• Semester 5, position 5

Throughout this course student will learn about the principles, components and design of wind turbines, as well as regulation and dynamic balancing of the system. Acquiring the knowledge necessary for wind turbine blade design based on the aerodynamic and structural criteria, performance computation (power, coefficient of power, torque, aerodynamic characteristics of blades), calculation based on similarity theory and the topology definition of wind energy systems is the main aim of the subject.

Mastering the curriculum the student receives the following subject-specific skills: -thorough knowledge and understanding of different concepts of wind turbines and design methods; - skills needed for wind turbine and its parts selection according to given operating conditions using scientific methods and procedures; - integration of fundamental knowledge in mathematics, programming, mechanics and fluid mechanics and application to design and calculations of wind turbines;

- Introduction to wind energy; - Historical overview of wind turbines; - Components of wind turbines – analysis and design of rudimentary assemblies; - Wind characteristics - Dimensioning of wind turbine blades – Betz theory, aerodynamic forces on rotating blades, the losses; - Calculation of characteristics; -Structure and blade load; - wind turbines similarity theory- application and limitations; - pumps driven by wind- possibilities of application, types, coupling of wind turbines and pumps, sizing; -wind turbine electrical system- main concepts, types of generators, accumulation of electrical energy, systems connected to public grid, losses in energy transmission system; - Regulation of wind turbines; - The dynamics of wind turbines - the oscillations in the system, modeling of oscillations; - Off-shore wind turbines - requirements, types of off-shore wind turbines, foundations and structure of the types of off-shore wind farms, maintenance - The construction of wind turbines

- Presentation of various wind turbine designs - Basic parts of the system - Devices for the wind speed measurements - anemometers - Dimensioning of the blades - a numerical simulation of the flow around airfoils and blades dimensioning - Performance calculations - the development and application of existing software for the calculation of characteristics of wind turbines - Analysis of the stress - strain state of turbine rotor blades - Static testing of blades - Dynamic testing of blades - Configuration of wind energy systems

There are not any compulsory conditions for course attendance.

1. Additional materials (written performed with the lectures, setting tasks, guidelines for solving the task), DVL 2. 452, Computer Laboratory SimLab, ICT / CAH / KLR 3. FORTRAN, Computer Laboratory SimLab, ICT / PPO

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 10
Laboratory exercises: 12
Calculation tasks: 0
Seminar paper: 8
Project: 0
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 2
Review and grading of seminar papers: 4
Review and grading of the project: 0
Test: 4
Test: 0
Final exam: 5

Activity during lectures: 10
Test/test: 15
Laboratory practice: 15
Calculation tasks: 15
Seminar paper: 15
Project: 0
Final exam: 30
Requirement for taking the exam (required number of points): 30

1. Pesic S., Wind energy - Aerodynamics wind energy system with a horizontal axis rotor, Faculty of Mechanical Engineering, 1994., KDA(in serbian); 2. Petrović Ž. Stupar S., Computer design, Faculty of Mechanical Engineering, 1992, KPN(in serbian)