Browsing by Author "Küçükali, Serhat"

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Adaptive Decision Fusion Based Framework for Short-Term Wind Speed and Turbulence Intensity Forecasting: Case Study for North West of Turkey
(2017) Toreyin, Behcet Ugur; Dinçkal, Çiğdem; Küçükali, Serhat; 20413; 26773; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi; 06.03. Elektrik-Elektronik Mühendisliği
:In this paper, an online learning framework called adaptive decision fusion (ADF) is employed for short-term wind speed and turbulence intensity forecasting by use of wind speed data for each season for the city of ˙Izmit, located in the northwest of Turkey. Fixed-weight (FW) linear combination is derived and used for comparison with ADF. Wind speeds and turbulence intensities are predicted from the existing wind speed data and computed turbulence intensities, respectively, using the ADF and FW methods. Simulations are carried out for each season and the results are tested on mean absolute percentage error criterion. It is shown that the proposed model captured the system dynamic behavior and made accurate predictions based on the seasonal wind speed characteristics of the site. The procedure described here can be used to estimate the local velocity and turbulence intensity in a wind power plant during a storm.
An investigation of the hydrodynamic and fish behavior characteristics of the brush-type fish passage: Iyidere (Turkey) field study
(2017) Küçükali, Serhat; 20413; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
Biogas Energy in Turkey: Current Situation, Sustainability and Policy Implications, Energy Science and Technology
(2014) Bölük, G.; Küçükali, Serhat; 20413; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
Brush-baffle fish pass: a continuous migration corridor for fish
(2016) Küçükali, Serhat; 20413; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
Ecological Assessment: Use of Hydropower and Biogas Energy in Waste Water Treatment Plants
(CRC Press, 2018) Küçükali, Serhat; Ar, I. İrfan; Ak, Mümtaz; Günal, Asiye; 20413; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
Flow structure and fish passage performance of a brush-type fish way: a field study in the yidere River, Turkey
(Csiro Publishing, 2019) Küçükali, Serhat; Verep, Bülent; Alp, Ahmet; Turan, Davut; Mutlu, Tanju; Kaya, Cüneyt; Yıldırım, Yasin; Töreyin, Behçet Uğur; Özelçi, Dursun; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
The fish passage performance and flow structure of a brush fish pass were investigated at the ncirli Small Hydropower Plant on the yidere River, located in the East Black Sea region of Turkey. The spatial distributions of velocity vectors, power velocity, Froude number and turbulent kinetic energy are presented. The flow is quasi-uniform and subcritical, which provides different migration corridors with favourable hydraulic conditions; importantly for the fish, these corridors continue through the complete fish pass. The flow-bristle interaction creates a reduced velocity and low-turbulence resting zones. In addition, the passage efficiency of the brush fish pass was assessed using passive integrated transponder telemetry. The results clearly showed that upstream passage efficiency differs between fish species: Salmo coruhensis performed better than Alburnoides fasciatus on the same fish passage. The passage efficiency for the target fish species S. coruhensis was calculated to be 82.4%. The data revealed that the brush fish passage provides passage for small-bodied fish (total body length <15 cm) in a high-gradient channel with a slope of 10%. The monitoring data revealed that bristles as flexible hydraulic elements are beneficial for migrating fish.
The implementation of the european union (EU) water framework directive impact on small hydropower plants: situation in Turkey
(2014) Küçükali, Serhat; 20413; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
Citation - Scopus: 2
Wind Energy Development in Turkey: Policies and Challenges
(European Wind Energy Association, 2013) Kucukali, S.; Küçükali, Serhat; 20413; İnşaat Mühendisliği; 06.05. İnşaat Mühendisliği; 06. Mühendislik Fakültesi; 01. Çankaya Üniversitesi
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.