geothermal power plant

1. GEOTHERMAL POWER
PLANT

2. INTRODUCTION
• Geothermal power plants use hydrothermal
resources that have both water (hydro) and heat
(thermal). Geothermal power plants require high-
temperature (300°F to 700°F) hydrothermal
resources that come from either dry steam wells or
from hot water wells. People use these resources
by drilling wells into the earth and then piping
steam or hot water to the surface. The hot water
or steam powers a turbine that generates
electricity. Some geothermal wells are as much as
2 miles deep.

3. TYPES OF GEOTHERMAL POWER PLANTS
• There are three basic types of
geothermal power plants:
• Dry steam plants use steam directly
from a geothermal reservoir to turn
generator turbines.
• The first geothermal power plant was
built in 1904 in Tuscany, Italy, where
natural steam erupted from the earth.

4. • Flash steam plants take high-pressure
hot water from deep inside the earth
and convert it to steam to drive
generator turbines. When the steam
cools, it condenses to water and is
injected back into the ground to be
used again.
• Most geothermal power plants are
flash steam plants.

5. • Binary cycle power plants are
expected to be the most
commonly used type of
geothermal power plant in the
future, as locations outside of
the known hot spots begin to use
geothermal energy.
• Binary power plants transfer the
heat from geothermal hot water
to another liquid. The heat
causes the second liquid to turn
to steam, which is used to drive a
generator turbine.

6. ADVANTAGES OF GEOTHERMAL ENERGY
• There are plenty of hot springs and natural pools across the world that emit geothermal energy. The water
from such a natural source of geothermal energy is commonly used for bathing, warmth, and cooking.
• GHPs powered heating, and air-conditioning systems are more efficient as they use 25 to 50% less
electricity than conventional systems. Ultimately, there is a decrease in greenhouse gas emissions as well.
• Many buildings, sidewalks, and parking lots are heated using geothermal energy.
• Also, known as a green source of energy because it does not release hazardous greenhouse gases. Thus, it
is safe for both environmental and human health.
• Geothermal energy systems can adjust to various conditions.
• One of the best advantages of geothermal energy is that cold countries use geothermal energy to heat
greenhouses or heat water for irrigation.
• Iceland mostly uses geothermal energy to heat buildings and water using magma and molten rock
resources.
• It is a renewable, carbon-free, and sustainable source of energy. The Earth will continuously transmit heat
from its core for billions of years.

7. DISADVANTAGES OF GEOTHERMAL
ENERGY
• Geothermal energy emits sulphur dioxide and hydrogen sulphide.
• The regions that consist of geothermal plants often experience minor seismic activity.
• The power plants can also damage roadways, buildings, pipelines, and natural drainage systems.
• Land subsidence can also occur in case geothermal energy yielders fail to inject back the extracted water
from the reservoir into the Earth.
• The method of drilling geothermal plants deep under the Earth proves to be dangerous for the people
involved in the process that is one of the greatest disadvantages of geothermal energy.
• It is hard for developing countries to build thermal plants because of their high initial cost.
• Geothermal energy emits out at a gradual speed from the Earth's mantle.
• The construction of geothermal sites may be hazardous for the environment as the process may discharge
highly toxic gases.

9. Thank you