Abstract :
Sea water is natural resource that can be used as the source of new energy
which represents the mixture of 96,5% pure water and 3,5% other materials like
salts, dissolved gas, organic materials and disolved particles. Basically, sea water
contains high NaCl and elaborated by H2O into Na+ and Cl-. With the existence of
that free particle, electric current appears. The electric current from both loads can
be used as the source of alternative energy to generate friendly and cheap electric
energy using volta cell method.
At the volta cell method, there are electrolyte condensation, cathode and
anode. The existences of these cathode and anode cause the reaction of oxidation
and discount and also as conductor to generate electric energy from reaction of
chemistry that happen between water and salt. This research used copper electrode
(Cu) and magnesium (Mg) and sea water electrolyte to identify the effect of
electrolyte salinity variation to the power generated by sea water battery so that
applicable continuously in daily life. The sea water batteries made of copper (Cu)
electrode and magnesium (Mg) were 30 cells. They were set into seri-parallel using
sea water electrolyte without evaporation treatment and evaporation variations for
300 gram, 600 gram, and 900 gram.
From the result of battery testing, the variation of salinity effected electricity
power, voltage, and electric current. At the testing using water without treatment
of evaporation (A 0) generated 10 V voltage, 5 mA electric current, and 50 mW
electric power. Then, there were increase of voltage, electric current, and electric
power using sea water and 900 gram (D 900) evaporation generated 13 V voltage;
6,5 mA electric current; and 84,5 mW electric power. The highest output power
generated by sea water with 900 gram (D 900) evaporation was 84,5 mW