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Wind Turbine Energy Transformation

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Wind Turbine Energy Transformation

A regional council is considering a wind farm. Follow the energy from moving air to electricity, then use the evidence in the turbine data to make a recommendation. Answer in your own words where needed.

Follow the energy

Wind is moving air, so it has kinetic energy. The wind pushes the turbine blades and makes the rotor turn. Inside the turbine, a shaft transfers this movement to a generator. The generator transforms some of the movement energy into electrical energy. Some energy is also transferred to the surroundings as heat and sound. Turbines are designed to turn within a safe range of wind speeds; very strong winds can make them shut down to prevent damage.

1.Which sequence best describes the main energy transformation in a wind turbine?

Wind kinetic energy → rotational kinetic energy → electrical energy
Wind chemical energy → heat energy → electrical energy
Electrical energy → wind kinetic energy → sound energy
Wind potential energy → light energy → rotational energy

2.Name the turbine part that changes the turning motion into electrical energy. Explain what energy transformation happens there.

3.The generator and moving parts also warm up and make sound. What does this tell you about energy transfers in a real turbine?

Wind speed (km/h)

Power output (W)

210

300

4.Use the test data. At which tested wind speed was power output highest, and what was the output?

5.Between 10 km/h and 30 km/h, how much did the power output increase?

6.The team did not test at 50 km/h. Can you be certain that the turbine would produce more than 300 W at that speed? Explain your reasoning.

Choose a site wisely

A wind farm can generate electricity without burning fuel while it operates. Its impacts still depend on where it is built and how it is managed. A site needs a useful, reliable wind supply, suitable access for construction and maintenance, and careful planning for nearby communities and wildlife.

7.Select the two factors that most directly affect how much useful electricity a turbine can generate.

Wind conditions and generator performance
Blade colour and the day of the week
The number of nearby roads and the turbine's paint
The shape of clouds and the colour of the tower

8.Give one benefit and one possible impact of building a wind farm. Then name one action that could reduce the impact.

9.A coastal community has steady winds, but a proposed site is close to homes and an area used by migrating birds. Recommend one way to investigate or improve the plan before construction. Use a scientific reason in your answer.