ANALYSIS OF HOLLOW-FIBER REVERSE-OSMOSIS MODULE

This paper describes a precise analytical model of a hollow-fiber reverse-osmos is module and its verification by measured module performance data. This model's features are as follows: 1) A, B values used in the model are derived from actual data at operating conditions under which there is no concentration polarization and from simulating the fiber bore-side pressure drop to be zero. 2) Fiber bore-side pressure drop and shell-side pressure drop are both considered. Because of laminar flows the Poiseuille Eq. and Ergun Eq. are adopted respectively. 3) Solution diffusion model and concentration polarization model are used as membrane transport equations. As result, the mass transfer correlation equation was obtained as Sh = 0.048 Re0.6SC1/3 This equation is usable for both brackish water-type and seawater-type reverseosmosis modules.