Evaluasi Major Overhaul terhadap Efisiensi dan SFC PLTD Kotaraya
DOI:
https://doi.org/10.58466/ybb4c426Keywords:
diesel engine; major overhaul; PLTD Kotaraya; SFC; thermal efficiencyAbstract
Diesel power plants remain important for isolated electricity systems because they can be operated flexibly and maintained locally. This paper evaluates the effect of major overhaul on thermal efficiency and Specific Fuel Consumption (SFC) of a 1 MW Cummins KTA50 G8 diesel engine at PLTD Kotaraya. The study used operational logsheet data, commissioning test data, before-overhaul data, and after-overhaul data. SFC was calculated from fuel mass flow and engine power, while thermal efficiency was calculated from engine power, fuel mass flow, lower heating value, and combustion efficiency. The analyzed load levels were 50%, 75%, 85%, and 100% for before and after major overhaul. The results show that SFC after overhaul was lower than before overhaul at all comparable load levels: at 50% load from 267.143 to 238.000 gr/kWh, at 75% load from 245.192 to 238.000 gr/kWh, at 85% load from 255.000 to 230.000 gr/kWh, and at 100% load from 242.857 to 229.500 gr/kWh. Thermal efficiency also increased from 33.489% to 37.590%, 36.488% to 37.590%, 35.084% to 38.898%, and 36.838% to 38.982%, respectively. The findings indicate that major overhaul improved fuel economy and thermal performance, especially when the unit operated at higher load
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References
[1] Ilhamton A, Pakiding M, Tumaliang H, Elektro T, Sam U, Manado R, et al. Analisis unjuk kerja sistem produksi listrik pada pembangkit listrik tenaga diesel Wehana. 2019;8(3).
[2] Hayatullah W, Pratama SP, Yakut FM, Muzaini MR, Umam MF. Analisa performa generator set diesel PLTD terhadap perubahan beban di Pusat Pengembangan Sumber Daya Manusia Migas dan Gas Bumi. Majalah Ilmiah Swara Patra. 2021;11(1):15-27.
[3] Syahri H, Darmulia M, Efendi D, Insal R. Analisis kinerja mesin diesel terhadap pemakaian bahan bakar heavy fuel oil pada pembangkit listrik tenaga diesel. Jurnal Teknologi. 2017;1(2):179-1795.
[4] Masrianto, Rahman ES, Ruslan. Studi tentang proses pembangkitan listrik tenaga diesel PT PLN (Persero) Wilayah Sulselrabar Sektor Tello Makassar. Jurnal Teknik Elektro. 2018;2(1):6.
[5] PLN Pusdiklat. Dasar Operasi dan Pemeliharaan PLTD. Jakarta: PT PLN (Persero).
[6] Cummins Inc. Operation and maintenance manual for KTA50 series diesel engines. Technical manual.
[7] Ariani F, Ginting E, Burhanuddin. Karakteristik kinerja mesin diesel stasioner dengan bahan bakar campuran biodiesel dari biji kemiri sunan. Jurnal Teknologi. 2017;12(1):36-45.
[8] Situs B, Suprihatin, Lestina S, Darmanto P, Shanturi JAR, Siagian Y. Pengaruh bahan bakar biodiesel terhadap kinerja mesin diesel empat langkah. 2022.
[9] Direktorat Jenderal Energi Baru Terbarukan dan Konservasi Energi. Pedoman penanganan dan penyimpanan biodiesel dan campuran biodiesel B30. Jakarta: Kementerian ESDM; 2020.
[10] Heywood JB. Internal Combustion Engine Fundamentals. New York: McGraw-Hill; 1988.
[11] Stone R. Introduction to Internal Combustion Engines. London: Palgrave Macmillan; 2012.
[12] Pulkrabek WW. Engineering Fundamentals of the Internal Combustion Engine. Upper Saddle River: Prentice Hall; 2004.
[13] Cengel YA, Boles MA. Thermodynamics: An Engineering Approach. New York: McGraw-Hill; 2015.
[14] Alfalah W, Sulistyo B, Ikhsan R. Pengaruh pemeliharaan overhaul turbocharger terhadap performa mesin diesel pembangkit. Jurnal Teknik. 2017;5(Power Plant).
[15] Ismail AR. Predictive maintenance dengan sistem major overhaul pada mesin diesel Mirrless Blackstone ELS 16 MK 2 di PLTD Poasia. ENTHALPY-Jurnal Ilmiah Mahasiswa Teknik Mesin. 2016;2(2):42-49.
[16] Mobley RK. Maintenance Fundamentals. Oxford: Butterworth-Heinemann; 2004.
[17] Putra TS, Prabowo E, Ramadani F. Pengaruh Overhaul Terhadap Kinerja High Pressure Heater Unit 3 PLTU Banten Lontar. JTM: JURNAL TEKNIK MESIN. 2026 Feb 1;2(1):10-5.
