Abstract In this work, an original oxy-fuel combustion natural gas power plant with two-stage power generation subsystems is proposed to realize the high-efficiency power generation with low-cost carbon capture. H2O and CO2 derived from flue gas is used as diluent to moderate the high temperature in oxy-fuel system. N2 Brayton cycle as the primary subsystem is utilized to generate electricity from GT exhaust heat. Organic Rankine cycle and transcritical CO2 cycle is used as the secondary subsystem for the low-grade power generation. Accordingly, organic Rankine cycle system and transcritical CO2 cycle system are established and simulated. The cryogenic LNG provides cold energy for the two-stage power generation subsystems and CO2 capture to reduce the power consumption of compression. The numerical results show that when 94.8 % of CO2 with 97.2 % purity is captured, the power consumption of carbon capture is approximately 0.57 kWh/kg-CO 2 and 0.07 kWh/kg-CO 2 in O2/CO2 and O2/H2O combustion atmosphere. Transcritical CO2 cycle is revealed to be more efficient for the utilization of flue gas waste heat (including the latent heat of flue gas) than organic Rankine cycle. The net power generation efficiency of transcritical CO2 cycle system is 58.78 % in O2/CO2 atmosphere and 54.87 % in O2/H2O atmosphere.
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Coronavirus Research Articles published between Oct 11, 2021 to Oct 17, 2021
Oct 18, 2021
Articles Included: 3
Muhammad Ikbal and colleagues (2021) reported in ‘Visualisasi dan Analisa Data Penyebaran Covid-19 dengan Metode Klasifikasi Naïve Bayes’ that the cov...Read More
Climate change Research Articles published between Oct 11, 2021 to Oct 17, 2021
Oct 18, 2021
Articles Included: 5
Junjie Jia et al. (2021) reported in ‘Driving mechanisms of gross primary productivity geographical patterns for Qinghai–Tibet Plateau lake systems’ t...Read More