The Experts below are selected from a list of 858 Experts worldwide ranked by ideXlab platform

Adel Yavarinasab - One of the best experts on this subject based on the ideXlab platform.

  • Hydrodynamic analysis of spiral wound reverse osmosis membrane recovery fraction and Permeate water Flow Rate
    Desalination, 2017
    Co-Authors: Morteza Taherinejad, Shahram Derakhshan, Adel Yavarinasab
    Abstract:

    Nowadays spiral wound membrane modules are the most common type of modules used for reverse osmosis (RO) because its packing density is fairly high. This study focused on how geometric and operating parameters affect the two main SWM parameters: the recovery fraction and the Permeate water Flow Rate. The hydrodynamics of Flow was expressed by presenting an approximate model. The mathematical procedure yielded to the pressure equations for retentate and Permeate channels. The permeability of the retentate channel was considered as a function of the spacer geometry and the Reynolds number. There is a certain membrane's length and width that the maximum recovery and the Permeate Flow Rate is obtained but this cannot be always as a practical condition. For instance, according to RO module BW30-400 in considered operating conditions, the membrane length to the width ratio of about 3.6 is predicted for a maximum recovery. Finally, the sensibility analysis of main operating conditions on the Permeate Flow Rate was pursued. The operating pressure, the retentate channel pressure drop and the spacer diameter influence the Permeate Flow Rate and flux significantly. About 10% increase in Permeate flux and Flow Rate is predicted for 15% increase in mentioned parameters.

Morteza Taherinejad - One of the best experts on this subject based on the ideXlab platform.

  • Hydrodynamic modeling of the spiral-wound membrane module including the membrane curvature: reverse osmosis case study
    Korean Journal of Chemical Engineering, 2019
    Co-Authors: Morteza Taherinejad, Mahdi Moghimi, Shahram Derakhshan
    Abstract:

    This study presents an integRated analytical model for the hydrodynamic behavior of the spiral-wound membrane element considering the curvature of the Flow feed and Permeate channels. The new model introduces a set of closed-form expressions for the output parameters of the Permeate Flow Rate, fluid recovery fraction, and the permeation flux, which can be a necessary tool for optimization and evaluation of the parameters involved in the problem. Accordingly, the results were set forth for a reverse osmosis water treatment SWM element. The difference in the output parameters for the solutions with flat and curved membranes was investigated, and the consequences of the common assumption of the flat-sheet membrane were examined mathematically. It was found that neglecting the membrane curvature implements a significant impact/error on the prediction of the Permeate channel pressure and membrane width with maximum permeation Rate, whereas its impacts on feed channel pressure and output parameters are insignificant, especially for the considered reverse osmosis case study. Also, the curvature effect on the solution can be magnified by three parameters of the membrane width: Permeate channel permeability, and membrane resistance.

  • Hydrodynamic analysis of spiral wound reverse osmosis membrane recovery fraction and Permeate water Flow Rate
    Desalination, 2017
    Co-Authors: Morteza Taherinejad, Shahram Derakhshan, Adel Yavarinasab
    Abstract:

    Nowadays spiral wound membrane modules are the most common type of modules used for reverse osmosis (RO) because its packing density is fairly high. This study focused on how geometric and operating parameters affect the two main SWM parameters: the recovery fraction and the Permeate water Flow Rate. The hydrodynamics of Flow was expressed by presenting an approximate model. The mathematical procedure yielded to the pressure equations for retentate and Permeate channels. The permeability of the retentate channel was considered as a function of the spacer geometry and the Reynolds number. There is a certain membrane's length and width that the maximum recovery and the Permeate Flow Rate is obtained but this cannot be always as a practical condition. For instance, according to RO module BW30-400 in considered operating conditions, the membrane length to the width ratio of about 3.6 is predicted for a maximum recovery. Finally, the sensibility analysis of main operating conditions on the Permeate Flow Rate was pursued. The operating pressure, the retentate channel pressure drop and the spacer diameter influence the Permeate Flow Rate and flux significantly. About 10% increase in Permeate flux and Flow Rate is predicted for 15% increase in mentioned parameters.

Essameddin Badreddin - One of the best experts on this subject based on the ideXlab platform.

  • CCA/ISIC - Control of small reverse osmosis desalination plants with feed water bypass
    2009 IEEE International Conference on Control Applications, 2009
    Co-Authors: Adrian Gambier, Essameddin Badreddin
    Abstract:

    Small reverse osmosis desalination plants without pH control normally use a feed water bypass to modify the Permeate conductivity by mixing a little amount of feed water with the Permeate. Plants with this characteristic have a different system configuration and the conductivity is usually not controlled. In this contribution, small plants with feed water bypass are studied from the dynamic point of view and a multivariable receding horizon controller is applied for the simultaneous control of Permeate Flow Rate and conductivity. Results show the advantages of including the conductivity of Permeate as well as the excellent performance of the designed controller.

  • Control of small reverse osmosis desalination plants with feed water bypass
    2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC), 2009
    Co-Authors: Adrian Gambier, Essameddin Badreddin
    Abstract:

    Small reverse osmosis desalination plants without pH control normally use a feed water bypass to modify the Permeate conductivity by mixing a little amount of feed water with the Permeate. Plants with this characteristic have a different system configuration and the conductivity is usually not controlled. In this contribution, small plants with feed water bypass are studied from the dynamic point of view and a multivariable receding horizon controller is applied for the simultaneous control of Permeate Flow Rate and conductivity. Results show the advantages of including the conductivity of Permeate as well as the excellent performance of the designed controller.

Zaher Mundher Yaseen - One of the best experts on this subject based on the ideXlab platform.

  • Efficiency evaluation of reverse osmosis desalination plant using hybridized multilayer perceptron with particle swarm optimization
    Environmental Science and Pollution Research, 2020
    Co-Authors: Mohammad Ehteram, Sinan Q. Salih, Zaher Mundher Yaseen
    Abstract:

    The scarcity of freshwater causes the necessity for water delineation of brackish water. Reverse osmosis (RO) is one of the popular stRategies characterized with lower cost and simple processing procedure compared to the other desalination techniques. The current research is conducted to investigate the efficiency the RO process based on one-week advance prediction of total dissolved solids (TDS) and Permeate Flow Rate for Sistan and Bluchistan provinces located in Iran region. The water parameters including pH, feed pressure temperature, and conductivity are used to construct the prediction matrix. A newly hybrid data-intelligence (DI) model called multilayer perceptron hybridized with particle swarm optimization (MLP-PSO) is developed for the investigation. The potential of the proposed MLP-PSO model is validated against two predominate DI models including support vector machine (SVM) and M5Tree (M5T) models. The results evidenced the potential of the proposed MLP-PSO model over the SVM and M5T models in predicting the TDS and Permeate Flow Rate. In addition, the proposed model attained lower uncertainty for the simulated data. Overall, the feasibility of the hybridized MLP-PSO achieved remarkable predictability for the RO process.

Shahram Derakhshan - One of the best experts on this subject based on the ideXlab platform.

  • Hydrodynamic modeling of the spiral-wound membrane module including the membrane curvature: reverse osmosis case study
    Korean Journal of Chemical Engineering, 2019
    Co-Authors: Morteza Taherinejad, Mahdi Moghimi, Shahram Derakhshan
    Abstract:

    This study presents an integRated analytical model for the hydrodynamic behavior of the spiral-wound membrane element considering the curvature of the Flow feed and Permeate channels. The new model introduces a set of closed-form expressions for the output parameters of the Permeate Flow Rate, fluid recovery fraction, and the permeation flux, which can be a necessary tool for optimization and evaluation of the parameters involved in the problem. Accordingly, the results were set forth for a reverse osmosis water treatment SWM element. The difference in the output parameters for the solutions with flat and curved membranes was investigated, and the consequences of the common assumption of the flat-sheet membrane were examined mathematically. It was found that neglecting the membrane curvature implements a significant impact/error on the prediction of the Permeate channel pressure and membrane width with maximum permeation Rate, whereas its impacts on feed channel pressure and output parameters are insignificant, especially for the considered reverse osmosis case study. Also, the curvature effect on the solution can be magnified by three parameters of the membrane width: Permeate channel permeability, and membrane resistance.

  • Hydrodynamic analysis of spiral wound reverse osmosis membrane recovery fraction and Permeate water Flow Rate
    Desalination, 2017
    Co-Authors: Morteza Taherinejad, Shahram Derakhshan, Adel Yavarinasab
    Abstract:

    Nowadays spiral wound membrane modules are the most common type of modules used for reverse osmosis (RO) because its packing density is fairly high. This study focused on how geometric and operating parameters affect the two main SWM parameters: the recovery fraction and the Permeate water Flow Rate. The hydrodynamics of Flow was expressed by presenting an approximate model. The mathematical procedure yielded to the pressure equations for retentate and Permeate channels. The permeability of the retentate channel was considered as a function of the spacer geometry and the Reynolds number. There is a certain membrane's length and width that the maximum recovery and the Permeate Flow Rate is obtained but this cannot be always as a practical condition. For instance, according to RO module BW30-400 in considered operating conditions, the membrane length to the width ratio of about 3.6 is predicted for a maximum recovery. Finally, the sensibility analysis of main operating conditions on the Permeate Flow Rate was pursued. The operating pressure, the retentate channel pressure drop and the spacer diameter influence the Permeate Flow Rate and flux significantly. About 10% increase in Permeate flux and Flow Rate is predicted for 15% increase in mentioned parameters.