Browsing by Author "Kucukali, S."

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Citation - Scopus: 2
Flow and Turbulence Measurements in a Diagonal Brush Fish Pass: a Field Study
(Utah State University, 2018) Hassinger, R.; Verep, B.; Mutlu, T.; Ozelci, D.; Kucukali, S.
This study aims to investigate flow and turbulence structure of a diagonal brush fish passage which has been constructed at the existing Small Hydropower Plant (SHP) on İyidere River on the East Black Sea Coast of Turkey. The flow and turbulence characteristics of diagonal brush fish pass were investigated in a 1.1 m wide rectangular flume with a bed slope of 10% for Reynolds and Froude numbers ranging between 3.45x104-2.4x105 and 0.15-0.16, respectively. By taking into account dynamic upstream water levels (H=101.20 m to H=102.05 m) of fish pass structure throughout the year, the vertical velocity profiles of different flow regions have been obtained by using Nivus instrument, whereas the turbulence quantities were gathered by measuring the three-dimensional instantaneous velocity fields using Micro acoustic Doppler velocimeter. The flow data was grouped for four different relative submergence of bristles. Thus, the analysis is done based on a physical basis and focus on the most important hydraulic parameters of velocity field, turbulence, and flow depth for fish passage design. The main findings of this study can be summarized as follows: (i) a significant proportion of energy dissipation (>50%) takes place in the brush plates with the vibration and bending of bristles, (ii) turbulent kinetic energy seems to be considerably lower for a same dissipated power in brush fish pass than other conventional fish passes (vertical slot and nature type), (iii) the turbulence intensities in the lateral velocity component were an important contributor to turbulence, and (iv) when the bristles are submerged, the maximum turbulent kinetic energy value is tripled. The flow is quasi-uniform and in subcritical regime which provides different migration corridors with typical hydraulic conditions and, very important for the fish, these corridors continue through the complete fish pass. The results from this study would be useful to fish-pass designers. © 2018 7th IAHR International Symposium on Hydraulic Structures, ISHS. All rights reserved.
Citation - Scopus: 2
Wind Energy Development in Turkey: Policies and Challenges
(European Wind Energy Association, 2013) Kucukali, S.; Küçükali, Serhat; İnşaat Mühendisliği
This paper aims to explore the availability and potential of wind energy in Turkey as well as assessing related government policies and challenges. As a European Union (EU) candidate several incentives were developed in Turkey for electricity generation from renewable energy sources by the enactment of Law No. 5346 in 2005 which was later restructured by Law No. 6094 in 2010. By June 2012, 57 wind power plants in operation with a total installed capacity of 1776 MW; whereas there are 212 wind power plants are under construction with a total installed capacity of 7166 MW. Within the scope of the study a survey was conducted with experts in order to determine the main barriers for wind energy development. The survey results revealed that the grid connection and change of laws were considered as the most important risks for wind energy development in Turkey. The findings of the case studies demonstrated that the perception of inadequate understanding of the risks elements can lead to project schedule overrun which can result in significant revenue loss.