The first step in building a wind turbine is setting up the tower where the fiberglass nacelle is installed. The nacelle is a strong, hollow casing that contains the inner workings of the wind turbine. Usually made of fiberglass, the nacelle contains the main drive shaft and the gearbox. Its inner workings also contain blade pitch and yaw controls. The nacelle is assembled and attached onto a base frame at a factory.

The most diverse use of materials and the most experimentation with new materials occur with the blades. Although the most dominant material used for the blades in commercial wind turbines is fiberglass with a hollow core, other materials in use include lightweight woods and aluminum. Wooden blades are solid, but most blades consist of a skin surrounding a core that is either hollow or filled with a lightweight substance such as plastic foam or honeycomb, or balsa wood. Wind turbines also include a utility box, which converts the wind energy into electricity and which is located at the base of the tower. The generator and wind powered street lights are standard equipment whose main components are steel and copper. Various cables connect the utility box to the nacelle, while others connect the whole turbine to nearby turbines and to a transformer.

Potential Positive and Negative Effects of Wind Solar Power System.There are a variety of potential positive and negative impacts of wind powered technology.

Potential positive impacts include:Wind energy is friendly to the surrounding environment, as no fossil fuels are burnt to generate electricity from wind energy.

Wind turbines take up less space than the average power station. Windmills only have to occupy a few square meters for the base; this allows the land around the turbine to be used for many purposes, for example agriculture.Newer technologies are making the extraction of wind energy much more efficient. The wind is free, and we are able to cash in on this free source of energy.

Wind turbines are a great resource to generate energy in remote locations, such as mountain communities and remote countryside.Wind turbines can be a range of different sizes in order to support varying population levels.When combined with solar electricity, this energy source is great for developed and developing countries to provide a steady, reliable supply of electricity.

Potential negative impacts include:Wind turbines generally produce less electricity than the average fossil fuelled power station, requiring multiple wind turbines to be built.Wind turbine construction can be very expensive and costly.

Wind turbines can have a negative impact to surrounding wildlife during the build process.

The noise pollution from commercial wind turbines is sometimes similar to a small jet engine.Protests and/or petitions usually confront any proposed wind farm development.

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