DESIGN OF RECOVERY ENERGY SYSTEM ORGANIC RANKINE CYCLE WITH GE CLEAN CYCLETM 125 KW MODULE AT GEOTHERMAL POWER PLANT

• Main Author: Parmahan, Willfreed
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61862
• Institution: Institut Teknologi Bandung

Indonesia is a country that has vast geothermal energy source. The installed capacity of geothermal in Indonesia is around 1,3435 GW. Geothermal fields in Indonesia have the characteristics of liquid dominance. This fields produce brine that still has a thermal potential. Organic Rankine Cycle (ORC) system is a system that utilizes the thermal potential of the brine. However, the brine still contains minerals such as silica. The silica content in brine can cause a scaling process in an evaporator. The deposits will interfere with the performance of the evaporator and could make the evaporator unreliable. One way to maintain a performance of the evaporator towards the deposition of silica scaling is designing a reliable recovery energy system. This system will provide two evaporators arranged in parallel. The evaporator does not work at the same time but one evaporator will be a stand by equipment and will be switched until a specified parameter is reached. This research is conducted to design a recovery energy system and evaporator with ORC modules that already availaible in the market, namely GE Clean CycleTM 125kW. The result of the design will be anlyzed from the techno-economic aspect to achive the optimum result. Based on the design result with HTRI, the evaporator that fullfilled the DR&O and TEMA standard is AKL type with 1,57% overdesign. The result of optimizing the techno-economic aspect of the work reduction of the selected system is a decrease in work up to 113,75 kW with IRR value 10,57%, PBP 9 years, and NPV 229.383,98 USD.