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Cascade utilization of chemical energy of natural gas in an improved CRGT cycle

Author

Listed:
  • Han, Wei
  • Jin, Hongguang
  • Zhang, Na
  • Zhang, Xiaosong

Abstract

In this paper three advanced power systems: the chemically recuperated gas turbine (CRGT) cycle, the steam injected gas turbine (STIG) cycle and the combined cycle (CC), are investigated and compared by means of exergy analysis. Making use of the energy level concept, cascaded use of the chemical exergy of natural gas in a CRGT cycle is clarified, and its performance of the utilization of chemical energy is evaluated. Based on this evaluation, a new CRGT cycle is designed to convert the exergy of natural gas more efficiently into electrical power. As a result, the exergy efficiency of the new CRGT cycle is about 55%, which is 8 percentage points higher than that of the reference CRGT cycle. The analysis gave a better interpretation of the inefficiencies of the CRGT cycle and suggested improvement options. This new approach can be used to design innovative energy systems.

Suggested Citation

  • Han, Wei & Jin, Hongguang & Zhang, Na & Zhang, Xiaosong, 2007. "Cascade utilization of chemical energy of natural gas in an improved CRGT cycle," Energy, Elsevier, vol. 32(4), pages 306-313.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:4:p:306-313
    DOI: 10.1016/j.energy.2006.06.014
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    References listed on IDEAS

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    1. Jin, Hongguang & Ishida, Masaru, 1993. "Graphical exergy analysis of complex cycles," Energy, Elsevier, vol. 18(6), pages 615-625.
    2. Jonsson, Maria & Yan, Jinyue, 2005. "Humidified gas turbines—a review of proposed and implemented cycles," Energy, Elsevier, vol. 30(7), pages 1013-1078.
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    Cited by:

    1. Maria Elena Diego & Muhammad Akram & Jean‐Michel Bellas & Karen N. Finney & Mohamed Pourkashanian, 2017. "Making gas‐CCS a commercial reality: The challenges of scaling up," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(5), pages 778-801, October.
    2. Zhao, Hongbin & Yue, Pengxiu, 2011. "Performance analysis of humid air turbine cycle with solar energy for methanol decomposition," Energy, Elsevier, vol. 36(5), pages 2372-2380.
    3. Luo, Chending & Zhang, Na & Lior, Noam & Lin, Hu, 2011. "Proposal and analysis of a dual-purpose system integrating a chemically recuperated gas turbine cycle with thermal seawater desalination," Energy, Elsevier, vol. 36(6), pages 3791-3803.
    4. Zhang, Na & Wang, Zefeng & Lior, Noam & Han, Wei, 2018. "Advancement of distributed energy methods by a novel high efficiency solar-assisted combined cooling, heating and power system," Applied Energy, Elsevier, vol. 219(C), pages 179-186.

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