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Coal-Powered Electricity Generation

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Questions and Answers

What is the primary role of pulverizing coal in the electricity generation process?

Pulverizing coal increases its surface area for more efficient burning.

Explain how steam is generated in a boiler from burning coal.

Burning coal produces heat that converts water inside the boiler tubes into high-pressure steam.

Describe the function of the turbine in the steam coal electricity generation process.

The turbine converts high-pressure steam energy into mechanical energy by rotating its blades.

How does a generator convert mechanical energy into electricity?

The generator rotates wire coils in a magnetic field, inducing an electric current. Signup and view all the answers

What happens to steam after it passes through the turbine?

The steam is condensed back into water and returned to the boiler. Signup and view all the answers

Why is electricity transformed into higher voltages for transmission?

Higher voltages reduce energy loss as electricity travels long distances. Signup and view all the answers

What voltage transformation occurs as electricity approaches consumption points?

Electricity is transformed down to a safer 220 volts for homes. Signup and view all the answers

Flashcards

Coal burning in boiler

Pulverized coal is burned at high temperatures in a boiler, creating steam.

Steam generation

Heat from the burning coal converts water into high-pressure steam.

Turbine rotation

High-pressure steam pushes turbine blades, causing the turbine shaft to rotate.

Electricity generation

Rotating turbine coils in a magnetic field generate electricity.

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Steam condensation

Steam is condensed back into water, to be reused in the boiler.

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Electricity transmission

Electricity voltage is increased for efficient transmission over power lines.

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Power consumption

Electricity voltage is reduced to a safer level for homes.

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Study Notes