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المؤلفManawi, Yehia M.
المؤلفKhraisheh, Majeda A.M.M.
المؤلفFard, Ahmad Kayvani
المؤلفBenyahia, Farid
المؤلفAdham, Samer
تاريخ الإتاحة2016-03-06T14:12:57Z
تاريخ النشر2014-05
اسم المنشورDesalination
المصدرScopus
المعرّفhttp://dx.doi.org/10.1016/j.desal.2014.02.028
الاقتباسManawi, Y.M., Khraisheh, M.A.M.M., Fard, A.K., Benyahia, F., Adham, S. "A predictive model for the assessment of the temperature polarization effect in direct contact membrane distillation desalination of high salinity feed" (2014) Desalination, 341 (1), pp. 38-49.
الرقم المعياري الدولي للكتاب0011-9164
معرّف المصادر الموحدhttp://hdl.handle.net/10576/4204
الملخصTemperature polarization is one of the major sources responsible for flux drop in membrane distillation systems due to the reduction in the driving force across the membrane. The present study offers a predictive model developed for the estimation of the temperature polarization coefficient across the membrane taking into consideration the simultaneous heat and mass transfer phenomena. The uniqueness of the developed model is its ability to predict the intermediate temperatures (temperatures along the flow path of the membrane sheet) which can be used to estimate the local flux and local temperature polarization coefficients as opposed to the methods used by others which estimate the TPC, using the average bulk temperatures, resulting in a tool that enables the estimation of the temperature polarization coefficient (TPC) at different operating conditions. It was found that higher feed temperatures result in higher temperature polarization effect and hence a lower TPC. It was also observed that TPC increases with feed flow rate. The highest TPC value of 0.82 was achieved for a flow rate of 3. L/min and a feed-permeate temperature system of 60-20. The use of flow promoters further enhances the performance of the DCMD system and was reflected on increasing the TPC values (0.66 for a spacer filled channel compared to 0.47 for a spacer free operation) at 1.5. L/min flow condition with 70-30 temperature system. The axially integrated local flux values predicted by the model were in good agreement with the experimentally measured fluxes.
راعي المشروعQatar University and ConocoPhillips GWSC for their financial support of this work under grants QUST-CENG Fall 12/13-22 and QUEX-CWT-11/12-5 respectively
اللغةen
الناشرElsevier B.V.
الموضوعHigh salinity feed
Hydrophobic membrane
Membrane distillation desalination
Membrane distillation modeling
Simultaneous heat and mass transfer
Temperature polarization
العنوانA predictive model for the assessment of the temperature polarization effect in direct contact membrane distillation desalination of high salinity feed
النوعArticle
الصفحات38-49
رقم المجلد341
dc.accessType Abstract Only


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