The document discusses ocean wave energy conversion technologies. It provides an introduction to wave energy as a renewable resource and current statistics on wave energy converter companies. It describes the challenges in harnessing wave energy and outlines some core technologies used, including oscillating water columns and mechanical motion rectifiers. Test results are presented showing the ability of a mechanical motion rectifier-based power takeoff system to extract more power than a linear system. Ongoing wave energy projects in India are also briefly mentioned.

1. OCEANWAVE ENERGY CONVERTER
ARIJIT BISWAS
22NA60R10

2. CONTENTS OF SLIDES
PROBLEM STATEMENT
INTRODUCTION
 ENERGY CRISIS
WAVE ENERGY CONVERTER PRESENT STATISTICS
CHALLENGES
POWER TAKEOFF SYSTEM ( PTS )
MECHANICAL MOTION RECTIFIER ( MMR)
DESIGN & FABRICATION OF MMR
SIMULATION RESULTS
LAB TESTING RESULTS
CORE TECHNOLOGY

3. CONTENTS OF SLIDES
ONGOING OCEAN ENERGY PROJECTS IN INDIA
 CONCLUSION
REFERENCE

4. INTRODUCTION
RENEWABLE ENERGY WITH IMMENSE DEVELOPMENT POTENTIAL.
OCEAN WAVE ENERGY HAS ABUNDANT STORAGE .
100 % CLEAN ENERGY.
OCEAN ENERGY CONTAINS A HUGE AMOUNT OF ENERGY IN THE FORM OF
MARINE CURRENTS , OCEAN THERMAL ENERGY , TIDAL ENERGY , WAVE
ENERGY.
IT RESERVES HIGH DENSITY ENERGY .
USING WAVE ENERGY TO GENERATE ELECTRICITY IS MORE FLEXIBLE .

5. INTRODUCTION
THEORETICAL RESERVES OF GLOBAL OCEAN ENERGY
SOURCE CAPACITY (GW) ANNUAL GENRATION ( TWH)
MARINE CURRENTS 5000 50000
OSMOTIC 20 2000
OCEAN THERMAL 1000 10000
TIDE 90 800
WAVE 1000-9000 8000-80000

6. ENERGY CRISIS
ESTIMATION BY 2050
EUROPE ENERGY CRISIS
UKRAIN – RUSSIA WAR
( NORD GAS PIPE LINE FOR
NATURAL GAS )
RECORD PRICE , FUEL
SHORTAGE , RISING
POVERTY
DUE TO

7. ENERGY CRISIS
ESTIMATION BY 2050
ASIA ENERGY CRISIS
LNG PRICE HIKE ( JAPAN ,
PAKISTHAN , KOREA )
SHUTDOWN OF COAL BASE
POWER PLANT IN ASIA , CLIMATE
CHANGE . CORONA IMPACT
DUE TO

8. WAVE ENERGY CONVERTER PRESENT STATISTICS
COMPANY NAME ORIGIN
OCEAN POWER
TECHNOLOGIES
USA
CARNEGIE CLEAN
ENERGY
AUSTRALIA
HANN OCEAN ENERGY
PVT. LTD
SINGAPORE
AW ENERGY OY FINLAND

9. WAVE ENERGY CONVERTER PRESENT STATISTICS
0
5
10
15
20
25
30
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
POWER VS YEAR
ESTIMATION BY 2050
(Twh)

10. CHALLENGES
BUILDING AND OPERATING WAVE ENERGY PLANTS IS GENERALLY EXPENSIVE.
 CABLES , TURBINES AND OTHER INFRASTRUCTURE COULD POTENTIALLY HARM
MARINE LIFE.
SOME BUOYS CAPTURE THE UP AND DOWN MOTION OF THE WAVES, POWERING
GENERATORS, WHILE OTHERS CAPTURE THE SIDE TO SIDE MOTION.
SALT WATER IS SO CORROSIVE SO POWERFUL STORMS CAN DAMAGE MACHINERIES
VERY EASILY.
WAVE ENERGY BUOYS ARE CONSTANTLY MOVING AND CHALLENGING TO INSTALL
AND REPAIR.
THERE ARE ENORMOUS CHALLENGES TO HARNESSING THIS RENEWABLE ENERGY.

11. CORETECHNOLOGY

12. OCEAN CONVERTER
OCEAN CONVERTER MACHINE
CONSTRUCT FROM FOUR
PERSPECTIVES TECHNOLOGY COST
ECONOMY
ENERGY CAPTURE
RELIABILITY
ENVIRONMENT
FRIENDLINESS

13. OCEANWAVE CONVERTERTECHNOLOGIES
TYPES OF OCEAN WAVE TECHNOLOGY
OSCILLATING
WATER COLUMN
OSCILLATING
BODIES
OVERTOPPING
BODIES

14. OCEANWAVE CONVERTERTECHNOLOGIES
COMPARISON PARAMETERS OF SEVERAL CONVERTERS
NAME CATEGORY LOCATION DATA HDE (%) SCALE (M) CAPACITY(kW)
AQUABUOY POINT ABSORBER CANADA 2000 20 6 250
WAVEBOB POINT ABSORBER IRELAND 2007 40 15 1000
PELAMIS ATTENUATOR UK 2007 15 150 750
DEXA ATTENUATOR DENAMRK 2011 8 22 160
BIOWAVE TERMINATOR AUSTRALIA 2008 45 16 250
OYSTER TERMINATOR UK 2005 40 18 315
MUTRIKU OWC NORWAY 2011 7 180 300
PICO OWC PORTUGAL 2000 20 48 400
WAVE DRAGON OWEC DENMARK 2009 26 300 1200
SSG OWEC NORWAY 2008 23 54 350
SIX DOF MDWEC NA NA 54 10 831

15. POWER TAKE OFF SYSTEM
EX – COMBINATION OF AIR TURBINE , HYDRO ELECTRIC MOTOR AND
LINEAR GENERATOR IS THE PTO SYSTEM FOR LIMPAT PLANT.
FLOATING BUOY
THE MECHANISM OR MACHINERY WHICH CONVERTS THE WAVE
INTO ELECTRICITY , ITS CALLED PTO SYSTEM.
PTO SYSTEM -
LIMPET

16. FLOATING BUOY MECHANISM
THE SHAFT IS EITHER MOORED TO THE SEABED , WHILE THE BUOY CAN MOVE
UP AND DOWN ALONG THE SHAFT UNDER EXCITATION.
ENERGY EXTRACTED THROUGH THE RELATIVE MOTION BETWEEN THE
VERTICAL SHAFT AND FLOATING BUOY.
 THE BUOY OSCILLATES UNDER THE WAVE EXCITATION, AND THE
BIDIRECTIONAL MOTION OF THE BUOY IS CONVERTED INTO UNIDIRECTIONAL
ROTATION OF THE GENERATOR THROUGH MMR .
THE HARVESTED ENERGY CAN BE STORED IN BATTERY OR TRANSFERRED TO
GRID. A FLY WHEEL CAN BE READILY INTEGRATED INTO THIS SYSTEM AS WELL ,
SINCE THE GENERATOR ROTATES IN ONE DIRECTION.

17. FLOATING BUOY MECHANISM
TOTAL INSTALLATION OF FLOATION BUOY

18. PTO SYSTEM OF FLOATING BUOY USING MMR
PROTOTYPE OF FLOATING BUOY INSIDE THE BUOY
THE KEY MECHANISM OF PTO IS MMR , WHICH TRANSFERS BIDIRECTIONAL
MOTION INTO UNIDIRECTIONAL MOTION.
THE ESSENTIAL PART OF THIS CONCEPT CONSIST OF A FLOATING BUOY, A
MOORED SHAFT AND POWER TAKEOFF ( PTO) SYSTEM INSIDE THE BUOY.

19. ANIMATION OF WORKING PRINCIPLE

20. FUNCTION OF BEARING IN MMR
COMPONENTS ARE TWO RACKS , TWO PINIONS, TWO ONE WAY BEARINGS
AND OUTPUT SHAFT.
TWO PINIONS GEARS ARE MOUNTED ON THE OUTPUT SHAFT USING TWO
ONE WAY BEARING, EACH OF ALLOWS THE MOTION TRANSMISSION FROM
ONE DIRECTIONAL ONLY .
GEAR ENGAGE AND DISENGAGE MECHANISM

21. TESTING DATA
DATA FROM TESTING
GRAPH (a) SHOWS INPUT SPEED OF THE BUOY VS TIME ( SECONDS ).
GRAPH (b) SHOWS OUTPUT SPEED OF SHAFT VS TIME ( SECONDS) AFTER
USING MECHANICAL MOTION MACHINE.
IF WE CONSIDER INERTIA THEN THE GRAPH (b) IS SLIGHTLY CHANGED.

22. TESTING DATA
ABSORPTION POWER OF MMR SYSTEM AND LINEAR DAMPING SYSTEM UNDER
REGULAR WAVE EXCITATION.
THE CORRESPONDING ENGAGEMENT RATIO OF MMR SYSTEM . FOR THE RESULTS
PLOTTED IN THIS FIGURE , EQUIVALENT , M =1000 KG , WAVE AMPLITUDE (A) = .5 m

23. TESTING DATA
INFLUENCE OF EQUIVALENT MASS ON THE POWER ABSORPTION OF MMR
SYSTEM UNDER REGULAR WAVE EXCITATION (A)
THE CORREPONDING ENGAGEMENT RATIO OF MMR SYSTEM
FOR THE RESULT PLOTTED , PTO DAMPING C = 10^4 , WAVE PERIOD ( T s) = 5 S,
WAVE AMPLITUDE = .5 m .

24. ELECTRICAL CIRCUIT
CIRCUIT OF OCEAN TESTING
CIRCUIT OF LAB TESTING

25. ELECTRICAL OUTPUT
AMPLITUDE = 10 MM , FREQUENCY = 3 HZ , R = 2 OHM
OUTPUT POWER FROM THREE PHASE GENERATOR
AMPLITUDE = 10 MM , FREQUENCY = 3 HZ , R = 10 OHM

26. GOVERNING EQUATIONS
EQUTION THAT USING IN MECHANICAL PART
EQUTION THAT USING IN ELECTRICAL PART

27. ONGOING OCEAN POWER PROJECTS IN INDIA
INDIA HAS A COASTLINE OF OVER 7600 KM , INDIA CAN PRODUCE ENORMOUS RENEWABLE ENERGY
FROM OCEAN.
THERE ARE ONLY FEW PROJECTS SUCH AS A NEW 1 MW WAVE ENERGY PLANT AT VIZHINJAM ,
KERALA.
A 65 KW OCEAN THERMAL ENERGY CONVERSION PLANT IN LAKSHADWEEP.

28. CONCLUSION
THIS PPT IS ABOUT PRELIMINARY STUDY OF SINGLE BUOY WAVE ENERGY
CONVERTER WITH MECHANICAL MOTION RECTIFIER BASED ON POWER
TAKEOFF SYSTEM.
THE PROTOTYPE WITH 1.2 m BUOY WAS DESIGNED AND FABRICATED BASED ON
THIS CONCEPT.
 A STUDY OF SINGLE BUOY SYSTEM SHOWED THAT THE MMR BASED PTO
SYSTEM CAN EXTRACTED MORE POWER THAN LINEAR PTO SYSTEM.
IT CAPTURED 205 W POWER IN THE OCEAN TESTING.

29. REFERENCE
PUBLICATIONS –
Zhang,Y., Zhao,Y., Sun,W., & Li, J. (2021). Ocean wave energy converters:Technical principle,
device realization, and performance evaluation. Renewable and Sustainable Energy Reviews, 141,
110764.
Liang, C., Ai, J., & Zuo, L. (2017). Design, fabrication, simulation and testing of an ocean wave
energy converter with mechanical motion rectifier. Ocean Engineering, 136, 190-200.
WEBSITES –
https://www.weforum.org/agenda/2022/03/wave-energy-ocean-electricity-renewables/
 https://openei.org/wiki/Wave_Energy
https://www.wetgen.com/PTO_page.htm
https://wri-india.org/events/ocean-energy-potential-and-future-
india#:~:text=There%20is%20limited%20information%20on,for%20Ocean%20energy%20in%20India.
YOUTUBE CHANNEL –
https://youtu.be/mM4qTAqqZYc

30. THANKYOU