Effect of Pressure Relief Valves on the Fluid Transients in the Penstocks of a Small Run of River Plant

Samet, Dursun
Bozkuş, Zafer
Dinçer, Ali Ersin
It is essential that hydropower plants be operated safely under all conditions. Commonly, engineers design the penstocks of such power plants for negative and/or positive pressure surges, making sure that the penstocks neither will burst nor collapse under adverse flow conditions. The primary goal of this study is to present the test results of an existing run-of-river plant whose penstocks are protected with pressure relief valves near the turbines. Numerical simulations of unprotected system were also performed to compare its results with the test results for various scenarios. It is observed that relief valves are effective in decreasing the turbine runaway speed. However, improper operation of these valves, say rapid opening or closing patterns of these valves may cause secondary water hammer.


Effects of ultrasound pretreatment and anaerobic digestion on the energy potential of sludge
Çelebi, Emrehan Berkay; Sanin, Faika Dilek; Aksoy, Ayşegül; Department of Environmental Engineering (2015)
The by-product of wastewater treatment, sludge, is generated in tons everyday all around the world. As environmental regulations in Turkey are becoming stricter during the European Union adaptation period, the previously wide-spread disposal method of landfilling the sludge will not be applicable. Instead, dried sludge is expected to be used in revenue generating methods like land application or combustion. Combustion can be thought of as more beneficial as it uses sludge as an energy source. However, it is...
Modelling of nitrogen removal in Ankara wastewater treatment plant
Kim, Eun-Ah; Gökçay, Celal F.; Department of Environmental Engineering (2002)
Nowadays environmental legislations in many countries have all imposed strict effluent quality standards for carbon, nitrogen and phosphorous for wastewater treatment plants. This in turn caused complicated design, operation and control of biological treatment systems. As a result, computer programs based on complex mathematical models are now developed for the simulation of such complicated systems. The influent wastewater characterization based on COD and Nitrogen fractionation became very important in de...
The effects of aquifer heterogeneity on the natural attenuation rates of chlorinated solvents
Önkal, Başak; Ünlü, Kahraman; Department of Environmental Engineering (2005)
Monitored natural attenuation has been particularly used at sites where petroleum hydrocarbons and chlorinated solvents have contaminated soil and groundwater. One of the important aspects of the methodology that has been recognized recently is that the mass removal rates, the most important parameter to determine effectiveness of the methodology, is controlled by the groundwater flow regime and the aquifer heterogeneity. Considering this recognition, the primary objective of this study is to quantitatively...
Effects of pretreatment methods on solubilization of beet-pulp and bio-hydrogen production yield
Ozkan, Leyla; Bayramoğlu, Tuba Hande; DEMİRER, GÖKSEL NİYAZİ (2011-01-01)
Sugar processing wastewater and beet-pulp are two major waste streams of sugar-beet processing plants. Contrary to wastewater, beet-pulp is generally used as animal feed in cattle-raising industry. However, it can serve as a substrate for bio-hydrogen production which corresponds to a higher valorization of beet-pulp. Moreover, pretreatment of lignocellulosic materials like beet-pulp is needed in order to improve overall energy efficiency and enable economic feasibility of bio-hydrogen production. Therefore...
Influence of hydrothermal treatment on selenium emission -reduction and transformation from low -ranked coal
Ullah, Habib; Chen, Baoliang; Shahab, Asfandyar; Naseem, Faiza; Rashid, Audil; Lun, Lu; Yousaf, Balal; Khan, Sangar (2020-09-01)
One of the key environmental limitations in coal usage is selenium emission whose removal is focused in this study. We employed hydrothermal treatment to remove Se element and upgrade low rank Huainan coal at 200-300 degrees C. Pyrolysis temperature given during coal treatment was evaluated to simulate coal transformation into high-rank industrial grade by emphasizing O/C ratio, removal of oxygen functional groups and moisture and chemical structure stability. Following hydrothermal treatment, different cha...
Citation Formats
D. Samet, Z. Bozkuş, and A. E. Dinçer, “Effect of Pressure Relief Valves on the Fluid Transients in the Penstocks of a Small Run of River Plant,” presented at the 12th International Conference on Pressure Surges, Fluid Transients and Water Hammer, 18 - 20 Kasım 2015, Dublin, İrlanda, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/80765.