Karakterisasi Operasional Mesin Gas LPG Menggunakan Mode Dual-Fuel LPG-Hidrogen

Febrianto, Wigung Tri (2026) Karakterisasi Operasional Mesin Gas LPG Menggunakan Mode Dual-Fuel LPG-Hidrogen. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ketergantungan terhadap energi fosil masih sangat tinggi, dengan 80% pembangkit listrik pada RUPTL PLN 2021–2030 masih mengandalkan sumber energi berbasis fosil seperti batubara dan gas. Kondisi ini diperparah dengan kenaikan konsumsi energi tahunan rata-rata sebesar 4,2%, yang jika tidak diimbangi dengan transisi energi bersih, akan menyebabkan krisis energi dan kerusakan lingkungan jangka panjang. Penggunaan mode dual-fuel LPG-hidrogen menawarkan peluang besar dalam menurunkan emisi mesin tanpa melakukan modifikasi besar pada infrastruktur yang sudah ada. Penelitian dilakukan untuk mengetahui sejauh mana pengaruh mass flow rate Hidrogen terhadap karakterisasi operasional mesin gas LPG yang dioperasikan menggunakan mode dual-fuel. Karakterisasi operasional ditunjukan dengan parameter unjuk kerja, emisi, dan kondisi operasi. Penelitian ini menggunakan metode CFD berbasis Reynold Averaged Navier-Stokes (RANS) RNG k-epsilon. Pemodelan 3D dilakukan dengan kondisi transien untuk memodelkan fenomena 1/8 pada ruang bakar. Fokus utama dalam penelitian ini adalah mendapatkan data kuantitatif berupa daya, torsi, BMEP, efisiensi termal, BSfc, AFR, emisi CO, emisi HC, emisi NOx, dan temperatur ruang bakar. Dari hasil pengujian, didapatkan hasil dengan adanya penambahan persentase Hidrogen pada campuran bahan bakar LPG-Hidrogen berpengaruh terhadap karakterisasi mesin berupa peningkatan daya poros sebesar 12,2%, peningkatan torsi sebesar 17,2%. peningkatan BMEP 8,2%, penurunan SFC sebesar 13,1%, peningkatan efisiensi thermal sebesar 13,5%, penurunan emisi karbon monoksida (CO) sebesar 8,2%, penurunan emisi hydro carbon (HC) sebesar 9,4%, penurunan temperature mesin sebesar 12,2%, dan penurunan temperature pelumas sebesar 8,3%.
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Dependence on fossil fuels remains very high, with 80% of power plants in PLN's 2021–2030 RUPTL still relying on fossil-based energy sources such as coal and gas. This situation is exacerbated by an average annual energy consumption increase of 4.2%, which, if not offset by a clean energy transition, will lead to an energy crisis and long-term environmental damage. The use of LPG-hydrogen dual-fuel mode offers a great opportunity to reduce engine emissions without making major modifications to existing infrastructure. Research was conducted to determine the extent of the influence of hydrogen mass flow rate on the operational characterization of LPG gas engines operated in dual-fuel mode. Operational characterization is demonstrated by performance parameters, emissions, and operating conditions. This study used the Reynold Averaged Navier-Stokes (RANS) RNG k-epsilon-based CFD method. 3D modeling was performed under transient conditions to model the 1/8 phenomenon in the combustion chamber. The main focus of this study was to obtain quantitative data in the form of power, torque, BMEP, thermal efficiency, BSfc, AFR, CO emissions, HC emissions, NOx emissions, and combustion chamber temperature. Translated with DeepL.com (free version)From the test results, it was found that the addition of Hydrogen to the LPG-Hydrogen fuel mixture affected the engine characteristics in the form of an increase in shaft power of 12.2%, an increase in torque of 17.2%. an increase in BMEP of 8.2%, a decrease in SFC of 13.1%, an increase in thermal efficiency of 13.5%, a decrease in carbon monoxide (CO) emissions of 8.2%, a decrease in hydro carbon (HC) emissions of 9.4%, a decrease in engine temperature of 12.2%, and a decrease in lubricant temperature of 8.3%.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Bahan bakar fosil, Mesin Gas LPG, Dual-fuel LPG-Hidrogen, MAss Flow Rate, Unjuk Kerja, Emisi, Kondisi Operasi Fossil Fuel, LPG Gas Engine, Dual-fuel LPG-Hidrogen, Mass Flow Rate, Performance, Emission, Operational Condition
Subjects:	Q Science > QD Chemistry > QD79.T38 Thermal analysis
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Wigung Tri Febrianto
Date Deposited:	03 Feb 2026 02:50
Last Modified:	03 Feb 2026 02:50
URI:	http://repository.its.ac.id/id/eprint/131934

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