Effect Of Crack On Force Performance Of OWC Electricity Generation And Conceptual Structure Optimization Design

The research for Oscillating Water Column(OWC)electricity generation based on the wave energy has been attracting great interest from the academia,because of its good stability and the main electricity generation is not directly connected with sea.The current research mainly focuses on improving the efficiency of the w ave energy conversion and also the stability of the continuous current.However,the research for observing the cracks in OWC made of concrete under the marine environment is rare.Therefore,the oscillating water column wave power generation equipment is used as a case study for the relevant research in the present study.Based on the working environment and the loading conditions of OWC wave energy generating device,the changes in the compression and shear strength and the chlorine ion diffusion law of concrete specimen in marine environment was investigated by the wet and dry cycle test and the full immersion test for cracked concrete specimen.The results show that the chloride ion content decreases with the increase of the distance from the surface of the specimen,and the chloride ion content tends to be stable after falling to a certain depth.The content of free chloride ion in the concrete is proportional to the crack width.A subsidiary experiment which can easily analyze the shear strength of the test piece is implemented in this study.The experimental results illustrate that although both the dry and wet cycles and the complete immersion environment have a negative effect on the mechanical properties of the cracked concrete specimen,the degree of influence is unbalanced and the shear strength of the test block is sensitive to whether there is crack with it.The effect of the wet and dry cycle on the compressive strength and shear strength of the concrete is greater than that of the whole soaking.The front wall of the OWC chamber is in the dry and wet cycle,and the lower structure of the OWC chamber is in contact with the outside water(Similar to the full soaking),so the water surface change area of lower part under the whole soaking is easily to be damaged.Therefore,more attention should be paid on the design,construction,maintenance and other aspects to reduce and control the formation of cracks to extend the service life of the oscillatory watercolumn wave power generation device.Due to the fact that it is difficult to detect and repair the inner wall of the OWC power plant during operation,this paper proposes two new types of components for implementing the conceptual optimum design of the traditional structure form,solving the problem of missing maintenance access as well as the pressure change during the maintence.The characteristics,main functions and methods of using the new components are also introduced in this paper.This exploratory innovation solves a large number of practical problem in promoting the use of OWC,achieving significantly in the new energy industrialization.