摘要：Energy is the basic requirement for human life. At present most of the energy needs are met through fossil fuels and oil. But these are exhaustible resources. Therefore there is an urgent need all over world to tap renewable energy sources. Tides are a substantial potential source of clean renewable energy for future human generations and small communities or even individual households located near continental shorelines, straits or on remote islands with strong tidal currents. Taking an average (gρ) = 10.15kNm-3 for seawater, energy can be obtained for a tide cycle, per square meter of ocean surface: E = 1.4h2, watt-hour (5.04h2, kilojoules). The energy source estimated potential of tidal power is 10,000MW. This paper deals with the origin of tides, the energy associated with the tides and various technologies used for production of electricity using tidal energy.
