Analisis Pengaruh Variasi Viskositas LSFO terhadap Kinerja Dan Emisi Mesin Diesel Kapal

Efendi, Mochamad Zeini (2026) Analisis Pengaruh Variasi Viskositas LSFO terhadap Kinerja Dan Emisi Mesin Diesel Kapal. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Implementasi regulasi IMO 2020 (MARPOL Annex VI) yang membatasi kandungan sulfur dalam bahan bakar kapal maksimal 0,5% m/m telah mendorong transisi dari Heavy Fuel Oil (HFO) menuju Low Sulphur Fuel Oil (LSFO). Implementasi regulasi IMO 2020 (MARPOL Annex VI) yang membatasi kandungan sulfur bahan bakar kapal maksimal 0,5% m/m telah mendorong transisi dari Heavy Fuel Oil menuju Low Sulphur Fuel Oil (LSFO). LSFO di Indonesia menunjukkan variasi viskositas yang sangat lebar antar titik pengadaan (, sehingga menimbulkan risiko operasional pada mesin diesel kapal, khususnya mesin bersistem common rail. Penelitian ini bertujuan menganalisis pengaruh variasi viskositas LSFO campuran terhadap kinerja dan emisi mesin diesel kapal pada kondisi operasional aktual, mengevaluasi kualitas penyalaan dan emisi karbon, mengarakterisasi atomisasi, serta merumuskan rekomendasi pengelolaan bahan bakar melalui pengambilan data langsung dari kapal tanker yang masih beroperasi dengan ukuran Large Size (LR) dengan motor penggerak utama (Main Engine) tipe Marine Diesel Two Stroke Slow Speed dengan Common Rail. Parameter yang diinvestigasi meliputi performa pembakaran (specific fuel consumption, tekanan silinder) dan karakteristik emisi (CO₂,) Parameter turunan dihitung melalui daya indikasi, CCAI, nilai kalor, emisi karbon (faktor IMO), dan Sauter Mean Diameter (Elkotb, 1982); analisis statistik memakai uji Levene, Welch ANOVA, Kruskal-Wallis, Tukey HSD, dan ukuran efek η². Hasil penelitian menunjukkan bahwa variasi viskositas tidak berpengaruh signifikan terhadap tekanan silinder (Pmax p = 0,873; Pcom p = 0,693) tetapi berpengaruh signifikan terhadap efisiensi dan parameter termal. Kondisi K2 (viskositas injeksi 13,82 cSt) mencapai kinerja terbaik dengan SFOC indikasi terendah (229,20 g/kWh) dan efisiensi termal indikasi tertinggi (37,27%), temperatur gas buang terendah (F(2,116) = 52,64; p < 0,001; η² = 0,476), serta intensitas karbon terendah.
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The implementation of IMO 2020 (MARPOL Annex VI), which limits the sulfur content of marine fuel to a maximum of 0.5% m/m, has driven the transition from Heavy Fuel Oil to Low Sulphur Fuel Oil (LSFO). Blended LSFO in Indonesia has exhibited a very wide viscosity range across supply points, posing operational risks to marine diesel engines, particularly common-rail engines. This study aimed to analyze the effect of blended-LSFO viscosity variation on the performance and emissions of a marine diesel engine under actual operating conditions, to evaluate ignition quality and carbon emissions, to characterize atomization, and to formulate fuel-management recommendations. The research was conducted as an in-service observational study on a Wärtsilä Sulzer 7RT-flex58T-B engine (two-stroke, low-speed, seven-cylinder, common-rail) aboard a Large Range tanker. Derived parameters were computed via indicated power, CCAI, lower heating value, IMO-factor carbon emissions, and Sauter Mean Diameter (Elkotb, 1982); statistical analysis employed Levene, Welch ANOVA, Kruskal-Wallis, Tukey HSD, and the η² effect size. The results showed that viscosity variation had no significant effect on cylinder pressure (Pmax p = 0.873; Pcom p = 0.693), but had a significant effect on efficiency and thermal parameters. Condition K2 (injection viscosity 13.82 cSt) achieved the best performance, with the lowest indicated SFOC (229.20 g/kWh), the highest indicated thermal efficiency (37.27%), the lowest exhaust gas temperature (F(2,116) = 52.64; p < 0.001; η² = 0.476), and the lowest carbon intensity.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Emisi, Kinerja, Low Sulphur Fuel Oil (LSFO), Mesin Diesel Marine, Viskositas
Subjects:	V Naval Science > V Naval Science (General) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM276.A1 Fuel (Including supplies, costs, etc.) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses
Depositing User:	Mochamad Zeini Efendi
Date Deposited:	05 Aug 2026 01:17
Last Modified:	05 Aug 2026 01:17
URI:	http://repository.its.ac.id/id/eprint/143688

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