Geothermal Energy

This set of flashcards covers key concepts related to geothermal energy including definitions, types of geothermal power plants, and the process of how energy is extracted from the Earth.

Geothermal Energy

Energy derived from the heat stored within the Earth.

How does geothermal energy work?

Heat from the Earth's crust creates steam, which rotates a turbine connected to a generator, producing electricity.

Dry Steam Power Plant

A geothermal power plant where hot steam from underground is piped directly into turbines to power the generator.

Flash Steam Power Plant

A geothermal power plant that pumps hot water into a cooler temperature flash tank, causing steam to be generated.

Binary Cycle Power Plant

A geothermal power plant where hot water is passed through a heat exchanger to heat a second liquid that turns into steam.

Reservoirs of Geothermal energy

Sources such as volcanoes, hot springs, and fumaroles that contain geothermal energy.

Steps to harness energy from volcanoes

1) Hot water is pumped from underground; 2) Water pressure drops at the surface, turning it into steam; 3) The steam spins a turbine; 4) The steam cools in a tower, condensing into water; 5) Cooled water is pumped back underground.