THERMODYNAMIC ASSESSMENT OF A HYBRID SOFC/GT CYCLE CONSIDERING OXY-ANODE COMBUSTION CO2 CAPTURE TECHNOLOGY

Integrating new power generation technologies with environmental considerations lead improving performance and
developing high efficient systems that is contributed to minimizing emissions. To achieve this goal, in this research,
an energy & exergy analysis is introduced as a preliminary step for a hybrid SOFC/GT base power plant with CO2
capture and waste heat recovery system. The proposed combined cycle includes an internal reforming tubular SOFC
fed with methane, likewise a CO2 capture system based on oxy-anode combustion and HRSG is added to provide
saturated steam. For the mentioned subsidiaries, considering total site efficiency improvement enables application
capacity of a green attractive low CO2 emission plant, if it pays enough in attention about a bit miss in efficiency,
regarding CO2 capture. With the application of open source code software based on a steady state process, a zero
dimensional model is developed and the thermodynamic properties of the most significant streams of the plant are
also proposed. To achieve this goal, the energy & exergy streams’ specifications are performed for all involved
components. Additionally, the highest proportion of irreversibility is identified and prioritized. Meanwhile the
designated model is validated with the similar conditions reported in the literature. For bench marking purposes, a
complementary parametric study is also performed to show the effects of important variations & values on system
operation characteristics. The final results identify for CO2 capture purpose, the loss opportunity for 516.84 MWh
per year electricity productions against with 5342.20 tCO2 gain annually. The result of quantitative analysis also
explains specific CO2 production in this cycle is 310.98 g kWh-1 that shows considerable gains compare with other
references. Final conclusions demonstrate that the proposed systems have enough capability to be applied within
industries instead of conventional low efficiency and highly pollutant systems currently marked at the market.