Performance analysis and techno economy of post overhaul circulating fluidized bed boiler PLTU

All countries in the world have a high dependence on energy. Predictions of energy demand continue to increase in all countries, so savings measures are needed. One of the saving measures in the power generation industry is an overhaul. An overhaul is a maintenance activity that must be carried out periodically to maintain the NPHR performance of the power plant as it was when the initial conditions were built. This study aims to (1) determine the performance of the power plant before and after overhaul, (2) determine how the PLTU performs at 50%, 75%, and 100% load, and (3) analyze the techno-economics of overhaul activities with a serious type inspection. The results of this study explain that the three treatments of the post-overhaul loading pattern have a good impact on the PLTU, namely in the form of a decrease in the NPHR after the overhaul work. The impact of the reduced post-overhaul NPHR value at this PLTU is that it can save fuel costs of 17.5 billion rupiah per year. The cost for this overhaul work is 14.9 billion rupiah so in 1 year it can save around 2.6 billion rupiah.