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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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Geothermal energy is the____from the earth.
Heat
Light
Photons
Protons
Heat
Quick Summary: Geothermal energy is the thermal energy generated and stored in the Earth, originating from the original formation of the planet and the radioactive decay of materials such as uranium, thorium, and potassium in the Earth's crust and mantle.
Geothermal energy is the thermal energy generated and stored in the Earth, originating from the original formation of the planet and the radioactive decay of materials such as uranium, thorium, and potassium in the Earth's crust and mantle.
Q=mcΔT — Heat energy content formula
η=QinW — Efficiency of a heat engine cycle
The Earth's internal heat creates high-temperature gradients. Fluids (water or steam) are pumped or naturally circulate into these hot zones, absorbing the geothermal heat. This high-enthalpy fluid is then brought to the surface to drive steam turbines, converting the thermal energy into mechanical energy and finally into electrical energy via a generator.
Geothermal energy is a baseload renewable source, meaning it provides continuous, reliable power unlike solar or wind.
It is primarily classified as dry steam, flash steam, or binary cycle power plants.
The energy density is relatively low compared to fossil fuels, requiring large mass flow rates of geothermal fluid.
Near-zero greenhouse gas emissions during operation.
High capacity factor and constant availability (Baseload power).
Geographically restricted to specific tectonic locations.
Potential for reservoir depletion if not managed sustainably.
Direct heating for residential and industrial buildings.
Grid-connected electrical power generation.
Agricultural greenhouse climate control.
The heat source originates from the mantle core, where temperatures can exceed 5000°C.
Option B (Light), C (Photons), and D (Protons) are fundamental physical entities but do not define the thermodynamic source of geothermal energy extraction.
A is correct — Geothermal energy refers to the thermal energy contained within the earth, which is harnessed for power generation.
In competitive exams, remember that geothermal is one of the few renewable sources that does not depend on meteorological conditions, making it a critical baseload component.