How does geothermal energy work in power generation?

How does geothermal energy work in power generation?

• A. Hot water or steam from underground reservoirs is brought to the surface to turn turbines connected to generators
• B. Geothermal energy uses solar panels to directly create electricity
• C. Geothermal energy relies on tidal flows to generate electricity
• D. Geothermal energy uses chemical reactions in rocks to emit electricity

Answer: (A)

Geothermal power generation relies on heat from the Earth’s interior to make electricity. In typical plants, hot water or steam trapped in underground reservoirs is brought to the surface through wells. That heat is used to drive turbines, which are connected to generators; as the turbine spins, the generator converts the mechanical energy into electrical energy. After use, the steam is cooled and condensed back into water and often reinjected into the reservoir to keep the system sustainable. There are a few plant designs depending on the reservoir temperature: dry steam plants use steam directly; flash steam plants depressurize hot water to produce steam; and binary-cycle plants transfer the heat from geothermal fluid to a secondary working fluid with a lower boiling point. This approach is distinct from solar panels, tidal energy, or hypothetical rock-based chemical reactions, which rely on different energy sources or processes.

Geothermal power generation relies on heat from the Earth’s interior to make electricity. In typical plants, hot water or steam trapped in underground reservoirs is brought to the surface through wells. That heat is used to drive turbines, which are connected to generators; as the turbine spins, the generator converts the mechanical energy into electrical energy. After use, the steam is cooled and condensed back into water and often reinjected into the reservoir to keep the system sustainable.

There are a few plant designs depending on the reservoir temperature: dry steam plants use steam directly; flash steam plants depressurize hot water to produce steam; and binary-cycle plants transfer the heat from geothermal fluid to a secondary working fluid with a lower boiling point. This approach is distinct from solar panels, tidal energy, or hypothetical rock-based chemical reactions, which rely on different energy sources or processes.