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Investigation of waterhammer problems in the penstocks of pumped-storage power plants
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Date
2013
Author
Dinçer, Ali Ersin
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Waterhammer is an undesirable event, caused by sudden flow changes in a confined pipe system. 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. In this thesis, waterhammer problems in pumped storage hydropower plants are investigated. Time dependent flow conditions in the penstocks are studied by the help of computer software, HAMMER. The software solves nonlinear differential equations by using method of characteristics. Firstly, hydraulic transients for various operational cases are investigated using some scenarios. Then a surge tank, protective device for waterhammer, is added to the system and for the same operational cases, hydraulic transients are studied again. Finally, the results obtained from the operation of the system with and without surge tank are compared. Wind-hydro hybrid systems are also included in the study.
Subject Keywords
Hydraulic transients.
,
Water hammer.
,
Water-pipes
,
Hydraulic machinery.
,
Hydroelectric power plants.
URI
http://etd.lib.metu.edu.tr/upload/12615452/index.pdf
https://hdl.handle.net/11511/22358
Collections
Graduate School of Natural and Applied Sciences, Thesis
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Waterhammer 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. In the present study, waterhammer problems in wind-hydro hybrid plants are investigated. Time dependent flow conditions in the pen...
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Sudden flow changes in confined pipe systems generate transient flow (waterhammer) conditions accompanied with very high or sometimes very low pressures traveling back and forth in the system. Depending on the magnitude of those pressures, pipe collapse or pipe bursting may take place at the weakest points of the system, resulting in costly damages as well as loss of human lives in some cases. In general, it may be encountered in the penstocks of hydropower plants, water transmission lines and water network...
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A. E. Dinçer, “Investigation of waterhammer problems in the penstocks of pumped-storage power plants,” M.S. - Master of Science, Middle East Technical University, 2013.
