Evaluation of Performance Salak Geothermal Power Plant #1 based on Exergy Analysis

Abstract

This study presents an exergy analysis of the Mount Salak Geothermal Power Plant Unit #1 to evaluate its thermodynamic performance and identify inefficiencies. Exergy analysis is employed to assess operational efficiency by considering both energy quantity and quality. Real operational data and CycleTempo simulation software were used to analyze key components, including the turbine, condenser, and gas removal system. Results indicate that the overall exergy efficiency of the system is 66.88%, with the highest exergy losses occurring in the turbine (13.76%) and condenser (10.01%). Two scenarios were simulated to improve performance: (1) adjusting turbine inlet pressure to 7.02 bara and (2) optimizing condenser pressure to 0.10 bara. These adjustments resulted in an increase in overall exergy efficiency to 68.81% and improved power output. The study emphasizes the importance of maintaining optimal operational parameters and addressing component inefficiencies to enhance power generation and extend the plant's operational life. It also highlights the value of exergy analysis as a tool for identifying potential improvements, offering valuable insights for operators seeking to optimize efficiency, reduce energy losses, and ensure the long-term sustainability of geothermal power plants.