Bayesian Optimization Design of Inlet Volute for Supercritical Carbon Dioxide Radial-Flow Turbine

Bian, Chao; Zhang, Shaojie; Yang, Jinguang; Liu, Haitao; Zhao, Feng; Wang, Xiaofang

doi:10.3390/machines9100218

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…Compared with genetic algorithms, the ISAA method saves 59.6% of computational time and 41.5% of computational time compared to the SAA method. [69]. First, they carried out parameter sensitivity analysis based on the Gaussian process surrogate model, and then realized the Bayesian optimization (BO) process.…”

Section: S-co2 Power Cyclementioning

confidence: 99%

A review of research on turbines for supercritical carbon dioxide power systems

Hu,

Jiang,

Zhuge

et al. 2024

J. Phys.: Conf. Ser.

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Supercritical carbon dioxide (S-CO2) Brayton cycle has been known as a potential power cycle technology because of its high efficiency, compact structure and suitability for different heat sources. As one of the key components in the cycle, the turbine has an important impact on the cycle efficiency. Compared with traditional steam and gas turbines, S-CO2 turbines have high working pressure and small size. The internal flow characteristics are significantly different. In this paper, the research progress of S-CO2 turbines in recent years is reviewed. The design and performance evaluation methods for S-CO2 turbines of different types and power levels are summarized, and research on loss correlations and optimization algorithms are introduced. The features of flow field in S-CO2 turbines are discussed. Current studies mainly evaluate the flow field and flow losses through Computational Fluid Dynamics (CFD), and some studies further analyze the influencing mechanism of turbine geometric parameters on flow characteristics. The applications of multi-physical field analysis on S-CO2 turbines are also reviewed. The construction and operation of S-CO2 test loops, and relevant turbine experimental study findings are introduced. Future research directions of S-CO2 turbines are proposed.

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Section: S-co2 Power Cyclementioning

confidence: 99%

A review of research on turbines for supercritical carbon dioxide power systems

Hu,

Jiang,

Zhuge

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Yang et al [9] analyzed the effects of different aspect ratio distribution regimes for the same sectional shape on the turbocharger turbine performance under pulsating flow conditions through experiments and CFD simulations. Bian et al [10] optimized the geometric parameters (global spread angle, corner radius factor, outlet size factor) of a trapezoid section volute using the Bayesian optimization algorithm through CFD simulations, which resulted in a significant improvement of the flow loss inside the volute and the flow distortion at the volute outlet. Furthermore, the outlet size factor was found to be the most influential of the three optimization factors on the optimization objective.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Effects of Volute Geometric Parameters on the Performance of Pico Francis Turbines Used in Water Pipes

Kang,

Xin,

et al. 2024

Water

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The development of new hydro turbines or the optimization of traditional hydro turbines is one of the research directions that scholars have been interested in to broaden the source of hydropower and improve energy efficiency. In our previous work, a Francis turbine was used in the water supply systems of high-rise buildings to properly control water pressure inside the pipeline and recover excess water energy. In this paper, an optimization study of the volute for the sectional shape, design method, inlet parameters, outlet width, and tongue was conducted using numerical simulations to improve the hydro turbine performance. The simulated results show that a circular section could better enhance the flow velocity inside the volute and make the flow velocity distribution more uniform at the volute outlet, and the equal mean velocity method is a more suitable volute design method in this special condition. The results of range analysis show that the water head reduction increases significantly with the increase in the inlet height, and both inlet height and outlet width have a significant effect on the efficiency. In addition, in the tongue optimization, a larger tilt angle corresponds to smaller output power and water head reduction; a larger stretch length in the limited angle range corresponds to larger output power and lower efficiency. Ultimately, the output power of the hydro turbine was increased by 18.65% and the efficiency by 2.1% through the volute optimization.

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Design and analysis of an axial turbine for high-temperature organic Rankine cycle

Dong,

Wang,

et al. 2023

Thermal Science and Engineering Progress

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Bayesian Optimization Design of Inlet Volute for Supercritical Carbon Dioxide Radial-Flow Turbine

Cited by 4 publications

References 33 publications

A review of research on turbines for supercritical carbon dioxide power systems

A review of research on turbines for supercritical carbon dioxide power systems

Investigation on the Effects of Volute Geometric Parameters on the Performance of Pico Francis Turbines Used in Water Pipes

Design and analysis of an axial turbine for high-temperature organic Rankine cycle

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