A novel design and performance optimization methodology for hydraulic Cross-Flow turbines using successive numerical simulations

RENEWABLE ENERGY

卷:169

Article

Mehr, Goodarz^1,3  Durali, Mohammad²  Khakrand, Mohammad Hadi¹  Hoghooghi, Hadi^1,4 

[1] Sharif Univ Technol, Dept Mech Engn, Tehran, Iran

[2] Sharif Univ Technol, Mech Engn, Azadi Ave, Tehran 111559567, Iran

[3] Virginia Tech, Dept Mech Engn, Blacksburg, VA 24061 USA

[4] Swiss Fed Inst Technol, Dept Mech & Proc Engn, Zurich, Switzerland

关键词: Cross-flow turbine;    Parametric design;    Computational fluid dynamics (CFD);    Optimization;   

DOI  :  10.1016/j.renene.2021.01.090

来源: Elsevier

【 摘 要 】

This paper introduces a new methodology for designing and optimizing the performance of hydraulic Cross-Flow turbines for a wide range of operating conditions. The methodology is based on a one-step approach for the system-level design phase and a three-step, successive numerical analysis approach for the detail design phase. Compared to current design methodologies, not only does this approach break down the process into well-defined steps and simplify it, but it also has the advantage that once numerical simulations are conducted for a single turbine, most of the results can be used for an entire class of Cross-Flow turbines. In this paper, after a discussion of the research background, we explain the design process used and the ANSYS (R)-based CFD model of the turbine in detail. The design process consists of three steps. First, designing nozzle geometry; second, optimizing runner parameters; and third, enhancing turbine performance by analyzing various load conditions. A turbine designed using this process in a simulation case study achieves a peak hydraulic efficiency of 91% and peak overall efficiency of 82% that is maintained for volume flow rates as low as 14% of the nominal value and water head variations up to 30% of the nominal value. (C) 2021 Elsevier Ltd. All rights reserved.

【 授权许可】

Free