Towards Green Energy — Flashcards

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Most electric power plants work on electromagnetic induction. A changing magnetic field around a conductor produces a potential difference across the conductor.

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A potential difference is produced when the magnetic field around a conductor changes. This happens when a magnet rotates near a stationary conductor or when a conductor moves near a stationary magnet…

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A turbine is a bladed machine rotated by flowing liquid, gas, or steam. It drives the electric generator and helps produce electricity.

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Burning coal releases carbon dioxide, sulphur oxide, and nitrogen oxide. These gases pollute air, harm health, and contribute to environmental problems. Coal is also a limited resource.

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Coal burns in a boiler to heat water. Steam at high temperature and pressure turns the turbine. The turbine drives the generator. The steam is then cooled in the condenser and converted back into wate…

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The boiler heats water using thermal energy from burning coal. This produces high temperature, high pressure steam.

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A condenser cools low-pressure steam after it has driven the turbine. The steam changes back into water, which is then reused.

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Water from the cooling tower passes through the condenser and absorbs heat from steam. The absorbed heat is released to the atmosphere as vapour and heated air.