PEMILIHAN TEKNOLOGI PROSES GEOTHERMAL SECARA TEKNIS PADA PEMBANGKIT LISTRIK TENAGA PANAS BUMI DI INDONESIA

Abstract

Currently, geothermal power plants produce base load electricity is cheaper, reliable and green. However, the efficiency of conversion contained in a geothermal power plant is smaller than other fossil power plants. PT. Geo Dipa Energi unit Dieng, Central Java is one of the company's power plants in Indonesia that utilize geothermal energy in the form of steam as a prime mover with flash steam technology. Selection of flash steam process technology has been developed with the model mathematical approach based on the laws of thermodynamics using software Engineering Equation Solver (EES). In this study we can conclude that the physical quality of the steam generated from the production wells and has a temperature of 306 ⁰C and enthalpy value of 1379.7 kJ / kg, operating conditions separator used software EES is in the temperature 1000 ⁰C and pressure in 179.9 kPa with generate electric power of 13.929,63 kWe with the magnitude of the efficiency of 23,41 %. Then the simulation modeling has been carried out with a combination of single flash steam with binary cycle. This combination of technologies single flash steam and binary cycle power it produces at 18.456,24 kW with overall plant efficiency of 31,02%. It has the greatest efficiency that is referred to as selection of appropriate technology to process geothermal power plant in PT. Geo Dipa Energi unit Dieng, Central Java. While the combination of single flash technology with dual binary cycle power it produces at 18.329,768 kW with overall plant efficiency of 30,81%.