The document presents information about geothermal energy resources in Bangladesh. It begins with definitions of geothermal energy, noting that it comes from thermal energy generated and stored in the Earth's crust. It then provides background on the temperature increases within the Earth's layers and discusses how geothermal energy is produced from primordial heat and radioactive decay. Tables show reservoir temperature categories and the technologies used for each. Maps display the generalized tectonic structure and geothermal resources of Bangladesh. The past and positive uses of geothermal energy are also summarized.

1. Welcome To My
Presentation

2. Geothermal
Resources of
Bangladesh

3. What is geothermal energy?
Geothermal energy is thermal energy generated and stored in the
Earth.
It is the thermal energy contained in the rock and fluid (that fills
the fractures and pores within the rock) in the Earth’s crust.

4.  BACKGROUND OF GEOTHERMAL ENERGY
Earth’s core with temperature of approximately 6000°C is
the source of geothermal energy. Fundamentally five layers
of the earth – inner core, outer core, mantle and the crust.
Temperature increases about 17°- 30°C per every kilometer
in case of going downwards from the earth’s surface.
This energy inside the earth is produced from the primordial
heat and radioactive decay. Immense amount of heat
produced during the formation of earth about 4.5 billion
years ago is known as primordial heat.

5. Fig: Generalized tectonic map of
Bangladesh

6. Fig: Geothermal
map of
Bangladesh

7. Temperature of
Reservoir
Available Fluid Technologies Used
High Temperature
(>220°C)
Steam, Water Dry Steam, Flash
Steam
Intermediate
Temperature (100°-
220°C)
Water Flash Steam,
Binary Cycle
Low Temperature
(30°- 150°C)
Water Binary Cycle
Uses and Technologies for Various Reservoir Temperatures

8. Fig: Deep well
locations in
Bangladesh

9. USES OF GEOTHERMAL ENERGY IN THE PAST?
o Bathing: Ancient civilizations used hot springs for
bathing.
o Medical Therapy: Early Romans used geothermal water
to treat eye and skin disease.
o Cooking: Native Americans and others used geothermal
water for cooking.
o Heating: Early Romans used geothermal water to heat
their homes in Pompeii.

10. GEOTHERMAL’S POSITIVE ATTRIBUTES
 Useful minerals, such as zinc and silica, can be
extracted from underground water.
 Geothermal energy is homegrown. This will create
jobs , a better trading position and less reliance on oil
producing countries.
 US geothermal companies have signed $6 billion
worth of contracts to build plants in foreign countries in
the past couple of year.

11. Thanks To All