Qualitative–quantitative comparative assessment of conventional gas turbine with fuel cell-based integrated power cycle

Abhinav Anand Sinha, Tushar Choudhary (), Mohd. Zahid Ansari and Anoop Kumar Shukla
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Abhinav Anand Sinha: PDPM Indian Institute of Information and Technology Design and Manufacturing
Tushar Choudhary: PDPM Indian Institute of Information and Technology Design and Manufacturing
Mohd. Zahid Ansari: PDPM Indian Institute of Information and Technology Design and Manufacturing
Anoop Kumar Shukla: Amity University, Uttar Pradesh

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2025, vol. 27, issue 3, No 67, 7347-7377

Abstract: Abstract A conventional gas turbine has potential to generate power but suffers from significant losses in the form of exhaust. The system’s efficiency can be improved by incorporating the recuperator into the cycle, which is known as recuperated gas turbine, but only to a certain extent. Through hybridization, there are more options for improving performance. To do this, a high-temperature fuel cell known as a “solid oxide fuel cell” is combined with the traditional system to create a hybrid that offers significant improvements in both quantitative and qualitative performance. First law of thermodynamics gives the quantitative results, whereas second law of thermodynamics gives a qualitative result. This paper presents the qualitative and quantitative comparison between hybrid and non-hybrid configuration. The parametric analysis for fuel cell is shown by considering Knudsen and molecular diffusion coefficient, along with the detailed discussion of conventional system and hybrid system. Performance of hybrid system is validated with the published results. Through hybridization more than 20% efficiency is improved in recuperated gas turbine when fuel cell is installed with it. The hybrid system achieves efficiency of energy and exergy efficiency of 61.46% and 59.9%, respectively, at pressure ratio 4 and turbine inlet temperature 1250 K. A unique performance map also presented for the proposed configuration and compared the nature of the curve. Graphical abstract

Keywords: Energy–exergy analysis; Gas turbine; Hybrid system; SOFC–GT (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s10668-023-04196-8

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