scholarly journals Efficient Direct-Drive Small-Scale Low-Speed Wind Turbine

ENERGYO ◽  
2018 ◽  
Author(s):  
Ravi Anant Kishore ◽  
Anthony Marin ◽  
Shashank Priya
Keyword(s):  
Wind Turbine ◽  
Small Scale ◽  
Direct Drive ◽  
Low Speed

Implementation of a Coreless Axial-Flux PM Generator for Vertical-Axial Wind Turbine

2013 ◽  
Vol 694-697 ◽  
pp. 3273-3278
Author(s):  
Zwe Lee Gaing ◽  
Guan Jie Wnag ◽  
Jui An Chiang
Keyword(s):  
Taguchi Method ◽  
Wind Turbine ◽  
Fuzzy Inference ◽  
Vertical Axis ◽  
Geometric Parameters ◽  
Small Scale ◽  
Direct Drive ◽  
Induced Voltage ◽  
Vertical Axis Wind Turbine ◽  
Axial Flux

In this paper, a rigorous and efficient approach, using the fuzzy-Inference Taguchi method with the multiple performance characteristics index (MPCI), is employed for obtaining the rigorous design of a small-scale direct-drive coreless axial-flux permanent-magnet (AFPM) generator for a vertical-axis wind turbine (VAWT) with both larger induced voltage and higher efficiency. The proposed method first establishes the orthogonal array (OA) recommended by the Taguchi method, then multiple targets are coordinated by the fuzzy inference mechanism to obtain a better combination of geometric parameters for achieving multiple quality targets. The three-dimensional (3-D) electromagnetic finite element method (FEM) is used as the tool for analyzing the performance of the coreless AFPM generator. The results have shown the proposed method can obtain the suitable generators geometric parameters for enhancing the induced voltage of the generator while keeping efficiency as high as possible under the rated speed.

scholarly journals Small-scale urban Venturi wind turbine: Direct-drive generator

2009 ◽  
Author(s):  
J.J.H. Paulides ◽  
L. Encica ◽  
J.W. Jansen ◽  
E.A. Lomonova ◽  
D. van Wijck
Keyword(s):  
Wind Turbine ◽  
Small Scale ◽  
Direct Drive

scholarly journals Efficient Direct-Drive Small-Scale Low-Speed Wind Turbine

2014 ◽  
Vol 1 (1-2) ◽  
Author(s):  
Ravi Anant Kishore ◽  
Anthony Marin ◽  
Shashank Priya
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Electrical Power ◽  
Ground Level ◽  
Maximum Efficiency ◽  
Small Scale ◽  
Portable Devices ◽  
Direct Drive ◽  
Horizontal Axis Wind Turbine ◽  
Wide Range

AbstractThere is growing need for the green, reliable, and cost-effective power solution for the expanding wireless microelectronic devices. In many scenarios, these needs can be met through a small-scale wind energy portable turbine (SWEPT) that operates near ground level where wind speed is of the order of few meters per second. SWEPT is a three-bladed, 40 cm rotor diameter, direct-drive, horizontal-axis wind turbine that has very low cut-in wind speed of 1.7 m/s. It operates in a wide range of wind speeds between 1.7 m/s and 10 m/s and produces rated power output of 1 W at wind speed of 4.0 m/s. The wind turbine is capable of producing electrical power up to 9.8 W at wind speed of 10 m/s. The maximum efficiency of SWEPT was found to be around 21% which makes it one of the most efficient wind turbines reported at the small scale and low wind speed. These advancements open many new opportunities for embedding and utilizing wireless and portable devices.

Investigations on the Effect of Aspect Ratio Into the Performance of Savonius Rotors

2013 ◽  
Author(s):  
Sukanta Roy ◽  
Ujjwal K. Saha
Keyword(s):  
Aspect Ratio ◽  
Wind Energy ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Maintenance Cost ◽  
Small Scale ◽  
Low Speed ◽  
Aspect Ratios ◽  
Gap Ratio ◽  
Overlap Ratio

With the rapid execution in the renewable energy field, vertical axis wind turbines are finding its application in the small-scale distributed wind energy generation, particularly in rural areas. The Savonius rotor is a drag based vertical axis wind turbine and is used as a small-scale wind energy converter with low installation and maintenance cost. These rotors are simple in design, easy to assemble and can be operated at low-speed wind from any direction. However, these rotors are not gaining popularity because of its low efficiency and improper design. The aspect ratio (height to diameter of the rotor) is one of the very important factors for designing a suitable small-scale wind turbine. The other important factors include overlap ratio, gap ratio and blade profile of the rotor. In the present investigation, a number of rotor models with different aspect ratios are tested in a low speed wind tunnel with open test section facility. The effects of overlap ratio and gap ratio are also studied keeping the rotor height to be the same. The wind speed is varied from 5–10 m/s. To estimate the performance of these rotors, electrical loads are given with respect to different wind speeds and the power output is calculated in terms of voltage and current. The results depicted an optimum aspect ratio of 0.80, which can be used to improve the performance of Savonius rotors.

scholarly journals Optimization of Small Scale Wind Turbine Blades for Low Speed Conditions

2015 ◽  
Vol 4 (2) ◽  
pp. 140-143 ◽  
Author(s):  
Mohammadreza Mohammadi ◽  
Alireza Mohammadi ◽  
Moona Mohammadi ◽  
Hamid Neisi Minaei
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Small Scale ◽  
Wind Turbine Blades ◽  
Low Speed

scholarly journals Canard optimization for enhancing the performance of small horizontal axis wind turbine at low wind speeds

2020 ◽  
Vol 37 ◽  
pp. 63-71
Author(s):  
Yui-Chuin Shiah ◽  
Chia Hsiang Chang ◽  
Yu-Jen Chen ◽  
Ankam Vinod Kumar Reddy
Keyword(s):  
Wind Turbine ◽  
Urban Areas ◽  
Horizontal Axis ◽  
Power Coefficient ◽  
Peak Performance ◽  
Small Scale ◽  
Horizontal Axis Wind Turbine ◽  
Wind Speeds ◽  
Optimum Parameters ◽  
Low Wind Speeds

ABSTRACT Generally, the environmental wind speeds in urban areas are relatively low due to clustered buildings. At low wind speeds, an aerodynamic stall occurs near the blade roots of a horizontal axis wind turbine (HAWT), leading to decay of the power coefficient. The research targets to design canards with optimal parameters for a small-scale HAWT system operated at variable rotational speeds. The design was to enhance the performance by delaying the aerodynamic stall near blade roots of the HAWT to be operated at low wind speeds. For the optimal design of canards, flow fields of the sample blades with and without canards were both simulated and compared with the experimental data. With the verification of our simulations, Taguchi analyses were performed to seek the optimum parameters of canards. This study revealed that the peak performance of the optimized canard system operated at 540 rpm might be improved by ∼35%.

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