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All Journal International Journal of Renewable Energy Development Jurnal Teknik ITS IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Turbo : Jurnal Program Studi Teknik Mesin JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Jurnal Teknologi Terapan Jurnal Teknik Mesin Indonesia JMES The International Journal of Mechanical Engineering and Sciences Automotive Experiences Journal of Railway Transportation and Technology Sewagati International Journal of Renewable Energy Development

Bambang Sudarmanta

Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember

Author-ID : 2567582

Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Numerical Investigation of Over Fire Air (OFA) Effect on Flow Characteristics, NOx Combustion and Emission in a 600 Mw Tangentially Fired Pulverized Coal Boiler Eka Setiawan Seputro; Bambang Sudarmanta
IPTEK The Journal of Engineering Vol 5, No 2 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v5i2.a5017

One of the coal-fired air emissions in boilers is NOx, which has a significant impact on the environment and could cause acid rain, ozone formation, visual impairment and health problems in humans. There are several technologies to reduce and control the formation of NOx emissions, which one of these technologies is the use of over-fire air (OFA). In this research will observe the effect of overfire air (OFA) usage and analyze by numerical 3D modeling method using computational fluid dynamics (CFD) in Paiton 9 power plant boiler and analyzed for 5 (five) OFA damper opening variations, i.e 0%, 25%, 50 %, 75% and 100%. This research will analyze several factors that have significant influence on NOx emission formation, that are: the temperature distribution of the boiler during the combustion process, the distribution of nitrogen oxide (NO) and carbon dioxide (CO2), direction of flue gas flow and trajectory of coal particles and residence time indicating the length of time of burning. The results showed that the lower the flame temperature, the smaller the formation of NOx; the smaller the oxygen content in the combustion process, the smaller the formation of NOx; the shorter the residence time of combustion products in the high temperature zone the smaller the formation of NOx, and the smaller the nitrogen content in coal, the smaller the formation of NOx.

Influence of the Compression Ratio and Duration Injection on Performance and Emission of Sinjai Engine Type Flexible Fuel Engine 150 cc Fueled Bioethanol E70 Hanapi Hasan; Bambang Sudarmanta; Marthen Paloboran
IPTEK The Journal of Engineering Vol 3, No 3 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v3i3.a3167

In this study, the effects of using gasoline (E0) and gasoline-ethanol blends E70 on engine performance and exhaust emissions have been experimentally investigated. The investigation was conducted on a single-cylinder, four-stroke, spark ignition engine. The experiments were performed by varying the compression ratio and duration injection (100%, 125%, 150%, 175% and 200%) at a speed of 2000 up to 8000 rpm at full open throttle. The experimental results showed that blending gasoline with ethanol slightly increased the torque and decreased carbon monoxide (CO) and hydrocarbon (HC) emissions. It was also found that blending with ethanol allows increasing the compression ratio without knock occurrence

Influence Of The Compression Ratio And Ignition Timing On CB150R Engine Performance With 85% Bioethanol gasoline Blended Fuel Yuli Mafendro Dedet Eka Saputra; Bambang Sudarmanta; Marthen Paloboran
IPTEK The Journal of Engineering Vol 3, No 3 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v3i3.a3207

Subtitution of the fuel type in the gasoline engine will change the setting The engine parameters as well as modify it to minimize engine performance degradation And increased exhaust emissions. Utilization of ethanol (85% vol.) - gasoline (15% vol.) The combination (E-85) for the gasoline engine requires some machine modifications and setting parameters due to differences in properties and characters between ethanol and gasoline. This study aims to test the effect of ignition timing and compression ratio on the performance of the engine and emission gas emissions. Ignition time varies between 16-24 Before Top Dead Center (BTDC) d. While the compression ratio variation consists of 11 (standart); 12, 12.5 and 13: 1. It was found that advancing the ignition time range 16o-24o BDTC with 13: 1 compression ratio can increase the performance of torque, bmep, and thermal efficiency respectively 7.94%, 5, 82% and 1.6% respectively, and a decrease of emissions of co and hc respectively 56.6% and 0.6% when compared with the performance of standard gasoline-fueled engines (E0).

Effects of Pilot Injection Timing on The Engine Performance of A Diesel Dual Fuel Engine Jose da Silva; Dori Yuvenda; Bambang Sudarmanta
IPTEK The Journal of Engineering Vol 5, No 2 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v5i2.a5014

The combustion process in dual fuel diesel engines occurs sequentially starting with premix burning. The premix burning starts with the ignition delay process. The presence of CNG causes the ignition delay process to become longer, thereby reducing engine performance and increasing emissions on dual fuel diesel engines. This study uses diesel engine type Diamond DI 800 with dual fuel indirect injection model system. The method used a variation of diesel pilot injection timing 110 CA, 130 CA, 150 CA, 170 and 190 CA BTDC. Testing is done with a constant engine speed of 1500 rpm and loading 500 to 3000 watts with 500-watt intervals. The results show that by advancing the diesel pilot injection timing where brake horsepower and the average effective pressure between single fuel and dual fuel is not too far as the current and voltage changes generated by the generator are not too small. While optimal thermal efficiency increased by 4.11%, while CO and HC emissions decreased respectively by 10.85% and 8.28% at occurred at the pilot injection timing 170 CA BTDC but still under the single fuel engine.

The Effect of Addition Electrical Supercharger on Diesel Dual Fuel Engine with Variation of Air Mass Flow Rate to The Engine Performance and Emissions Jamaludin Jamaludin; Dori Yuvenda; Bambang Sudarmanta
IPTEK Journal of Proceedings Series No 1 (2019): 4th International Seminar on Science and Technology 2018 (ISST 2018)
Publisher : Institut Teknologi Sepuluh Nopember

Diesel Dual fuel system is a diesel operated by using dual fuel CNG and diesel fuel as a pilot fuel. The problem that often occurs in dual fuel system is the reduced ratio of air and fuel. This causes the thermal efficiency to be lower. So in this study mounted electric supercharger as an air supply for performance and efficiency, and emissions from diesel engines better. This research uses diesel engine type Diamond Di 800 with dual fuel indirect injection model system. The method used is to vary the air mass flow rate (ṁ) through intake manifold to the combustion chamber 0.0063 kg/s, 0.0072 kg/s, 0.0077 kg/s, 0.0087 kg/s, and 0.0095 kg/s by adjusting the voltage on electric supercharger 8V, 9V, 10V, 11V, and 12V. Measurements are made to: the current and the voltage of each load, the consumption time of 25 ml diesel fuel, and the exhaust emissions (CO, HC, and PM). The best result was found that the addition of air mass flow rate (ṁ) to dual fuel system had no significant effect on the engine's effective power, torque, Bmep when compared with single fuel. The addition of air mass flow rate (ṁ) 0.0087 kg/s can substitution the diesel fuel by 56.45%, thermal efficiency increased by 33.57% but under single fuel condition, and increase the average AFR by 64.31%. The average CO and HC emissions decreased by 15.18% and 62.35% even though they were under single fuel condition, while the PM emissions increase with increasing loads but compared to single fuel decreased by 75%

Numerical Study Effect of Secondary Air Mass Flow to Characteristics of Circulating Fluidized Bed Boiler Ahmad Tarmizi; Giri Nugroho; Achmad Syaifudi; Bambang Sudarmanta
IPTEK Journal of Proceedings Series No 1 (2018): 3rd International Seminar on Science and Technology (ISST) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i1.3525

In this paper, computational study of Circulating Fluidized Bed (CFB) combustion is analyzed. The results are concern about volume fraction and velocity distribution along the boiler. Simulation result were present in velocity, volume fraction, and pressure profile in boiler. All discussed result are applicable to all type of fluidized bed boiler.This paper will concern about how fluidization and combustion occur in boiler. Simulation present in unsteady state, multiphase direction, k-ε standard turbulence model, species transport combustion model and DPM. In this simulation, fuel, air, and other input materials are defined by actual data from power plant operation. As a result of analysis, the variation of secondary air does affect the characteristics of fluidization and combustion in CFB system. The superficial velocity is found around 4.1 m/s. The pressure generated is about 6642.3 Pa in the windbox area, and in the middle furnace area about -868.6 Pa

The Experimental Study of The Effect of Air Preheating in MSW Pellet Multi-Stage Downdraft Gasifier Depi Rustam Ependi; Arif Rahman Saleh; Bambang Sudarmanta
IPTEK The Journal for Technology and Science Vol 30, No 2 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

High municipal solid waste generation in Indonesia can be used to substitute fossil energy. MSW is converted into pellet form to uniform moisture content. This study aimed to improve the performance of gasified downdraft gasifier processes by heating air inlets in pyrolysis, oxidation, and reduction zones. Variations of air temperature inlet in these zones are 80 oC, 110 oC, 150 oC, and 210oC. The results of this study obtained the highest air temperature at 210 ºC for 969 ºC. The syn-gas compositions (CO and H2) at an increase in temperature of 80-210 ºC increased from 21.4%, 9.99%, and 1.77% to 22.79%, 10.28%, and 1, 79% respectively. Cold gas efficiency increased by 5.13 % and the lowest tar level was 34.39 mg/Nm3. Based on the result of research, preheated air can improve the efficiency of gasification and reduce tar content in the syngas.

The Effects CNG Injection Timing on Engine Performance and Emissions Of A Diesel Dual Fuel Engine Moch. Aziz Kurniawan; Dori Yuvenda; Bambang Sudarmanta
IPTEK The Journal for Technology and Science Vol 30, No 2 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Sequential combustion process on diesel dual fuel engine with compressed natural gas (CNG) fuel was complex. The problems of diesel dual fuel with CNG gas are reduced thermal efficiency and resulting in high carbon monoxide (CO) and unburned hydrocarbon (HC) emissions. The right setting between combustion air, diesel pilot fuel, and CNG gas fuel can improvement the performance and emissions. The experiment was conducted with diesel fuel conventional and dual fuel mode with CNG fuel in a single cylinder, four strokes, constant speed (1500 rpm) diesel engine type diamond DI 800. Performance parameters such as thermal efficiency and specific fuel consumption (SFC), emissions such as CO, HC, and smoke density are determined at five starts of injection timing (SOI) CNG of 700CA, 900CA, 1100CA, 1300CA, dan 1500CA ATDC with ECU programmable of Vemstune software. The results indicated that retarded CNG injection timings improved engine performance and emissions diesel dual fuel. Start of CNG injection timing optimization at 1300CA ATDC with increased thermal efficiency 14,35% and decreased specific fuel consumption (SFC) 8,83 % . in addition, it decreased CO emissions 21,35%, HC emissions 17,93%, and PM emissions lower 34,98%. However, engine performance diesel dual fuel lower than a conventional diesel engine.

An Experimental Study of the Addition of Air Mass Flow Rate Using a 30% Emulsion-Fueled Diesel Engine at High Load Rosid Rosid; Bambang Sudarmanta; Lukman Atmaja; Salih Özer
Automotive Experiences Vol 3 No 2 (2020)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

The purpose of this study was to examine the addition of air mass flow rate into the combustion chamber using E30 emulsion fuel (Water 70% + Dex 30% + 2% surfactant tween 80 + span 80 ) on a Diamond DI 800 stationary diesel engine with an engine rotation of 1500 rpm. Characteristics evaluated using Combustion Analyze, and emissions measured with a Gas Analyzer. The results showed the addition of air mass flow rate affected engine performance and emissions with the engine power observed to have decreased by 0.016% while SFC and thermal efficiency increased by 2,077% and 33,053% respectively compared to diesel fuel. Moreover, the BMEP and exhaust temperature also decreased with the most optimum in BMEP found to be 0.02% and exhaust temperature at 285°C while diesel has 358°C. The analysis of the combustion process for E30 emulsion fuel with variations in the air mass flow rate added showed the peak cylinder pressure at high loads was at 0.018 kg/s at a pressure of 5.86 bar. Meanwhile, the optimum heat release rate at high loads was obtained at a variation of 0.013 kg/s. This, therefore, means adding air mass flow rate to the E30 emulsion fuel has the ability to improve performance and reduce engine emissions.

Comparative Study of Municipal Solid Waste Fuel and Refuse Derived Fuel in the Gasification Process Using Multi Stage Downdraft Gasifier Sigit Mujiarto; Bambang Sudarmanta; Hamzah Fansuri; Arif Rahman Saleh
Automotive Experiences Vol 4 No 2 (2021)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Municipal solid waste (MSW) is a type of general waste that includes households, traditional markets, commercial areas, and the rest from public facilities, schools, offices, roads, and so on. Refuse Derived Fuel (RDF) is obtained from the remnants of MSW which cannot be used anymore, which is flammable waste and is separated from parts that are difficult to burn through the process of chopping, sifting, and air classification. RDF has potential as an alternative energy source. In this study, RDF fuel was compared with MSW fuel both by proximate and calorific value, then the gasification process was carried out using a multi-stage downdraft gasifier to see gasification performance indicators such as syngas composition, LHV, cold gas efficiency, and tar concentration. The results showed that the gasification performance indicator for MSW biomass resulted in the syngas composition of CO = 19.08% v, H2 = 10.89% v, and CH4 = 1.54% v. The calorific value (Low Heating Value, LHV ) of syngas is 4,137 kJ/kg, cold gas efficiency is 70.14%, and tar content is 57.29 mg/Nm3. Meanwhile, RDF obtained the composition of CO gas: 18.68% v, H2: 9.5446% v, and CH4: 0% v. The maximum LHV syngas is 3365.08 kJ/kg, cold gas efficiency is 57.19 % and the smallest tar content is 80.24 mg/Nm3. When compared to RDF, MSW produces a better gasification performance indicator. However, RDF can still be used as an alternative energy source using the gasification process. The results of this study can be used to optimize the further RDF gasification process.

Co-Authors Abdul Gafur Achmad Rizkal Achmad Syaifudi Ahmad Arbi Trihatmojo Ahmad Gurnito Ahmad Tarmizi Alham A.K. Mahanggi Amalia Dwi Utami Anas Nurgito Ari Kurniawan Arif Rahman Saleh Arif Wahjudi Ary Bachtiar Krisna Putra Asnil Asnil Atok Setiawan Atok Setiawan Atok Setiyawan Bambang Pramujati Bambang Pramujati Budi Utomo Kukuh Widodo Cholifatus Eka Rahayu Cholifatus Eka Rahayu Depi Rustam Ependi Deviana Dyah Vianita Dicky Yoko Exoryanto Djatmiko Ichsani Dori Yuvenda Dwijo Hartono Eka Setiawan Seputro Erio Daniel Damanik Erzeddin Alwi Felix Dionisius Firlana Baiturrochman Ghulam Asrofi Buntoro Hamzah Fansuri Hanapi Hasan Hendra Bhakti Herman Sasongko Herman Sasongko Imam Maolana Is Bunyamin Suryo Jamaludin Jamaludin Jamaludin Jamaludin Jose da Silva Khadif Gicha Alifio Krismadinata Krismadinata Kuntang Winangun Lukman Atmaja Marthen Paloboran Martias Martias Mirza Hamdhani Moch. Aziz Kurniawan Mohammad Khoirul Effendi Mohammad Khoirul Effendi Muji Setiyo Ni Nyoman Suwarmini Nugroho, Giri Nur Ikhwan Oki Muraza Oki Muraza Pasca Hariyadi Winanda Putra, Randi Purnama Putri Almas Ilka Afifah Rahadian Zainul Remon Lapisa Rhema Adi Magiza Wicaksana Robi Etdji Pangestu Rosid Rosid Rozy Aini Hirowati Salih Özer Sampurno Sampurno Sampurno Sigit Mujiarto Soebagyo, Hary Sri Rizki Putri Primandari Suhardjono Suhardjono Suliono Suliono Tinovia Prasetyo Triyogi Yuwono Yuli Mafendro Dedet Eka Saputra Yusuf Kaelani Yusuf Kaelani

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