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All Journal INFOKUM Jurnal Info Sains : Informatika dan Sains
Wageman A. Naiborhu
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Computer Science & IT

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A Utilization Of Oil Palm Empty Fruit Bunch Biomass As An Alternative Fuel For Steam Power Plants Wageman A. Naiborhu; Meijar Dwi Putra; Alfi S. B. Siahaan; Muhammad D. M. Lumban Tobing; Solly Aryza
INFOKUM Vol. 13 No. 01 (2025): Infokum
Publisher : Sean Institute

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The utilization of empty palm fruit bunches (EPFB) biomass as an alternative fuel for Steam Power Plants (PLTU) is a promising solution to reduce dependence on fossil fuels while increasing the utilization of palm oil industry waste. EPFB is a solid waste generated from the palm oil extraction process and has a high carbon content, making it a viable renewable energy source. This study aims to analyze the energy potential derived from the combustion of EPFB and the energy conversion efficiency in a PLTU system. The methodology includes the analysis of fuel characteristics, such as calorific value, moisture content, ash content, and combustion efficiency, compared to coal as a conventional fuel. Additionally, the study evaluates the environmental impact of utilizing EPFB as an alternative fuel, especially in terms of carbon emissions and energy efficiency. The results indicate that EPFB has an average calorific value of 15-18 MJ/kg, which is sufficient for use as fuel in co-firing systems with coal in PLTU. Using EPFB as an alternative fuel can also reduce CO₂ emissions by up to 30%compared to pure coal combustion. Economically, the utilization of EPFB can lower operational costs and support sustainable energy policies in Indonesia. Thus, the utilization of EPFB biomass in PLTU can provide an efficient and environmentally friendly renewable energy solution. Further implementation requires optimization of combustion technology and policy studies to support sustainable biomass use in power generation.
Transformer Life Prediction Analysis Based on Thermal Aging at PT Ultra Sumatera Dairy Farm Wageman A. Naiborhu; Haris Gunawan; Zuraidah Tharo
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

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A transformer is a vital component in the electrical power distribution system that functions to transfer energy from medium voltage to low voltage. The reliability of a transformer is highly influenced by the thermal condition of its insulation, which determines its service life. This study aims to predict the effective lifespan of a 1250 kVA distribution transformer at PT. Ultra Sumatra Dairy Farm uses the thermal aging method based on the IEEE C57.91-2011 standard. The data used includes nameplate information, daily load profiles, and average ambient temperature. Based on the measurements, the transformer operates at an average load of 422.7 kVA (33.8% of its rated capacity) and an ambient temperature of 23°C. The calculated results show a hottest-spot temperature of 49.55°C with an aging acceleration factor (FAA) of 0.000649. The daily Loss of Life (LOL) value of 0.00000865% indicates that thermal aging occurs very slowly. Based on the Equivalent Aging Factor (FEQA), the theoretical effective lifespan of the transformer reaches approximately 31,660 years. However, in practice, the actual lifespan of the transformer is estimated to range between 25–35 years due to non-thermal factors such as moisture, oil oxidation, and load fluctuations. These results indicate that the thermal condition of the transformer remains very safe and efficient for long-term operation.
Co-Authors Alfi S. B. Siahaan Haris Gunawan Meijar Dwi Putra Muhammad D. M. Lumban Tobing Zuraidah Tharo