A large coal-fired power station produces 2000MW of electrical energy. A wind turbine with 33m blades can produce 300kW.
- How many turbines would be needed to replace the power station?
- Why, in actual practice, this number of turbines could not replace the coal-fired power station?
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- Electrical energy from the power station = 2000MW = 2000000kW
Therefore, number of turbines needed $= \frac{2000000}{300} = 6666.67$
Hence, 6667 turbines will be needed.
- In the thermal power plant mentioned, coal is burnt to produce electricity. Therefore, the quantum of electrical energy produced is fixed. A windmill produces electrical energy depending on the speed of wind, which may vary from time to time. Therefore, wind turbines cannot replace the coal-fired thermal power plant.
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