Numerical investigation of protection measures against water hammer in the Yeşilvadi hydropower plant

Date

2014-10-25

Author

Dursun, Samet
Bozkuş, Zafer

Metadata

Show full item record

Item Usage Stats

118
views

0
downloads

Pressurized hydraulic systems are vulnerable to water hammer, which is an unsteady hydraulic problem. Changes of direction or velocity of the water in the system cause sudden increase in pressure and pipeline may collapse or burst. The purpose of this paper is to analyze pressure relief valves (PRV), which are used as protection measures against water hammer, numerically and compare the results with measured field data of a run-of-river hydropower plant project. The hydropower system is investigated numerically with a computer program using method of characteristics for solving nonlinear equations of transient flow. Load rejection, and instant load rejection scenarios for two different cases which are system without a protection measure, and the existing system including pressure relief valves are analyzed and presented in this paper. It is observed that, relief valves are effective in decreasing the turbine runaway speed. However, improper operation of these valves causes higher transient pressure values.

Subject Keywords

Water hammer, Pressure relief valves, Protection measures, Hydropower plants

URI

https://hdl.handle.net/11511/88235

Conference Name

International Congress on Advances in Civil Engineering,( 21 - 25 Ekim 2014)

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Modeling and Experimental Study of Newtonian Fluid Flow in Annulus SORGUN, Mehmet; Ozbayoglu, M. Evren; Aydın, İsmail (2010-09-01) A major concern in drilling operations is the proper determination of frictional pressure loss in order to select a mud pump and avoid any serious problems. In this study, a mechanistic model is proposed for predicting the frictional pressure losses of light drilling fluid, which can be used for concentric annuli. The experimental data that were available in the literature and conducted at the Middle East Technical University-Petroleum Engineering (METU-PETE) flow loop as well as computational fluid dynamic...
Investigation of the Water Hammer Problems in Water-Wind Hybrid Systems Dincer, Ali Ersin; Bozkuş, Zafer (2015-07-01) Water hammer is an undesirable event, caused by sudden flow changes in confined pipe systems. When it occurs, its consequences can be very costly and even sometimes deadly. In general, it may be encountered in the penstocks of hydropower plants, water transmission lines, water networks, etc. Therefore, the operation guidelines of the hydropower plants should be defined correctly and if necessary, preventive measures should be considered. In the present study, water hammer problems in pumped-storage hydropow...
Numerical modeling of counter-current spontaneous imbibition during underbalanced drilling Naseri, Masoud; Sınayuç, Çağlar (2012-09-10) Mud solid and filtrate invasion are the most common causes of formation damage during overbalanced drilling (OBD), which is a method of drilling in which the wellbore pressure remains greater than formation pressure. During the past ten years, underbalanced drilling operations (UBD), which can be defined as a drilling method in which the wellbore pressure is less than formation pressure, has been growing due to their applications such as prevention of lost circulation, reduction of filtration lost in natura...
Investigation of water hammer problems and potential solutions in pump discharge lines Erdem, Recep Çağrı; Bozkuş, Zafer; Department of Civil Engineering (2019) Disturbance in boundary conditions of a hydraulic system could cause rapid change in flow velocity in confined pipe systems. Pressure wave leading to an event called water hammer may occur as a consequence of that disturbance. Water hammer could lead to catastrophic failures on the hydraulic systems. Thus, proper protection measures should be defined and installed in the system before it is put into operation. The aim of this study is to analyze a pumped discharge line and ensure its safe operation against ...
A new computer code development for solving fluid transient problems in pressurized pipelines Uyanık, Murat Cenk; Bozkuş, Zafer; Department of Civil Engineering (2023-1-26) The water hammer phenomenon, which occurs as a result of changes in the boundary conditions of hydraulic systems, can cause major and dangerous problems. Opening or closing of the valve component, sudden power loss or pump startup, change of water level in the reservoir, etc. can be examples of these boundary condition changes. These problems must be considered at the design stage of hydraulic pipeline systems in order to predict and prevent dangerous results. Since the calculation of water hammer analysis ...

Citation Formats

S. Dursun and Z. Bozkuş, “Numerical investigation of protection measures against water hammer in the Yeşilvadi hydropower plant,” presented at the International Congress on Advances in Civil Engineering,( 21 - 25 Ekim 2014), İstanbul, Türkiye, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/88235.