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Volume 13 | Issue 7 | Year 2026 | Article Id. IJME-V13I7P105 | DOI : https://doi.org/10.14445/23488360/IJME-V13I7P105

Modelling and Performance Analysis of a Combined SOFC-GT System with HRSG

Amit Talukdar, Pranjal Sarmah, Partha Protim Borthakur

Received Revised Accepted Published
06 Mar 2026 30 Apr 2026 01 Jul 2026 30 Jul 2026

Citation :

Amit Talukdar, Pranjal Sarmah, Partha Protim Borthakur, "Modelling and Performance Analysis of a Combined SOFC-GT System with HRSG," International Journal of Mechanical Engineering, vol. 13, no. 7, pp. 57-68, 2026. Crossref, https://doi.org/10.14445/23488360/IJME-V13I7P105

Abstract

This paper presents an energy and exergy analysis of a Solid Oxide Fuel Cell (SOFC)-Gas Turbine (GT) configuration integrated with a Heat-Recovery Steam Generator (HRSG) to generate steam for industrial use. The simulation of the hybrid powerplant was performed over a Compression Pressure Ratio (CPR) range of 8-16, with variations in air and fuel supply. The net power output, along with energy and exergy efficiencies, increases with increasing CPR. Without additional fuel supply to the combustion chamber, the total power output of the system is 40.92 MW, with energy and exergy efficiencies are 61.23% and 59.15%, respectively, at CPR 16. The net power output with additional fuel input (50-150 kmol/hr) increases to 50 MW at 150 kmol/hr, at 16 CPR; however, the thermodynamic efficiency decreases owing to increasing Irreversibility. The component-level irreversibility analysis indicates maximum exergy destruction at the SOFC, followed by the CC. The steam generated within the HRSG by utilising the GT exhaust stream increases with additional fuel, reaching 12.27 kg/sec at 16 CPR. The study highlighted the trade-off between efficiency improvement and net power enhancement in the proposed configuration.

Keywords

Solid Oxide Fuel Cell, Gas Turbine, Energy and Exergy Analysis, Hybrid Power System, Compression Pressure Ratio.

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