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Thermodynamic Optimization of New Combined Gas/Steam Power Cycles with HRSG and Heat Exchanger

  • Research Article - Mechanical Engineering
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Abstract

In this study, energy and exergy analyses for four configurations, simple gas turbine, steam bottoming cycle with heat recovery steam generator, heat exchanger and secondary bottoming cycle, are performed. The waste heat from the turbine exhaust is utilized in order to optimize the efficiency and output of a simple gas turbine cycle. The combined cycle efficiencies and exergy destruction for each configuration have been analyzed parametrically by using first and second laws of thermodynamics. The effects of the pressure ratio and turbine inlet temperatures on the specific fuel consumption, net output power, energy and exergy efficiencies and the exergy destruction of the plant are investigated in this study. It is demonstrated that the maximum output of the plant increases up to 32.1% when TIT \(=\) 1500 K and up to 19.3% when TIT \(=\) 2000 K as we go from conventional gas turbine cycle to SBC with HRSG, HX and secondary bottoming cycles.

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Authors and Affiliations

  1. Department of Mechanical and Industrial Engineering, College of Engineering, Majmaah University, Majmaah, 11952, Kingdom of Saudi Arabia

    M. N. Khan, I. Tlili & W. A. Khan

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  1. M. N. Khan
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  2. I. Tlili
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  3. W. A. Khan
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Correspondence to W. A. Khan.

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Khan, M.N., Tlili, I. & Khan, W.A. Thermodynamic Optimization of New Combined Gas/Steam Power Cycles with HRSG and Heat Exchanger. Arab J Sci Eng 42, 4547–4558 (2017). https://doi.org/10.1007/s13369-017-2549-4

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  • DOI: https://doi.org/10.1007/s13369-017-2549-4

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