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What are the three requirements for geothermal energy?

Answer 1

Accessible heat source, heat transfer medium, and a steam/electric generator

It is impractical to try to tap magma directly, so the geothermal energy must be accessible in a controlled manner. Typically, the heat transfer occurs via ground water that is flashed into steam by the hot rock and is extractable through built piping or natural vents.

If one wants to produce electrical power, the steam must be used to drive a turbine that powers a generator; if not, thermal energy can be produced with a straightforward, locally focused steam distribution system.

In order to minimize water losses over time, the steam condensate is typically recycled back into the rock formation.

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Answer 2

Samuel Albin

Access to a geothermal reservoir or heat source.
Technologies for extracting and converting the heat from the reservoir.
Suitable geological conditions for the effective utilization of geothermal energy.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.