DESIGN OF GOSWAMI CYCLE ON OCEAN THERMAL ENERGY CONVERSION POWER PLANT IN FLORES SEA

• Main Author: Hikmat Irham Maulana, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66615
• Institution: Institut Teknologi Bandung

DESIGN OF GOSWAMI CYCLE ON OCEAN THERMAL ENERGY CONVERSION POWER PLANT IN FLORES SEA Muhammad Hikmat Irham Maulana NIM. 18018020 ABSTRACT Overtime, technology has grown, and the world is entering a modern era. In this modern era, human needs are increasing, especially in electricity Most of the existing power plants still use fossil fuels and only utilize renewable energy by 11%. However, fossil fuels are not very environmentally friendly, and nor good human health. On the other hand, Indonesia is an archipelagic country with 2/3 of its area is water. Therefore, the use of renewable energy needs to be maximized. Ocean Thermal Energy Conversion (OTEC) is a type of renewable energy that has great potential considering that Indonesia is a tropical country. In this study, the implementation design of the Goswami Cycle was carried out at the proposed OTEC power plant in the Flores Sea using EBSILON Professional software. The Flores Sea has an average surface temperature of 29.14?C and an average deep-sea temperature of 4.58?C which was obtained with the help of Ocean Data View software. From the Goswami cycle simulation, it is known that the use of a 95%- 5% ammonia-water mixture as a working fluid with a turbine inlet pressure of about 11.8 bar, an absorber output temperature of 6°C, and a rectifier output temperature of 37°C produces the highest efficiency, which is 23.88%. Variations in turbine inlet pressure affect the amount of enthalpy at the turbine inlet side and the vapor flow rate that enters the turbine. Meanwhile, variations in the output temperature of the absorber and rectifier have more influence on the amount of mass flow that is divided into the two outlets of the rectifier. The development of OTEC is considered economically unfeasible for a small capacity, but quite feasible for 1 MW size by seeing the value of BCR, NPV, IRR, DPP, and LCOE. Keywords: OTEC, Goswami cycle, working fluid, thermal efficiency