Basic design of Lumut Balai 2x55 MW geothermal power plant, Indonesia

Abstract

This report covers research activities with the objective of producing basic design documents for the Lumut Balai geothermal power plant units 1 and 2, with a total electrical output of 2×55 MWe. The methodology to accomplish this objective is to initially create a geothermal power plant model, its application through simulations and a technical analysis. Once the model is set up, then the simulation can be carried out in order to understand the performance of the geothermal power plant when responding to several different operating conditions. The following operating conditions are used as variable input parameters in the presented power plant model, wet bulb temperature and non-condensable gas content of the steam supply. In addition the behaviour of the geothermal power plant, both for rated full load operation as well as partial load operation, is simulated for a comprehensive analysis of a heat and mass balance diagram and the technical specifications of the main equipment.