Exercise Study of a seawater desalination process

7 Brochure J 2791, Filtration membranaire (OI, NF, UF) Presentation des membranes et des modules , J.C. Remigy and S. Desclaux, Techniques de I ingenieur, Genie des precedes. 

The concentration of salt in the seawater is assumed equal to 35 g L. The molar mass of sodium is 23 g and that of chlorine is 35 g. Based on this information, now  

From a process point of view, why is it so important to use small-diameter hollow fibers  

The stretching force is related to the normal stress T = aL Re -Ri), which is easily calculated under the small-angle hypothesis  

Hollow fibers used in reverse osmosis can be made of cellulose acetate or of polyamide. Maximal stresses (beyond which the material breaks) are as follows  

---