Hydraulic design of tyrolean weirs in hydropower plant projects

Maraş, Cihan
Intake structures are defined as structures that divert water into a channel or tunnel leading to a powerhouse. A water intake structure must be able to divert the design discharge into the conveyance system with minimum head loss and negative impact on the local environment. Design and location of intakes are dependent on geological, hydraulic, structural and economic conditions. Tyrolean type water-intake structures are commonly constructed on steeply sloped mountain rivers with reliable rock foundation to divert water. The amount of water to be diverted from the main channel is the major concern in these kind of structures. Incoming flow must satisfy the design discharge for an appropriate design. There are various parameters affecting the amount of diverted water and the present work does not fully clarify hydraulics of this structure. In this study, design methods of Tyrolean type water intake structures are researched. The researches are made in two perspectives named as constant energy level and constant energy head hypothesis. In the first stage of this study, the theoretical methods related to the design of Tyrolean weirs are presented. In the second stage experimental solutions obtained as a result of hydraulic studies are discussed. In the third stage outcome of the theoretical methods vi are compared with the experimental methods. It was shown that the Tyrolean weir designed with the method based on experimental results provides more diverted discharge from the main channel with a trash rack of shorter length than those of the other methods. Finally, the situations of some of the currently operating facilities are examined.


Development of a computer software for hydraulic design of small hydropower facility
Alimoğlu, Emir; Yanmaz, A Melih; Bozkuş, Zafer; Department of Civil Engineering (2012)
Run-of-river type hydroelectrical power plants are the facilities that use only the available flow on the river without storing it to generate electrical energy. These kind of facilities are composed of structural components such as diversion weir, conveyance line, forebay, penstock and power house. In this thesis, a computer program called “MiniHEPP Hydraulic Design” is developed in order to perform the hydraulic design of run-of-river type hydropower plants. This program which runs under the Windows opera...
Hydraulic characteristics of tyrolean weirs having steel racks and circular-perforated entry
Şahiner, Halit; Göğüş, Mustafa; Department of Civil Engineering (2012)
Tyrolean type water-intake structures are commonly used on mountain rivers to supply water to hydropower stations. The amount of water to be diverted from the main channel is the major concern in these kind of structures and should not be less than the design discharge. In this study a physical model of a Tyrolean type water-intake structure was built at the laboratory and the diverted flow from the main channel through the intake structure having steel racks and perforated plates of different types were me...
Design of settling basins and related problems encountered in practice
Zaloğlu, Fatma Deniz; Göğüş, Mustafa; Department of Civil Engineering (2013)
Settling basins are the hydraulic structures used to get sediment-free water from rivers mostly for hydropower systems. Mainly fine sediment is trapped along the settling basins and from time to time the accumulated sediment in the settling basin is flushed away. A wrong design of a settling basin creates lots of problems. In this study based on the hydraulic analysis of a settling basin, the available settling basin design procedures in the literature were reviewed. Some of the settling basins constructed ...
Prediction of downpull on high head gates using computational fluid dynamics
Uysal, Mehmet Akış; Köken, Mete; Aydın, İsmail; Department of Civil Engineering (2014)
For design purposes it is important to predict the downpull forces on the tunnel gates installed in the intake of a hydropower plant. In this study downpull forces on the gates are evaluated for different closure rates and for different gate lip geometries using computational fluid dynamics and the results are compared to an existing experimental study. Commercial ANSYS FLUENT software is used in the calculations. It is found that downpull coefficients obtained from computational study showed good agreement...
Structural monitoring of andirap bridge for overload passage
Türer, Ahmet (2009-01-01)
Andirap bridge is located over Seyhan river passing a deep valley and has a big strategic importance since heavy loaded trucks carrying excavation and fill material from Kavsak Bendi hydroelectric power plant construction site have to use the bridge. Serious concerns were raised since Andirap bridge may not be adequately strong to carry about 250 trucks per day, each weighting more than 50 tons for the coming next two years. A preliminary visual and analytical evaluation of the bridge has leaded instrumente...
Citation Formats
C. Maraş, “Hydraulic design of tyrolean weirs in hydropower plant projects,” M.S. - Master of Science, Middle East Technical University, 2014.