Ocean Thermal Energy Conversion (OTEC) has a rich history dating back to the 19th century, with early conceptualizations by French physicist Jacques Arsène d'Arsonval. In 1930s, Georges Claude built the first OTEC plant in Cuba, though it was not efficient. In the 1970s, technological advancements rekindled interest. OTEC taps into the temperature gradient between warm surface waters and cold deep-sea waters to generate power. Though limited by high initial costs and location constraints, ongoing research aims to make OTEC more economically viable and environmentally sustainable.