Abstract
In this study, we evaluated the power generation performance of a small stack with commercial ion exchange membranes in the case of using high salt solutions with the same conductivity as brine from seawater RO desalination plants, with the aim of investigating the effect of the basic properties of IEMs on power generation performance of RED stacks. FKS-20/FAS-20 showed the highest power density of 3.12 W/m2 because the membrane resistance of FKS-20/FAS-20 was lowest in all the IEMs. This indicates that the effect of the difference in the osmotic water coefficient and permselectivity in all the IEMs on the performance will be small compared to that in the
membrane resistance even when using high salinity solutions as the high concentration solution of RED stack.
