THERMODYNAMIC ANALYSIS ON KALINA CYCLE MODIFICATION TO INCREASE CYCLE EFFICIENCY AND POWER PRODUCTION OF LOW-ENTHALPY GEOTHERMAL POWER PLANT

• Main Author: Muhammad Prakasa, Farhan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/75241
• Institution: Institut Teknologi Bandung

Electricity is one of the most important aspects in a society. The demand of electricity in Indonesia has been increasing over the years. Indonesia has already had geothermal power plants which are located in 17 geothermal working areas. The total geothermal power plant capacity in Indonesia is 2.286,1 MWe. One of the potential thermodynamic cycles to increase electricity production is Kalina Cycle. This cycle can be used in a low-enthalpy geothermal power plant due to the utilization of ammonia-water mixture as its working fluid. In this research, Kalina cycle model validation has been done with Húsavík Geothermal Power Plant using Aspen HYSYS®. The deviation of the Kalina cycle model is mostly less than 3%. Five Kalina cycle modifications with KCS-34 as the reference have been performed by installing components such as expander, reheater, regenerator, and separator. Two modifications with the best performance, which are KCS-34 with expander and KCS-34 with two stage separators, have been simulated for a geothermal power plant in Lempur, Jambi. The simulation of KCS-34 modification by installing expander shows the best performance with net power of 2566,46 kW and 12% cycle efficiency. The cost estimation to build geothermal power plant using the modification is $12.023.052,03.