Engine Combustion Performance Of Dual-Fuel Diesel Engine With B100 As Pilot Injection And Ammonia As Main Fuel For Zero Emissions

Abidin, Muayyad Zainal (2026) Engine Combustion Performance Of Dual-Fuel Diesel Engine With B100 As Pilot Injection And Ammonia As Main Fuel For Zero Emissions. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

This study evaluates performance, combustion characteristics, and emissions of an NH₃–B100 dual-fuel (DF) compression-ignition engine on a single-cylinder Yanmar TF-85, using B100 as the pilot-injection fuel and ammonia (NH₃) as the main fuel. Simulations were performed in ANSYS Forte and post-processed in MATLAB over 1400–2200 rpm and 20–100% load, extracting IMEP/FMEP/BMEP, brake power, torque, and SFOC. The B100 baseline shows a mid-speed efficiency optimum, with minimum SFOC at 2000 rpm and full load (255.35 g/kWh), while the highest-speed condition, 2200 rpm, delivers maximum brake power (6.78 kW) and torque (29.46 N·m) with SFOC 274.43 g/kWh. Under the present DF(NH₃–B100) settings, performance penalties are observed at 2000 rpm–full load, brake power decreases from 5.41 kW (B100) to 4.36 kW (DF) and SFOC increases from 255 to 512 g/kWh, at 2200 rpm–full load, brake power decreases from 6.78 to 4.53 kW while SFOC rises from 274 to 637 g/kWh. Combustion phasing analysis indicates an advanced CA50 in the mid-speed region (≈9° aTDC at 2000 rpm), with an increased peak HRR, suggesting faster heat release. For DF operation with 30% B100 pilot and 70% NH₃ energy substitution at high load, CO₂ is substantially reduced around 60%–70%, with trade-offs in slightly higher NOx and load-dependent NH₃ slip. Overall, NH₃ substitution provides strong carbon-reduction potential, but further optimization of injection strategy and operating parameters is required to mitigate performance losses and control NOx and NH₃ slip.
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Penelitian ini mengevaluasi performa, pembakaran, dan emisi mesin dual-fuel NH₃–B100 pada Yanmar TF-85 satu silinder, dengan B100 sebagai injeksi pilot dan NH₃ sebagai bahan bakar utama. Simulasi dilakukan di ANSYS Forte dan dipasca-proses di MATLAB pada 1400–2200 rpm dan beban 20–100%, dengan keluaran IMEP/FMEP/BMEP, daya rem, torsi, dan SFOC. Pada kondisi dasar B100, SFOC minimum terjadi pada 2000 rpm beban penuh (255,35 g/kWh), sedangkan daya dan torsi maksimum dicapai pada 2200 rpm (6,78 kW; 29,46 N·m) dengan SFOC 274,43 g/kWh. Pada pengaturan DF saat ini, performa menurun: pada 2000 rpm beban penuh daya turun 5,41→4,36 kW dan SFOC naik 255→512 g/kWh; pada 2200 rpm beban penuh daya turun 6,78→4,53 kW dan SFOC naik 274→637 g/kWh. Analisis fasa pembakaran menunjukkan CA50 lebih maju pada putaran menengah (≈9° aTDC) dan puncak HRR meningkat, menandakan pelepasan panas lebih cepat. Dengan 30% pilot B100 dan substitusi energi NH₃ 70% pada beban tinggi, emisi CO₂ turun sekitar 60–70%, namun NOx sedikit meningkat dan NH₃ slip bergantung pada beban. Secara umum, substitusi NH₃ berpotensi besar menurunkan karbon, tetapi optimasi strategi injeksi dan parameter operasi masih diperlukan untuk mengurangi penalti performa serta mengendalikan NOx dan NH₃ slip.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Dual-fuel, Ammonia, B100, ANSYS Forte, NOₓ, CO2, Yanmar TF-85
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM276.A1 Fuel (Including supplies, costs, etc.)
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses
Depositing User:	Muayyad Z.a.
Date Deposited:	05 Feb 2026 03:18
Last Modified:	05 Feb 2026 03:18
URI:	http://repository.its.ac.id/id/eprint/132163

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