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A novel EFHAT system and exergy analysis with energy utilization diagram

Author

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  • Jin, Hongguang
  • Zhao, Hongbin
  • Liu, Zelong
  • Cai, Ruixian

Abstract

In this paper, a new type of gas turbine cycle has been proposed based on an innovative combination of a newly designed HAT cycle with an externally fired heater. In this manner, “dirty” fuels such as coal and biomass can be more efficiently used than before and the water in this cycle can be recycled. This is radically different from the conventional HAT cycle. In particular, the temperature of the clean humid air out of the turbine is not restricted by the dew point of gas. Hence, some amount of latent heat can be utilized to generate hot water being supplied to the humidifier. This will enhance the humidification ability for improving performance of the system. The new system is also analyzed by using the graphical exergy methodology based on energy-utilization diagrams (EUDs). As a result, for a turbine inlet temperature (TIT) of 1073 K, the thermal efficiency of the new system may be as high as 45.37%. The new system will effectively recover both the energy quality and quantity at the low- and middle-temperature ranges.

Suggested Citation

  • Jin, Hongguang & Zhao, Hongbin & Liu, Zelong & Cai, Ruixian, 2004. "A novel EFHAT system and exergy analysis with energy utilization diagram," Energy, Elsevier, vol. 29(12), pages 1983-1991.
    • Handle: RePEc:eee:energy:v:29:y:2004:i:12:p:1983-1991
    DOI: 10.1016/j.energy.2004.03.009
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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.
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    Cited by:

    1. Han, Wei & Jin, Hongguang & Xu, Wei, 2007. "A novel combined cycle with synthetic utilization of coal and natural gas," Energy, Elsevier, vol. 32(8), pages 1334-1342.
    2. Costa, V.A.F., 2021. "ENERGY-EXERGY diagrams for states and energy and exergy balance equations representation," Energy, Elsevier, vol. 218(C).
    3. Chacartegui, R. & Blanco, M.J. & Muñoz de Escalona, J.M. & Sánchez, D. & Sánchez, T., 2013. "Performance assessment of Molten Carbonate Fuel Cell–Humid Air Turbine hybrid systems," Applied Energy, Elsevier, vol. 102(C), pages 687-699.
    4. Wang, Zefeng & Han, Wei & Zhang, Na & Liu, Meng & Jin, Hongguang, 2017. "Exergy cost allocation method based on energy level (ECAEL) for a CCHP system," Energy, Elsevier, vol. 134(C), pages 240-247.
    5. Chen, Heng & Qi, Zhen & Dai, Lihao & Li, Bin & Xu, Gang & Yang, Yongping, 2020. "Performance evaluation of a new conceptual combustion air preheating system in a 1000 MW coal-fueled power plant," Energy, Elsevier, vol. 193(C).

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