The Effect of Coal Calorific Value and Feed Water Rate on the Efficiency of a 10 Ton Capacity Fire Tube Boiler
Pengaruh Nilai Kalor Batu Bara dan Laju Feed Water Terhadap Efisiensi Boiler Fire Tube Kapasitas 10 Ton
DOI:
https://doi.org/10.21070/ups.8505Keywords:
Boiler Efficiency, Coal, Lower Heating Value (LHV), Fire Tube Boiler, Feed Water ConsumptionAbstract
A boiler is an energy conversion system that uses heat from fuel combustion—such as gas, diesel, or coal—to convert water into pressurized steam. PT. XXX operates a coal-fired fire tube boiler to supply steam for coconut oil production. This study analyzed boiler efficiency using the direct method, based on logsheet data from February 3, 6, and 10, 2025 (24-hour operation), with coal LHV values of 24001, 22644, and 23121 kJ/kg. The highest efficiency, 87%, occurred at LHV 24001 kJ/kg, while the lowest, 54%, occurred at LHV 23121 kJ/kg. The analysis shows a linear trend where efficiency increases with higher coal calorific value and decreases when feed water and fuel consumption rises. Conversely, efficiency improves when feed water and fuel usage drops. This indicates that both coal quality and operational parameters like feed water flow significantly influence boiler performance.
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