What are the main geothermal resource types mentioned?

What are the main geothermal resource types mentioned?

• A. Dry-steam, flash-steam, and binary-cycle geothermal resources.
• B. Nuclear fission, fusion, and fission.
• C. Solar, wind, and hydro.
• D. Coal bed methane and shale gas.

Answer: (A)

Geothermal energy uses different resource types based on how the underground hot fluid is used to generate electricity. The three main resource types are dry-steam, flash-steam, and binary-cycle systems. Dry-steam resources provide steam directly from the reservoir to drive the turbine. Flash-steam resources pull hot water from the reservoir and depressurize it so it flashes into steam that powers the turbine. Binary-cycle resources use a secondary working fluid with a lower boiling point; heat from the geothermal fluid is transferred through a heat exchanger to vaporize this fluid, which then drives the turbine. These three approaches cover the typical ways geothermal plants convert heat to electrical energy. The other options describe nuclear energy, solar/wind/hydro, or fossil gas resources, which are not geothermal resource types.

Geothermal energy uses different resource types based on how the underground hot fluid is used to generate electricity. The three main resource types are dry-steam, flash-steam, and binary-cycle systems. Dry-steam resources provide steam directly from the reservoir to drive the turbine. Flash-steam resources pull hot water from the reservoir and depressurize it so it flashes into steam that powers the turbine. Binary-cycle resources use a secondary working fluid with a lower boiling point; heat from the geothermal fluid is transferred through a heat exchanger to vaporize this fluid, which then drives the turbine. These three approaches cover the typical ways geothermal plants convert heat to electrical energy. The other options describe nuclear energy, solar/wind/hydro, or fossil gas resources, which are not geothermal resource types.