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Effect of Inlet Air Heating on Gas Turbine Efficiency under Partial Load

Author

Listed:
  • ZhiTan Liu

    (Guodian Science and Technology Research Institute, Nanjing 210023, China)

  • XiaoDong Ren

    (Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

  • ZhiYuan Yan

    (Guodian Science and Technology Research Institute, Nanjing 210023, China)

  • HongFei Zhu

    (Guodian Science and Technology Research Institute, Nanjing 210023, China)

  • Tao Zhang

    (Guodian Science and Technology Research Institute, Nanjing 210023, China)

  • Wei Zhu

    (Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

  • XueSong Li

    (Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

Abstract

A novel heating technology is presented to analyze the influence of inlet air heating on gas turbine efficiency under partial load. This technology uses the waste heat of a low-temperature heat sources, which includes but is not limited to the exhaust gas of a combined-cycle heat-recovery steam generator or a single-cycle gas turbine. A calculation model of the equilibrium running point is used for the given load and the characteristic curves of the compressor and the turbine to study the mechanism of the inlet air heating technology. Then, the equilibrium running line is calculated and drawn in the characteristic curves of the compressor and the turbine. The factors for gas turbine efficiency are discussed through the calculated equilibrium running line. The results show that an increase in inlet air temperature has considerable potential for improving gas turbine efficiency due to the increase in compressor and turbine efficiency. This finding is different from traditional viewpoints. Meanwhile, each partial load has an optimum heating temperature which becomes higher when the load is lower.

Suggested Citation

  • ZhiTan Liu & XiaoDong Ren & ZhiYuan Yan & HongFei Zhu & Tao Zhang & Wei Zhu & XueSong Li, 2019. "Effect of Inlet Air Heating on Gas Turbine Efficiency under Partial Load," Energies, MDPI, vol. 12(17), pages 1-11, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3327-:d:261923
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    References listed on IDEAS

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    1. Variny, Miroslav & Mierka, Otto, 2009. "Improvement of part load efficiency of a combined cycle power plant provisioning ancillary services," Applied Energy, Elsevier, vol. 86(6), pages 888-894, June.
    2. Kakaras, E. & Doukelis, A. & Karellas, S., 2004. "Compressor intake-air cooling in gas turbine plants," Energy, Elsevier, vol. 29(12), pages 2347-2358.
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    4. Farzaneh-Gord, Mahmood & Deymi-Dashtebayaz, Mahdi, 2011. "Effect of various inlet air cooling methods on gas turbine performance," Energy, Elsevier, vol. 36(2), pages 1196-1205.
    5. Mohapatra, Alok Ku & Sanjay,, 2014. "Thermodynamic assessment of impact of inlet air cooling techniques on gas turbine and combined cycle performance," Energy, Elsevier, vol. 68(C), pages 191-203.
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    Cited by:

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