An experimental study of the optimal design parameters of a wind power tower used to improve the performance of vertical axis wind turbines

Abstract

In order to augment the performance of vertical axis wind turbines, wind power towers have been used because they increase the frontal area. Typically, the wind power tower is installed as a circular column around a vertical axis wind turbine because the vertical axis wind turbine should be operated in an omnidirectional wind. As a result, the performance of the vertical axis wind turbine depends on the design parameters of the wind power tower. An experimental study was conducted in a wind tunnel to investigate the optimal design parameters of the wind power tower. Three different sizes of guide walls were applied to test with various wind power tower design parameters. The tested vertical axis wind turbine consisted of three blades of the NACA0018 profile and its solidity was 0.5. In order to simulate the operation in omnidirectional winds, the wind power tower was fabricated to be rotated. The performance of the vertical axis wind turbine was severely varied depending on the azimuthal location of the wind power tower. Comparison of the performance of the vertical axis wind turbine was performed based on the power coefficient obtained by averaging for the one periodic azimuth angle. The optimal design parameters were estimated using the results obtained under equal experimental conditions. When the non-dimensional inner gap was 0.3, the performance of the vertical axis wind turbine was better than any other gaps.

Analisis Turbin Darrieus Tipe V-Shaped Blade Untuk Aplikasi Konverter Energi Arus Laut Menggunakan Software QBlade

“…Hal ini dikarenakan turbin sumbu vertikal menawarkan berbagai keunggulan seperti desain lebih sederhana, proses fabrikasi yang lebih mudah, dan biaya produksi yang rendah (Ahmad et al, 2020). Selain itu dari sisi teknis, VAT mampu mengonversi kecepatan fluida dari segala arah tanpa mekanisme yawing (Cho et al, 2018) dan mampu bekerja baik di lingkungan dengan turbulensi besar (Krishnaraj et al, 2019). Sistem elektrikal yang dapat diletakkan di permukaan juga menjadi kelebihan VAT lainnya dari sisi teknis (Qian et al, 2019).…”

Performance Investigation of a Humpback Whale-Inspired Vertical Axis Current Turbine

“…Furthermore, the local relative velocity (W) and angle of attack (α) for the upstream half cycle are given by: (4) (5) where θ is the blade azimuth angle and λ is the tip speed ratio (TSR) with the formula as follows: (6) for R is the turbine radius (m) and ω is the turbine angular speed (rad/s).…”

“…This turbine has various advantages: an uncomplicated design and an easy manufacturing process with low production costs [4]. From a technical point of view, VAT can convert fluid velocity from all directions without a yawing mechanism [5], can work properly in environments with high turbulence [6], and electrical components such as generators can be placed on the surface [7]. From the environmental point of view, the application of VAT is more friendly to fish migration because it is more easily identified by the fish's view, thereby reducing the risk of injury to fish due to being swept away by turbines [8].…”

Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm

“…For example, De Santoli et al 13 investigated a VAWT with a surrounding linear, convergent duct. Similarly, Cho et al 14,15 investigated both numerically and experimentally the design parameters of towers that could improve VAWT performance. For more details and examples, Wong et al 16 provide a good overview of the tried VAWT performance enhancements.…”