09-09-2017, 11:13 AM
Wind energy converts kinetic energy into wind to generate electricity or mechanical energy. This is done by using a large wind turbine which usually consists of propellers; the turbine can be connected to a generator to generate electricity, or wind used as mechanical power to perform tasks such as pumping water or grinding grain. As the wind passes the turbines move the blades, which rotates the shaft. There are currently two different types of wind turbines in use, horizontal axis wind turbines (HAWT) or vertical axis wind turbines (VAWT). HAWT are the most common wind turbines, which show propeller blades or "fan style", and VAWT are often in an "egg beater" style.
Wind energy is the use of airflow through wind turbines to generate mechanical energy for electrical energy. Wind energy, as an alternative to burning fossil fuels, is abundant, renewable, widely distributed, clean, does not produce greenhouse gas emissions during operation, does not consume water and uses little soil. The net effects on the environment are much less problematic than those of non-renewable energy sources.
Wind farms consist of many individual wind turbines that are connected to the electric power transmission network. Wind on land is a cheap source of electrical energy, competitive with or in many places cheaper than coal or gas plants. Coastal wind is more stable and stronger than land, and offshore farms have less visual impact, but construction and maintenance costs are considerably higher. Small wind farms on land can power some power in the grid or provide electrical power to isolated locations outside the grid.
Wind power offers variable power that is very consistent from year to year, but has a significant variation in shorter time scales. It is therefore used in conjunction with other sources of electrical energy to provide a reliable supply. As the share of wind power in a region increases, there may be a need to improve the grid and a lower capacity to supplant conventional production. Energy management techniques, such as over capacity, geographically distributed turbines, distributable sources of support, sufficient hydropower, export and import of energy to neighboring areas or reduced demand when wind power production is low can overcome in many cases these problems. the prediction allows the electric power grid to prepare for the predictable variations in production that occur.
From 2015, Denmark generates 40% of its electricity from the wind, and at least 83 other countries around the world are using wind power to power their electricity networks. In 2014, global wind capacity increased by 16% to 369,553 MW. Annual wind power production is also growing rapidly and has reached around 4% of global electricity consumption, 11.4% in the EU.
Wind energy is the use of airflow through wind turbines to generate mechanical energy for electrical energy. Wind energy, as an alternative to burning fossil fuels, is abundant, renewable, widely distributed, clean, does not produce greenhouse gas emissions during operation, does not consume water and uses little soil. The net effects on the environment are much less problematic than those of non-renewable energy sources.
Wind farms consist of many individual wind turbines that are connected to the electric power transmission network. Wind on land is a cheap source of electrical energy, competitive with or in many places cheaper than coal or gas plants. Coastal wind is more stable and stronger than land, and offshore farms have less visual impact, but construction and maintenance costs are considerably higher. Small wind farms on land can power some power in the grid or provide electrical power to isolated locations outside the grid.
Wind power offers variable power that is very consistent from year to year, but has a significant variation in shorter time scales. It is therefore used in conjunction with other sources of electrical energy to provide a reliable supply. As the share of wind power in a region increases, there may be a need to improve the grid and a lower capacity to supplant conventional production. Energy management techniques, such as over capacity, geographically distributed turbines, distributable sources of support, sufficient hydropower, export and import of energy to neighboring areas or reduced demand when wind power production is low can overcome in many cases these problems. the prediction allows the electric power grid to prepare for the predictable variations in production that occur.
From 2015, Denmark generates 40% of its electricity from the wind, and at least 83 other countries around the world are using wind power to power their electricity networks. In 2014, global wind capacity increased by 16% to 369,553 MW. Annual wind power production is also growing rapidly and has reached around 4% of global electricity consumption, 11.4% in the EU.