Summary
Draft tubes with a sharp heel are quite common in hydro power stations constructed 50 years ago. This design reduced both construction time and investment. We have shown that there is potential for increasing unit performance by a moderate modification of such draft tubes. The redesign has been done with the aid of model tests in a turbine rig. The new design has been installed in a 50 MW hydro unit and an efficiency improvement in the order of 0.5% has been verified through accurate measurements.
Résumé
Il ya nombreux des aspirateurs avec talons acérés dans stations hydroélectrique plusieurs de cinquante ans. Cet design reduit le temps de construction et l’investissement. Nous avons montré un augmentation potentiel de rendement, aprés un changement modéré. Les experiments ont realisé utilisant notre laboratoire de turbines moderne. Le design nouvel est implementé dans un tube d’aspiratuer de Kaplan turbine (puissance 50 MW). Un augmentation environ de 0.5% est verifié aprés essais sur place.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Gubin, M. F. (1973) Draft tubes of hydro-electric stations, Amerind publishing Co, New Dehli.
Marcinkiewicz, J and Svensson, L (1994) Modification of the spiral casing geometry it the neighbourhood of the guide vanes and its influence on the efficiency of a Kaplan turbine,XVII IAHR symposium China, 1994
International standard IEC 995 (1991), Determination of the prototype performance from model acceptance tests of hydraulic machines with consideration of scale effects.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1996 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Dahlbäck, N. (1996). Redesign of Sharp Heel Draft Tube — Results from Tests in Model and Prototype. In: Cabrera, E., Espert, V., Martínez, F. (eds) Hydraulic Machinery and Cavitation. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9385-9_100
Download citation
DOI: https://doi.org/10.1007/978-94-010-9385-9_100
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-9387-3
Online ISBN: 978-94-010-9385-9
eBook Packages: Springer Book Archive