Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Comparison of Linear and Cfd Models With On-Site Wind Measurement Data for Wind Resource Assessment(Izmir Institute of Technology, 2014) Ay, Aytek; Özerdem, Barış; Özerdem, Mehmet Bariş; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyWind resource assessment (WRA) estimates the strength of wind resources at a planned wind project site. The output of WRA is wind conditions and annual energy production at a wind project site. The aim of this study is to compare on-site measurements with a linear and non-linear flow model results by calculating the error values between and investigating the effects on the annual energy productions. Wind Atlas Analysis and Application Program (WAsP) is used for linear model approach, whilst software called WindSim is used for non-linear model approach based on computational fluid dynamics (CFD) concept. Relative and absolute wind speed errors which have been weighted with the frequency of the directions show that the CFD model gives better results. This non-linear model also leads in annual energy predictions with 1.8% relative error averaged over three met mast results which is 4.2% for linear model. Although non-linear results seem to be better in such a semi-complex site as a further study it is important to run several more test cases for sites with different complexity and stability conditions. The results of non-linear model have been obtained with a new post-processing tool created by Siemens Wind Power. It is also necessary to run the same calculation procedure for several more complex sites before using as a standard tool as this is the first test case of this calculation method.Master Thesis Wind Resource Assessment on the Campus Area of Izmir Institute of Tecnology: Use of Multi Point Data Sources(Izmir Institute of Technology, 2010) Ünveren, Çağdaş; Özerdem, Barış; Özerdem, Mehmet Barış; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyWind data which belong to the three different points on Izmir Institute of Technology campus area but has different time intervals have been used to evaluate the wind power potential on this area which has a complex terrain. The results showed that, this region has significant wind power potential and it is suitable for building a wind farm that has capacity factor over 42%. Mean wind speeds at station which has higher priority with 70 meters of height have been found 8.17 m/s at 50 m height and 8.63 m/s at 80 m height. The prevailing wind direction has also been found as north direction. WAsP and GH WindFarmer software have been used to evaluate the wind statistics and maximize the energy yield by taking into account of noise and visual constraints. Wind turbines which have 2500 kW nominal power have been microsited at the most efficient locations on the wind energy density map. Eighteen turbines with a total capacity of 45 MW were located on the selected sites. The estimated annual net energy productions of the wind turbines have been calculated as 167 GWh/year.