APPLICATION OF KALINA CYCLE FOR OCEAN THERMAL ENERGY CONVERSION POWER PLANT

• Main Author: Generanta I.K., Ariel
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/56162
• Institution: Institut Teknologi Bandung

Currently, Indonesia is still very dependent on fossil fuels in generating electricity with relatively low levels of renewable energy. On the other hand, Indonesia is an archipelagic country with an ocean area of 3.25 million square meters, which of course is a huge storage of solar thermal energy. This fact supports the development of ocean thermal energy conversion (OTEC) in Indonesia. A study was conducted in the sea of North Sulawesi which has an average surface temperature of 29.47? and an average deep sea water temperature of 6.4? at a depth of 500 meters. Using the Kalina Cycle, it is known that the use of Ammonia-Ethanol 0.95/0.05 working fluid produces the highest net thermal efficiency of 4.72%. . The use of a heating condenser results in an increase in thermal efficiency of up to 6.91% especially when applied to low extraction pressures. The use of solar thermal storage increases the thermal efficiency of the cycle up to 18.08% (with ammoniaethanol working fluid 0.95/0.05) and 19.12% (with ethanol-water working fluid 0.5/0.5). The proposed OTEC generator design produces an output power of 1000kW and a net thermal efficiency of 20.17% (ammonia-ethanol 0.95/0.05); 20.31% (ethanol-water 0.5/0.5) in the cycle with solar thermal storage, and 4.97% in the design without solar thermal storage.