy, with an energy consumption of 0.249 GJ/tonne CO 2 . Furthermore, Zhang and Cai et al proposed utilizing the LNG cold energy to directly separate water and CO 2 from the LNG oxy-fuel combustion exhaust gas, thereby effectively addressing the CO 2 capture requirement. , Chan et al proposed to combine the Allam cycle with the LNG regasification process to achieve high electrical efficiency and near-zero CO 2 emissions . However, in the case of stand-alone power plants, the available LNG cold energy is insufficient to fully liquefy the exhaust gas, which was investigated by Yu et al for the optimal trade-off between LNG and exhaust gas compression in an Allam cycle power generation with carbon capture to maximize the utilization of LNG cold energy to liquefy CO 2 .…”

Exergy destruction analysis of a power generation system utilizing the cold energy of LNG

“…Zhang et al [ 14 ] analyzed a combined system with transcritical CO 2 energy storage and ORC using CEA and AEA, which provided more reasonable suggestions for optimizing the system. Cai et al [ 15 ] evaluated the efficiency of an oxy-fuel combustion system utilizing LNG cold energy through CEA and AEA and found that improving the flue gas treatment unit in the combustor positively affected system efficiency. Özen et al [ 16 ] applied CEA and AEA to an LNG cold energy power generation system and found that further optimization of the parabolic solar collector and turbine was worthwhile.…”