The design of a small lab-scale wind turbine model with high performance similarity to its utility-scale prototype

Li, B.; Zhou, Donghai; Wang, Y.; Shuai, Yong; Liu, Q.Z.; Cai, Weihua

doi:10.1016/j.renene.2019.12.060

Cited by 14 publications

(4 citation statements)

References 26 publications

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“…In the vibration signal analysis, the Bayesian FFT method was applied to identify the cross-wind fundamental frequency and damping ratio based on the measured displacement response (Li et al, 2019). The predicted results of fundamental frequencies based on equations (29) and (30) are compared with those obtained from tests to evaluate the accuracy of the analytical model, as listed in Table 4.…”

Section: Test Results and Discussionmentioning

confidence: 99%

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Cross-wind dynamic response of concrete-filled double-skin wind turbine towers: Theoretical modelling and experimental investigation

Li,

Zhang,

Zhou

et al. 2023

Journal of Vibration and Control

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Wind turbine towers are growing taller to obtain larger thrust load and capture more wind energy at higher elevations. To address the excessive vibration problem of conventional steel tube (ST) towers, a concrete-filled double-skin tubular (CFDST) tower can be a great alternative owing to the advantages of excellent mechanical properties and cost efficiency, especially for tall and slender wind turbines. This paper developed a theoretical model of the CFDST-based wind turbine system by combining the Lagrangian method with the Galerkin method. Subsequently, the analytical solutions of both fundamental frequency and cross-wind displacement response were obtained. The wind tunnel tests of scaled CFDST and ST wind turbine systems, with variations in hollow ratio, tube length, and wind speed, were used to verify the proposed model. The predicted results from the analytical model showed reasonable agreement with the test results. Finally, the validated analytical solutions were employed to further analyze the influence of hollow ratio, length-to-diameter ratio, and tip-mass ratio. This study makes a contribution to the integration analysis of the CFDST-based wind turbine system in theory and experiment, and develops a simplified method to predict its dynamic behavior.

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Section: Test Results and Discussionmentioning

confidence: 99%

“…In order to realize the aerodynamic characteristics of the wind turbine system prototype accurately, the geometrical similarity, kinematic similarity, and dynamic similarity should be met (Li et al, 2020) as follows:…”

Section: Experimental Programmentioning

confidence: 99%

Cross-wind dynamic response of concrete-filled double-skin wind turbine towers: Theoretical modelling and experimental investigation

Li,

Zhang,

Zhou

et al. 2023

Journal of Vibration and Control

View full text Add to dashboard Cite

show abstract

“…Note that a current lab-scale wind turbine model was designed to study its wind turbine aerodynamics generated in the wind tunnel. Therefore, scaling of utility-scale wind turbine rotor in reality is not considered (Li et al, 2020). One is the small-scale wind turbine model designed for performance testing as shown in Figure 3.…”

Section: Experimental Set-up and Small-scale Wind Turbine Modelmentioning

confidence: 99%

A wind tunnel investigation of yawed wind turbine wake impacts on downwind wind turbine performances and wind loads

et al. 2023

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In the current work we experimentally explored yawed wind turbine wake impacts on downwind wind turbine performances and wind loads. The lab-scale wind turbine model with a rotor diameter ( D) of 0.442 m and a height of 1 m (=2.26 D) was installed in a closed-circuit boundary layer wind tunnel (test section: 15 m long × 3.6 m wide × 2.0 m high) of the Research Institute for Applied Mechanics (RIAM) of Kyushu University. Power performance tests were initially conducted with a single rotor in isolation in order to characterize a rotor’s power output in stand-alone conditions. A detailed comparison of the tests revealed that the power output decreased rapidly as the yaw angle (γ) increased. It is presumed that the power output decrease in yawed cases is mainly due to the decrease in the effective rotor area and the change in the angle of the incoming wind flow with respect to the wind turbine blade. Next, using two wind turbine models aligned with the dominant inflow direction, the merging wakes behaviors caused by three different lateral separation distances were tested: (a) Case 1 ( y = 0), (b) Case 2 ( y = 0.5 D), and (c) Case 3 ( y = 1 D). Here, the separation distance between the two wind turbine models was fixed at 6 D in all cases. Extremely large power output deficits of 46%–76% were seen in the Case 1 configuration. This is mainly due to the significant wake velocity deficits induced by the upwind wind turbine model. In the Case 2 configuration with γ values of 20° and 30°, a significant increase in the power output of the downwind wind turbines was observed. Similar to Case 1 configuration, these results are considered to be mainly due to the upwind turbine-induced wake velocity deficits and wake deflection. Finally, in the Case 3 configuration, no significant difference was found in all of the results, and the tendency was almost the same. We show that the wake velocity deficits induced by the upwind wind turbine model had almost no effect on the power output of the downwind wind turbine model. We evaluated the total power output of the two turbines. As a result, in the Case 2 configuration with 20° yaw angle, the total power output of the two wind turbine models was the highest due to the increase in the power output of the downwind wind turbine model. In order to investigate the main cause of the significant increase in the power output of the downwind wind turbine model at 20° and 30° yaw angles in the Case 2 configuration, we measured the lateral wind speed distribution at the 6 D position on the downwind side of the upwind wind turbine model by using the ultrasonic anemometer. As a results, it was clarified that the peak of the wake velocity deficits induced by the upwind wind turbine model is clearly shifted away from the downwind turbine such that it experiences a smaller deficit due to wake steering. Also, with wake steering the upwind turbine-induced wake velocity deficits may be smaller due to the reduction in rotor area. Finally, it is extremely important to understand the wind load acting on the downwind wind turbine model operating within the wake region induced by the upwind yawed wind turbine model when the maximum power output is generated. It can be seen that as the yaw angle of the upwind wind turbine model increased, the power output generated by the downwind wind turbine model and the streamwise wind load acting on it also increased. However, it was also clarified that the streamwise wind load acting on the downwind wind turbine model in this situation did not exceed the stand-alone value.

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“…Turbin angin seperti ini hanya dapat menghasilkan energi sekitar 50 Watt, dan bisa digunakan untuk konsumsi listrik alat-alat kecil saja, seperti lampu dan lain sebagainya [10]. Prihal instalasi turbin angin ini perlu dipasang dengan ketinggian minimal 9 meter lebih tinggi dari gedung sekitarnya dalam radius 152 meter [11]. Hal ini merupakan masalah, sebab akan dipasang di areal pemukiman padat penduduk.…”

Section: Potensi Penggunaan Pembangkit Listrik Tenaga Bayu (Pltb) DI Desa Lendang Nangkaunclassified

Potensi Penerapan Energi Terbarukan Sebagai Upaya Mewujudkan Kemandirian Desa: Studi Kasus Desa Lendang Nangka Lombok Timur

Amrullah¹

2021

energi

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Desa saat ini didorong menjadi desa mandiri, baik dalam bidang energi maupun ekonomi dengan mengimplementasikan energi terbarukan untuk meningkatkan kemandirian energi sebagai salah satu langkah meningkatkan ekonomi masyarakat. Penelitian ini bertujuan untuk menganalisis potensi penggunaan energi terbarukan seperti Pembangkit Listrik Tenaga Bayu (PLTB), Pembangkit Listrik Tenaga Surya (PLTS), Pembangkit Listrik Tenaga Air (PLTA), dan Konversi Energi Gasifikasi di desa Lendang Nangka, Kabupaten Lombok Timur. Penelitian dilakukan dengan pengumpulan data baik dari BMKG dan pengujian secara langsung menggunakan alat Air Flow Anemometer GM8902 untuk mengetahui kecepatan angin dan DIGITAL TECHNOMETER LX-1010B untuk mengetahui intensitas cahaya matahari. Selain itu dilakukan wawancara kepada pengusaha kecil dan menengah untuk mengetahui penggunaan energi dalam menyokong proses produksinya. Hasil dari penelitian menunjukkan bahwa potensi PLTB yang dapat diemplementasikan adalah PLTB sekala kecil dengan daya sekitar 23,4-632,88 kWh/turbin. Untuk potensi PLTS menghasilkan daya sebesar 410-566 kWh per meter persegi panel surya. Untuk potensi PLTA, turbin yang cocok adalah turbin ukuran kecil dengan potensi daya sekitar 0,3024-2,2194 kWh. Sedangkan untuk potensi penggunaan converter energi jenis gasifikasi dapat dilakukan untuk mengurangi penggunaan bahan bakar tidak terbarukan sekaligus menghemat biaya porduksi. Sebab, nilai High Heating Value gas sintetik yang dihasilkan 1,7 kali lebih besar daripada pembakaran langsung dengan kayu.

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The design of a small lab-scale wind turbine model with high performance similarity to its utility-scale prototype

Cited by 14 publications

References 26 publications

Cross-wind dynamic response of concrete-filled double-skin wind turbine towers: Theoretical modelling and experimental investigation

Cross-wind dynamic response of concrete-filled double-skin wind turbine towers: Theoretical modelling and experimental investigation

A wind tunnel investigation of yawed wind turbine wake impacts on downwind wind turbine performances and wind loads

Potensi Penerapan Energi Terbarukan Sebagai Upaya Mewujudkan Kemandirian Desa: Studi Kasus Desa Lendang Nangka Lombok Timur

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