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Off-Design Performances of an Organic Rankine Cycle for Waste Heat Recovery from Gas Turbines

Author

Listed:
  • Carlo Carcasci

    (DIEF—Department of Industrial Engineering, University of Florence Via Santa Marta, 3, 50139 Florence, Italy)

  • Lapo Cheli

    (DIEF—Department of Industrial Engineering, University of Florence Via Santa Marta, 3, 50139 Florence, Italy)

  • Pietro Lubello

    (DIEF—Department of Industrial Engineering, University of Florence Via Santa Marta, 3, 50139 Florence, Italy)

  • Lorenzo Winchler

    (DIEF—Department of Industrial Engineering, University of Florence Via Santa Marta, 3, 50139 Florence, Italy)

Abstract

This paper presents an off-design analysis of a gas turbine Organic Rankine Cycle (ORC) combined cycle. Combustion turbine performances are significantly affected by fluctuations in ambient conditions, leading to relevant variations in the exhaust gases’ mass flow rate and temperature. The effects of the variation of ambient air temperature have been considered in the simulation of the topper cycle and of the condenser in the bottomer one. Analyses have been performed for different working fluids (toluene, benzene and cyclopentane) and control systems have been introduced on critical parameters, such as oil temperature and air mass flow rate at the condenser fan. Results have highlighted similar power outputs for cycles based on benzene and toluene, while differences as high as 34% have been found for cyclopentane. The power output trend with ambient temperature has been found to be influenced by slope discontinuities in gas turbine exhaust mass flow rate and temperature and by the upper limit imposed on the air mass flow rate at the condenser as well, suggesting the importance of a correct sizing of the component in the design phase. Overall, benzene-based cycle power output has been found to vary between 4518 kW and 3346 kW in the ambient air temperature range considered.

Suggested Citation

  • Carlo Carcasci & Lapo Cheli & Pietro Lubello & Lorenzo Winchler, 2020. "Off-Design Performances of an Organic Rankine Cycle for Waste Heat Recovery from Gas Turbines," Energies, MDPI, vol. 13(5), pages 1-15, March.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1105-:d:327299
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    References listed on IDEAS

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    Cited by:

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    2. Zinsalo, Joël M. & Lamarche, Louis & Raymond, Jasmin, 2022. "Performance analysis and working fluid selection of an Organic Rankine Cycle Power Plant coupled to an Enhanced Geothermal System," Energy, Elsevier, vol. 245(C).
    3. Fabio Fatigati & Marco Di Bartolomeo & Davide Di Battista & Roberto Cipollone, 2020. "Experimental Validation of a New Modeling for the Design Optimization of a Sliding Vane Rotary Expander Operating in an ORC-Based Power Unit," Energies, MDPI, vol. 13(16), pages 1-23, August.
    4. Ryszard Bartnik & Zbigniew Buryn & Anna Hnydiuk-Stefan & Marcin Szega & Tomasz Popławski, 2020. "Power and Frequency Control in the National Power System of the 370 MW Coal Fired Unit Superstructured with a Gas Turbine," Energies, MDPI, vol. 13(10), pages 1-35, May.
    5. Vladimir Kindra & Igor Maksimov & Ivan Komarov & Cheng Xu & Tuantuan Xin, 2023. "Feasibility Study of Scheme and Regenerator Parameters for Trinary Power Cycles," Energies, MDPI, vol. 16(9), pages 1-25, May.

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