ABSTRACT:

The models of some wave energy converters are considered. To study physical processes of hydrodynamics in wave power converters the numerical calculations for several variants of structures like OWEC and OWSC are performed. The results of model experiments on irregular wind waves for OWSC model are presented. The new variants of converters are proposed. To improve efficiency of wave converters the additional devices for receiving and converting wave's energy are offered.

INTRODUCTION

Power industry of Kamchatka and Kuril Islands uses mainly imported fuel. Price of energy here is higher to five times than in the world due to transport costs. On the other hand, here there are favorable climatic conditions for the development of sea wave power stations. The average potential of wave energy on the east coast is estimated at 40 kW/m. If we assume, that the efficiency of wave power converters is 50%, the technical potential of wave power on the coast of 10 km long can be 150 MW - this is existing energy consumption of entire Kamchatka. Korobkov (1986), Sichkarev et. al (1989), Falnes et. al (1991) describe many patents of wave converters. Nevertheless, to achieve their practical efficiency, careful analysis and coordination of functional elements is required with taking into account real local conditions. It is known that sea waves have a wide frequency range. Power plant, designed only to large waves, will not work at weak waves, and the installation is designed only for weak waves, can be easily destroyed by storm waves. Therefore, at a designing of power plants need to lay a large reserve of strength.

OWEC MODEL

Fig. 1 shows a diagram of OWEC cross-section. Working pressure Δh is created because of overtopping waves and filling the tank between the front and back walls.

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