Effect of Increasing Sea Water Temperature on Performance of Steam Turbine of Muara Tawar Power Plant

Abstract

Muara Tawar Power Plant is located on the coast of Bekasi, West Java, Indonesia. Along with economic development, there are plans to reclaim the sea area around Muara Tawar Power Plant and develop it into a port and industrial estate. This could potentially lead to an increase in seawater temperature. This paper aims to determine the effect of increasing seawater temperature on the performance of steam turbine 1.4 in Muara Tawar Power Plant, which uses seawater as a condenser cooling medium. The performance indicators analyzed include the output power of the steam turbine, condenser pressure, and system efficiency. Steam turbine 1.4 has an installed output power of 225 megawatts, supplied by three heat recovery steam generators (HRSG). The analysis of the effect of rising seawater temperature on steam turbine performance was conducted using Cycle-Tempo software. The main components of the steam turbine were modeled in Cycle-Tempo and then validated by comparing with design data. Various seawater temperature values were inputted into the model to obtain the resulting output power, condenser pressure, and system efficiency. The results show that for every one degree Celsius increase in condenser cooling water temperature, the output power of the plant decreased by approximately 0.171 percent, the condenser pressure increased by approximately 5.146 percent, and the system efficiency decreased by approximately 0.168 percent.