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All Journal Elektrika Borneo Eksergi: Jurnal Teknik Energi Jurnal Teknik Mesin, Industri, Elektro dan Informatika Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika
Aminullah Assagaf
Institut Teknologi PLN
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Studi Kelayakan Teknik dan Finansial Investasi PLTS dalam Memenuhi Kebutuhan Energi SPKLU PLN Kalimantan Barat Irvan Taufik Hidayat; Aminullah Assagaf
Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika Vol. 4 No. 5 (2026): September : Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Inf
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/jupiter.v4i5.1549

Abstract

The increasing adoption of electric vehicles has led to higher electricity demand at Public Electric Vehicle Charging Stations (SPKLU), requiring environmentally friendly and sustainable energy sources to support their operation. This study aims to analyze the energy requirements of the PLN West Kalimantan SPKLU, evaluate the technical performance of a Solar Power Plant (PLTS), and assess the financial feasibility of its investment. Energy demand was projected using a linear regression time-series forecasting method based on historical SPKLU energy consumption data from January 2024 to December 2050. The results show that energy demand will increase from 693.55 kWh/year in 2024 to 68,302.46 kWh/year in 2050. Based on this projection, the PLTS capacity was determined using the PV system sizing method and PVsyst simulation, resulting in a 46 kWp system with annual energy production of 70,200 kWh, a Performance Ratio (PR) of 83.11%, and a Solar Fraction (SF) of 67.14%. Financial analysis using NPV, BCR, IRR, and Payback Period indicates that the PLTS investment is feasible. This study confirms that PLTS can fulfill the energy needs of the PLN West Kalimantan SPKLU while supporting the development of the electric vehicle ecosystem and Indonesia’s clean energy transition. The increasing adoption of electric vehicles has led to higher electricity demand at Public Electric Vehicle Charging Stations (SPKLU), requiring environmentally friendly and sustainable energy sources to support their operation. This study aims to analyze the energy requirements of the PLN West Kalimantan SPKLU, evaluate the technical performance of a Solar Power Plant (PLTS), and assess the financial feasibility of its investment. Energy demand was projected using a linear regression time-series forecasting method based on historical SPKLU energy consumption data from January 2024 to December 2050. The results show that energy demand will increase from 693.55 kWh/year in 2024 to 68,302.46 kWh/year in 2050. Based on this projection, the PLTS capacity was determined using the PV system sizing method and PVsyst simulation, resulting in a 46 kWp system with annual energy production of 70,200 kWh, a Performance Ratio (PR) of 83.11%, and a Solar Fraction (SF) of 67.14%. Financial analysis using NPV, BCR, IRR, and Payback Period indicates that the PLTS investment is feasible. This study confirms that PLTS can fulfill the energy needs of the PLN West Kalimantan SPKLU while supporting the development of the electric vehicle ecosystem and Indonesia’s clean energy transition.
Evaluasi Kinerja Produksi PLTS Atap Berbasis Data Operasional dan Analisis Deret Waktu pada Fasilitas Pendidikan PLN Stozn Romeo; Aminullah Assagaf; Syamsir Abduh
Jurnal Teknik Mesin, Industri, Elektro dan Informatika Vol. 5 No. 1 (2026): Jurnal Teknik Mesin, Industri, Elektro dan Informatika
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jtmei.v5i1.6287

Abstract

Rooftop photovoltaic (PV) systems installed in working and educational facilities require data-based performance evaluation so that renewable energy contribution can be monitored and translated into operational actions. This study evaluates the production performance of the rooftop PV system at PLN UPDL Pandaan using operational data from 2024 to 2025. The method combines descriptive statistics, total yield, specific yield, year-on-year comparison, coefficient of variation, seasonal index, time series reading, and an initial battery energy storage system (BESS) scenario. The results show that annual total yield decreased from 11,332.73 kWh in 2024 to 10,520.48 kWh in 2025, equivalent to a 7.17% reduction. Specific yield also decreased from 1,365.39 kWh/kWp to 1,267.53 kWh/kWp, while the monthly coefficient of variation increased from 15.11% to 18.08%. Seasonal analysis indicates relatively high production in August and October, whereas January, February, November, and December tend to remain below the historical average. The BESS scenario shows that a 10 kWh nominal capacity can increase estimated PV utilization from 57.52% to 76.55% under the representative load profile. The findings support baseline-based operation and maintenance, monthly residual monitoring, and further continuous load measurement before implementation.
Optimization of Flue Gas Energy Exploitation via Organic Rankine Cycle System at Bangkanai Gas Engine Power Plant Arismon Saputra; Aminullah Assagaf
Eksergi Vol. 22 No. 03 (2026): SEPTEMBER 2026
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v22i03.7943

Abstract

Bangkanai Gas Engine Power Plant exhibits a substantial waste heat potential within its exhaust gas, with manifold temperatures post-turbocharger ranging from 386.40 °C to 515.00 °C. Currently, this high temperature thermal energy is underutilized. This study aims to evaluate the technical and financial feasibility of integrating an Organic Rankine Cycle (ORC) bottoming system into the exhaust stack of PLTMG Bangkanai. A dynamic computational model was constructed using the MATLAB R2023a-CoolProp platform. The thermodunamic property pf the mixed flue gas – characterized bt a molecular weight of 28.164 g/mol – were dynamically tarcked across a 24 – hour daily cycle utilizing the JANAF/NIST Shomate Polynomial functions. The simulation evaluated four working fluids (R245fa, Toluene, Benzene, R1233zd(E)) across three optimization scenarios, constrained by an acid dew point stack safety limit (≥ 160.00 °C). The results reveal that R1233zd(E) yields the most superior performance, maintaining an absolute dry vapor phase at the turbine outlet ( ) and completely eliminating turbine blade cavitation risks. The integrated ORC system successfully harvested a peak net clean power output 6,152.40 kW. This addition elevated the overall system thermal efficiency from 38.50 % to 42.10 % and reduced the Specific Gas Comsumption (SGC) by 3.66%. Eviromental assessment utilizing the Higher-Tier Tier 3 IPCC direct stoichiometry approach indicates a greenhouse gas mitigation potential of 1,382.328 Tons of per year. Financial feasibility analysis was conducted over a 20-year Power Purchase Anreement (PPA) horizon, calibrated with a 10.00% Cost Of Capital (CoC) and a flat exchange rate of Rp17,500/USD. The initial Capital Expenditure (CapEx) allocation of Rp236.87 Billion is economically viable, generating a positive Net Present Value (NPV) of +Rp49.72 Billion, an Internal Rate of Return (IRR) of 14.52%, a Benefit-Cost Ratio (B/C) of 1.177, and a Payback Period (PBP) of 8.2 years
ANALISIS SENSITIVITAS HARGA TANAH DALAM PEMILIHAN TOWER COMPACT LATTICE DAN TOWER STANDAR PADA KORIDOR SUTET 500 KV PERKOTAAN Firmansyah Rizal; Aminullah Assagaf
Elektrika Borneo Vol 12, No 2 (2026): Elektrika Borneo Edisi Oktober
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/eb.v12i2.7505

Abstract

The development of 500 kV Extra High Voltage Overhead Transmission Lines in urban areas is constrained by limited land availability and high land acquisition costs. This study evaluates the technical and financial feasibility of the 18.3 km Muara Tawar–Bekasi transmission corridor by comparing Compact Lattice Towers and conventional towers using technical, financial, and land-price sensitivity analyses. Unlike previous studies that focused on individual tower characteristics, this research adopts a transmission corridor-based approach integrating technical performance, spatial requirements, land costs, and investment feasibility. The results show that both tower designs satisfy technical requirements. Compact Lattice Towers reduce the right-of-way width from 34 m to 28 m, lowering land acquisition costs by 54.0% and ROW costs by 17.2%, although construction costs increase by 29.3%. Both alternatives remain financially feasible, with NPV values exceeding IDR 3.1 trillion and IRR values of approximately 21%. Sensitivity analysis identifies land price as the dominant factor influencing tower selection, with an economic break-even point of approximately IDR 2.57 million/m².
Optimisasi Sistem Suplai Pembangkit pada PT PLN (Persero) Labuhan Aji Nusa Tenggara Barat Umar Farouk Andy Saputro; Aminullah Assagaf
Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika Vol. 4 No. 5 (2026): September : Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Inf
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/jupiter.v4i5.1702

Abstract

Isolated power systems in archipelagic regions commonly depend on diesel generation, resulting in high operating costs and carbon emissions. This study develops a 24-hour Dynamic economic dispatch model based on Mixed integer linear programming to optimize the operation of a hybrid diesel–photovoltaic–battery energy storage system in Labuhan Aji, Moyo Island, Indonesia. The model minimizes daily operating costs subject to power balance, diesel-unit output and commitment limits, ramp-rate constraints, photovoltaic availability, battery charging and discharging limits, and state-of-charge dynamics. Three configurations were evaluated using actual operational data: diesel-only, diesel–photovoltaic, and diesel–photovoltaic–battery. The daily electrical demand was 1,251.3 kWh. The diesel-only case incurred an operating cost of IDR 4,837,537 and produced 1,067.4 kg CO₂. Adding photovoltaic generation reduced the cost and emissions by 33.8%, while increasing the Renewable Energy Share to 33.9%. The complete hybrid configuration delivered the best performance: diesel generation fell to 632.0 kWh, operating cost decreased to IDR 2,409,172, emissions declined to 539.1 kg CO₂, and the Renewable Energy Share reached 49.5%. Battery storage shifted daytime solar surplus to evening demand and supported peak shaving. The results demonstrate that coordinated dispatch can substantially improve the economic and environmental performance of isolated power systems without compromising hourly supply adequacy.
Co-Authors Arismon Saputra Firmansyah Rizal Irvan Taufik Hidayat Stozn Romeo Syamsir Abduh Umar Farouk Andy Saputro