2. Contents
Introduction
About Geothermal Power Plant
Geothermal Hotspots
Types of Geothermal Power Plant
Power Plant Equipment
Operation of Power Plants
Geothermal Energy In Bangladesh
Advantages
Disadvantages
3. Introduction
Geothermal Energy:
Geothermal Energy is thermal energy generated and stored in the earth.
It is a renewable energy because of its source is the almost unlimited
amount of heat generated by the Earth's core.
Geothermal Power Plant:
Geothermal Power Plant uses superheated water to generate electricity.
It is a most efficient way to generate electricity because they require no
raw materials and having little or no impact on the environment.
4.
5. About Geothermal Power Plant
Current worldwide installed capacity is 10715 (MW), with the
largest capacity in the US (3,086 MW).
India has announced a plan to develop the country's first
geothermal power facility in Chhattisgarh.
Economically Geothermal power requires no fuel, it is therefore
immune to fuel cost fluctuations.
Geothermal power is considered to be renewable because any
projected heat extraction is small compared to the Earth's heat
content.
The Earth has an internal heat content of 1031 joules.
Further, due to its low emissions geothermal energy is considered
to have excellent potential for mitigation of global warming.
6. Geothermal Hotspots
The areas in the world with the higher underground temperatures are
regions with active volcanoes or geologically young volcanic events.
These “hot spots” occur at tectonic plate boundaries or where the
earth’s crust is thin enough to let the heat through.
The Pacific Rim, with its many active volcanoes, has many hot spots,
along with Alaska, Hawaii, and much of the western United States.
These regions are also seismically active with earthquakes and magma
movement, which breaks up rock structures and allows water to
circulate. As the water rises to the surface, natural hot springs and
geysers occurs.
7. Types of Geothermal Power Plant
Generally five types of power plants are used in the world.
Single Flash Power Plant
Double Flash Power Plant
Dry Steam Power Plant
Binary Cycle Power Plant
Combined Cycle Power Plant
13. Power Plant Equipment
ProductionWell
Generator
Turbine
Condenser
Separator
Heat Exchanger
Injection Well
14. Operation of Power Plants
Power House Equipment
Automatic Control and Communication System
Cooling System
Particulate or Droplet Erosion
Heat Exchangers
Gas Evacuation Systems
Re-Injection System
Chemical Injection System
15. Geothermal Energy In Bangladesh
Geo-tectonic Settings
Sub-himalayan Foredeep
Geothermal Province
Rangpur Saddle Geothermal
Province
Bogra Shelf Geothermal Province
Madhyapara Hard Rock Mine Area
Thakurgaon High-temperature Area
Potential Of Folded Belt
Geothermal Province
16. Advantages
It is a renewable source of energy.
By far, it is non-polluting and environment friendly.
There is no wastage or generation of by-products.
Geothermal energy can be used directly. In ancient times, people
used this
source of energy for heating homes, cooking, etc.
Maintenance cost of geothermal power plants is very less.
Geothermal power plants don't occupy too much space and thus help
in protecting natural environment.
17. Disadvantages
Only few sites have the potential of Geothermal Energy.
Most of the sites, where geothermal energy is produced, are far from
markets or cities, where it needs to be consumed.
Total generation potential of this source is too small.
There is always a danger of eruption of volcano.
Installation cost of steam power plant is very high.
There is no guarantee that the amount of energy which is produced
will justify the capital expenditure and operations costs.
It may release some harmful, poisonous gases that can escape
through the holes drilled during construction.