Question

Distinguish between Geothermal energy and Ocean thermal energy.

Answer 1

Sr. No.	Basis	Geothermal Energy	Ocean Thermal Energy
1.	Meaning	Geothermal Energy is heat energy obtained from hot rocks inside the earth.	Ocean Thermal Energy is energy from heat contained in solar-heated ocean water.
2.	Source	Geothermal Energy comes from hot magma and deep crustal hot springs.	Ocean Thermal Energy comes from the warm surface water of the ocean.
3.	Process	Geothermal Energy utilizes subterranean hot magma collected below the earth’s surface, creating hot spots used as the source of energy.	Ocean Thermal Energy uses warm surface water to boil liquids like ammonia.The resulting ammonia vapors drive a turbine to produce electricity.
4.	Reliability	Geothermal Energy is a stable source unaffected by weather or seasons.	Ocean Thermal Energy depends entirely on the temperature of ocean water.
5.	Example	Geothermal Energy occurs at hot springs in Dehradun, Gurgaon, and Manali.	Ocean thermal energy is used in power plants in coastal areas.