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Title:
Uporaba BEM metode za izračun izkoristka vetrne turbine
Authors:
ID
Smrekar, Miha
(Author)
ID
Fike, Matej
(Mentor)
More about this mentor...
ID
Predin, Andrej
(Comentor)
Files:
UN_Smrekar_Miha_2019.pdf
(5,15 MB)
MD5: A0FF88B92BE84E8E2675EEA518A4C83B
PID:
20.500.12556/dkum/0db9b931-735f-4461-a635-1b039d331947
Language:
Slovenian
Work type:
Bachelor thesis/paper
Typology:
2.11 - Undergraduate Thesis
Organization:
FE - Faculty of Energy Technology
Abstract:
Teorija gibalne količine elementov lopatice (angl. Blade Element Momentum Theory – BEM) je analitična metoda, ki se uporablja za izračun karakterističnih sil, ki delujejo na vetrno turbino ali propeler. V diplomski nalogi smo zbrali teorijo analitičnega izračuna z metodo BEM, izdelali program za analizo vetrne turbine ter ovrednotili analitične rezultate. Za izračun smo uporabili model trolopatične vetrne turbine s polmerom 0,45 m in aerodinamičnim profilom NREL S826. Ugotovili smo, da je potrebno za kvaliteten izračun z BEM metodo uporabiti popravke BEM metode in izvedli smo preračun z uporabo popravkov za visoke vrednosti indukcijskega faktorja, popravkov rotacijske augmentacije ter popravkov izgub na vrhu in ob vznožju lopatice. Z optimizacijsko metodo algoritma diferencialne evolucije smo prikazali postopek optimizacije vetrne turbine v obratovalni točki razmerja hitrosti vrha lopatice λ=5,89. Najvišji izračunani izkoristek optimizirane geometrije je dosegel 12 % višji izkoristek od izračunanega izkoristka osnovne geometrije, slabost optimizirane geometrije pa je bila večja sila upora na vetrnico v primerjavi z osnovno geometrijo.
Keywords:
vetrna energija
,
vetrne elektrarne
,
BEM
Place of publishing:
Krško
Publisher:
[M. Smrekar]
Year of publishing:
2019
PID:
20.500.12556/DKUM-74287
UDC:
621.311.245:004.42(043.2)
COBISS.SI-ID:
1024360028
NUK URN:
URN:SI:UM:DK:QMA6OKOZ
Publication date in DKUM:
21.10.2019
Views:
1872
Downloads:
224
Metadata:
Categories:
FE
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:
SMREKAR, Miha, 2019,
Uporaba BEM metode za izračun izkoristka vetrne turbine
[online]. Bachelor’s thesis. Krško : M. Smrekar. [Accessed 4 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=74287
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Licences
License:
CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:
The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:
21.08.2019
Secondary language
Language:
English
Title:
Application of the BEM method for wind turbine efficiency calculation
Abstract:
The BEM (Blade Element Momentum Theory) method is an analytical method used to calculate the characteristic forces acting on a wind turbine or propeller. In the thesis we collected the theory of analytical calculation using the BEM method, designed a program for the analysis of wind turbines and evaluated the analytical results. For the calculation, we used a model of a three-blade wind turbine with a radius of 0.45 m and the aerodynamic profile NREL S826. We found that BEM method corrections were necessary for accurate calculations using the BEM method, and a calculation was made using high induction factor corrections, rotational augmentation corrections, and corrections for losses at the top and bottom of the blade. With the optimization method of the differential evolution algorithm, we have shown the process of optimization of the wind turbine at the operating point of the tip-speed ratio λ = 5,89. The highest calculated efficiency of the optimized geometry reached a 12% higher efficiency than the calculated efficiency of the basic geometry, but the disadvantage of the optimized geometry was a greater force of air resistance on the windmill, in comparison to the original geometry.
Keywords:
Wind Energy
,
Wind Turbines
,
BEM Theory
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