When the connecting line 4 a is to be shortened, multiple turns of the connecting line are kept on the drum to a point where a minimum length is reached when the energy capture float 2 makes contact with the reaction member 1. When the connecting line 4 a is to be lengthened, less turns of the connecting line are kept on the drum to a point where maximum length is reached and no line 4 a is stored on the drum 11 a. 9, in storm conditions (very large wave heights) the connection lines 4 a,4 b,4 c,4 d may be fully drawn in so that the energy capturing float 2 and reaction member 1 can be descended to a maximum depth, at which the risk of a very large wave causing damage to the apparatus may be mitigated. These high loads must be managed by the structure and the power take-off system, resulting in costly over-engineering of the apparatus.
Dolor Muscular Piernas
Fluid is passed from the high pressure side of the circuit to the low pressure side through a variable speed hydraulic motor which is used to turn an electrical generator. This means that in highly energetic sea conditions, such as storms, the float will be subject to high loads. Generally, the float 2 follows the orbital motion of the wave particles in an approximately circular path between successive wave peaks, in the sequence shown in arrows, from FIG.
FIG. 3 is a further perspective view showing the energy converter of FIG. In the illustrated embodiment, a single float 2 is shown, but it will be understood that more than one such float can be provided if appropriate, each with its own series of energy converters mounted on the reaction member 1, together with respective connecting lines, pulleys and tracks. The mass of the energy capturing float 2 can be adjusted by adjusting the proportion of air and water contained within the float 2. FIG. FIG. 5 shows in more detail one of the energy converters forming part of the wave generator shown in FIG.
2 (again with the energy capturing float 2 spaced from the reaction member 1) together with mooring lines 9 a, 9 b,9 c,9 d which tether the generator to the seabed B, thereby keeping the generator on station. An elbow (not shown) may be created in the mooring lines by adding a ‘floater’ (a buoyant body) or a sinker (a weighted body) to the mooring lines 9 a,9 b,9 c,9 d to permit further freedom of movement of the generator whilst ensuring that the respective mooring lines remain generally slack. It should be noted that in the first embodiment of the invention the mooring lines 9 a,9 b,9 c,9 d remain slack at all times so that the generator can move freely up and down in the water column as adjusted by the depth setting lines 8 a and 8 b connected to floats 7 a,7 b.
In contrast to the first embodiment, the second embodiment does not include surface floats 7 a,7 b and depth setting lines 8 a,8 b to control the depth D1 of the reaction member 1. Instead the mooring lines 9 a,9 b of the second embodiment control the depth of the reaction member 1 by being adjustable in length. According to the invention, the generator includes adaptable setting means for setting, over a predetermined range, the depth of the reaction member in the body of water.
Dolor Sordo Costado Derecho
Furthermore separate physical springs may be substituted for the hydraulic pre-load used in the first exemplary embodiment of the invention. A first mechanism by which the apparatus can tune its response to sea state period will be described with reference to FIGS. The above described embodiments illustrate mechanisms by which the generator according to the invention can change its geometry to adjust its response to different wave heights and sea states in order to optimise both the energy capture and survivability of the apparatus. Therefore the effect of mass tuning the main energy capturing float 2 and the effect of tuning due to adjusting the geometry of the apparatus (as described above) can be additive for a greater tuning effect. This changes the geometry of the system such that the angle α of each of the connecting lines 4 a, 4 b,4 c,4 d to the horizontal is less, which increases the constraint on the float 2 and consequently reduces the natural frequency of the system-making the response of the energy capturing float 2 better tuned to short period sea states.
The hydraulic motor 12 a is turned by the connecting line 4 a turning the drum 11 a as the energy capturing float 2 is moved by the waves. Dolor de cabeza por contracción muscular . Preferably also the or each line is of adjustable length, the length adjustment being typically achieved by winding the or each line around a respective drum. Thus the distance between the reaction member and the energy capturing float can be adjusted by winding the connector lines on or off the respective drums. When the generator according to the invention is in operation and the respective lengths of the connecting lines 4 a,4 b,4 c,4 d are constantly changing due to the motion of the waves, it is the neutral or mid stroke position that is controlled by the energy converters 3 a,3 b,3 c,3 d, and therefore the average depth D2 of the energy capturing float 2 that is adjusted. In a second embodiment of the invention, the depth setting means comprise at least one flexible mooring line of adjustable length to adjustably secure the reaction member to a bed B of the body of water.
A hydraulic pre-load can be used to create a biasing force on the respective hydraulic motor 12 a that will wind the respective connecting line 4 a back onto the drum 11 a when the force from the waves is moving the float 2 in a direction that shortens the length of the respective connecting line 4 a.
It will also be appreciated that the pulleys 5 a etc could be omitted and the energy converters 3 a etc could themselves be directly moved along the tracks with the connecting lines being fed directly onto respective drums (such as drum 11 a as shown in FIG. For example a hydraulic ram or a helical drive could be used to achieve a similar effect to the rack 15 and pinion 14 of the illustrated embodiment. FIG. 2 also shows an umbilical for connection between the reaction member 1 and the energy capturing float, the purpose of which will be described with reference to subsequent Figures. It is preferred that the energy capturing float is arranged for variation of its mass thereof by varying the proportion of air and water that it contains (typically by provision of an air supply to the energy capturing float from the reaction member and an air supply to the reaction member from the surface of the body of water (such as the sea) on which the generator according to the invention is deployed.
A start-up pump is also provided to supply initial pressure to the system. As the wave height increases, the particle orbit becomes larger, and the velocities of the particles also become larger. Therefore the change to the response of the system is also similar, and moving the pulleys 5 a, 5 c towards the respective energy converters 3 a, 3 c will increase the angle α and tune the response of the system towards longer wave period sea states. Preferred embodiments of the invention will now be described in more detail, with reference to the accompanying drawings, in which like parts are denoted by like reference numerals throughout. A further mechanism by which a generator according to the invention can tuned to varying sea states will now be described with reference to FIGS.
It should be noted that in FIGS. 18 and 19. Ejercicios para combatir el dolor lumbar . As with the first embodiment, the second embodiment comprises a submersible reaction member 1; an energy capturing float 2 that moves in response to the waves; a series of energy converters 3 a, 3 b,3 c, 3 d mounted on the reaction member 1; respective connecting lines 4 a, 4 b, 4 c,4 d of adjustable length that connect the energy capturing float 2 to the respective energy converter 3 a, 3 b,3 c, 3 d via a respective pulley 5 a, 5 b, 5 c, 5 d, each of which pulleys is adjustably mounted on a respective track 6 a, 6 b. Therefore in the second embodiment the buoyancy B1 of the energy generating float is greater than the weight W of the reaction member 1, and the net buoyancy force is resisted by tension T in the mooring lines 9 a,9 b.
- Primero, en un recipiente vierte el agua y ponla a hervir
- Quistes mamarios
- Consumo de medicamentos como las píldoras anticonceptivas y los corticosteroides
- Algunos tipos de broches utilizados para los aneurismas de cerebro
- (d) Whenever required, ingest only air so as to float the pipe wholly, wherein flow ceases
- Grupo de Estudio de Conducta y Demencias
- Sequedad de boca, nariz y ojos
As a respective pulley is moved towards the periphery, the internal (generally acute) angle between the connector and the horizontal-(which is typically the same as the orientation of the top surface of the reaction member) is reduced. 7 to 11) sufficient to ensure that the reaction member is generally below the influence of waves on the sea surface. 1. Air inlets 17 a, 17 b can be provided in the surface floats 7 a, 7 b. A power umbilical 10 is further provided to allow the energy generated by the generator to be delivered to a location where it can be used. Firstly, the way in which the generator according to the invention can adjust its energy capturing properties in response to wave height will be described, and in particular how the apparatus can limit the energy captured in extreme sea states.