| The Buoy-rope-drum wave converter is a new type of point absorption wave energy generation device,which has the advantages of low cost,low maintenance cost,strong survivability under extreme wave condition and high efficiency.The purpose of this paper is to solve the problem of low efficiency of wave converter in the first real sea trial.It is speculated that the weak spring and the flow force on the cable lead to the low efficiency of the device.In order to prove it,Aqwa and orcaflex software are used to simulate the wave converter on the sea,and the simulation results prove the speculation is right.In order to solve the above problem,the mss block reeling unit is used to replace the spring reeling unit,and the power generation efficiency of the device is maximized by adjustting the weight of the mass block.According to the optimization results,the device is reconstructed and the second real sea trial is conducted.The experimental results show that the efficiency of the prototype has been greatly improved.(1)Energy acquisition mechanics model is established by Force analysis and the expression of generating efficiency is given in heave direction.(2)Simulation is carried out by AQWA and OrcaFlex.Comparing the efficie ncy among the theoretical value,simulation value and measured value is to prov e that weak springs cause power drop of device.(3)It is put forward the scheme of replacing the spring with the weight scheme,and introduces the principle of new scheme,and the power generation efficiency model is deduced.AQWA and OrcaFlex software are used to optimize the weight to make the deivce in the best situation.(4)Through the sea trial,it is verified that the efficiency of the new scheme is significantly higher than that of the first sea trial scheme. |
PDF Full Text Request