With the full wavelength spacing, the rotations of outer WECs 602 will be in phase with each other, but the rotation of center WEC 601, which is half way between outer WECs 602, is 180° out of phase with the rotation of WECs 602. With center WEC 601 having four times the blade area of one outer WEC 602, it can be shown that all forces and torques cancel internally within slider 610. This allows the cluster including WEC 601 and 602 maintain position without the need for a sophisticated feedback control station, which might be needed for free floating operation. 6 supports a cluster including one center WEC 601 and four outer WECs 602 mounted on a pole 220 and a slider 610 that allows adjustment of the depth and orientation of WECs 601 and 602. Slider 610 has a support structure including a pair of trusses 612. Each WEC 601 or 602 may be structurally identical to WEC 100, 102, or 104 of FIG.
1A may be deployed with structural support on both sides in order to provide counter torques for both generators 140 as well as restraining forces to counter the lift force generated by hydrofoils 110 of generators 140. FIG. Thus, control of WECs 102 can be used for yaw movement or actuation that aligns WECs 102 with the incoming waves, and a separate yaw actuator (or motor) may not be needed in some embodiments of mounting system 300. However, yaw actuation through control of the pitching of blades 110 may increase the load on main shafts 132 at generators 140 with a large torque due to the eccentric lift force of blades 110, and that load needs to be sustained by slider 310 as well as the bearings or generators 140. Further, a connecting shaft 320 may be connected to or be an extension of the drive shafts of generators 140. Connecting shaft 320 may improve the structural strength of generators 140, in that, the main shaft of generators 140 in system 300 is effectively continuous and better able to balance opposing forces from blades 110. Dolor de pierna y cadera izquierda . When the pitch angles of the two WECs 102 are different, connecting shaft 320 may provide leverage that reduces the differential load applied to individual bearings and reduces the moment carried by the support structure of slider 310. Additionally, while two generators 140 are shown in FIG.
Foundation 1000 provides limited stiffness in the horizontal direction and may be best used for the WEC installation achieving partial or full load cancellation such as described above with reference to FIGS. FIGS. 4A and 4B show top portions of pole mooring systems in accordance with alternative embodiments of the invention employing multiple wave energy converters on a slider with a top opening. FIGS. 7, 8, 9, and 10 illustrate some examples of systems for attaching a pole to the ocean floor, and each of those systems as well as other systems that may be known in the art or subsequently developed may be employed as the bottom portion of any of above mooring systems. Accordingly, wave energy converts may need mooring systems that can secure the wave energy converters in some fashion that prevents unwanted motion of the converters but that also permits adjustment to accommodate tides and changes in the ocean waves.
- La exploración por ultrasonido no es invasiva (sin agujas o inyecciones)
- Reducir la degradación muscular («anticatabólico) ya que compensa la degradación de leucina
- Diluye el vinagre de manzana en una parte igual de agua caliente
- Paraneoplasico (cáncer de pulmón)
- Infección en la propia vejiga
Extension shaft 320 extends above the end of pole 220, and slider 310 may form a cap over pole 220 since pole 220 cannot extend past connecting shaft 320. As a result the length of sleeve 314 may need to be at least as long as the range of vertical motion of slider 310. FIG. Central shaft 132 is a bluff body from a hydrodynamic perspective and may obstruct the wave induced flow, and the obstruction of flow may degrade performance of the WEC 132, especially if vortex shedding occurs at shaft 132. FIG. No. 7,762,776, entitled “Vortex Shedding Cyclical Propeller” describes how a pitching cycle can be selected for efficient conversion of wave energy, and U.S. Pat. No. 8,100,650 describes how pitching cycles can be selected to control reactive forces encountered during conversion of wave energy. Control system 250 could particularly receive measurements of wave or ocean conditions and control linear actuator 242 so that WEC 100 including blades 110 as crests and troughs of waves pass over WEC 100. In a storm, the submergence of WEC 110 can be adjusted to be even further below the surface in order to prevent excessive loads to be imposed onto WEC 100, slider 210, or pole 220. In locations where there are tidal induced changes in ocean water level, the system can maintain a constant submergence depth of the CycWEC.