THERMODYNAMIC ANALYSIS IN COAL SWITCHING WITH BLENDING METHOD ON OMBILIN COAL FIRED POWER PLANT USING GATE CYCLE SIMULATION SOFTWARE

• Main Author: X Adeodatus Alfa F, F
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/87801
• Institution: Institut Teknologi Bandung

In order to fulfill electricity national needs, Coal Fired Power Plants still have important role in the middle of energy transition era. National energy supply 36,85% come from Coal Fired Power Plant. In 2022, coal price rose significantly until 2024, leading to coal fired power plant operational problematic issue and need to use LRC to replace its primary fuel. Ombilin Coal Fired Power Plant is one of the CFPP which experienced derating due to LRC usage without an optimum blending composition. In order to achieve optimized blending composition with easier method, a heat balance simulation was deducted using GateCycle software. In order to get an optimized blending composition, some operational parameter such as mill capacity, combustion air and flue gas should be considered as constraints. There are 2 blending skenarios, first skenario with automatic mode Primary Air Fan Operation and the second skenario is manual mode Primary Air Fan Operation. In first blending skenario, Ombilin Coal Fired Power Plant can operate up to 100 MW but it is limited by tempering air temperature parameter as its constraint. In second blending skenario, blending optimization is limited by secondary air ratio parameter. Coal blending method will result in operating parameters change especially in boiler equipment. Higher coal flow will result in higher combustion air flow. LRC usage will also result in increased NPHR up to 60,12 kkal/kwh, but with LRC lower coal price than HRC will result in decreased fuel cost up to 15,02 million IDR / day.