INFLUENCE OF CONFIGURATION STEAM JET EJECTOR - LRVP ON GEOTHERMAL POWER PLANT 55 MW CAPACITY

Abstract

The stability performance of geothermal power plants is maintained by the use of a gas exhaust system (GRS) to remove non-condensable gas (NCG) which is a natural element of steam. NCG will cause an increase in pressure in the condenser and affect the turbine power. Equipment commonly used in GRS is steam jet ejectors (SJE) and or liquid ring vacuum pump (LRVP). The GRS stage variation and the SJE-LRVP configuration affected the ability of the GRS to handle NCG content variations. The first stage will be using SJE with 30%, 40%, and 60% capacity and the second stage will be used SJE 130% or LRVP 2x65% capacity. The simulation results using the Cycle Tempo 5.0 software showed the increase in NCG caused an increase in condenser pressure and caused a decrease power on the GPP system. The use of 2x65% LRVP on stage two generally shows the smaller influence on GPP power (or larger GPP output power) compared to 130% SJE usage except for NCG content values smaller or equal to 0.5%.