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Multipoint Design Optimization of a Radial-Outflow Turbine for Kalina Cycle System Considering Flexible Operating Conditions and Variable Ammonia-Water Mass Fraction

Author

Listed:
  • Peng Song

    (School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Jinju Sun

    (School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Shengyuan Wang

    (School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Xuesong Wang

    (School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

The radial-outflow turbine has advantages due to its liquid-rich gas adaptability when applied in the Kalina ammonia-water cycle system. However, the operational conditions of the turbine often deviate from its design values due to changes of the heat source or the cooling conditions, and such deviates may deteriorate the flow behavior and degrade the turbine performance. To enhance the turbine efficiency at complex conditions for flexible running of the Kalina cycle system, a multipoint design optimization method is developed: the flexible operating has been defined by three critical, dimensionless parameters, which cover a wide range in a 3D operating space; the representative off-design points are identified to define the objective function; and adaptive optimization methods are integrated to permit optimization searching using limited CFD callings. The developed multipoint design method is adopted to improve the turbine performance under complex operating conditions. The obtained results demonstrate that the application of the developed multipoint optimization method effectively eliminates the flow separation at various operating conditions; thus, the turbine off-design performance has been comprehensively improved.

Suggested Citation

  • Peng Song & Jinju Sun & Shengyuan Wang & Xuesong Wang, 2022. "Multipoint Design Optimization of a Radial-Outflow Turbine for Kalina Cycle System Considering Flexible Operating Conditions and Variable Ammonia-Water Mass Fraction," Energies, MDPI, vol. 15(22), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:22:p:8748-:d:979256
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    References listed on IDEAS

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    Cited by:

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    2. Cheng, Ziyang & Wang, Jiangfeng & Hu, Bin & Chen, Liangqi & Lou, Juwei & Cheng, Shangfang & Wu, Weifeng, 2024. "Improved modelling for ammonia-water power cycle coupled with turbine optimization design: A comparison study," Energy, Elsevier, vol. 292(C).

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