CFD SIMULATION OF COFIRING OF COAL AND BIOMASS IN A600 MW STEAM POWER PLANT

• Main Author: Rahadian, Anugrah
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/83063
• Institution: Institut Teknologi Bandung

Coal-fired power plants are the main source of electricity production in Indonesia. However, coal-fired power plants produce huge greenhouse gas emissions. Combined combustion of biomass and coal is one solution to overcome the problem of transitioning from coal to renewable energy. However, the wrong biomass mixture can lead to a decrease in combustion kinerjance. Therefore, it is necessary to conduct simulations to determine the kinerjance of combined combustion. In this study, a simulation of combined combustion of biomass and coal blends will be conducted for the case study of Suralaya Unit 5-7 CFPP with a capacity of 600 MW using ANSYS FLUENT software. The simulation is conducted by comparing the combustion kinerjance of four fuel mixtures namely coal, rice husk, sawdust, and solid recovery fuel (SRF) with mass percentages of 10%, 20%, and 30% for each biomass. The results of the analysis showed that the interaction between the four fuel mixtures is quite good because it does not significantly reduce the kinerjance of the combustion process. This can be seen from parameters such as boiler efficiency and flue gas velocity profile that do not change much. The emission of combustion pollutants also decreased. CO2 emissions decreased by 87.41% or 512,3 ton/h. NOx emissions decreased by 29.61%. SO2 emissions decreased by 73.04%. There was a decrease in electrical power generated by 35.35% due to a decrease in the heat rate entering the boiler.