Abstract :
Electrical energy in certain areas such as coastal coasts is still limited. Sea
water is a natural resource which can be used as a source of renewable energy.
The purpose of this research was to make battery and identity the output power of
battery using sea water electrolyte with some variations of salinity which can be
used as a source of renewable energy.
The electrodes used were aluminum and copper with a cross-sectional area
of 56 cm2. The battery electrolyte variation used was seawater without treatment
(A0) and seawater by evaporation treatment from 3 kg of sea water until reduced
300 grams (B300), 600 grams (C600) and 900 grams (D900). The battery was made
of voltaic cell methods and series-parallel circuits with a total cells of 42 cells. The
next step was testing performed battery for 24 hours with data taking for every 3
hours.
From the test, the largest voltage data occurred was on the electrolyte D900
variation of 8.1 V. From the testing, the highest current occured at the initial
condition at all variations that remain the same for 0,5 mA. The highest power was
obtained from the use of water electrolytes sea with D900 evaporation treatment of
4.05 mW. For the power results in electrolyte variations A0, B300 and C600, it was
obtained the same power of 4 mW.