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Author: search.filters.author.Sudsanguan, Anan

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    Numerical Investigation of Diffuser-Shaped Vortex Generators with Semi-Open Angles on Cylindrical Towers
    (2025-01-01)
    Sudsanguan, Anan
    ;
    Boonloi, Amnart
    ;
    Jedsadaratanachai, Withada
    This study presents a numerical investigation into the flow configurations and pressure distribution of cylindrical towers equipped with various vortex generators. The primary objective is to reduce the energy consumption of ventilation in these towers. Different diffuser-shaped vortex generators with semi-open angles are compared to determine the optimal angle for generating an upward suction draft. The study also examines the effects of air velocity and vortex generator size on flow configuration. The finite element method, implemented through commercial software, is employed to solve the main problem. The numerical results reveal that the suction draft speed within the tower is directly proportional to the crosswind speed. The diffuser-shaped vortex generator with a height equivalent to 2D provides the most effective ventilation. Furthermore, a semi-open angle of 8° proves to be the most suitable for cylindrical towers, with increasing semi-open angles resulting in enhanced updraft wind speeds.
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    Three-Direction Type of Diffuser-Shaped Vortex Generator Development for the Wind Solar Tower
    (2025-01-01)
    Sudsanguan, Anan
    ;
    Boonloi, Amnart
    ;
    Jedsadaratanachai, Withada
    This study explored the use of diffuser shapes to enhance the performance of a solar updraft tower. A diffuser-shaped vortex generator, a simple device requiring no structural modifications to the tower, was installed at the chimney outlet. The generator transformed crosswind into a vortex, increasing the updraft velocity. This study employed finite element methods and numerical models to validate the results alongside physical experiments. Both approaches focused on the crosswind velocity and vortex generator height to determine an optimal semi-opening angle for the diffuser shape. The experimental results revealed that an 8° diffuser-shaped vortex generator with a height of h<inf>vg</inf> = 2D achieved the greatest updraft enhancement, increasing the speed by 86.89% compared to the prototype tower. The enhancement was found to increase proportionally with the generator’s angle and height.
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    Crosswind and Vortex Usages for Electricity Production Enhancement of Solar Updraft Tower
    (2024-01-01)
    Boonloi, Amnart
    ;
    Sudsanguan, Anan
    ;
    Jedsadaratanachai, Withada
    This research presents an improvement to the traditional solar updraft tower, which relies solely on solar energy and cannot operate continuously throughout the day. The enhancement involves a hybrid energy approach by installing a vortex generator at the top of the tower to convert crosswinds into a vortex flow at the chimney’s top. This modification induces an updraft within the tower, enabling it to generate electricity continuously, even at night when there is no sunlight. The aim is to enable the solar updraft tower to harness crosswind energy without altering the tower’s main structure. This involves developing a vortex generator from a unidirectional wind intake design to a three-directional intake, enhancing the feasibility of commercial installation. Additionally, various designs and heights of vortex generators were developed, considering different crosswind speeds (2, 4, 6, and 8 m/s). The research utilizes the finite element method, along with real model construction, to validate the reliability of the study’s findings. The results indicate that the updraft speed is directly proportional to the crosswind speed. From a physical standpoint, the vortex generator with a height equal to D produced the best results in all experiments. The square, cylindrical, and diffuser shapes increased the wind speed inside the chimney by 60%, 41%, and 48%, respectively. These results from various shapes provide effective design and development guidelines for the future commercial use of vortex generators.