Model for seawater fouling and effects of temperature,flow velocity and surface free energy on seawater fouling

查看全文 作　　者：Dazhang [1]Yang;Jianhua [1,2]Liu;Xiaoxue [1]E;Linlin [1]Jiang

机构地区：[1]School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;[2]Shanghai Key Laboratory of Multi-phase Flow and Heat Transfer,Shanghai 200093,China

出　　处：《Chinese Journal of Chemical Engineering》索引2016年第24卷第5期,共7页

基　　金：Supported by the Leading Academic Discipline Project of Shanghai Municipal Education Commission(J50502);the Construction of Shanghai Science and Technology Commission(13DZ2260900) 摘　　要：A kinetic model was proposed to predict the seawater fouling process in the seawater heat exchangers.The new model adopted an expression combining depositional and removal behaviors for seawater fouling based on the Kern–Seaton model.The present model parameters include the integrated kinetic rate of deposition(k d)and the integrated kinetic rate of removal(k r),which have clear physical signi ficance.A seawater-fouling monitoring device was established to validate the model.The experimental data were well fitted to the model,and the parameters were obtained in different conditions.SEM and EDX analyses were performed after the experiments,and the results show that the main components of seawater fouling are magnesium hydroxide and aluminum hydroxide.The effects of surface temperature,flow velocity and surface free energy were assessed by the model and the experimental data.The results indicate that the seawater fouling becomes aggravated as the surface temperature increased in a certain range,and the seawater fouling resistance reduced as the flow velocity of seawater increased.Furthermore,the effect of the surface free energy of metals was analyzed,showing that the lower surface free energy mitigates the seawater fouling accumulation. 关键词：表面自由能海水污染污染模型表面温度海水流速沉积动力学实验数据动力学模型

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Model for seawater fouling and effects of temperature,flow velocity and surface free energy on seawater fouling

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