Evaluation of hybrid ocean thermal energy conversion system plantwide performance

Abstract Ocean Thermal Energy Conversion (OTEC) is a renewable energy source in which produced by converting the heat stored sea or ocean thermal into valuable work, based on temperature difference between warm surface seawater and cold deep seawater. One of OTEC system requirements to have at minimum 20 °C within depth 1000 m below level. Recognizing importance optimum water temperature, several studies been conducted optimize system. However, none these was attempted under hybrid conversion (H-OTEC) setup. A H-OTEC combination closed-cycle open-cycle The objective this study evaluate performance process impact variation simulating Aspen HYSYS used as chemical simulation platform for conducting study. After model completed, verification test before simulated data recorded. pump work input turbine output were acquired determine net power efficiency. output, Carnot efficiency, efficiency recorded approximately 1.39 kW, 5.7%, 1.45%. efficiencies every 1 increment temperature. results showed that increased slightly 0.5kW, with both cycle actual cycle, be less than 3% 0.1% respectively.