Arif, Ahmad (2015) Karakterisasi Performa Mesin Diesel Sistem Dual Fuel Solar-Cng Tipe Lpig Dengan Pengaturan Start Of Injection Dan Durasi Injeksi Cng. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Manfaat potensial menggunakan compressed natural gas (CNG) pada
mesin diesel dengan sistem dual fuel adalah lebih ekonomis dan ramah lingkungan.
Namun masih terdapat permasalahan pada aplikasi sistem dual fuel saat ini, yaitu
performa yang cenderung menurun pada saat beban rendah dan akselerasi
(penambahan kecepatan pada mesin otomotif atau penambahan beban pada mesin
stasioner). Penelitian ini bertujuan untuk meningkatkan performa mesin diesel
sistem dual fuel tipe low pressure injected gas (LPIG) berbahan bakar solar dan
CNG yang dilakukan pada mesin diesel single cylinder yang telah dimodifikasi
menjadi sistem dual fuel.
Penelitian ini dilakukan secara eksperimental dengan menginjeksikan CNG
melalui injektor ke intake manifold yang dikontrol menggunakan ECU
Programmable. Metode yang digunakan untuk mengetahui nilai pengaturan yang
optimum adalah dengan melakukan mapping start of injection dan durasi injeksi
CNG melalui software VEMSTUNE pada komputer. Start of injection yang
digunakan dalam penelitian ini adalah 35°, 40° dan 45° after top dead center
(ATDC) dan durasi injeksi sebesar 25, 23 dan 21 milisecond (ms). Pengujian
dilakukan dengan putaran mesin konstan pada 1500 rpm dan pembebanan
bervariasi dari 500 Watt sampai 4000 Watt dengan interval 500 Watt.
Hasil yang didapatkan dari penelitian menunjukkan bahwa pengaturan
paling optimal terjadi pada start of injection 45° ATDC dengan durasi injeksi 25
ms, yaitu terjadi peningkatan SFC dual fuel rata-rata yang paling kecil sebesar
31,51%. Hal tersebut menurunkan SFC solar rata-rata sebesar 55,64% atau terjadi
substitusi solar oleh CNG sebesar 47,15%.
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Potential benefits of using compressed natural gas (CNG) in diesel engine
with dual fuel system is more economical and environmentally friendly. But there
are still problems in the application of dual fuel systems today, namely performance
tends to decrease during the low load and acceleration (additional speed on
automotive engines or addition of load on the engine stationary). This study aimed
to improve diesel engine performance dual fuel system type of low pressure injected
gas (LPIG) diesel and CNG are performed on single cylinder diesel engine that has
been modified into a dual fuel system.
This study was carried out experimentally by injecting CNG through the
injector into the intake manifold is controlled using a programmable ECU. The
method used to determine the optimum setting values is to do a mapping start of
injection and injection duration CNG through VEMSTUNE software on the
computer. Start of injection were used in this study was 35 °, 40 ° and 45 ° after top
dead center (ATDC) and injection duration by 25, 23 and 21 milliseconds (ms).
Testing is done with a constant engine speed at 1500 rpm and load varies from 500
Watt to 4000 Watt at intervals of 500 Watt.
The results obtained from the study showed that the most optimal setting
occurs at the start of injection 45 ° ATDC with duration of injection 25 ms, which
is an increase SFC average dual fuel smallest at 31.51%. This reduces the solar SFC
average of 55.64% or substitution of solar fuel by CNG amounted to 47.15%.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 629.253 Ari k |
| Uncontrolled Keywords: | Mesin Diesel Dual Fuel Solar-CNG, Tipe LPIG, Start of Injection, Durasi Injeksi, dan Performa |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ799 Diesel motor--Electronic control. |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Yeni Anita Gonti |
| Date Deposited: | 13 Feb 2020 03:49 |
| Last Modified: | 13 Feb 2020 03:49 |
| URI: | http://repository.its.ac.id/id/eprint/74872 |
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