CHARACTERISTIC ANALYSIS OF STEAM POWER PLANT WITH COMBUSTION OF COAL AND ALBASIA WOOD

• Main Author: Mika Tjahya Indra, Anthony
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/81242
• Institution: Institut Teknologi Bandung

<p align="justify">Coal is the most widely used fuel to meet the need for electrical energy which increases every year. On the other hand, coal-fired power plants are one of the largest contributors to greenhouse gas (GHG) emissions in Indonesia which have a negative impact on the environment. One solution that can be developed to reduce emissions is by adding biomass, especially wood, in the combustion process in the PLTU boiler which has been planned in the 2021-2030 Electricity Supply Business Plan (RUPTL). Albasia trees (Albizia falcataria) or sengon could be an option because they can grow quickly in tropical climates. In this research, modeling and simulation of the combustion of a mixture of coal and Albasia wood at the PLTU Pelabuhan Ratu was carried out using Aspen Plus v11 software. Combustion is carried out in three scenarios, namely constant mass rate and volumetric fuel rate, as well as constant energy rate. This was done to analyze emissions and flue gas temperatures produced in steam turbine boilers as well as output power and efficiency with variations in albizia wood content in the fuel. The results of the analysis show that exhaust gas emissions have decreased along with the increase in the percentage of Albasia wood in the fuel. The value of the generator output power also decreases when a mixture of coal and Albasia wood is burned. However, the value of the plant efficiency increases because the percentage of reduction in the incoming heat transfer rate is higher than the percentage reduction in generator output power. The combustion temperature also decreases because the NCV of the fuel decreases. Keywords: Albasia wood, co-firing, emission, steam power plant<p align="justify">