Technology And Simulation Of Sea Water Desalinaiton Device Directly Dirven By Tidal Current Energy

Using renewable energy to provide energy for the desalination is currently theresearch hotspot. Approach taken by most existing programs is that renewable energyis first converted into electrical energy stored in the battery, and then use electricenergy for desalination. Use of battery will increase investment, waste batteries cancause serious environmental problems. Response to these shortcomings, this paperproposes a new desalination program, this method is that the turbines convert the tidalcurrent energy into rotational mechanical energy, mechanical energy is then used todirectly drive a reverse osmosis desalination device manufacturing fresh water, doesnot require electrical energy conversion. Program involves a series of key issues.Through computer simulation and experimental flume scaled carried out research onthese issues, as follows:1). According to the analysis of island resource and the tidal currents resourceproposed the overall design scheme. Apparatus comprises three main parts: theturbine section, the power transmission portion, the reverse osmosis section.2). In order to meet the low flow of tidal currents, low flow efficient turbinestructural parameters are designed, such as turbine blade airfoil, turbine radius, thenumber of blades, angle of attack, etc. Through rational design so that it can generateenough torque to drive the high-pressure pump of reverse osmosis equipment. Theface of strong electrolyte corrosive marine harsh environment, to explorecost-effective sealing and corrosion protection solutions. Using magnetic coupling ofthe power transmission to solve the problem of dynamic sealing power transmission,and the use of non-metallic materials to solve the problem of seawater corrosionbearings and spindles. Streamlined design, the use of non-metallic material as thehousing, with sufficient strength, to resist seawater corrosion and damage of thewaves, ensuring the long life in the marine environment. Improved the relativematurity of the reverse osmosis system through energy recovery.3). According to similar principles of fluid mechanics and similar relationships,The design of the program was scaled computer simulation to get the turbine-relateddata to verify the reasonableness of turbine design, sure to select the key parametersto correct design biased, Verify the feasibility and rationality of the overall design byScaled tank experiments,finally estimate the water production.The biggest advantage of direct drive mode using mechanical energy is that noelectric energy transformation, reducing equipment investment and avoid batterywaste pollution, more conducive to environmental protection, low-carbon emissions,while making the overall system efficiency is improved, the difficulty lies in how to solve the power transmission sealing and low flow energy harvesting. Simulation andexperimental results show that the flow rate of0.6m/s tide conditions direct-drivemechanical energy desalination is entirely feasible.