scholarly journals Wind power of small wind turbines in turbulent open jets

2012 ◽  
Vol 19 (2) ◽  
pp. 272-281 ◽  
Author(s):  
A. Sedaghat ◽  
X. Liu ◽  
J. Whitty ◽  
X. Tang
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Small Wind Turbines

scholarly journals Optimization of Power and Levelized Cost for Shrouded Small Wind Turbine

Inventions ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 59
Author(s):  
Hasanali Khojasteh ◽  
Younes Noorollahi ◽  
Mojtaba Tahani ◽  
Mehran Masdari
Keyword(s):  
Wind Energy ◽  
Objective Function ◽  
Wind Power ◽  
Wind Turbines ◽  
Power Plants ◽  
Large Scale ◽  
Renewable Energies ◽  
Levelized Cost ◽  
Small Wind Turbines ◽  
Input Parameters

Nowadays, by increasing energy demand and considering the importance of environmental issues in recent decades, the use of renewable energies is expanding. Among renewable energies, wind power and its technology are growing and evolving more rapidly. Resource assessment in Iran has revealed the significant potential of wind energy around the country. To further develop wind energy in the country and create large-scale wind power plants, the consideration of distributed power generation using small wind turbines for applications in agricultural and residential use is needed. Conventional small wind turbines and small wind lens turbines have been developed in recent years. In this research project, a small wind lens turbine is designed. The advantages of this turbine are an increased production capacity and reduced cut-in speed and noise pollution. In this study, a lens (or shroud) is added to a small turbine, and the maximized annual energy production (AEP) and minimization of the levelized cost of energy (LCOE) are modeled. We applied the NSGA-II algorithm for optimization to find the best answer. The input parameters in the objective function of the AEP are cut-in, cut-out, rated speeds, scale factor, and shape factor. Additionally, the input parameters in the objective function of the LCOE are the power production, initial capital cost, annual operating expenses, and balance of energy. The results indicate that installing a wind lens turbine in Kish Island led to an LCOE decrease of 56% on average, and we can see an 83% increase in the AEP. In the Firoozkooh area, an average reduction of 59% in the LCOE and 74% increase in the AEP for a wind lens turbine is observed.

Small wind turbines – A unique segment of the wind power market

2013 ◽  
Vol 50 ◽  
pp. 1027-1036 ◽  
Author(s):  
Zdenko Simic ◽  
Juraj George Havelka ◽  
Maja Bozicevic Vrhovcak
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Power Market ◽  
Small Wind Turbines

scholarly journals Performance of small wind turbines: simulation of electricity supply to loads connected to the public or isolated grid

2016 ◽  
Vol 36 (2) ◽  
pp. 281-290 ◽  
Author(s):  
Rafael V. Rodrigues ◽  
Luiz A. Rossi
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Computer Software ◽  
Electrical Load ◽  
The Public ◽  
Small Wind Turbines ◽  
National Model ◽  
Wind Power System ◽  
Wind Resource ◽  
Wind Resources

ABSTRACT The successful in the implementation of wind turbines depends on several factors, including: the wind resource at the installation site, the equipment used, project acquisition and operational costs. In this paper, the production of electricity from two small wind turbines was compared through simulation using the computer software HOMER - a national model of 6kW and an imported one of 5kW. The wind resources in three different cities were considered: Campinas (SP/BR), Cubatão (São Paulo/BR) and Roscoe (Texas/ USA). A wind power system connected to the grid and a wind isolated system - batteries were evaluated. The results showed that the energy cost ($/kWh) is strongly dependent on the windmill characteristics and local wind resource. Regarding the isolated wind system – batteries, the full supply guarantee to the simulated electrical load is only achieved with a battery bank with many units and high number of wind turbines, due to the intermittency of wind power.

scholarly journals An Evaluation of Flicker Emissions from Small Wind Turbines

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7263
Author(s):  
Junji Kondoh ◽  
Daisuke Kodaira
Keyword(s):  
Wind Power ◽  
Output Power ◽  
Wind Turbines ◽  
Distribution System ◽  
Low Voltage ◽  
Total Power ◽  
Total Output ◽  
Voltage Quality ◽  
Small Wind Turbines ◽  
Power Generation Systems

It is well known that the output power from small wind turbines (SWTs) fluctuates noticeably more when compared to that from other types of dispersed generators, such as residential photovoltaic (PV) power generation systems. Thus, the degradation of voltage quality, such as flicker emissions, when numerous SWTs are installed in a low-voltage distribution system is a particular concern. Nevertheless, practical examples of flicker emissions from small wind power facilities have not been made public. This paper aims to clarify the characteristics of flicker emissions by SWTs and their severity. The measurement results at the two selected sites indicate that the flicker emissions solely caused by variable-speed SWTs with a total power rating of ~20 kW are notably lower than the upper limit, and they are at their highest when the mean total output power is approximately 3/4 of the total power rating of small wind power facilities.

scholarly journals Systematic Investigation of Integrating Small Wind Turbines into Power Supply for Hydrocarbon Production

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3243
Author(s):  
Zi Lin ◽  
Xiaolei Liu ◽  
Ziming Feng
Keyword(s):  
Wind Energy ◽  
Wind Power ◽  
Wind Turbines ◽  
Meteorological Data ◽  
Oil Production ◽  
Economic Feasibility ◽  
Offshore Wind ◽  
Levelized Cost Of Electricity ◽  
Small Wind Turbines ◽  
Power Curves

In this paper, the technical and economic feasibility of integrating SWTs (Small Wind Turbines) into remote oil production sites are investigated. Compared to large turbines in onshore and offshore wind farms, SWTs are more suitable for individual power generations. A comprehensive approach based on wind energy assessment, wind power prediction, and economic analysis is then recommended, to evaluate how, where, and when small wind production recovery is achievable in oilfields. Firstly, wind resource in oilfields is critically assessed based on recorded meteorological data. Then, the wind power potential is numerically tested using specified wind turbines with density-corrected power curves. Later, estimations of annual costs and energy-saving are carried out before and after the installation of SWT via the LCOE (Levelized Cost of Electricity) and the EROI (Energy Return on Investment). The proposed methodology was tested against the Daqing oilfield, which is the largest onshore oilfield in China. The results suggested that over 80% of the original annual costs in oil production could be saved through the integrations between wind energy and oil production.

EXPERIMENTAL AND ANALYTICAL STUDIES OF VERTICAL AXIS WIND TURBINES

2018 ◽  
pp. 51-58
Author(s):  
B. P. Khozyainov
Keyword(s):  
Wind Turbine ◽  
Flow Velocity ◽  
Wind Power ◽  
Wind Turbines ◽  
Power Efficiency ◽  
Air Flow ◽  
Geometrical Parameters ◽  
Wind Speeds ◽  
Analytical Studies ◽  
Air Flow Velocity

The article carries out the experimental and analytical studies of three-blade wind power installation and gives the technique for measurements of angular rate of wind turbine rotation depending on the wind speeds, the rotating moment and its power. We have made the comparison of the calculation results according to the formulas offered with the indicators of the wind turbine tests executed in natural conditions. The tests were carried out at wind speeds from 0.709 m/s to 6.427 m/s. The wind power efficiency (WPE) for ideal traditional installation is known to be 0.45. According to the analytical calculations, wind power efficiency of the wind turbine with 3-bladed and 6 wind guide screens at wind speedsfrom 0.709 to 6.427 is equal to 0.317, and in the range of speed from 0.709 to 4.5 m/s – 0.351, but the experimental coefficient is much higher. The analysis of WPE variations shows that the work with the wind guide screens at insignificant average air flow velocity during the set period of time appears to be more effective, than the work without them. If the air flow velocity increases, the wind power efficiency gradually decreases. Such a good fit between experimental data and analytical calculations is confirmed by comparison of F-test design criterion with its tabular values. In the design of wind turbines, it allows determining the wind turbine power, setting the geometrical parameters and mass of all details for their efficient performance.

Development of a Quality Management System for Electric Power applied to Small Wind Turbines

2012 ◽  
pp. 1083-1088
Author(s):  
O.H. Ando Junior ◽  
M.O. Oliveira ◽  
J.M. Neto ◽  
A.D. Spacek ◽  
R.C.B. Leborgne ◽  
...  
Keyword(s):  
Quality Management ◽  
Electric Power ◽  
Wind Turbines ◽  
Management System ◽  
Quality Management System ◽  
Small Wind Turbines

COMPARATIVE ANALYSIS OF TWO AIRFOILS FOR POSSIBLE UTILIZATION IN SMALL WIND TURBINES

2019 ◽  
Author(s):  
Pedro Baracat ◽  
Célia Rosolen ◽  
Raquel Miguez de Carvalho ◽  
Kamal Ismail ◽  
Willian Okita ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Wind Turbines ◽  
Small Wind Turbines
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