Power Generation of a Large Reverse Electrodialysis (RED) System Based on a Commercial ED stack

摘要

A large reverse electrodialysis (RED) power generation system based on a commercial electrodialysis stack was built. The system has 200 pairs of cation- and anion-exchange membranes whose effective membrane area was 1000 cm~2. The performance test of the RED system was performed with model seawater (0.5 M NaCl) and model fresh water (various concentrations of NaCl). The power density and gross power output of the system had a maximum value of 0.45 W/m~2 and 17.8 W, respectively, using 0.02 M and 0.5 M NaCl solutions. The calculated pumping energy was 2.76 W; hence, the net power of the system was 15.1 W.