Basic introduction on OTECH (RES) .

1. Renewable Energy sources
Renewable energy sources, such as
sunlight, water, and wind, are natural
resources that can be converted into these
types of clean, usable energy: Bioenergy.

2. OCEANS

3. • INTRODUCTION

4. The ocean (also the
sea or the world ocean)
is the body of salt
water that covers
approximately 70.8% of
the surface of Earth
and contains 97% of
Earth's water.

6. Among ocean energy sources, OTEC is one
of the continuously available renewable
energy resources that could contribute to
base-load power supply.
• OTEC - OCEAN THERMAL ENERGY
CONVERSION

7. • OTEC is a process in which
electricity is produced by
temperature differences between
deep ocean water and surface
ocean water
• It converts solar Radiation into
power

8. OTEC mainly works on the
principle RANKINE cycle
Heat energy is supplied to the
system via a boiler where the
working fluid (typically water) is
converted to a high pressure
gaseous state (steam) in order
to turn a turbine.

10. • OTEC uses working fluids that are
typically thought of as refrigerants
such as ammonia or R-134a.
There are 3 Methods of OTEC systems
they are :
• Closed OTEC system
• Open OTEC system
• Hybrid OTEC system
→

11. Closed Systems use Warm water to vapourize
working fluid and Vapour rotates the Turbine
Open Systems use boiled sea water that Vapour
is used to rotate the Turbine
Hybrid Systems use both combined form
Ammonia or water is then
cooled by deep ocean water

12. Mechanism or working principle of
Open OTEC System

13. Hybrid OTEC system

14. Closed OTEC system

16. Prospects of OTEC

17. Ocean thermal energy conversion uses the
temperature difference between cooler deep
and warmer shallow or surface seawaters to
run a heat engine and produce electricity. It
is base load electricity generation system.
OTEC is one of the continuously available
renewable energy resources

18. India is geographically well-placed to
generate ocean thermal energy, with
around 2000 kms of coast length along the
South Indian coast, where a temperature
difference of above 20oC is available
throughout the year. That means, about
1.5x106 square kilometres of tropical water
in the Exclusive Economic Zone around
India with a power density of 0.2 MW/km2.

19. Chennai-based National Institute of Ocean
Technology (NIOT), under the Earth Sciences
Ministry has now developed expertise in
design, assembly and deployment of deep sea
pipelines, reviving India's hopes to explore
Ocean Thermal Energy.

20. Ocean Thermal Energy Conversion (OTEC)
project is coming up in Kavaratti, capital of
the Lakshadweep archipelago, off the south-
western coast after almost three and a half
decades of initial plans.

21. The total OTEC potential around India is
estimated as 180,000 MW, considering 40% of
gross power for parasitic losses

22. ADVANTAGES DISADVANTAGES
Renewable Energy Expensive
Continuous Energy Generation Locality of Production
Environmental Freindly Temperature Dependent
Low Maintanence Less Efficient

23. Thank you
Bye prends