Failure Analysis of Gas Turbine Generator (GTG) 14.25 MW Case Study: GTG Kujang 1B’s Failure at January 19th 2013.

• Main Author: Fendy Pratama, Arfianto
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/40795
• Institution: Institut Teknologi Bandung

Gas Turbines which is used in industries, especially for power generating, must be working optimal and efficient as high as possible. Therefore, the reability and availability of the gas turbine shall have a high value. In the end of 2009, GTG Kujang 1B had a catastrophic failure due to first stage turbine nozzle had been sustained creep-low cycle fatigue. In January 2013, GTG Kujang 1B experienced failure by similar modus therefore failure analysis must be conducted to find the root cause, so we could prevent it from failure in the future. Reability analysis has to be done to obtain information whether the operation and maintenance of the Gas Turbine Generator (GTG) Kujang 1B is doing well or not. Before the calculation of reability paramaters begins, GTG downtime datas must be classified to two type of time (shutdown time and breakdown time). This happens due to receive more accurate results. To get perfomance paramaters of GTG Kujang 1B, particularly turbine inlet temperatur (TIT) and combustion process. These calculations are used to assist in conducting failure analysis of GTG. GTG’s failure occured because of the turbine nozzles in the first stage had failed. This nozzle had been failed by creep due to the combustion gases flew continually with high temperature. The damaged nozzle which was being degraded because its toughness had been weaken was causing FOD to lower stage of the turbine.