抄録
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 cm2. 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/m2 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.
