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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Info-Teknik Jurnal Rekayasa Energi dan Mekanika Jurnal Teknologi Jurnal Ilmiah Fakultas Sains dan Teknik Universitas Nusa Cendana
Bambang Hertomo
Jurusan Teknik Mesin Politeknik Negeri Malang
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISIS EMISI GAS BUANG PADA MESIN KONVENSIONAL SILINDER TUNGGAL Bambang Hertomo
INFO-TEKNIK Vol 18, No 1 (2017): INFOTEKNIK Vol. 18 No. 1 2017
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v18i1.3885

Abstract

The transportation sector consisting of cars and motorcycles annually increases, so the resulting exhaust gas keeps increasing. Exhaust gases that pollute the environment consist of CO and unburner HC, this is harmful to the environment. Objective to know the optimum value of CO and HC emissions when using fuel with octane value 88 and 90 with main jet size 72 and 105. What is the optimum change of CO and HC emissions at 4000rpm up to 9000rpm with octane fuel 88 and 90 Constant speed method with engine speed ranging from 4000rpm up to 9000rpm used for exhaust emissions. Results for main jet 72 octane 88 value 3.19% CO, 264,62ppm and optan 90 value 3.09% CO 242,29ppm. For main jet 105 octane 88 value 3.36% CO, 278,62ppm and octane 90 value 252,62ppm HC.
PENGGUNAAN HYDRO-CRACK SYSTEM SEBAGAI UPAYA MENINGKATKAN KINERJA MESIN Winoko Agus Yuniarto; Hertomo Bambang; Nurhadi Nurhadi
ROTOR Vol 11 No 2 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.544 KB) | DOI: 10.19184/rotor.v11i2.9323

Abstract

The use of hydro-crack systems in combustion motors in addition to functioning to improve exhaust emissions and improve engine performance through the combustion process. Perfect combustion can be adjusted during the combustion process. The purpose of the study was to determine the select magnitude of power increase, decrease fuel consumption and increase the average effective pressure and rotation of the use of 92 octane fuel without HCS. The method of testing engine performance in obtaining data is constant speed (v boarding) based on ISO 1585. Subsequent data signifies presented in a graphical form which is then calculated by statistics. Power increased 2.83hP and bmep 43.19kPa at 4000rpm, sfc dropped 0.0358kg / hP. Hours at 1000rpm and rose by 43.19kPa, when using 92 octane fuel against the standard. When using octane 95 with HCS the power rises 7.95hP at 4000rpm, buys 28.42 kPa when 4500 and sfc drop 0.0537kg / hp. Hours at 1000rpm Keywords: power, fuel consumption, effective average pressure, octane value, hydro-crack system
Penggunaan Bioetanol Sebagai Alternatif Campuran Bahan Bakar Pada Mesin Otto Agus Hariono; Bambang Hertomo; Kasijanto Kasijanto
Jurnal Rekayasa Energi dan Mekanika Vol 1, No 2 (2021): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v1i2.54

Abstract

Abstrak Ketersediaan bahan bakar fosil untuk penggerak kendaaran bermotor semakin menipis, akibat bertambah kendaraan yang beroperasi di jalan raya, sehingga perlu pemikiran energy terbarukan lai sebagai alternatif penggantinya,  Alternatif tumbuhan yaitu singkong sebagai sumber energi sebagai penggantinya perlu pemikiran lanjut. Bioethanol dari singkong ini dilakukan dengan proses fermentasu selama 5 hari dengan dicampu ragi, Tujuan menentukan daya dan torsi terbesar serta sfc terkecil saat menggunakan campuran bioetanol E10, E15 dan E20 dengan pertalite. Metode pengujian daya dan torsi sesuai standar ISO 1585 untuk mendapatkann data, selanjutnya diolah menggunakan statistik. Variabel tetapnya bioetanol (E10, E15 dan E20). Variabel berubahnya daya, torsi, konsumsi bahan bakar spesifik (sfc) dan putaran mesin. Hasil daya terbesar saat menggunakan E10 sebesar 6,67hP dan torsinya 6,58hP sedang untuk E15 dayanya sebesar 6,10hP torsinya 6,22Nm serta untuk E-20 dayanya 6,18hP torisnya 6,36Nm. Sfc terkecil untuk E10 sebesar 0,0120kg/hP,jam dan untuk E15 sebesar 0,0232kg/hP.jam serta untuk E20 sebesar 0,202kg/hp.jam. Kata kunci: bioetanol, daya, konsumsi bahan bakar Abstract The availability of traditional fuels for driving motorized vehicles is running low, due to the increasing number of vehicles operating on the highway, so it is necessary to think about other renewable energy as an alternative replacement. Namely cassava plants as an alternative energy sources as a replacement needs to be thought further. This bioethanol from cassava is obtained through a fermentation process for 5 days mixed with yeast. The aim is to determine the biggest power and torque as well as the smallest SFC when pertalite is mixed with bioethanol E10, E15 and E20. The power and torque testing method is according to ISO 1585 standard to obtain data, then it is processed statistically. The fixed variable is bioethanol (E10, E15 and E20). Free variable is changes in power, torque, specific fuel consumption (SFC) and engine speed. The biggest power is 6.67hP reached when using the E10 while the torque is 6.58hP, when using the E15 the power is 6.10hP and the torque is 6.22Nm then for the E-20 the power is 6.18hP the torque is 6.36Nm. The smallest SFC is 0.0120kg / Hp.hour for E10 and 0.0232kg / hP.hours for E15 then 0.202kg / hp.h for E20. Keywords : bioethanol,  power,  fuel consumption
DESAIN DAN ANALISIS KNALPOT BERBASIS SPONGESTEEL TERHADAP GAS BUANG CO, HC, DAYA, DAN SFC PADA MESIN SEPEDA MOTOR Yuniarto Agus Winoko; Hari Rarindo; Bambang Hertomo
Jurnal Teknologi Vol 13 No 1 (2019): MEI 2019
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.215 KB)

Abstract

The increase in the number of motorized vehicles increases every year so that air pollution also increases. Lack of public awareness about reforestation makes the air difficult to circulate. The number of motorized vehicles is also a major factor in increasing air pollution. Exhaust emissions from motorized vehicles are harmful pollutants to the human body. Exhaust gas from motor vehicles contains toxic compounds, one of which is carbon monoxide (CO) and hydro carbon (HC) which are very dangerous for the environment and humans. The purpose of the study is to make a tool that can control exhaust emissions. Sponge steel-based muffler uses sponge steel as a means of continued combustion of the exhaust gas, sponge steel heating is produced from the heat of the exhaust gas itself. The heat from the sponge steel coupled with the pressure from the exhaust gas itself will increase the heat from the sponge steel, so the sponge steel can burn. With the heat from the sponge steel the gas that has not been burned in the combustion chamber will be burned again in the exhaust by a sponge steel, so that CO and HC gas will be burned with O2, CO2, O2 and H2O gases will be obtained. The method of the study is experimental methods. An experimental research study conducted by manipulation that aims to determine the results of manipulation of individual behavior observed. The data observed in this study included a exhaust gas emissions, power, and specific fuel consumtion (SFC). The result of the study, Sponge steel based exhaust can reduce exhaust emissions, in HC compounds can decrease by 24.79% and CO decreases to 29.70%, reduced power by 5.64% is not too significant from standard exhaust, and SFC decreased by 3,12%.
Co-Authors Agus Hariono Hari Rarindo Kasijanto Kasijanto Khambali Khambali Nurhadi - Vinan Viyus Yuniarto Agus Winoko