Hydroturbine Runner Design and Manufacturing

Ayancik, Fatma; Aradag, Umut; Ozkaya, Ece; Çelebioğlu, Kutay; Ünver, Özgür; Aradağ, Selin

doi:10.7763/ijmmm.2013.v1.35

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…[67], [78], [128], [129]. Since is reasonably constant, the plots to a large extent confirm the conventional facts that the power depends directly on the flow rate and the available head.…”

Section: Methodssupporting

confidence: 61%

Experimental Investigation of the Influence of Penstock Configuration and Angle of Twist of Flat Blades on the Performance of a Simplified Pico-Hydro System

Edeoja¹,

Awuniji²

2017

EJERS

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The effects of penstock configuration and lateral twist angle of the flat blades on the performance of a simplified Pico hydro system were examined as part of an ongoing development. Two configurations of the penstock having 2 and 1 stages of area reductions from 3 to 2 inches and 3 to 2 inches within the lower 1 m of their total height were used. Turbine runners with flat blades laterally twisted at angles of 30, 45, 60, 75 and 90° were fabricated locally and the system performance studied. The speed of rotation of the alternator and turbine shafts were measured and the available fluid power, flow rate and net head were computed. The results show that the 90° blade twist gave the best performance of the simplified system in terms of rotational speed and consequently power for both penstock configurations while the 30° twist yielded the least values of the parameters. However, the respective values for the 1st configuration were relatively higher for all the twist angles used. The maximum values of the parameters obtained for the 2-stage area reduction were 1844.7 rpm and 3636 W while the corresponding values for the other configuration were 1810.6 rpm and 2422 W The simplicity of the flat blade configuration coupled with the system performance for the entire blade twist angles indicates good promise for the implementation of the system for generation of clean, decentralized energy in line with current global trends even in locations without naturally flowing water.

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“…[67], [78], [128], [129]. Since is reasonably constant, the plots to a large extent confirm the conventional facts that the power depends directly on the flow rate and the available head.…”

Section: Methodssupporting

confidence: 61%

Experimental Investigation of the Influence of Penstock Configuration and Angle of Twist of Flat Blades on the Performance of a Simplified Pico-Hydro System

Edeoja¹,

Awuniji²

2017

EJERS

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“…The runners are fabricated in different kinds of ferrous alloys, like cast iron, carbon steels, and stainless steels [1]. The development of runner objectives the maximum efficiency and the design is done for different parts (blades, crown, band, and others), which must be assembled [5]. The runner can be manufactured in one single casted section [6] or cast or forged in many parts, which are welded by arc electric processes, SMAW (Shielded Metal Arc Welding), ESW (Electroslag Welding), and specially GMAW (Gas Metal Arc Welding) and its variations [7,8].…”

Section: Hydraulic Turbine Runnersmentioning

confidence: 99%

Welding and Thermal Spray Processes for Maintenance of Hydraulic Turbine Runners: Case Studies

Váz

Tristante²,

Pukasiewicz

et al. 2021

Soldag. insp.

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Hydraulic runners are susceptible to failures by cracks or wear by erosion, corrosion, or cavitation. The modern runners are fabricated in carbon steel and martensitic stainless steel. Arc welding processes normally do the repair of eroded areas, or cracked parts. Each material or type of repair needs specific criteria, procedures, and precautions to guarantee their success and prevent future issues, like the recurrence of the cracks or reduction of the useful life of the runner by modifications of the original material. Wear-resistant coatings are applied by welding or by thermal spray processes, considering this last one has no metallurgical interaction with the material of the runner, keeping the original properties of the material. For several years the companies Copel GeT, Lactec, UTFPR, and UFPR collaborate on the study of different techniques, methods, and processes to repair hydraulic runners, this work aims to present a short compilation, and examples of some results obtained applied on real runners.

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“…It was found that for minimizing water consumption, the ration of head loss to gross head should remain below 15%. F. Fatma Ayancik, Umut Aradag et al 2013 [3] a collaborative design methodology is developed for the design and manufacturing of hydro turbine runners. The design of runner blade to get the desired head and efficiency depends on the correction of runner shape with trial-error, in-house MATLAB codes.…”

Section: Literature Reviewmentioning

confidence: 99%

Dimensional Analysis for Determining Optimal Discharge and Penstock Diameter in Reaction Turbines: An Overview

Nemane¹

2019

IJRASET

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The objective is to conduct a literature review to provide general insights for minimize the consumption of water while producing hydro electric power. The analysis presented in paper is based on the penstocks geometric and hydraulic characteristics, hydraulic head, and the desired power production. Minimizing water consumption for energy production may affect the availability of water for other purposes such as irrigation and navigation. Various dimensionless relationships between power production, flow discharge, and head losses were derived by authors. As mentioned in this analysis it was found that for minimizing water consumption, the ratio of head loss to gross head should remained not more than 15%. An example on reaction turbine of application is presented for determining optimal flow discharge and optimal penstock diameter for reaction turbine.

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Hydroturbine Runner Design and Manufacturing

Cited by 6 publications

References 4 publications

Experimental Investigation of the Influence of Penstock Configuration and Angle of Twist of Flat Blades on the Performance of a Simplified Pico-Hydro System

Experimental Investigation of the Influence of Penstock Configuration and Angle of Twist of Flat Blades on the Performance of a Simplified Pico-Hydro System

Welding and Thermal Spray Processes for Maintenance of Hydraulic Turbine Runners: Case Studies

Dimensional Analysis for Determining Optimal Discharge and Penstock Diameter in Reaction Turbines: An Overview

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