Studi Pengaruh Penambahan Hot Exhaust Gas Recirculation Terhadap Performa Dan Emisi Mesin Diesel Dual Fuel Dexlite Dan Hidrogen

Prakoso, Irfanda Ario (2023) Studi Pengaruh Penambahan Hot Exhaust Gas Recirculation Terhadap Performa Dan Emisi Mesin Diesel Dual Fuel Dexlite Dan Hidrogen. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dengan meningkatnya kebutuhan energi dari sector minyak bumi yang digunakan untuk bahan bakar pembakaran, maka menimbulkan efek negative terhadap lingkungan. Dari hasil pembakaran yang dilakukan menghasilkan emisi yang menyebabkan pencemaran lingkungan. Menggunakan energi baru dan terbarukan merupakan solusi untuk mengurangi pencemaran lingkungan dan tetap memenuhi kebutuhan energi. Salah satu sumber energi baru dan terbarukan yang cenderung ramah lingkungan adalah dengan menggantikan bahan bakar minyak diesel dengan dexlite pada mesin CI. Selain itu, dapat ditambahkan bahan bakar hydrogen sebagai bahan bakar bebas karbon. Tetapi penggunaan bahan bakar tersebut menyebabkan emisi NOx yang berbahaya cenderung meningkat. Salah satu cara untuk mengurangi dan menurunkan emisi NOx adalah menggunakan sistem EGR. Penelitian ini dilakukan untuk mengetahui performa dan emisi mesin diesel dual fuel dengan bahan bakar dexlite dan hydrogen dengan variasi rasio bukaan EGR 0%, 5%, 10%, 15%, 20%, dan 25% pada rentang beban 1000 watt sampai 4000 watt. Dengan rpm konstan 2000 rpm. Penelitian dilakukan dengan eksperimen dan merancang conventer kit dari tabung gas hydrogen menuju mesin skala laboratorium. Electronic control unit digunakan mengatur start of injection dan duration injection gas hydrogen pada injector dengan input trigger sensor rpm. Dalam penelitian ini menggunakan laju alir konstan gas hidrogen yang digunakan adalah 2.5lpm yang diatur dengan cara mengatur pada bukaan tabung hidrogen yang dapat dikontrol dengan flow meter. Tekanan gas dijaga konstan pada 1 bar dan start of injection pada 0 BTDC. Penggunaan dual fuel dexlite dan hidrogen ini dipadukan dengan penggunaan hot exhaust gas recirculation dengan memasukan kembali gas buang hasil pembakaran kedalam ruang bakar melewati intake manifold. Energi yang dihasilkan mesin akan digunakan untuk memutar generator sehingga bisa dilakukan pembebanan lampu untuk mengetahui performa dari penggunaan dual fuel dexlite dan hidrogen dan penggunaan hot exhaust gas recirculation. Hasil yang didapatkan dari penelitian ini menunjukkan bahwa penambahan gas hidrogen dan penggunaan hot exhaust gas recirculation paling optimal terjadi pada laju aliran konstan 2.5lpm dan variasi rasio bukaan EGR 20%. Yaitu terjadi nilai daya, torsi, dan BMEP yang maksimal, rata-rata peningkatan BTE 15.28% dan penurunan rata-rata SFC 14.7%. dengan laju aliran konstan 2.5lpm dan variasi rasio bukaan EGR 20% didapatkan emisi smoke opacity mengalami kenaikan rata-rata 98.7% dan dapat menurunkan emisi NO sebanyak 78% pada pembebanan 3500 watt.
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With the increasing demand for energy from the petroleum sector used for combustion fuel, it has a negative effect on the environment. The combustion results in emissions that cause environmental pollution. Using new and renewable energy is a solution to reduce environmental pollution and still meet energy needs. One of the new and renewable energy sources that tend to be environmentally friendly is by replacing diesel fuel oil with dexlite in CI engines. In addition, hydrogen fuel can be added as a carbon-free fuel. But the use of these fuels causes harmful NOx emissions to tend to increase. One way to reduce and lower NOx emissions is to use an EGR system. This study was conducted to determine the performance and emissions of dual fuel diesel engines with dexlite and hydrogen fuels with variations in EGR opening ratios of 0%, 5%, 10%, 15%, 20%, and 25% in the load range from 1000 watts to 4000 watts. With a constant rpm of 2000 rpm. The research was conducted by experimenting and designing a conventer kit from a hydrogen gas cylinder to a laboratory scale engine. Electronic control unit is used to regulate the start of injection and duration of hydrogen gas injection at the injector with input trigger sensor rpm. In this study using a constant flow rate of hydrogen gas used is 2.5lpm which is set by adjusting the opening of the hydrogen cylinder which can be controlled with a flow meter. Gas pressure is kept constant at 1 bar and start of injection at 0 BTDC. The use of dual fuel dexlite and hydrogen is combined with the use of hot exhaust gas recirculation by re-entering the exhaust gas from combustion into the combustion chamber through the intake manifold. The energy produced by the engine will be used to rotate the generator so that the lights can be loaded to determine the performance of the use of dual fuel dexlite and hydrogen and the use of hot exhaust gas recirculation. The results obtained from this study indicate that the addition of hydrogen gas and the use of hot exhaust gas recirculation is most optimal at a constant flow rate of 2.5lpm and a variation of the EGR opening ratio of 20%. That is, there is a maximum value of power, torque, and BMEP, an average BTE increase of 15.28% and an average SFC decrease of 14.7%. with a constant flow rate of 2.5lpm and a variation in the EGR opening ratio of 20%, smoke opacity emissions have increased by an average of 98.7% and can reduce NO emissions by 78% at 3500 watts loading.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Dexlite, Exhaust Gas Recirculation, Gas Hidrogen, Performa, Emisi Gas Buang, Diesel, Hydrogen Gas, Flow Rate, Performance, Exhaust Emissions
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ254.7 Combustion chambers T Technology > TJ Mechanical engineering and machinery > TJ762.E93 Exhaust systems T Technology > TJ Mechanical engineering and machinery > TJ799 Diesel motor--Electronic control.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	irfanda ario prakoso
Date Deposited:	28 Aug 2023 03:47
Last Modified:	28 Aug 2023 03:47
URI:	http://repository.its.ac.id/id/eprint/103337

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