Hardianto, Mochamad Choirul (2019) Pemodelan CFD untuk Mengetahui Pengaruh Combustion Flow pada Mesin Diesel Modifikasi Dual Fuel. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Natural gas merupakan bahan bakar alternatif pengganti bensin dan solar yang diharapkan menghasilkan emisi yang rendah serta ramah lingkungan. Jenis natural gas yang dimanfaatkan sebagai bahan bakar yaitu compressed natural gas (CNG) atau di Indonesia biasa disebut dengan bahan bakar gas (BBG). Komposisi utama CNG adalah metana (CH4). CNG dibuat dengan melakukan kompresi metana (CH4) yang diekstrak dari natural gas bertekanan 100 bar hingga 275 bar yang disimpan dan didistribusikan dalam pressure vessel atau bejana tekan yang biasanya berbentuk silinder. Diperlukan perhatian khusus pada sistem pembakaran mesin diesel jika menggunakan CNG sebagai bahan bakar alternatif. Hal ini dilakukan karena adanya perbedaan karakteristik antara CNG dengan bahan bakar konvensional, contohnya solar. Untuk mengoptimalkan pembakaran pada mesin diesel dual fuel, maka komposisi bahan bakar yang dicampurkan juga perlu diperhatikan. Mesin yang digunakan untuk analisa ini adalah mesin diesel modifikasi dual fuel berbahan bakar CNG dan diesel oil. Hasil dari pemodelan ini menunjukkan pressure, temperature, dan velocity/flow di ruang bakar dengan nilai tertinggi dimiliki pada variasi bahan bakar 0% CNG dan 100% diesel oil. Untuk nilai pressure tertinggi yaitu 84,76 bar, nilai temperature tertinggi yaitu 2174,77 K, nilai velocity of fluids tertinggi yaitu 26,8651 m/s.
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Natural gas is an alternative fuel of gasoline and diesel fuel which are expected to produce low emissions and environmentally friendly. The type of natural gas that is used as a fuel is compressed natural gas (CNG). The main composition of CNG is methane (CH4). CNG is made by doing methane compression (CH4) which is extracted from natural gas pressurized 100 bar up to 275 bar which is stored and distributed in a pressure vessel which is usually cylindrical. Special attention is needed to diesel engine combustion systems if using CNG as an alternative fuel. This is done because of the characteristic differences between CNG and conventional fuels, for example diesel fuel. To optimize combustion on a dual fuel diesel engine, the composition of the fuel mixed also needs to be considered. The engine used for this analysis is a modified dual fuel diesel engine fueled by CNG and diesel oil. The results of this modeling shows pressure, temperature, and velocity of flow in combustion chamber with the highest value in variations of fuel 0% CNG and 100% diesel oil. For the highest pressure value is 84.76 bar, the highest temperature value is 2174.77 K, the highest velocity of fluids value is 26.8651 m/s.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSSP 621.436 1 Har p-1 2019 |
| Uncontrolled Keywords: | CFD, CNG, Diesel, Dual Fuel. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ799 Diesel motor--Electronic control. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Mochamad Choirul Hardianto |
| Date Deposited: | 19 Jun 2024 07:30 |
| Last Modified: | 19 Jun 2024 07:30 |
| URI: | http://repository.its.ac.id/id/eprint/69227 |
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