Simulasi Pemanfaatan Panas Keluaran Separator dengan Menggunakan Sistem Single Flash-Binary pada PT Geo Dipa Energi Unit I Dieng

Abstract

This study aims to analyze the potential for efficiency improvement in the Geothermal Power Plant at PT Geo Dipa Energi Unit I Dieng. The background of this research is that in a single flash PLTP, there is a separation process in the separator between the steam phase and the liquid phase, wherein in the liquid phase there is still heat that can be utilized using the Organic Rankine Cycle (ORC). This study aims to determine the net power of the single flash cycle and the clean power and efficiency of the binary single flash cycle using three different refrigerant liquids, namely R245fa, R141b, and R245ca. The research method used is a simulation using Aspen Plus software. The first stage simulates a single flash at three different times, namely morning, noon, and night. After obtaining the highest power in the single flash cycle, the selection of refrigerant liquid to be used in the ORC cycle is carried out. Furthermore, a single flash binary simulation was carried out and the net power and efficiency produced were analyzed. The results of this study show that the highest power achieved by the single flash cycle is during the day at 50.62 MW. This is influenced by the ambient temperature and the mass flow of steam entering the turbine. In the binary single flash cycle, the highest efficiency is achieved by R245fa refrigerant at 35.70%.