Salinity-gradient-power cell's surprisingly high voltage gives it best cost-per-watt of its kind
Wednesday, July 30, 2014 - 07:00
in Physics & Chemistry
Several different methods exist for generating electricity from the mixing of salt water and fresh water, which is also called salinity gradient power (SGP). One method uses concentration cells, in which two semi-cells separated by a porous diaphragm such as filter paper are filled with solutions of different ion concentrations. However, concentration cells are not as popular as other SGP techniques because they don't perform as well, typically generating only half the voltage of other methods.