روزبه مفیدیان

Membrane Distillation (MD) is constantly acknowledged in the research literature as a promising technology for the future of desalination, with an increasing number of studies reported year after year. MD processes encompass various configurations designed for liquid separation applications. Four primary MD configurations are Direct Contact Membrane Distillation (DCMD), Air Gap Membrane Distillation (AGMD), Vacuum Membrane Distillation (VMD), and Sweeping Gas Membrane Distillation (SGMD). However, real MD applications still lag with only a few pilot-plant tests universal. The absence of technology transfer from academia to industry is caused by important gaps between its fundamental basis and the process design. MD has the potential to recover both chemicals and water. This review paper describes the background and properties of interest for desalination processes and reviews the recent literature for novel compounds used in membrane processes. The advantages and disadvantages of using particular methods, examples of applications, and integrated processes are pronounced. Perspectives, benefits, and limitations are also discussed.

In this paper a numerical study is presented with the aim of evaluating the
performance of using curved stator blade on Vertical Axis Wind Turbine (VAWT). The flow over the Savonius turbine was assumed to be twodimensional (2D), viscous, turbulent and steady. Simulations were performed in a Computational Fluid Dynamics CFD software FLUENT, using Reynold’s Averaged Navier-Stokes Equations (RANSE) solver with unstructured mesh. Turbulence was modeled with the k-e model. The effects of varying Reynolds number and stator blade have been investigated. The static torque values of the rotor have been measured by experiments and calculated by numerical analysis, and finally they have been compared. The best results have been obtained by means of the rotor with curtain. This simulation determines the aerodynamic behavior of the rotor and stator blade. Torque coefficients have been investigated in this present research work by measuring the pressure distribution on the blade surfaces at various wind angles. For the turbine, the numerical results of pressure and torque were compared for the two cases. From the Simulation data it can be concluded that the torque and performance of VAWT increase with stator blades.