This document presents information about an Ocean Thermal Energy Conversion project. It includes an introduction to OTEC technology, descriptions of open and closed cycle systems, details about the group's design which uses a thermoelectric module to increase efficiency compared to conventional designs, schematics, materials used, how it works, calculations of efficiency around 26% for their design and 7% for conventional, discussions of pros and cons, and future prospects including making the technology more efficient and addressing environmental impacts.

1. Ocean
Thermal
Energy
Conversion
Major Project Presentation
Group members:
SUMAN SOURABH - 065
GANDHARV RANA - 067
VIKRAM JASWAL - 068
GAURAV KAPOOR - 090

2. Content Layout
• Introduction
• State of technology
• Schematic diagram
• Materials used
• Working
• Efficiency
• Pros and Cons
• Future prospects
• Queries ?

3. INTRODUCTION
• Ocean Thermal Energy Conversion (OTEC) is a technology for
generating renewable energy that uses the temperature difference
between the deep cold and relatively warmer surface waters of the
ocean to generate baseload electricity.
• Since OTEC exploits renewable solar energy, recurring costs to
generate electrical power are minimal.
• The high fixed costs dominate the economics of OTEC to the extent
that it currently cannot compete with conventional power systems.

4. TYPES
1. OPEN CYCLE OTEC
2. CLOSED CYCLE OTEC

5. STATE
OF
TECHNOLOGY
• Closed cycle OTEC.
• Conventionaly, Cold sea water is used as a heat
exchanger. It is inefficient and reduces the overall
efficiency by 10-15%.
• We have used THERMOELECTRIC MODULE for make
this process more efficient.
• A water level detector which indicates critical
water levels in the surface water holding tank.

6. Contd......
• We have used THERMOELECTRIC MODULE for make the
condensor more efficient.
• The module is connected in closed cycle.
• The 5V DC output is provided to the module which, according
to “PELTIER EFFECT”, produces a temperature difference ie. a
cold surface on one side and hot surface on the other.
• The colder surface of the module is attached to the condensor
which improves the condensation of unutilized steam and thus
increases the overall cycle efficiency of OTEC.

7. SCHEMATIC
INLET WATER TANK WITH
WATER LEVEL INDICATOR
BOILER
PRESSURIZER TURBINE
CONDENSER
WITH TEC
MODULE
STEP UP
TRANSFORMER
RECTIFIER
BATTERY
STORAGE
AC
APPLICATIONS
3V AC, 3000 rpm 3v to 9v AC

9. MATERIALS USED
• PRESSURE COOKER as a boiler.
• 3V AC, 3000 rpm tubine.
• 3-9V AC Step up Transformer.
• TEC-12709 Termoelectric Module with
condenser.
• Elecronic componenets : Diodes, NPN
Transistors, LM5708, Buzzer, circuit board.

10. WORKING
• Inlet water tank holds the ocean surface water . A water pump is used to
move the water to the boiler. We have used pressure cooker as a boiler.
• The steam produces rushes to the turbine section thereby rotating the 3V
AC,3000rpm turbine.
• A step up transformer used steps up the voltage to 9V.
• The rectifier section converts the AC voltage to DC voltage which is used
to charge a battery. By using a voltage limiter circuit , we can also charge
a mobile.
• The unused steam from the turbine reaches the condenser where the
steam is converted to water , which is fedback to the water inlet tank.

11. EFFICIENCY
Carnot efficiency :
E(c) = 1 – T(c) / T(h)
Temperatures needs to be in Kelvins, so :
1.0°C = 1.0 + 273 = 274K
100°C = 100° + 273 = 373K
Therefore :
E(c) = 1 - 274K / 373K
= 0.26541 (about 26.54 %)
Carnot efficiency :
E(c) = 1 – T(c) / T(h)
Temperatures needs to be in
Kelvins, so :
4.0°C = 4.0 + 273 = 277K
25°C = 25° + 273 = 298K
Therefore :
E(c) = 1 - 277K / 298K
= 0.070 (about 7 %)
OUR PROJECT CONVENTIONAL METHOD

12. Pro’s
Reneweble
Fresh Water
in open loop
Refrigeration
and Air
Conditioning
Agriculture

13. Con’s
Impingement
and
Entrainment
Biocide
Treatments
Effect on
marine life
Efficieny and
Economics

14. FUTURE PROSPECTS
• OTEC technology has the potential to be integrated with other
commercial systems (e.g., aquaculture and sea water air
conditioning) and products (e.g., potable water, ammonia, and
hydrogen).
• Energy and Economics can be enhanced by employing super
efficient Hybrid cycle OTEC.
• Addressing Impacts of OTEC.

15. QUERIES ??

16. THANK YOU