Dyas Isnaen Ilham, . (2026) SIMULASI KARAKTERISTIK PEMBAKARAN DAN EMISI MESIN DIESEL DUAL-FUEL BERBAHAN BAKAR CAMPURAN HIDROGEN-METANA. Skripsi thesis, Universitas Pembangunan Nasional Veteran Jakarta.
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Abstract
Compression-ignition marine engines remain the primary contributor to the maritime sector's exhaust footprint, prompting continued interest in hydrogen–methane dual-fuel operation as a pathway toward lower-carbon propulsion. This study employs CFD simulation in ANSYS Forte Student to characterize the in-cylinder combustion behavior and pollutant formation of a dual-fuel diesel engine based on the FAW CA6DL2-35 platform. Four injection configurations were examined by combining two start-of-injection timings (−35° and −30° CA bTDC) with two injection durations (10.5° and 12.5° CA), each tested across three fuel substitution levels: pure H₂, an equal H₂–CH₄ blend, and pure CH₄. Across all configurations, hydrogen consistently drove the combustion process toward higher peak pressure, temperature, and heat release rate, but at the cost of elevated Nox output; methane produced the opposite pattern, with the mildest thermal response paired with the highest CO and UHC levels. The 50:50 blend was found to moderate this trade-off more effectively than either single fuel, offering the most balanced emission profile among the three ratios tested. Among the nine injection scenarios, configuration A3 — start of injection at −35° CA bTDC with a 10.5° CA injection duration, paired with the 50:50 blend — yielded the best overall balance, producing a peak pressure of 14.03 MPa, peak temperature of 2,024.33 K, and peak heat release rate of 1,363.10 J/°CA, while keeping CO and UHC emissions at their lowest levels among all blended-fuel scenarios (447.31 ppm and 79.84 ppm, respectively) with a moderate NOx output of 1,503.01 ppm.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Additional Information: | [No panggil: 2210313062] [Pembimbing: Fathin Muhammad Mahdhudhu] [Penguji 1: Fajri Ashfi Rayhan] [Penguji 2: Fakhri Akbar Ayub] |
| Uncontrolled Keywords: | dual-fuel engine, hydrogen, methane, exhaust emissions, combustion characteristics |
| Subjects: | V Naval Science > V Naval Science (General) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering |
| Divisions: | Fakultas Teknik > Program Studi Teknik Perkapalan (S1) |
| Depositing User: | DYAS ISNAEN ILHAM |
| Date Deposited: | 27 Aug 2026 03:02 |
| Last Modified: | 27 Aug 2026 03:02 |
| URI: | http://repository.upnvj.ac.id/id/eprint/52968 |
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