WO2017221262A1 - A new process to convert energy available in coastal sea waves, oceans and water bodies to generate electricity. - Google Patents
A new process to convert energy available in coastal sea waves, oceans and water bodies to generate electricity. Download PDFInfo
- Publication number
- WO2017221262A1 WO2017221262A1 PCT/IN2017/000107 IN2017000107W WO2017221262A1 WO 2017221262 A1 WO2017221262 A1 WO 2017221262A1 IN 2017000107 W IN2017000107 W IN 2017000107W WO 2017221262 A1 WO2017221262 A1 WO 2017221262A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wave
- rack
- power takeoff
- engaged
- activated body
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/1845—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem
- F03B13/1855—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem where the connection between wom and conversion system takes tension and compression
- F03B13/186—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem where the connection between wom and conversion system takes tension and compression the connection being of the rack-and-pinion type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/402—Transmission of power through friction drives
- F05B2260/4021—Transmission of power through friction drives through belt drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/403—Transmission of power through the shape of the drive components
- F05B2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Definitions
- This present invention relates to devices popularly known as Wave Energy Convenors ( WEC) which prod uces electricity or converts energy in sea waves or water bodies into any useful form.
- WEC Wave Energy Convenors
- this invention includes a wave activated body to capture energy in sea and a mechanical device for extracting the energy.
- Ocea n waves varies its character continuously.
- the main factors affecting the character of the ocean waves are its height, wave length, direction and period. These factors change continuously for each wave a nd hence it becomes a challenge to design a WEC to capture the energy in waves irrespective of the character of the wave.
- WEC Wave Energy Converter
- Wave Energy Converters Methods to harness Ocean wave energy by the a bove mentioned Wave Energy Converters can be broadly classified by Power Ta ke-Off systems ( PTO) and by location.
- PTO Power Ta ke-Off systems
- Wave energy is very high in deep seas.
- WEC are designed to operate in deep seas were these devices are subjected to severe stress due to extreme weather conditions.
- WEC designs are constructed /fabricated with high allowance on safety factor. Design of such WEC with high ma rgin of safety is expensive increasing the Capital cost.
- WEC is made from specialized materials which increase costs. As the location of WEC moves away from the shore the WEC mooring cost in deep sea bed ( using specialized off-shore vessels and personnel) increases costs.
- WEC described above have several disadvantages in terms of using complex energy conversion systems at the PTO stage and its location in deep seas, cumulatively increases the Capital , I nstallation, Operation and maintenance costs excessively. Hence these WECs' are techno- commercially unviable.
- This invention comprises a floating surface similar to a boat but with geometrical changes at the bow side to maximize u pward movement of the boat to incoming waves.
- a Power Takeoff (PTO) mechanism comprising rack,pinion and gears configured to attain a unidirectional rotation and this rotation through belt /chain/gear drive is attached to a dynamo or a lternator to produce electricity.
- FIG. 1 there is illustrated an exemplary wave energy conversion system for harnessing wave energy.
- the wave actuated body is similar to a boat structure which floats in sea a nchored to the sea bed. Henceforth wave activated body will be referred to boat in this description.
- boat is used to assist in understanding the wave activated body and hence the shape, design and geometry of the floating body will depend on the prevailing wave regime were this invention is deployed.
- the floating body can be of any shape but the surface area in contact with the waves should be effective and efficient in capturing the energy in waves.
- a vertical rack is fixed in the bow section of the boat which is engaged to and drives Pinion 1 and Pinion 2. as shown in Fig 1.
- Another rack can be fixed on the stern side as shown in schematic Fig 4(a) and 4(b).
- the two different shafts of the Pinions 1 a n 2 contain corresponding gears 1 and 2 on the other end of the shafts . These Gears 1 and 2 are engaged continuously.
- the shaft 1 rotates on the upward movement of the rack and in the downward movement of the rack the shaft 2 rotates. Since the gear 2 of the shaft 2 is engaged with gearl of shaft 1, shaft 1 continues to rotate. Thus there is a continues rotation of the shaft 1 which is connected to a generator to prod uce electricity or to convert to any other form of energy.
- Rack a nd Power takeoff mechanism can be fixed at a ny location in the wave activated body.
- a schematic diagram is shown in fig 4. for better understanding. Electricity generation can also be shore based.
- the electric generator has been described /shown as provided close to the floating body, it is appreciated that it can be provided at a distance such as at shore through appropriate transmission systems.
Abstract
A wave Energy conversion process is described in the abstract.The system comprises of Wave activated body which absorbs energy in waves. The floating surface is anchored to the sea surface and hence will encounter sympathetic reciprocating motion corresponding to the approaching wave surge and heaves. The floating surface will hold a Power Takeoff mechanism which converts reciprocating motion to rotary motion. This rotary motion will be engaged to an alternator to produce electricity.
Description
TITLE OF THE INVENTION
A NEW PROCESS TO CONVERT ENE RGY AVAILABLE IN COASTAL SEAWAVES, OCEANS AND WATER BODI ES TO GEN ERATE ELECTRICITY
FIELD OF INVENTION
This present invention relates to devices popularly known as Wave Energy Convenors ( WEC) which prod uces electricity or converts energy in sea waves or water bodies into any useful form. In particular this invention includes a wave activated body to capture energy in sea and a mechanical device for extracting the energy.
BACKGROUND OF INVENTION
Ocea n waves varies its character continuously. The main factors affecting the character of the ocean waves are its height, wave length, direction and period. These factors change continuously for each wave a nd hence it becomes a challenge to design a WEC to capture the energy in waves irrespective of the character of the wave.
Several Wave Energy Converter (WEC) designs are proposed ( and patented) and few of them have constructed prototypes that have been deployed in ocean environment. Examples of such patented WECs' are descri bed in US PTO Patents Nos., 9,074,577, 9,068,551, 9,018,779, 8,937,396, 8,893,492
Methods to harness Ocean wave energy by the a bove mentioned Wave Energy Converters can be broadly classified by Power Ta ke-Off systems ( PTO) and by location.. These Wave Energy Converters, at the PTO stage, due to different characteristics of the waves, use systems such as hydra ulic ram, elastomeric hose pump, pump-to-shore, hydroelectric turbine, linear generator and combination of these systems. All these systems due to their inherent characteristics have either low efficiency or unable to react/respond to rapid changes in the Ocean Wave characteristics /regime.
Wave energy is very high in deep seas. Hence many WEC are designed to operate in deep seas were these devices are subjected to severe stress due to extreme weather conditions. To overcome such extreme weather conditions, WEC designs are constructed /fabricated with high allowance on safety factor. Design of such WEC with high ma rgin of safety is expensive increasing the Capital cost. To overcome corrosive environment in oceans, WEC is made from specialized materials which increase costs. As the location of WEC moves away from the shore the WEC mooring cost in deep sea bed ( using specialized off-shore vessels and personnel) increases costs.
The location of WEC in deep Ocean either floating or submerged requires specialized electrical cables for transmission of energy/electricity which is normally laid under water which also is expensive.
To summarize, WEC described above have several disadvantages in terms of using complex energy conversion systems at the PTO stage and its location in deep seas, cumulatively increases the Capital , I nstallation, Operation and maintenance costs excessively. Hence these WECs' are techno- commercially unviable.
There is therefore a need to design a simple mechanism which ca ptures wave energy a nd converts it into clean electricity at Low Capital and Operating cost.
SUMMARY
The problems associated with WEC s' as described above, is addressed by this Invention. This invention comprises a floating surface similar to a boat but with geometrical changes at the bow side to maximize u pward movement of the boat to incoming waves.
A Power Takeoff (PTO) mechanism comprising rack,pinion and gears configured to attain a unidirectional rotation and this rotation through belt /chain/gear drive is attached to a dynamo or a lternator to produce electricity.
This invention will be better understood in the detailed description along with drawings
DETAILED DESCRIPTION OF THE PRESENT DISCLOSURE
The invention will now be described with reference to an exemplary system which is provided to assist in an understanding of the teaching of the invention.
Referring to Fig 1 and Fig 2, there is illustrated an exemplary wave energy conversion system for harnessing wave energy.
In one exemplary embodiment the wave actuated body is similar to a boat structure which floats in sea a nchored to the sea bed. Henceforth wave activated body will be referred to boat in this description.
While it is not intended to limit the teaching of the present invention to any specific type of boat structure, the word " boat " is used to assist in understanding the wave activated body and hence the shape, design and geometry of the floating body will depend on the prevailing wave regime were this invention is deployed. The floating body can be of any shape but the surface area in contact with the waves should be effective and efficient in capturing the energy in waves.
Using structure made of concrete or other materials, foundations a re laid in the sea bed to hold the boat on the port and the star board side which will allow this boat to reciprocate vertically only. The bow section of the boat will face the incoming waves and so the boat will oscillate in sym pathy with the wave height , wave length and period.
A vertical rack is fixed in the bow section of the boat which is engaged to and drives Pinion 1 and Pinion 2. as shown in Fig 1. Another rack can be fixed on the stern side as shown in schematic Fig 4(a) and 4(b).
In fig 3 the exploded view of the Pinions are shown. In Pinion 1 a u nidirectional bearing is fixed which transfers energy i n only clock wise direction. I n Pinion 2, another unidirectional bearing is fixed which transfers energy only in anti-clockwise di rection.
In one cycle, as the rack goes up due to the upward motion of the boat, Pinion 1 gets engaged and transfers energy to its connected shaft while Pinion 2 although engaged to the rack slips. Hence the shaft connected to Pinionl rotates during the upward stroke of the rack, while the shaft connected to the Pinion 2 remains ideal.
During the downward motion of the rack Pinion 2 gets engaged and transfers energy to its connected shaft while Pinion 1 although still engaged to the rack slips. Hence the shaft connected to Pinion2 rotates during the downward stroke of the rack, while the shaft connected to the Pinion 1 is de- energized.
The two different shafts of the Pinions 1 a n 2 contain corresponding gears 1 and 2 on the other end of the shafts . These Gears 1 and 2 are engaged continuously. The shaft 1 rotates on the upward movement of the rack and in the downward movement of the rack the shaft 2 rotates. Since the gear 2 of the shaft 2 is engaged with gearl of shaft 1, shaft 1 continues to rotate. Thus there is a continues rotation of the shaft 1 which is connected to a generator to prod uce electricity or to convert to any other form of energy.
Rack a nd Power takeoff mechanism can be fixed at a ny location in the wave activated body. A schematic diagram is shown in fig 4. for better understanding. Electricity generation can also be shore based.
Although the electric generator has been described /shown as provided close to the floating body, it is appreciated that it can be provided at a distance such as at shore through appropriate transmission systems.
Claims
1. A wave energy conversion system, the system comprising:
A wave energy activated body configured to generate reciprocating motion from passi ng waves with at least one Power takeoff mechanism being driven by the wave energy activated body, which converts reciprocati ng motion to rotary motion, the rotary motion engaged to a electricity generating systems and other energy conversion systems.
2. A system as claimed in claim l,the wave activated body is a floating body with adequate surface area ,engaged with the waves to ca pture maximum energy
3. A system as claimed in claim 2, the Wave activated body will be moored and will be positioned Perpendicu lar (encounter/confront) to the approaching waves.
4. A system as claimed in claim 2, each wave activated body will operate more than one Power takeoff system.
5. A system as claimed in claim l,atleast one rack is configured to engage with the wave energy activated body and Power takeoff mechanism to convey reciprocating motion
6. A system as claimed, in claim 5 , in Power takeoff mechanism the rack is engaged with the wave energy activated body and operably with at least two pinions
7. A system as claimed in Claim 5, the Power takeoff mechanism comprising a system of rack, pinions, bearings, shafts and gears which converts reciprocating motion to rotary motion.
8. A system as claimed in claim 6, the pinions are fitted with unidirectional bearings.
9. A system as claimed in claim 8, these pinions will transfer energy in opposite direction
corresponding to the upwa rd and downward movement of the rack.
10. A system as claimed in claim 6, each of these pinion contains a shaft with a gear on the other end.
11. A system as claimed in claim 10, gears of each shaft are always engaged to prod uce contin uous Uni directiona l rotation in a ny one shaft, as the rack moves up and down vertically.
12. A system as claimed in claim 11, the continuous unidi rectional rotating shaft is connected to a electric generator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN201641021029 | 2016-06-20 | ||
| IN201641021029 | 2016-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017221262A1 true WO2017221262A1 (en) | 2017-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IN2017/000107 WO2017221262A1 (en) | 2016-06-20 | 2017-06-16 | A new process to convert energy available in coastal sea waves, oceans and water bodies to generate electricity. |
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| WO (1) | WO2017221262A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080197631A1 (en) * | 2006-06-14 | 2008-08-21 | Alvaro Jose Atilano Medina | Wave-power system and method for generating energy at constant rotational speed at variable significant wave heights and periods |
| US20150204304A1 (en) * | 2012-10-05 | 2015-07-23 | Ocean Harvesting Technologies Ab | Wave energy converter |
-
2017
- 2017-06-16 WO PCT/IN2017/000107 patent/WO2017221262A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080197631A1 (en) * | 2006-06-14 | 2008-08-21 | Alvaro Jose Atilano Medina | Wave-power system and method for generating energy at constant rotational speed at variable significant wave heights and periods |
| US20150204304A1 (en) * | 2012-10-05 | 2015-07-23 | Ocean Harvesting Technologies Ab | Wave energy converter |
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