useful for study about Renewable energy.

1. PRESENTED BY,
MR. AJAY N JAGTAP
UNDER THE GUIDANCE OF
PROF. RAJESH CHAURASIYA
DEPARTMENT OF MECHANICAL ENGINEERING
DR. D.Y. PATIL S.O.E.T LOHGAON, PUNE - 412 105
A.Y.2018-19

2. CONTENT
2 OTEC ll DYPSOET
Need
OTEC Defined
Working Principle
Types
Applications
Advantages
Disadvantages
Future scope
Reference

3. 3 OTEC ll DYPSOET
To get continuous
(24/7) electrical
energy
To control Carbon
emission percentage
in atmosphere
To full fill the need of
water in particular
tropical area

4. OTEC DEFINED
OTEC is a process that can produce electricity by using the
temperature difference between deep cold ocean water and
warm tropical surface waters.
OTEC plants pump large quantities of deep cold seawater
and surface seawater to run a power cycle and produce
electricity.
OTEC ll DYPSOET 4

5.  It’s uses the principle of a heat engine
 OTEC Uses the vertical temperature
gradient in the ocean as a heat sink/source
 The minimum temperature difference required
should be 20℃ or more than 20 ℃
 OTEC system is based on the Rankine Cycle
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6. TYPES OF OTEC
 Depending on the location
• Land based plant
• Floating plant
 Depending on the cycle used
• Open cycle
• Closed cycle
• Hybrid cycle
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7. DEPENDING ON THE LOCATION
OTEC ll DYPSOET 7
Land based plant Floating plant

8. DEPENDING ON THE CYCLE USED
 Its uses the surface warm water as a working
fluid
 When this warm water is placed in a low-pressure
container, it starts boils.& this expanding steam
drives a turbine attached to a electrical generator.
 The steam ,which has left its salt behind in the low-
Pressure container, is almost pure fresh water
 It condensed back into liquid by exposure to cold temp from deep ocean
water
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Open cycle

9. Closed cycle
OTEC ll DYPSOET 9
 In a closed cycle use low boiling point temp
working fluid ,such as ammonia
 It is heated by warm water in a heat exchanger
where it boils the working fluid
 The vapor of the working fluid passes through
a turbine attached to a generator.
 And this vapor is condensed by deep cold ocean
water to complete the cycle.

10. Hybrid cycle
OTEC ll DYPSOET 10
 This cycle is the combination
of both open and closed cycle

11. APPLICATIONS
11 OTEC ll DYPSOET
To generate
electricity.
Air-
conditioning .
Desalination. Fresh water
production.

12. ADVANTAGES
OTEC ll DYPSOET 12
ECO- FRIENDLY IT IS RENEWABLE CONSTANT POWER
(24/7)SUPPLY
REDUCES
DEPENDENCE ON
FOSSIL FUEL

13. DISADVANTAGE
OTEC ll DYPSOET 13
More expensive than
power from fossil fuels
Pipes could damage coral
reefs
Less efficient than coal Space requirements is
more

14. FUTURE SCOPE
OTEC ll DYPSOET 14
One of the critical problem of the next century
will certainly be “global warming”.
OTEC is unique among all energy generation
technologies.
OTEC involves bringing up mineral rich water
from depth of ocean in future

15. OTEC ll DYPSOET 15