Specifications

Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
7.
Accession number: 20130916053079
Title: Hydraulic design of a low-specific speed Francis runner for a hydraulic cooling tower
Authors: Ruan, H.1 ; Luo, X.Q.1, 2 ; Liao, W.L.1 ; Zhao, Y.P.1/;罗兴锜;廖伟丽;
Author affiliation: 1 Institute of Water Resources and Hydro-Electric Engineering, Xi'An
University of Technology, Xi'an 710048, China
2 FINE Institute for Hydraulic Machinery, Hangzhou 310013, China
Corresponding author: Ruan, H. ([e-mail])
Source title: IOP Conference Series: Earth and Environmental Science
Abbreviated source title: IOP Conf. Ser. Earth Environ. Sci.
Volume: 15
Issue: PART 3
Monograph title: 26th IAHR Symposium on Hydraulic Machinery and Systems - Session 1:
Hydraulic Turbines and Pumps
Issue date: 2012
Publication year: 2012
Article number: 032011
Language: English
ISSN: 17551307
E-ISSN: 17551315
Document type: Conference article (CA)
Conference name: 26th IAHR Symposium on Hydraulic Machinery and Systems
Conference date: August 19, 2012 - August 23, 2012
Conference location: Beijing, China
Conference code: 95632
Publisher: Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United
Kingdom
Abstract: The air blower in a cooling tower is normally driven by an electromotor, and the
electric energy consumed by the electromotor is tremendous. The remaining energy at the outlet
of the cooling cycle is considerable. This energy can be utilized to drive a hydraulic turbine and
consequently to rotate the air blower. The purpose of this project is to recycle energy, lower
energy consumption and reduce pollutant discharge. Firstly, a two-order polynomial is proposed
to describe the blade setting angle distribution law along the meridional streamline in the
streamline equation. The runner is designed by the point-to-point integration method with a
specific blade setting angle distribution. Three different ultra-low-specificspeed Francis runners
with different wrap angles are obtained in this method. Secondly, based on CFD numerical
simulations, the effects of blade setting angle distribution on pressure coefficient distribution and
relative efficiency have been analyzed. Finally, blade angles of inlet and outlet and control
coefficients of blade setting angle distribution law are optimal variables, efficiency and minimum
pressure are objective functions, adopting NSGA-II algorithm, a multi-objective optimization for
ultra-low-specific speed Francis runner is carried out. The obtained results show that the optimal
runner has higher efficiency and better cavitation performance. © 2013 Published under licence