Studi Eksperimental Unjuk Kerja LPG engine Generator Set Berbahan Bakar CNG Dengan Variasi Sudut Pengapian Dan AFR

Niam, Syahrul (2016) Studi Eksperimental Unjuk Kerja LPG engine Generator Set Berbahan Bakar CNG Dengan Variasi Sudut Pengapian Dan AFR. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kebutuhan energi listrik hampir menjadi kebutuhan primer bagi masyarakat modern di Indonesia. Hal ini dikarenakan energi listrik termasuk salah satu jenis energi yang mampu dirubah menjadi energi lain dan banyak membantu kegiatan sehari-hari. Salah satu alat penghasil listrik adalah LPG ENGINE GENERATOR SET. Alat ini merupakan salah satu jenis GENSET yang digerakkan oleh Spark Ignition engine serta didesign mampu beroperasi dengan dua jenis Bahan Bakar Gas (BBG) yaitu LPG dan CNG. Diantara beberapa karakterisasi pembakaran, salah satu properties yang mempengaruhi proses pembakaran adalah flame speed dan AFR, Nilai stochiometric ratio CNG dan LPG yang berbeda serta karakter flame speed LPG dan CNG yang lebih rendah dari pada bensin menjadikan perlunya pengaturan sudut pengapian serta campuran bahan bakar dan udara yang sesuai agar proses pembakaran yang terjadi menjadi optimal. Penelitian ini dilakukan secara eksperimental pada mesin LPG GENSET Green Power CC5000-LPG yang telah dilakukan perubahan sistem pengapiannya dari sistem pengapian magneto menjadi sistem pengapian ECU-Programable agar mampu divariasikan sudut pengapiannya, serta ditambahkan komponen tambahan seperti DC blower yang diletakkan pada saluran inlet udara dan diberikan komponen pressure regulator pada saluran inlet bahan bakar agar bisa mengvariasikan AFR. Selain itu juga peneliti membandingkan pengaruh perubahan unjuk kerja mesin berbahan bakar LPG dengan CNG. Variasi sudut pengapian yang dilakukan antara lain 20o, 23o dan 26o BTDC. Selanjutnya variasi tekanan masuk bahan bakar yang diberikan diantaranya 40 mbar, 80 mbar, 120 mbar , dan 160 mbar. Kemudian variasi blower dilakukan dengan merubah voltage regulator yaitu 12 V dan 24 V. Hasil keseluruhan pengujian unjuk kerja LPG engine Generator set berbahan bakar CNG terbaik yaitu pada variasi sudut pengapian 26oBTDC, 24 V DC Blower dan variasi tekanan 120 mbar dengan peningkatan Ne : 48,31%, MEP : 46,91%, Torsi 46,911%, efisiensi thermal : 95,35%, efisiensi volumetric : 102,77% serta penurunan SFC : 46,909% dibandingkan menggunakan bahan bakar LPG Standard. selanjutnya kondisi operasi pengujian terbaik diatas memiliki kandungan emisi rata – rata senilai CO : 0,057 %vol. ; CO2 : 3,578 %vol ; dan HC : 85,5 Ppm dan masih dibawah ambang batas emisi. ================================================================================================================== Electrical energy requerement almost become a primary consumtion for modern society in Indonesia. that because the electrical energy is the one type of energy which can to be converted into other energy and helped many daily activities. One means of generating electricity is LPG GENERATOR SET. this is the one type of Genenerator that driven by Spark Ignition engines system and designed capable of operating with two types of Fuel Gas, namely LPG and CNG. Among the characterization of combustion, one of the properties that make some affect to the combustion process is flame speed and AFR, stochiometric ratio of CNG and LPG are different as well as the character of flame speed LPG and CNG are lower than on gasoline makes the necessity to mapping for ignition timing to make support as well as the mixture of fuel and air appropriate the combustion process to make optimal performance engine. This research was carried out experimentally on the LPG ENGINE GENERATOR Green Power CC5000-LPG who was changed from magneto ignition system into ECU-Programmable ignition system, so that the ignition timing can be variated by ECU, as well as add some components to support the combustion such as a DC blower who is placed on the inlet channel air and given pressure regulator on the fuel inlet line in. It also compared the effects of performance LPG-engine who fueled with CNG. the variation of ignition timing are 20o, 23o and 26o BTDC. Furthermore, the fuel inlet pressure will be variated on 40 mbar to 80 mbar, 120 mbar and 160 mbar. Then the blower variation is done by changing the voltage regulator about 12 V and 24 V. The overall best data of performance testing LPG engine generator with CNG fueled are 26oBTDC ignition timing , 24 V DC Blower and 120 mbar variation pressure, the rising performance are Ne: 48.31%, MEP: 46.91%, 46.911% torque, Thermal efficiency: 95.35%, volumetric efficiency: 102.77% and a decrease in SFC: 46.909% compared to using LPG fuel standard. the emision result for that operating conditions are CO: 0.057% vol. ; CO2: 3.578% vol; and HC: 85.5 ppm and that still below of the standard emission limits on Indonesian country.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 621.313 Nia s
Uncontrolled Keywords: LPG GENERATOR SET, ECU-Programable, BTDC, Stochiometric Ratio, Flame Speed, AFR, Sistem Pengapian Magneto, Ne, Torsi, MEP, SFC, Efisiensi Termal, Efisiensi Volumetric.
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Users 13 not found.
Date Deposited: 03 Jul 2017 07:34
Last Modified: 27 Dec 2018 03:18
URI: http://repository.its.ac.id/id/eprint/41850

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