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. 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 adjustable mounting is preferably by at least one primary connection point (such as a pulley) to the reaction member in a respective track that permits movement of the connection point across the reaction member. Because the surface floats 7 are smaller than the energy capturing float 2, they do not transfer significant loads to the main structure of the reaction member 1 even in very large wave conditions.
The apparatus is not limited to the illustrated embodiments. 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.
Dolor Muscular Brazo
7, in small wave heights, by appropriate lengthening or letting out of the connection lines 4 a, 4 b,4 c,4 d, the depth D2 of the energy capturing float 2 can be very shallow (on or close to the surface S of the sea) in order to maximise the energy captured. By “setting the depth” we mean controlling in a manner whereby the precise depth can be chosen and fixed in a modifiable manner. 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. The setting means further is arranged to set the height of the reaction member from the bed of the body of water. This is achieved by the mooring lines 9 a,9 b being attached to the reaction member via winches 18 a, 18 b (similar to the winches 13 a,13 b that attach the depth setting lines to the reaction member 1 in the first embodiment).
Because the connecting lines 4 a,4 b,4 c,4 d and the depth setting lines 8 a, 8 b are all adjustable in length, the depth D2 of the both the energy capturing float 2 and the depth D1 of the reaction member 1 can be altered independently of each other whilst the entire apparatus remains afloat. 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. In preferred embodiments of the invention the connectors are of adjustable length so as to permit independent adjustment of the distance (or spacing in a vertical direction) between the energy capturing float and the reaction member, and therefore the depth of the energy capturing float in the body of water.
5) on the respective energy converter 3 a,3 b,3 c,3 d to the fullest or maximum extent such that the spacing between the energy capturing float 2 and the reaction member 1 is at a minimum. It should, however, be noted that any combination of energy capturing float 2 depth; distance between the energy capturing float 2 and the reaction member 1; and distance between the respective pulleys 5 a,5 b,5 c,5 d and the energy converters 3 a,3 b,3 c,3 d is possible. The results of our computational model of the effect of increasing the distance D3 between the energy capturing float 2 and the reaction member 1 are shown graphically in FIG. Dolor en el hueso de la mano . Referring to FIG. 10, in waves having short period, the distance D3 between the energy capturing float 2 and the reaction member 1 is reduced. Referring to FIG. 11, in long period waves the distance between the energy capturing float 2 and the reaction member 1 is lengthened.
- Ejercicios para pacientes con artrosis
- Hacer un precalentamiento antes de hacer ejercicio o actividades deportivas
- Sin copagos y con un deducible anual bajo
- Apoya la cabeza con una almohada para que la cabeza quede alineada con la columna vertebral
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. Therefore movement of the energy capturing float 2 caused by waves results in relative motion between the energy capturing float 2 and the reaction member 1. This movement is taken up by respective working strokes of the energy converters 3 a,3 b,3 c,3 d and thus exploited to produce power.
This electrical generator could take electrical power in and act as a motor to provide power to the variable speed hydraulic motor, providing reactive power to the system. The components of such a hydraulic circuit are well known and do not form part of the invention. 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. The drum 11 a (and similar drums) also provide the facility for storage of the respective connecting line 4 a (and corresponding similar connecting lines, such as those shown in other Figures) and thus facilitate the adjustment of its length. 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.
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. 4 a, 4 b,4 c,4 d etc on the respective drum is known by the relevant control system of the generator at all times. Mass tuning (as it is commonly known) allows the response of the energy capturing float 2 to be optimised for different sea states leading to an increase of the overall energy capture of the apparatus. 8, in moderate to large wave heights, the connection lines 4 a,4 b,4 c,4 d may be partially drawn in, so that the depth D2 of the energy capturing float 2 is deeper with decreased wave energy relative to that at the surface, thereby, the structure of the apparatus should not be subject to excess loads and the power take of mechanism should not have to deal with an excess of energy above its rated power.
This means that in highly energetic sea conditions, such as storms, the float will be subject to high loads. The wave powered generator can sit sufficiently high in the water that all connections to mooring lines 9 a,9 b,9 c,9 d and power umbilical 10 can be clear of the water and be easily accessible.
Tipos De Dolor De Espalda
The wave powered generator can also create its own stable service platform with all serviceable components clear of the water to enable easy access for maintenance. Furthermore the mass of the energy capturing float 2 can be adjusted as in the first embodiment by changing the ratio of air and water contained therein. Increasing the mass of the energy capturing float 2 generally tunes the response of the float to longer wave periods. The present invention relates to generators that can be used to extract energy from waves in a body of water, by converting the wave energy to more readily usable energy. Inyeccion para dolor de espalda baja . Various wave devices for generating energy from wave power have been proposed, but such devices have many limitations with no one device having the proven ability to reliably exploit the available wave power resource over the long term. Furthermore, our simulation work has shown that the ability to vary the geometry of the apparatus allows the tuning of the system to respond optimally to different sea states.
Dolor Muscular En El Pecho
1), the reaction member 1 floats on the surface S of the body of water (such as the sea) with sufficient buoyancy for it to carry all other components of the apparatus. 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.
In this embodiment, the generator has a net positive buoyancy that is resisted by tension of the flexible mooring line(s). It should be noted that in FIGS. It should be further noted that the wave period as well as the wave size influences the amount of energy in the waves, therefore the float depth can also be adjusted to wave period as well. 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. Reference will now be made to the second embodiment shown in FIGS.