Wave power

About: Wave power is a research topic. Over the lifetime, 2671 publications have been published within this topic receiving 41439 citations. The topic is also known as: wind wave energy & sea wave energy.

Controller of pendulum type wave power generator

Abstract: PROBLEM TO BE SOLVED: To obtain a highly economical and reliable controller performing matching control of the wave power energy and a power generation load in a pendulum type wave power generator having a high energy acquisition efficiency, in which unattended operation can be performed in a severe ocean environment without requiring an expensive and delicate electronic apparatus, e.g. a wave height meter, a computer or a servo valve, at all. SOLUTION: A pendulum type wave power generator comprises a pendulum plate 4 disposed rockingly in a water chamber, a rocking pump 5 secured to the rocking shaft of the pendulum plate, and variable capacity hydraulic motors 8 and 8' generating a rotational motion in a fixed direction by receiving pressure oil from the rocking pump. Controllers 10 and 10' being driven by the pressure of fluid in the pipeline control flow rate of the hydraulic motors to be sustained at a level proportional to the average pressure of the pump, and a pressure detector has a sufficient damper function.

Accurately specifying storm-time ULF wave radial diffusion in the radiation belts

Abstract: Ultralow frequency (ULF) waves can contribute to the transport, acceleration, and loss of electrons in the radiation belts through inward and outward diffusion. However, the most appropriate parameters to use to specify the ULF wave diffusion rates are unknown. Empirical representations of diffusion coefficients often use Kp; however, specifications using ULF wave power offer an improved physics-based approach. We use 11 years of ground-based magnetometer array measurements to statistically parameterize the ULF wave power with Kp, solar wind speed, solar wind dynamic pressure, and Dst. We find that Kp is the best single parameter to specify the statistical ULF wave power driving radial diffusion. Significantly, remarkable high energy tails exist in the ULF wave power distributions when expressed as a function of Dst. Two-parameter ULF wave power specifications using Dst as well as Kp provide a better statistical representation of storm-time radial diffusion than any single variable alone.

Wave power generator using two buoys

Abstract: PURPOSE: A wave power generator using two buoys is provided to make an energy converting process simple by preventing the influence by the difference between the rise and fall of the tide. CONSTITUTION: A wave power generator comprises a first buoy(10), a second buoy(20) and a linear generator(40). The first buoy moves up and down on seaware surface by the wave. The second buoy is inserted into the first buoy. The second buoy has relative motion to the first buoy since the second buoy has different dynamic reaction characteristic about the wave with the first buoy. The linear generator includes a generator outer tube(41), a field magnet(45) and an armature(47). The field magnet and the armature are connected to the generator outer tube or the second buoy.