Energy Optimization Modeling of Geothermal Power Plant (Case Study: Darajat Geothermal Field Unit III)

5th ITB International Geothermal Workshop

Sinaga, R.H.M.^1 ; Darmanto, P.S.^2

Engineering Management Study Program, Del Institute of Technology, Laguboti, Toba Samosir

22381, Indonesia^1

Mechanical Engineering Study Program, Bandung Institute of Technology, Bandung

40132, Indonesia^2

关键词: Energy optimization;    Engineering equation solvers;    Modelling process;    Optimum conditions;    Software versions;    Steam consumption;    Variable frequency drives;    Wet bulb temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/42/1/012017/pdf
DOI  :  10.1088/1755-1315/42/1/012017

来源: IOP

【 摘 要 】

Darajat unit III geothermal power plant is developed by PT. Chevron Geothermal Indonesia (CGI). The plant capacity is 121 MW and load 110%. The greatest utilization power is consumed by Hot Well Pump (HWP) and Cooling Tower Fan (CTF). Reducing the utility power can be attempted by utilizing the wet bulb temperature fluctuation. In this study, a modelling process is developed by using Engineering Equation Solver (EES) software version 9.430.The possibility of energy saving is indicated by Specific Steam Consumption (SSC) net in relation to wet bulb temperature fluctuation from 9°C up to 20.5°C. Result shows that the existing daily operation reaches its optimum condition. The installation of Variable Frequency Drive (VFD) could be applied to optimize both utility power of HWP and CTF. The highest gain is obtained by VFD HWP installation as much as 0.80% when wet bulb temperature 18.5 °C.