CN109441694A - A kind of system of underwater power generation and method suitable for low-speed flow sea area - Google Patents
A kind of system of underwater power generation and method suitable for low-speed flow sea area Download PDFInfo
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- CN109441694A CN109441694A CN201811207860.7A CN201811207860A CN109441694A CN 109441694 A CN109441694 A CN 109441694A CN 201811207860 A CN201811207860 A CN 201811207860A CN 109441694 A CN109441694 A CN 109441694A
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- Prior art keywords
- kite
- underwater
- tether
- aileron
- power generation
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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
-
- 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
- F03B15/00—Controlling
-
- 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
- F05B2240/91—Mounting on supporting structures or systems on a stationary structure
- F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
- F05B2240/9172—Mounting on supporting structures or systems on a stationary structure attached to cables of kite type with traction and retraction
-
- 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
- Y02E10/20—Hydro energy
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- 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)
Abstract
The invention proposes a kind of system of underwater power generation and method suitable for low-speed flow sea area, are related to the underwater power generation technical field in deep-sea low-speed flow sea area.Realize that the underwater figure of eight of kite moves by the preset rudder angle on the pulling force and kite aileron of tether.The underwater kite movement velocity of tether at least can achieve 4-6 times of local water velocity.In deep-sea low-speed flow sea area, the method for the present invention can be improved the speed of related movement of power generator and water flow, can dramatically increase power generation output power, to make full use of the underwater energy in deep-sea to provide a kind of reliable, efficient method.
Description
Technical field
The invention belongs to the underwater power generation technical fields in deep-sea low-speed flow sea area, and in particular to one kind is suitable for low-speed flow sea
The system of underwater power generation and method in domain.
Background technique
Scope of activities of the mankind in ocean mostly concentrates on low-speed flow and (is defined as water velocity less than 2.5m/s) at present
Sea area, and with the continuous development of technology, mankind's activity range forward direction deep-sea field extension, how in deep-sea low-speed flow sea area
In make full use of marine resources to meet mankind's energy demand, will be a urgent and important problem.On the one hand in depth
The method that sea region can be used for generating electricity is less；On the other hand existing deep-sea field electricity-generating method such as relies on conventional fixed-type
Hydraulic turbine electricity-generating method generates electricity at deep-sea, low-speed flow, and output power is not high, and efficiency-cost ratio is lower.
Generating power by water current output power is proportional to 3 powers of the speed of related movement of power generator and water flow, deep-sea low speed
Flow sea area generated output it is low, mainly due to power generator and water flow speed of related movement it is lower caused by.How deep-sea is improved
The speed of related movement of power generator and water flow is a key points and difficulties problem urgently to be resolved in the case of low-speed flow.
In conclusion in deep-sea low-speed flow sea area, one kind is simple, reliable, generate electricity the higher hair of output power not yet at present
Method for electrically.
Summary of the invention
Technical problems to be solved
It is low with the lower caused generated output of water flow speed of related movement in order to solve power generator in the prior art, this
Invention proposes a kind of system of underwater power generation and method suitable for low-speed flow sea area.
Technical solution
A kind of system of underwater power generation suitable for low-speed flow sea area, it is characterised in that flat including underwater kite, fixed buoy
Platform, left side tether and right side tether, underwater kite are connected to fixed buoy platform by left side tether flexible and right side tether
On, fixed buoy platform is fixed on the water surface, is discharged in underwater kite to water；The underwater kite be equipped with aileron, the hydraulic turbine,
Rudder plate and load cabin, the hydraulic turbine are mounted below rigid aileron, for realizing energy conversion；Rudder plate is mounted on aileron two sides；
Load cabin is mounted on aileron down either side, and inside is mounted with comprehensively control unit, battery and motor, and load cabin rises simultaneously to be increased
Steady effect is modeled by UG and determines its specific installation site, and load cabin is realized and the hydraulic turbine by the mating transition form of gear
Reciprocation；Comprehensively control unit is the information process unit of underwater kite, is on the one hand used for underwater kite system timing process
Integrated management, on the other hand for controlling the deflection of aileron rudder angle；Underwater kite is by carrying sensing element real-time perception certainly
Body state, rudder angle needed for movement is calculated by comprehensively control unit, then by preset deflection rudder angle, in the effect of water flow
The spindle movement of achievable kite down, meanwhile, the figure of eight movement of underwater kite is realized under the action of tether elastic force.
A kind of underwater power generation method, it is characterised in that steps are as follows:
Step 1: being first reference with the corresponding angle of attack of kite section blade profile maximum lift-drag ratio, then by underwater kite
System modeling and simulation obtains the corresponding angle of attack of maximum lift-drag ratio under the effect of actual elastic rope；It is controlled by comprehensively control unit
Rudder angle deflection, the available required angle of attack, and then realize expected lift resistance ratio coefficient；Meet underwater kite movement velocity extremely
It can achieve 4-6 times of local water velocity less；
Step 2: by the hydrodynamic force on flow action under water kite aileron, moving kite with stream, to tense and be
Rope exports electric energy so that the axial hydraulic turbine is pivoted, this stage is known as energy output stage；
Step 3: after tether is tightened, kite starts recycling movement under tether resilient force, passes through in recovery stage
Change the size of rudder angle to reduce the angle of attack of kite aileron, to reduce the hydrodynamic force acted on kite, this stage is known as
The energy consumption stage；
Step 4: being recycled by control and the release stage acts on the hydrodynamic force size on kite, in entire systemic circulation rank
Section, energy output is greater than the energy requirement of recycling kite, then the output of net energy can be realized.
Beneficial effect
The invention proposes a kind of system of underwater power generation and method suitable for low-speed flow sea area, this method is greatlyd improve
The relative velocity of power generator and water flow, can dramatically increase power generation output power, emphasis solves conventional fixed-type water wheels
The machine electricity-generating method problem low in deep-sea low speed draining area power generation output power.The underwater kite of tether used by the method for the present invention
System structure is simple, novel, longevity of service, and energy conversion efficiency-cost ratio is high.The method of the present invention is to make full use of the underwater energy in deep-sea
Source provides a kind of reliable, efficient mode.
Detailed description of the invention
Fig. 1 is the underwater kite system schematic diagram of tether.
1- fixed buoy platform, 2- ocean surface, 3- mooring cable, the left side 4- tether, the right side 5- tether, the ocean current side 6-
To, the underwater kite of 7- (the band hydraulic turbine, load cabin etc.), the underwater kite direction of motion of 8-, 9- figure of eight motion profile.
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
The present invention proposes a kind of underwater kite system of tether to improve the speed of related movement of power generator and water flow.Tether
Underwater kite system is made of fixed buoy platform, tether, underwater kite, by the pulling force of tether with it is preset on kite aileron
Rudder angle realizes the underwater figure of eight movement of kite.Underwater kite movement velocity formula are as follows: Vk=(2L/3D) Vc.Wherein, Vk
For underwater kite movement velocity, Vc is local water velocity, and L/D is the lift coefficient of kite and the ratio of resistance coefficient.Generally
In the case of, the underwater kite movement velocity of tether at least can achieve 4-6 times of local water velocity.It is lower in average current velocity
Deep sea waters, this method can significantly improve the speed of related movement of power generator and water flow, be that a kind of to be suitable for deep-sea low
The underwater power generation method in speed stream sea area, this method can dramatically increase power generation output power in deep-sea low-speed flow sea area.
In order to improve the power generation output power in deep-sea low-speed flow sea area, the present invention proposes a kind of underwater kite system of tether
The speed of related movement of power generator and water flow is improved, this method is a kind of underwater power generation suitable for deep-sea low-speed flow sea area
Method, this method can dramatically increase power generation output power in deep-sea low-speed flow sea area.
A kind of the technical solution adopted by the present invention to solve the technical problems: underwater hair suitable for deep-sea low-speed flow sea area
Method for electrically, its main feature is that including the following steps:
Step 1: the building underwater kite system of tether.The underwater kite system of tether is by fixed buoy platform, tether, kite
(band aileron), the hydraulic turbine, rudder plate, load cabin composition.Underwater kite is tethered on fixed buoy platform by tether flexible.
Buoy platform is fixed on the water surface (or water-bed), is discharged in underwater kite to water.The hydraulic turbine is mounted below rigid aileron, is used
In realization energy conversion.Rudder plate is mounted on aileron two sides.Load cabin is mounted on aileron down either side, and inside is mounted with comprehensively control
Unit, battery and motor.Load cabin plays increasing surely simultaneously, passes through UG and models its determining specific installation site.Load cabin
The reciprocation with the hydraulic turbine is realized by the mating transition form of gear.Comprehensively control unit is at the information of underwater kite system
Unit is managed, the integrated management of underwater kite system timing process is on the one hand used for, on the other hand for controlling the inclined of aileron rudder angle
Turn.Underwater kite is calculated needed for movement by carrying sensing element real-time perception oneself state by comprehensively control unit
The spindle movement of kite can be achieved then by preset deflection rudder angle in rudder angle under the action of water flow, meanwhile, in tether elasticity
The figure of eight movement of underwater kite is realized under the action of power.
Step 2: using the underwater kite system electricity-generating method of tether.Using the underwater kite system power generation groundwork of tether
Principle are as follows: by the hydrodynamic force on flow action under water kite aileron, move kite with stream, so that tether is tensed, so that
The axial hydraulic turbine is pivoted, and exports electric energy, this stage is known as energy output stage.After tether is tightened, in tether elasticity
Power acts on lower kite and starts recycling movement.By α & δ it is found that the kite angle of attack changes with the variation of rudder angle.Recovery stage can
To reduce the angle of attack of kite aileron by the size for changing rudder angle, to reduce the hydrodynamic force acted on kite, this rank
Section is known as the energy consumption stage.The hydrodynamic force size on kite is acted on by control recycling and release stage, is entirely being followed greatly
Loop order section, energy output is greater than the energy requirement of recycling kite, then the output of net energy can be realized.
Step 3: carrying out modeling analysis to the underwater kite system electricity-generating method of tether.
A) modeling of underwater kite system.The movement of underwater kite system is derived by Euler-Lagrange equation (formula 1)
Governing equation (formula 2).
In formula, K indicates that kinetic energy, V indicate potential energy；uiExpression, which acts on, can influence kite pitching, yaw and cross on kite
The control moment of rolling；FdiAnd FliIt is sensu lato resistance and lift.
B) the liter resistance model of kite aileron is established.It obtains acting on kite by using NACA0015 aerofoil profile model emulation
Hydrodynamic lift efficiency on aileron.
In formula, α indicates the angle of attack, CLIndicate lift coefficient.
The resistance acted on kite aileron includes parasite drag and induced drag two parts.
In formula, CD,iIndicate induced drag coefficient；Coefficient of parasite drag CD,O=0.05.
C) resistance model of the hydraulic turbine is established.
In formula, the resistance coefficient of the hydraulic turbine is C 'T；Inducible factor a is modified to obtain by hydraulic turbine inlet area.
D) by combine a), b), c) the available lift and resistance acted in kite system.
CD,total=CDW+CT′ (7)
L=CLW·q∞SW, D=CD,total·q∞SW (8)
In formula, CLWIndicate that total life coefficient, L indicate lift；CD,totalIndicate total drag coefficients, D indicates resistance.
E) the power output model of the hydraulic turbine is established.
In formula,Indicate the power output factor of the hydraulic turbine, P indicates the instantaneous power output of the hydraulic turbine.
Generating power by water current output power is proportional to 3 powers of speed of related movement, and deep-sea low-speed flow sea area generated output is low,
Mainly due to power generator and water flow speed of related movement it is lower caused by.The sharpest edges of this method are in deep-sea low-speed flow
Under the action of tether and preset rudder angle, underwater kite can be moved with higher speed according to the figure of eight in domain.Pass through modeling
Analysis, underwater kite movement velocity formula are as follows: Vk=(2L/3D) Vc.Wherein, Vk is underwater kite movement velocity, and Vc is locality
Water velocity, L/D are the lift coefficient of kite and the ratio of resistance coefficient.According to formula 3/4/5 it is found that kite lift resistance ratio it is big
The small size depending on the angle of attack.It is first reference with the corresponding angle of attack of kite section blade profile maximum lift-drag ratio in specific design,
Then by obtaining the corresponding angle of attack of maximum lift-drag ratio under the effect of actual elastic rope to underwater kite system modeling and simulating.It is logical
Comprehensively control unit control flaps angular deflection, the available required angle of attack are crossed, and then realizes expected lift resistance ratio coefficient.General feelings
Under condition, the underwater kite movement velocity of tether at least can achieve 4-6 times of local water velocity.It is lower in average current velocity
Deep sea waters, this method can significantly improve the speed of related movement of power generator and water flow, and then can increase power generation output
Power.
A kind of system of underwater power generation and method suitable for low-speed flow sea area proposed by the present invention, it is underwater by using tether
Kite system can realize that underwater kite movement velocity is 4-6 times of local water velocity, can significantly improve in this way
The power generation output power in deep-sea low-speed flow sea area.
Claims (2)
1. a kind of system of underwater power generation suitable for low-speed flow sea area, it is characterised in that flat including underwater kite (7), fixed buoy
Platform (1), left side tether (4) and right side tether (5), underwater kite (7) pass through left side tether (4) flexible and right side tether (5)
It is connected on fixed buoy platform (1), fixed buoy platform (1) is fixed on the water surface, is discharged in underwater kite (7) to water；Institute
The underwater kite (7) stated is equipped with aileron, the hydraulic turbine, rudder plate and load cabin, and the hydraulic turbine is mounted below rigid aileron, for real
Existing energy conversion；Rudder plate is mounted on aileron two sides；Load cabin is mounted on aileron down either side, and inside is mounted with comprehensively control list
Member, battery and motor, load cabin play increasing surely simultaneously, are modeled by UG and determine its specific installation site, and load cabin is logical
Cross the reciprocation of gear mating transition form realization and the hydraulic turbine；Comprehensively control unit is the information processing of underwater kite (7)
On the one hand unit is used for the integrated management of underwater kite system timing process, on the other hand for controlling the deflection of aileron rudder angle；
Underwater kite (7) is calculated needed for movement by carrying sensing element real-time perception oneself state by comprehensively control unit
The spindle movement of kite can be achieved then by preset deflection rudder angle in rudder angle under the action of water flow, meanwhile, in tether elasticity
The figure of eight movement of underwater kite is realized under the action of power.
2. a kind of underwater power generation method realized using system described in claim 1, it is characterised in that steps are as follows:
Step 1: being first reference with the corresponding angle of attack of kite section blade profile maximum lift-drag ratio, then by underwater kite system
Modeling and simulating obtains the corresponding angle of attack of maximum lift-drag ratio under the effect of actual elastic rope；Rudder angle is controlled by comprehensively control unit
Deflection, the available required angle of attack, and then realize expected lift resistance ratio coefficient；Meet underwater kite movement velocity at least may be used
To reach 4-6 times of local water velocity；
Step 2: by the hydrodynamic force on flow action under water kite aileron, moving kite with stream, to tense tether, make
It obtains the axial hydraulic turbine to be pivoted, exports electric energy, this stage is known as energy output stage；
Step 3: after tether is tightened, kite starts recycling movement under tether resilient force, passes through change in recovery stage
The size of rudder angle is to reduce the angle of attack of kite aileron, to reduce the hydrodynamic force acted on kite, this stage is known as energy
The consumption stage；
Step 4: it is recycled by control and the release stage acts on the hydrodynamic force size on kite, in the entire systemic circulation stage, energy
Amount output is greater than the energy requirement of recycling kite, then the output of net energy can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811207860.7A CN109441694A (en) | 2018-10-17 | 2018-10-17 | A kind of system of underwater power generation and method suitable for low-speed flow sea area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811207860.7A CN109441694A (en) | 2018-10-17 | 2018-10-17 | A kind of system of underwater power generation and method suitable for low-speed flow sea area |
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| CN109441694A true CN109441694A (en) | 2019-03-08 |
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| CN201811207860.7A Pending CN109441694A (en) | 2018-10-17 | 2018-10-17 | A kind of system of underwater power generation and method suitable for low-speed flow sea area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454320A (en) * | 2019-08-09 | 2019-11-15 | 中国科学院电工研究所 | A kind of ocean current energy generator |
| CN112229600A (en) * | 2020-09-09 | 2021-01-15 | 中国航天空气动力技术研究院 | Towing tank test device and method for underwater power generation kite |
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