Classifications

• • 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
  • F03B13/141—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 with a static energy collector
  • F03B13/144—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 with a static energy collector which lifts water above sea level
  • F03B13/145—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 with a static energy collector which lifts water above sea level for immediate use in an energy converter
• • 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
  • F05B2240/00—Components
  • F05B2240/90—Mounting on supporting structures or systems
  • F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
• • 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
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S415/00—Rotary kinetic fluid motors or pumps
  • Y10S415/905—Natural fluid current motor
  • Y10S415/906—Natural fluid current motor having specific features for water current
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S416/00—Fluid reaction surfaces, i.e. impellers
  • Y10S416/04—Fluid current motor and generator

Definitions

• the invention relates to a plant for recovering energy from waves in motion in the water surface and as presented in the preamble of claim 1.
• a known plant of this type is described in SE publication no. 443,026.
• this known plant comprises a semidomed, bell-like construction floating in the water and taking water in at the top. The water is guided to a recep ⁇ tion pipe which guides the water to a turbine driving a generator for electrical energy.
• the known construction also provides the possibility of applying an elongated pipe extending parallel with the water surface and having the same diameter throughout its length, which pipe ends in a diffuser for water outlet.
• This plant is arranged to float partially submerged and the waves are caught by an upwardly-extending tower with open ⁇ ings in all directions allowing the water in the waves to run through the openings irrespective of the direction of the waves in relation to the plant. It is an unfavourable construction in respect of energy, as only a small part of the waves are caught; consequently, only a part of the wave energy is recovered.
• this construction has not considered the principle that water seeks its own level, as the diffuser of the plant is placed in direct continuation of the horisontal pipe. A wave passing perpendicularly to this construction will stop most of the outlet.
• the plant according to the invention and with the features presented in the characterizing part of claim 1 has the ad- vantage that the acquired device concentrates and utilizes the energy, i.e. both the kinetic and the potential energy in the waves, and guides the caught water to an energy con ⁇ verting engine without applying particular movable parts. Due to the design of the plant a large amount of water is collected currently throughout the length of the device, so that maximum energy recovery is achieved.
• the water admission velocity is increased through the reception funnels, so that the water reaches the turbine at an increased speed.
• the plant is preferably designed as presented and characte ⁇ rized in claim 5, whereby automatic regulation of the water admission to the turbine is obtained.
• the plant By designing the plant according to the invention as pre ⁇ sented and characterized in claim 10 it is achieved that the plant divides an admitted wave in such a manner that the plant is evenly loaded and the reception funnels are filled successively as the wave passes the plant, so that the admission of water is even; the admission of water to the water turbine will thus be even and constant.
• fig. 1 shows the plant in general but partially inter- sected at the one side
• fig. 2 is a side view of the floating plant on a smaller scale
• fig. 3 is a plane part section III-III in fig. 1
• fig. 4 is a plane part section IV-IV in fig. 1
• fig. 5 is a plane section V-V in fig. 1.
• Fig. 1 is an inclined front view of the plant in general according to the invention and in order to look into the construction its right side has been removed.
• the plant comprises a float 2, a part of which is above the water surface 25 while the rest is below the surface.
• the plant is anchored to an anchor by means of an anchor cable or an anchor chain 7 which will later be explained in more detail.
• the plant is substantially wedge-shaped and the anchor cable is attached close to the point, so that the plant will straighten out and thus will always turn its point towards the incoming waves.
• the wave hits the plant first i.e. at the pointed end of the plant, it comprises a ramp 3 extending down below the surface in an inclined manner allowing incoming waves to roll up the ramp and over the construction.
• the float 2 is roof-ridge-formed with the roof ridge 23 in the longitudinal direction.
• the plant is kept floating by a number of air chambers 16 being adjusted in such a manner that substantially only the reception funnels 4 and the shield 15 are above the water surface, cf. fig. 1.
• the funnels 4 When the waves roll into and up over the construction, the funnels 4 will be filled with water which at great speed is guided down into a reception pipe 8 through the narrowed course of the funnels, which pipe 8 at both ends is provid ⁇ ed with a turbine with an energy converting engine 9, e.g. for generating electrical energy, which through a cable (not shown) is conducted to an ordinary power supply sys ⁇ tem, possibly via a switch or converter station.
• the stern 5 of the construction will usually be below the water surface.
• the funnels 4 are formed of curved or bent shells or plates 12 and side plates 20 which additionally make up partition plates, so that the funnels 4 are arranged in sections.
• the arrangement of the funnels 4 is moreover arrow-shaped with the point directed towards the anchor cable 7 and the roof ridge 23, cf. fig. 1.
• the shield is highest at the middle and may be designed in such a manner that the curvature increases towards each side.
• the reception pipe 8 is actually made up of to pipes ex ⁇ tending from the middle under the roof ridge 23.
• the ar ⁇ rangement of the pipes 8 is also arrow-shaped and forms a more acute angle than does the arrow-shaped arrangement of the funnels 4.
• the plant At each side the plant is provided with a side chamber 10.
• the side chamber is partially filled with air and through the turbine 9 the reception pipe 8 opens at each side into the chamber 10, which will be explained in more detail with reference to fig. 5 of the drawing.
• Fig. 2 shows in more detail how the plant according to the invention floats in the water surface 27 and how a wave 26 passes the plant.
• An anchor 6 secures the plant 1 by means of an anchor chain or an anchor cable 7, which probably at the very top at the construction itself is subdivided, e.g. tripartited.
• the anchor chain must have such a length that at high water the chain forms an angle of at least 60° in relation to the horisontal plane or an angle V of 30° in relation to the vertical plane as shown in the drawing.
• the plant is hereby prevented from riding the waves, and max ⁇ imum energy recovery is achieved.
• Fig. 3 shows a vertical plane part section through the outer funnels.
• the funnels are formed of shells or plates 12 extending forward towards the incoming wave. Between the shells gaps 13 with narrowed down cross sections are formed in order to increase the velocity of the water. Some of the shells, preferably those in the lowest position, are pro ⁇ vided with valves 18 which will close if the water tries to flow back and out through the gaps 13.
• the valve flaps 18 may be made of reinforced rubber or the like and designed in such a manner that they are self-closing without mechan- ical manoeuvring members.
• the other end of the passages may also comprise valve flaps 19 preventing water from the more vertically positioned gaps from flowing out through the forward extending gaps.
• These valves are also valve flaps of reinforced rubber or the like without mechanical maneuvring members.
• the vertic ⁇ ally positioned gaps or water chambers may be designed having damming or reservoir chambers 21, in which the water can be dammed up before running into the reception pipe 8 later.
• the reservoir chambers 21 have air escape openings 22 at the top of the chambers allowing pos- sible air in the chambers to be pressed out this way.
• a pivoting guide plate 24 may be placed here, so that water pressure at the one side of the guide plate blocks the inlet from the opposite side.
• the water is moreover guided tangentially through the inlet 14 into the reception pipe 8 in such a manner that the water in the reception pipe flows along a helical line to- wards the turbine 9.
• Fig. 4 shows a plane part section in the reception funnels close to the middle of the plant. It appears that the re ⁇ ception funnels at the middle of the construction have no reservoir chambers and that the reception pipe 8 is more ⁇ over positioned further ahead due to the fact that the pipe 8 extends towards the rear in an inclined manner viewed from the middle of the construction.
• Fig. 5 shows how the water outlet from the turbine 9 takes place in the side chamber 10.
• the side chamber comprises an outlet chamber 17 partially filled with air, where the water from the reception pipe is guided through the tur ⁇ bine 9 out into the chamber and further out into the sea. When the waves roll over the construction and the water is guided down through the funnels, some air will be carried along which will collect at the top of the outlet chamber 17.
• the outlet chamber 17 has suitable means ensuring that the air leaves the chamber in a suitable manner so that a desired liquid level is maintained.
• All parts of the plant are made of strong materials, pre ⁇ ferably as a welded steel construction strong enough to stand the tremendous strain the whole construction is ex- posed to. Besides, all parts are made of corrosion resist ⁇ ant materials.
• the embodiment shown in the drawing and explained in the description being only an example, it is at any rate a pre ⁇ ferred example of how a plant according to the invention can be designed. It will be obvious to a person skilled in the art to design the plant in many different ways without deviating from that which is stated in the below patent claims. It will be obvious to a person skilled in the art that the size and strength etc. of the plant depends on where the plant is intended to be used, the maximum wave heights of the place in question and the average wave fre ⁇ quency. It will thus be possible within the scope of the invention to produce plants varying greatly in size.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
• Physical Water Treatments (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8153696

Family Applications (1)

Country Status (7)

Cited By (4)

Families Citing this family (24)

Citations (3)

Family Cites Families (5)

• 1991
  • 1991-11-01 US US08/211,840 patent/US5443361A/en not_active Expired - Lifetime
  • 1991-11-01 CA CA002122483A patent/CA2122483C/en not_active Expired - Lifetime
  • 1991-11-01 AU AU88755/91A patent/AU668077B2/en not_active Ceased
  • 1991-11-01 WO PCT/DK1991/000329 patent/WO1993009347A1/en active IP Right Grant
  • 1991-11-01 DK DK91919576T patent/DK0611418T3/da active
  • 1991-11-01 EP EP91919576A patent/EP0611418B1/en not_active Expired - Lifetime
• 1994
  • 1994-04-29 NO NO941599A patent/NO178164C/no not_active IP Right Cessation

Patent Citations (3)

Also Published As

Similar Documents

Legal Events