2. TABLE OF CONTENTS
● INTRODUCTION
● WORKING PRINCIPLE AND TYPES
● BLOCK DIAGRAM
● BENEFITS
● REFERENCES
3. INTRODUCTION
● Ocean waves are a huge , largely untapped energy resources ans the
potential for extracting energy waves is considerable
● Research in this area is driven by the need to meet renewable energy
targets
● Types of wave energy converters and its mechanism is describedin the
report
4. ● This review introduces general status of wave energy and evaluates the
devices that are used in current wave energy converter technology
● Best areas in order to develop the maximum efficiency
● In september 2008 another commercial wave power system is started to
operate in north portugal. It make use of the pelmis power generating
device built by pelamis wave in scotland
● It is an important area of research for generating electricity from the
renewable energy resource
5. ● WECDs are mechanical devices that are
employed in harvesting the kinetic energy of
ocean surface waves so as to generate electric
power.
● They are placed offshore at the ocean surface or just
below. A vertically submerged floater absorbs
wave energy which is converted by a piston or
linear generator into electricity.
WORKING PRINCIPLE AND TYPES
6. ● The functioning of oscillating water columns is somewhat similar to wind
turbine.
● There will be a turbine at the bottom of the chamber to convert the wind
power into electrical energy.
● The devices can be also placed near the shores where the waves break
this results in cost savings
7. POINT ABSORBER
● These are the buoy - type wave energy converters that harvest incoming wave
energy from all directions
● They are placed offshore at the ocean surface or just below. It consisting of several
floaters attached to meter rig
● The energy of the motion of the arms is agin captured in common hydraulic line and
converted into electrical current
8. TERMINATORS
● It consists of flaps that rotate with wave orbital motion around an axis parallel to
the wave front
● Although these designs capture wave energy with higher efficiency ,no large
scale operationaldepolyments have been realized.
● Hinged wave surge converters generally use of the hydraulic systems for the
power take off.
9. WAVE ATTENUATORS
● They are placed in predominant wave direction and “ride” the
waves
● The device consist of 2 hinged catamarans that pivot relative to the
other
● The main model that developed is called “ dexa”and patterned by
the DEXA Wave energy company
10. Power take-off systems (PTO)
● Oscillating water columns are the main and well described PTO system
● Wave absorbing devices use hydraulic motor systems or direct
electrical PTO SYSTEMS
● How ever , the hydraulic motor it consist of compression and
decompression of the fluid
11. .
Issues With Wave Energy Converters
● To be able to produce energy at competitive prices, several obstacles have to be
overcome. The following factors in particular determine the high costs of wind energy
● A very robust construction made of high quality materials is required that remains intact
under severe storms and withstands the demanding conditions at sea, leading to corrosion,
fouling and fatigue
● The classical protection measure against fouling and corrosion of steel structures is
regular maintenance and repainting. But this is time-consuming and costly because of the
difficult access to offshore installations,
● The cost of repair in the wave energy converter farm is very difficult.
12. Wave energy converters combined with Offshore Wind
● The high cost of stand-alone wave energy conversion schemes is a major obstacle for its
large-scale application. However, costs can be significantly reduced by combining WECs
with structures offshore or along the coast that are being built for other applications.
● The main advantage of integrated wind power generation is shared infrastructure costs,
especially foundations and grid connections. However, with the existing WEC techniques,
the costs per kWh produced are still higher with a combined wind-wave application than
with wind energy alone.
● Stability improvement can be a major benefit for designs in which the interaction between
the wind and wave sub-structures is strong, as in the case of a WEC combined with a
floating wind Turbine
13. WAVE CLIMATE
● In order to access the wave energy development wave climate should
want to be determined
● Wave climate determines an areas wave height calculations, wave
length calculation and total mean water depth
● From these we can compute wave power levels
14. BENEFITS
● Limited negative environmental impact in use in generally off shoe
devices have the lowest potential impact
● Natural seasonal variability of wave energy which follows
electricity demand in temperate climate
● Waves can travel longer distance tha the other renewable energy
energy source without any losses
15. ● Sea wave has te higher density than the other renewable energy
resources
● Wave power devices can generate upto 90% of power in time
compare to the other than 20 to 30% of the wind and solar
devices
● Higher the efficiency compare to the other power generating
devices from the renewable energy resources
18. CONCLUSIONS
● The generation of electricity from wave energy is
considerable.
● The different types of wave energy converting device
evaluated.
● This tells about the future scope wave energy converter.
● This method of generating electricity doesnot make any
environmental impacts.
