Analisis Pengaruh Metode Co firing Dengan variasi beban Menggunakan Sawdust Terhadap Efisiensi Boiler Pada PT. PLN Nusantara Power UP PLTU Indramayu

Abstract

This research was conducted at PT. PLN Nusantara Power UP PLTU Indramayu to evaluate the impact of co-firing methods using sawdust on boiler efficiency. The standard fuel content used includes ash content ≤15% (SNI 13-3478-1994) and moist water content ≤12% (SNI 13-3477-1994). The co-firing method, which mixes sawdust with coal, is used to reduce emissions and improve energy efficiency. This study analyzes boiler performance at 300 MW and 311 MW loads with sawdust mixture variations of 1% and 3%. The results show that boiler efficiency decreases when using co-firing compared to coal combustion alone. At a 300 MW load, boiler efficiency decreased from 85.550% (coal firing) to 85.302% (co-firing 1%) and 83.268% (co-firing 3%). At a 311 MW load, efficiency dropped from 86.305% (coal firing) to 85.323% (co-firing 1%) and 84.446% (co-firing 3%). This efficiency decline is due to the quality of the sawdust, an unoptimized mixing ratio, and the instability of sawdust supply. However, the use of sawdust as an additional fuel remains appropriate for reducing coal dependence and carbon emissions. It is recommended that further research be conducted to optimize sawdust quality, mixing techniques, and supply stability to achieve better efficiency.