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Power supply is an important inhibiting factor of autonomous operation of small ocean vehicles, wave energy vibration harvest method is a viable solution. The usual vibration energy harvest device is excited by its housing frame driven by external oscillation, subject to limited vehicle geometry size, and the low frequency of ocean waves, electrical power generated is very limited. A concept vehicle...
The aim of this study is to conduct a hydrodynamic analysis of a point absorber-type floating hemisphere with Power take-off(PTO) system for an optimum design of wave energy converter(WEC). In general, to predict the behavior of WEC, the equation of floating body motion can be solved in the frequency-domain analysis. A numerical model of PTO system is usually expressed as a linear damper-spring type...
A novel anchor system which can convert fluid energy into power is designed conceptually in this paper. It combines vortex induced vibration (VIV) and piezoelectric cantilever beam. The transversed motion model of the bluff body established with Sarplaya's lift decomposition model and the bending model of cantilever beam is established with Euler-Bernoulli assumption. With the two separate model the...
Our recent work on Wave Energy Converters (WEC) introduced the ideas of a Linear Sliding WEC (LS-WEC) and an electromechanical spring, or eSpring, to dynamically control system forces and maintain resonance conditions during changing wave conditions. In that work, we assumed that the LS-WEC contained a sliding translator mass that moved on a linear track in response to buoy pitch and roll in a dynamic...
Tension leg platform (TLP) is a kind of offshore structures for oil or gas exploration in deep-water which has its special feature as partly compliant and partly rigid. Extended tension leg platform (ETLP) is the third generation of TLP which made an improvement on the basis of typical TLP structure. Extended structure is the most notable feature of ETLP which could increase the distance of groups...
Point-absorbing converters are widely applied in exploiting of the wave energy. This paper will present some results of point absorber converters by experiment measurements in regular waves. Meanwhile, the research investigates the influence of take-off damping on the power output of wave energy converter. Results demonstrate the wave energy output of three-degree wave energy device is better than...
Measurements of wind direction are sought after by a multitude of professionals in many different domains. Whether to recalibrate meteorological models or simply for leisure activities, the demand for accurate and responsive wind measurements is widespread. This study was motivated by the need to improve the responsiveness of direction measurements on yachts. Here we argue that the ideal form factor...
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