Comparative Analysis of Feed Water Temperature Before and After the Economizer on the Efficiency of a 240 Ton/Hour CFB Boiler

Abstract

Increasing operational efficiency in power generation systems is crucial in overcoming the increasing energy demand, especially in the industrial sector. One solution to improve the efficiency is to optimize the use of economizer in the boiler of Steam Power Plant (PLTU). This study analyzes the impact of using an economizer in a 240 ton/hour capacity CFB boiler at PT X on system efficiency and fuel consumption. The results of the analysis show that the use of an economizer can increase the average feed water temperature from 207.73°C to 298.96°C, with a temprature increase of 91.23°C. This temperature increase reflects the economizer's ability to utilize flue gas heat to heat the feed water, which has an impact on reducing fuel consumption by 17.18%, from 45716.56 kg/hour to 37862.50 kg/hour. The boiler efficiency also increased significantly, from 68.36% to 82.54%, which shows the positive impact of the economizer on boiler performance. This study concludes that the use of economizer can improve energy efficiency and reduce fuel consumption, and is recommended to be applied to large capacity boiler systems to optimize energy savings and operational efficiency. Further research is needed to explore the influence of other variables on economizer and boiler performance in more depth.