China
Africa
Explore chapters and articles related to this topic
Introduction
Published in Dorothy Gerring, Renewable Energy Systems for Building Designers, 2023
Wind power converts the kinetic energy of the wind into electricity by spinning blades to turn the turbine and generator. This power was historically used to pump water and grind grains. Wind turbines can be large, utility scale generators that have a swept area of the blades over 200’ in diameter, can be almost 400’ tall, and are rated over 1 megawatt. These large utility turbines can power large communities. Smaller turbines can be used to power just one household. Figure 1.20 shows a small pole mounted wind turbine with three blades and a tail. Wind turbines need to be located where there are good wind conditions and be located above or away from turbulence, typically away from buildings and other obstructions. Production depends on the quality and strength of the wind. There are many locations where there isn’t enough wind to warrant installation of a turbine. Depending on the type of turbine, efficiencies for energy production range from as low as 5% to as high as 40%.
Energy and Environment
Published in T.M. Aggarwal, Environmental Control in Thermal Power Plants, 2021
Air flow through wind turbines or sails can produce significant mechanical power. Windmills are used for their mechanical power, windpumps for water pumping, and sails to propel ships, but the most frequent current use is to turn a generator for electrical power. Wind power, as an alternative to burning fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation, and uses little land.[2] The net effects on the environment are far less problematic than those of nonrenewable power sources.
Electricity and Transportation Markets
Published in Anco S. Blazev, Global Energy Market Trends, 2021
A wind turbine is the basic device used to converts wind’s kinetic energy into mechanical and then electric energy; a process known as wind power. If the mechanical energy is used to produce electricity, the device may be called wind turbine or wind power plant. If the mechanical energy is used to drive machinery, such as for grinding grain or pumping water, the device is called a windmill or wind pump.
Combined Emission Economic Load Dispatch with Renewable Energy Sources Employing Hybrid Statistical Multiswarm Particle Swarm Optimizer-Sine Cosine Algorithm
Published in Electric Power Components and Systems, 2023
Rinki Keswani, Harish Kumar Verma, Shailendra Kumar Sharma
Wind power is a sustainable, viable and economical source of power. However, wind power depends on wind speed and is stochastic in nature. Therefore, the generated wind power also becomes uncertain and various probabilistic methods are used for its forecast. The output power generated by wind power plant is given in Eqs. (24) [31] as: where is the rated output power of the wind power plant, is the rated wind velocity, is the predicted wind velocity, is the cut-in wind velocity and is the cutout wind velocity.
An overview of blade materials and technologies for hydrokinetic turbine application
Published in International Journal of Green Energy, 2023
Muhamad Hasfanizam Mat Yazik, Chang Wei Shyang, Mohammad Hafifi Hafiz Ishak, Farzad Ismail
Nonetheless, the intermittency nature of solar and wind energy poses a major obstacle in the reliability of the energy generation system (Rehman et al. 2012). For example, the solar energy is only available during daylight hence operators are forced to plan a day ahead and compensate the fluctuation in each daily generation. In addition to fluctuation in sunrise and sunsets, the solar plant output also depends largely on clouds variations on an hourly basis. Wind power on the other hand can be considered as highly intermittent since it depends on a lot of factors such as wind speed, wind direction, air density, turbine characteristics and other factors. For example, the air speed must be above 3.5 ms−1 to generate electricity energy but air speeds must be below 25 ms−1 as to not damage the turbine (Huang, Lu, and McElroy 2014). The intermittence issue is not a problem for hydro power since it only requires water and gravity to generate electrical power which are available indefinitely. As indicated in Figure 1,the hydro power energy accounts for almost half of total renewable energy in the year 2020 at 1332 GW from a total of 2802 GW globally which indicates the reliability of hydro power for renewable energy generation.
Wind Speed Prediction Using Wavelet Decomposition Based on Lorenz Disturbance Model
Published in IETE Journal of Research, 2020
Yagang Zhang, Chenhong Zhang, Shuang Gao, Penghui Wang, Fenglin Xie, Penglai Cheng, Shuang Lei
Renewable energy is growing at the fastest pace in history and affects everyone in every corner of the world. According to the statistic data from International Energy Agency [1], in 2015, the amount of renewable energy investment is nearly $295 billion, mainly in wind power, solar photovoltaic and hydropower, etc., while the progress of technology and scale effect have leaded to the decrease of the cost. It can be seen that the development of renewable energy can not only meet the needs of a country’s energy but also can effectively promote the development of the economy. In these renewable energies, wind power has become a hot research object in each country. Since the wind energy is very likely to change significantly on a time scale of less than a few hours, the biggest problem in wind power lies in its dependence on wind energy fluctuations. Therefore, accurate wind speed forecasting is the key to the large-scale development and utilization of wind energy, which is very difficult [2].