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

Download

index.pdf

Date

2013

Author

Dursun, Samet

Metadata

Show full item record

Item Usage Stats

106
views

67
downloads

The purpose of this thesis is to analyze protection measures against water hammer numerically and compare the results with measured field data of Yesilvadi HEPP project. Pressure relief valves are used as protective measure against water hammer in Yesilvadi HEPP project formulation. The hydropower system is investigated numerically with software, Bentley HAMMER, which uses method of characteristics for solving nonlinear equations of transient flow. Yesilvadi HEPP project is analyzed for load rejection, instant load rejection, load acceptance and load variation scenarios for three different cases which are system without a protection measure, the existing system including pressure relief valves, and system as if including a surge tank instead of pressure relief valves against water hammer. The pressure variations at the inlets of turbines, maximum and minimum hydraulic grade lines of the water transmission line and rotational speed of turbines are computed and compared with measured data for these three different cases. Eventually, the effectiveness of protection measures are compared and some suggestions are made for appropriate operation of existing pressure relief valves to either diminish or decrease the effects of water hammer in Yesilvadi HEPP project.

Subject Keywords

Water-power., Water hammer., Relief valves.

URI

http://etd.lib.metu.edu.tr/upload/12616712/index.pdf
https://hdl.handle.net/11511/23221

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Design optimization of rocket nozzles in chemically reacting flows Yumusak, M.; Eyi, Sinan (2012-07-30) The objective of this study is to develop a reliable and efficient design tool that can be used in chemically reacting flows. The flow analysis is based on the axisymmetric Euler and the finite rate chemical reaction equations. The finite rate chemistry model includes eight species and eleven reaction equations. These coupled equations are solved by using Newton's method. Both the numerical and the analytical methods are used to calculate the Jacobian matrices. Sensitivities are evaluated by using the adjoi...
Performance evaluation of satellite- and model-based precipitation products over varying climate and complex topography Amjad, Muhammad; Yılmaz, Mustafa Tuğrul; Yücel, İsmail; Yılmaz, Koray Kamil (Elsevier BV, 2020-05-01) Accuracy assessment of precipitation retrievals is a pre-requisite for many hydrological studies as it helps to understand the source and the magnitude of the uncertainty in hydrological response variables, particularly over regions with complex topography. This study evaluates GPM IMERGv05, TMPA 3B42V7, ERA-Interim, and ERA5 precipitation products using 256 ground-based gauge stations between 2014 and 2018 over Turkey known to have complex topography and varying climate. Error statistics, categorical perfo...
Computerized economic optimization of refrigeration system design Usta, N; Ileri, A (1999-07-01) The purpose of this paper is to show the importance of economic optimization of large capacity or industrial refrigeration systems and to present the results and conclusions obtained by a computer software which was developed specifically to determine the economic optimum values of the design parameters of refrigeration systems. Both liquid chillers and groups of cold storage rooms operating at various levels of low temperatures are covered. Various case studies and sensitivity analyses have been performed ...
Data driven landslide hazard assessment using geographical information systems and remote sensing Süzen, Mehmet Lütfi; Doyuran, Vedat; Department of Geological Engineering (2002) The purpose of this thesis is to generate and evaluate a concise system of data driven landslide hazard assessment procedure. The Asarsuyu catchment area and Bolu Mountain highway pass are selected for this purpose In this study, three data domains, which are remote sensing products, geological maps and topographical maps are used. The landslides of four different historical periods are interpreted using aerial photographs. Land cover is extracted from satellite images. Thirteen sets of parameter maps are p...
Evaluation of displacement coefficient method for seismically retrofitted buildings with various ductility capacities Dicleli, Murat (Wiley, 2014-07-25) This research study is aimed at evaluating the accuracy of the displacement coefficient method (DCM) of FEMA 440 and associated nonlinear static procedure (NLSP) for actual buildings with soft story mechanism and various ductility capacities. The DCM and associated NLSP are evaluated using two existing seismically vulnerable buildings with soft story mechanism. The buildings are first retrofitted using a ductile steel-brace-link system to represent those with good ductility capacity and then retrofitted wit...

Citation Formats

S. Dursun, “Numerical investigation of protection measures against water hammer in the yesilvadi hydropower plant,” M.S. - Master of Science, Middle East Technical University, 2013.