Reliability Analysis of Heat Recovery Steam Generator Based on Creep

Heat Recovery Steam Generator (HRSG) is a massive heat exchanger that converts exhaust gas energy from gas turbine into steam. Since HRSG operates at high temperature, the machine is subjected to structural failure such as creep damage. According to ASM Handbook Volume 11, Failure Analysis and Prevention, creep rupture can occur within a thin-section component such as steam pipes and boiler tubes with a uniform stress and high temperature such as superheater and reheater tubes in HRSG. Reliability analysis will be used to assess the reliability due to creep at superheater and reheater tubing systems. The methodology for the research is determined based on the research by Carazas et al. (2010) to determine the reliability of a HRSG from a case study. The analysis will be a stepping stone for other HRSGs reliability analysis such as the one in Universiti Teknologi PETRONAS (UTP) which use HRSG in a cogeneration power plant. With its reliability assessed, the result can be used by the maintenance team for maintenance purpose to increase production and reduce downtime.