Oblikovanje majhne vetrne turbine

Končan, Urh (author), Sekavčnik, Mihael (mentor)

V tej nalogi obravnavamo osnove delovanja vetrnic in stanje na komercialnem trgu malih vetrnic. Ključno je, da bi vetrnice delovale tudi pri šibkem vetru, zato oblikujemo lastno zasnovo lopatic na podlagi razmerja med hitrostjo rotorja in vetra ali namenske vrtilne frekvence. Geometrijo lopatic določimo na osnovi želene kinematike toka ter lopatice izrišemo s 3D modelirnikom, skupaj s trikotniki hitrosti.. Za izbrano vetrnico smo izvedli tudi meritve v vetrovniku, kjer smo izmerili energijske in kinematične karakteristike ter na podlagi rezultatov predlagali izboljšano obliko lopatic.

• Language: Slovenian
• Keywords: vetrnica, energija, moč, lopatice, rotor, vpadni kot, trikotniki hitrosti, aeroprofil
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [U. Končan]
• Year: 2021
• Number of pages: XIV, 37 str.
• PID: 20.500.12556/RUL-130034
• UDC: 621.548.4:621.311.245(043.2)
• COBISS.SI-ID: 84333827
• Publication date in RUL: 10.09.2021

Secondary language

• Language: English
• Title: Design of a small wind turbine

Abstract

In this thesis, we examine the working principles of wind turbines and commercial market for small wind turbines. It is cruicial for the wind turbines to operate at low wind speeds, that is why we design our own wind turbine blades using tip speed ratio or predetermined rotational speed. We determine the blade geometry using desired flow kinematics and then 3D draw the blades along with velocity triangles. We made wind tunnel measurements on a small wind turbine, analyzing energy and kinematic characteristics and used the data to propose a better blade design.

• Keywords: wind turbine, energy, power, blades, rotor, angle of attack, velocity triangles, airfoil