Design and Experimentation of Darrieus Vertical Axis Wind Turbines

Design and Experimentation of Darrieus Vertical Axis Wind Turbines

Bibliographic Details
Main Author: Gonzalez Campos, Jose Alberto
Language:English
Published: Case Western Reserve University School of Graduate Studies / OhioLINK 2020
Subjects:
Energy
Mechanical Engineering
Fluid Dynamics
Engineering
Aerospace Engineering
Vertical Axis Wind Turbines - VAWT
Straight-Bladed
Helical-Bladed
Troposkien-Bladed
Darrieus Wind Turbines
MPPT Control
Wind Tunnel Experimentation
Blade Element Theory - BEM
Double Multiple Streamtube Model - DMST
Free-Vortex Wake Model - LLFVW
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=case1594690510943748
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-case15946905109437482021-08-03T07:15:41Z Design and Experimentation of Darrieus Vertical Axis Wind Turbines Gonzalez Campos, Jose Alberto Energy Mechanical Engineering Fluid Dynamics Engineering Aerospace Engineering Vertical Axis Wind Turbines - VAWT Straight-Bladed Helical-Bladed Troposkien-Bladed Darrieus Wind Turbines MPPT Control Wind Tunnel Experimentation Blade Element Theory - BEM Double Multiple Streamtube Model - DMST Free-Vortex Wake Model - LLFVW A comparative analysis has been performed for vertical-axis wind turbines, including the straight, troposkien, and helical-bladed Darrieus configurations, to assess their aerodynamic efficiency and real-power performance. The experimentation process included numerical modeling, CAD design, 3D printing-fabrication, and wind tunnel testing of lab-scale prototypes with a maximum power point tracking (MPPT) control scheme under different wind velocities. Implementing a double multiple streamtube (DMST) model, aided in the delimitation of non-dimensional parameters, where the local Reynolds numbers are between Re_b = 32,000 and 190,000, finding the ideal solidity value to be ς < 1.7 for low tip-speed ratio conditions, λ < 2.5. The optimum rotor swept areas are S = 0.048 m2 and 0.093 m2 with a maximum rotational speed around ω ≅ 1100 RPMs. At the designed conditions, the best wind tunnel results are obtained from the troposkien configuration (T-v1), with a Cp_opt = 0.218 at λ_opt = 2.25, followed by the straight-bladed (SB-v2) with a Cp_opt = 0.118 at λ_opt = 1.31 and helical-bladed (H45-v3) with Cp_opt = 0.082 at λ_opt = 0.99. The implementation of a free-vortex wake (LLFVW) method demonstrated the artificial increases in Cp (13-17%) and TSR (4-6%) due to wind tunnel blockage ratios between BR = 18% and 26% with turbine curvature ratios c/R > 0.5. Nonetheless, the power predictions for the vortex model are not consistent with real experimental data varying around |∆Cp| ≥ 30%, while the DMST deviates on average by |∆Cp| ≥ 25%. As such, the best strategy for small-scale wind turbine experimentation resides on wind tunnel tests, whereas basic aerodynamic models are mainly taken as tools for parameter selection and wake-flow visualization in the downstream region. 2020-09-07 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1594690510943748 http://rave.ohiolink.edu/etdc/view?acc_num=case1594690510943748 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Energy
Mechanical Engineering
Fluid Dynamics
Engineering
Aerospace Engineering
Vertical Axis Wind Turbines - VAWT
Straight-Bladed
Helical-Bladed
Troposkien-Bladed
Darrieus Wind Turbines
MPPT Control
Wind Tunnel Experimentation
Blade Element Theory - BEM
Double Multiple Streamtube Model - DMST
Free-Vortex Wake Model - LLFVW
spellingShingle Energy
Mechanical Engineering
Fluid Dynamics
Engineering
Aerospace Engineering
Vertical Axis Wind Turbines - VAWT
Straight-Bladed
Helical-Bladed
Troposkien-Bladed
Darrieus Wind Turbines
MPPT Control
Wind Tunnel Experimentation
Blade Element Theory - BEM
Double Multiple Streamtube Model - DMST
Free-Vortex Wake Model - LLFVW
Gonzalez Campos, Jose Alberto
Design and Experimentation of Darrieus Vertical Axis Wind Turbines
author Gonzalez Campos, Jose Alberto
author_facet Gonzalez Campos, Jose Alberto
author_sort Gonzalez Campos, Jose Alberto
title Design and Experimentation of Darrieus Vertical Axis Wind Turbines
title_short Design and Experimentation of Darrieus Vertical Axis Wind Turbines
title_full Design and Experimentation of Darrieus Vertical Axis Wind Turbines
title_fullStr Design and Experimentation of Darrieus Vertical Axis Wind Turbines
title_full_unstemmed Design and Experimentation of Darrieus Vertical Axis Wind Turbines
title_sort design and experimentation of darrieus vertical axis wind turbines
publisher Case Western Reserve University School of Graduate Studies / OhioLINK
publishDate 2020
url http://rave.ohiolink.edu/etdc/view?acc_num=case1594690510943748
work_keys_str_mv AT gonzalezcamposjosealberto designandexperimentationofdarrieusverticalaxiswindturbines
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