Mega Nur Sasongko
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya

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Reduksi Volume Dan Pengarangan Kotoran Sapi Dengan Metode Pirolisis Wijayanti, Widya; Sasongko, Mega Nur
Rekayasa Mesin Vol 3, No 3 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The study was conducted to determine the change of mass, the shrinking volume and the heating value of char of cow dung induced by slow pyrolysis. The char produced by pyrolysis can be used as an alternative solid fuels. Besides, it can be a biochar as a mixture of biomaterial having a high-value materials. It due to the char has a high content of Carbon. In this experiment, the heating value of char was examined by using bomb calorimeter. The temperature pyrolysis was varied from 100°C to 500°C. Before the pyrolysis process, the feedstock was pulverized to a particle size of about 0.7 mm, and then it dried in the oven to have a moisture content up to 4%. The pyrolisis was conducted at varied temperatures and different heating rates from 0.13°C /sec to 0.29°C /sec.The results showed that the reduction of the cow dung volume performed significantly by the way of slow pyrolysis. The most reduced volume of cow dung occured very significant at the highest pyrolysis temperature, reaching 60% at 500°C. On the other hand, the heating rate variation did not influence in yield reduction, but it has an effect on the result of heating value of char. The results also indicated that the optimal of heating rate occured at 0.13°C/sec to 0.16°C/sec. In the visualization of the solid yield pyrolysis products, as higher pyrolysis temperature, as darker color of the char. It was shown the Carbon content in the char.Keywords: cow dung, pyrolysis temperature, heating rate, heating value, char
Metode Pirolisis Untuk Penanganan Sampah Perkotaan Sebagai Penghasil Bahan Bakar Alternatif Wijayanti, Widya; Sasongko, Mega Nur; Meidiana, Christia; Yuliati, Lilis
Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The research on the processing of organic municipal waste conversion has been done by using pyrolysis method. The research aims to gain an alternatif fuels and to minimize the landfill space. In the pyrolysis process, it was investigated the char formation as solid fuel as well as its heating value. The char formation was determined by the change of mass and volume of waste for minimizing landfill area.The waste compositions were obtained by surveying the 10 families during 10 days and then it was made the waste spesimens as the pyrolysis feedstocks. The pyrolysis processes were operated in range temperature 200oC to 400oC. Then, the char formations as pyrolysis products were tested by using bomb calorimeter to qualify the heating value of the products. The results showed that the waste was able to be a solid fuel due to the quality of its heating value. The increasing of the heating value could reach 150% from unpyrolyzed waste to pyrolyzed one. In addition, the pyrolysis method was able to significantly minimize the volume of waste, so that it has a potential way to overcome the need of a large landfil area in which it could reduce up to 50% in mass and 85% in volume. In waste pyrolysis method, it was only needed 2 hours operating process and low-temperature process (only up to 300oC). It did not require require a high-operating temperature, therefore, the handling of municipal organic waste to save area landfill and produce alternative fuel could be done in short time and did not require great energy.Keywords: waste, conversion energy, alternatif fuels, pyrolysis
Karakteristik Pembakaran Dan Sifat Fisik Briket Ampas Empulur Sagu Untuk Berbagai Bentuk Dan Prosentase Perekat Fretes, Evedore Fredo de; Wardana, I Nyoman Gede; Sasongko, Mega Nur
Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Fossil fuel reserves are depleting to be anticipated by looking for alternative energy sources. Alternative energy that many developed and researched today is agricultural waste biomass fuel is formed into briquettes. In this research, briquettes are made from dregs the pith of sago in the four of form, namely : cylinders, blocks, cubes and prisms, with and without adhesive sago starch with the presentation of 5% and 10%.This research aimed to determine the effect form briquettes on the combustion rate and determine the physical properties of briquettes without carbonization process, with or without the addition of sago starch as an adhesive which include moisture content, ash content, volatile matter, fixed carbon and heating value.The results research that the form of briquettes affects the combustion rate where the fastest combustion speed was on briquettes form beams, cube and Prism. Percentage adhesive of sago starch affects the early combustion time where time is needed to ignite the briquettes greatest for percentage 10% and the lowest adhesive for briquettes without adhesives. Adhesive sago starch is also very influential on the moisture content, ash content, volatile substances, fixed carbon and heating value. Adhesive sago starch is also very influential on the moisture content, ash content, volatile matter, fixed carbon and heating value. The addition of adhesive sago starch lower heating value.Keywords: Briquettes, sago, Physical Properties, Combustion.
Pengaruh Prosentase Campuran Briket Limbah Serbuk Kayu Gergajian Dan Limbah Daun Kayuputih Terhadap Nilai Kalor Dan Kecepatan Pembakaran Malakauseya, Jeffrie Jacobis; Sudjito, Sudjito; Sasongko, Mega Nur
Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Briquette is one of alternative energy. Raw material briquettes can be derived from agricultural waste and forestry plantations. Many factors that influence on briquette such as the type of materials, adhesives and pressure others. Adhesives used are sago starch waste that has been disposed and can no longer be consumed by humans. Raw material briquettes from waste of sawdust and sawn eucalyptus leaves. Pressure briquette of 30 PSI. Both raw material briquettes sieved with 20 mesh sieve qualify. From the results, the average calorific value of briquettes is the highest of 4896.16 calories / gram at 40% mixture of sawdust sawn 60% powder mixed with eucalyptus leaves. Percentage of ash content lowest average was 2.17%.Keywords : Briquette, adhesive, sawdust, eucalyptus.
Efek Freezing Damages dan Temperatur Distilasi terhadap Hasil Minyak Atsiri (Nilam) Hamidi, Nurhkolis; Ariyanto, Adhy; Sasongko, Mega Nur; Sugiarto, Sugiarto
Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Essential oils are a great group of vegetable oils in the form a viscous liquid at room temperature but easily evaporate so as to provide a distinctive scent. Indonesia is the worlds largest patchouli oil each year to supply about 75% of the world, but seen from the quality and quantity did not experience much change. This is due to most of the units of the oil still using simple technology / traditional and generally has a limited production capacity. Problems like this need to find a solution with one of the ways that pre-distillation using a freezing effect on the leaf so that the cells will be damaged so that the distillation process will be easier and get the quality of good patchouli oil. Freezing performed on fresh leaves and stems with a temperature variation of 13.8, -19.6 and -24.8 º C, while the temperature of distillation varies the 95, 105 and 115 º C, the clotting time for 2 hours. The results showed the presence of the lower freezing temperature the higher freezing the higher the content of patchouli alcohol (C15H26O), was to the effect of the higher distillation temperature distillation temperatures accelerate the process of spending patchouli oil from the leaves and stems.Keywords: Essential Oil, Predistillation, Temperature, Patchouli Alcohol (C15H26O)
Pengaruh Variasi Lip Thickness pada Nozzle Terpancung terhadap Karakteristik Api Pembakaran Difusi Concentric Jet Flow Faizal, Elka; Widodo, Agung Sugeng; Sasongko, Mega Nur
Rekayasa Mesin Vol 7, No 1 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2016.007.01.3

Abstract

Nozzle shape greatly influence turbulence between the fuel, air and formation of flow recirculation zone to produce a homogeneous mixing and get a near-perfect combustion. The recirculation zone is area that caused by flow rate breakdown, causing vortex and backflow around the end of nozzle. This backflow that hold up while lowering the flame so the flow rate of fuel and air mixture maintained lower or equal with flame speed. This study used variation of lip thickness of truncated nozzle 0, 4, 8, 12, and 16 mm.To obtain flame stability, fuel velocity and air velocity were variated. Thermocouples were used to measure flame temperature and its distribution. The results showed that stability of concentric jet diffusion flame flow increased with narrow lip thickness on a truncated nozzle. The wider stability area obtained in 4 mm lip thickness. In addition, temperature on diffusion flames concentric jet flow also more evenly distributed evenly with size of the nozzle lip thickness. The highest temperature and temperature distribution in the horizontal direction were occured in in the nozzle with lip thickness of 0 mm. A shadowgrapgh visualization was also used to identify phenomena of the nozzle exit flow.
COFFEE BEANS DRYING USING THE ELECTRICAL ENERGY OF MICRO-HYDRO POWER PLANT AT ANDUNGBIRU, TIRIS, PROBOLINGGO sasongko, mega nur
Journal of Innovation and Applied Technology Vol 2, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jiat.2016.002.02.10

Abstract

Coffee bean dryer is one of the solutions to solve the problems in the village of Andungbiru, Tiris, Probolinggo. The drier can be used to minimize the power loss in micro hydro power plant and increase the production of coffee without depending on the weather and sunshine. This coffee dryer was designed to have a compact and mobile. It consisted of 20 vertical drying rack arranged to save the energy. Using the drier, time and human energy used for drying coffee became shorter and more efficient. The cost was five times more cheaply compared to drying in a conventional manner. Besides, the application of coffee dryer was also be used for drying grain because it was equipped with temperature control to regulate the temperature inside the oven. The use of this coffee dryer had other benefits for management micro-hydro power plant. Electrical energy from micro hydro plant which usually discarded during the day, could be used for the processing of coffee
THE EFFECT OF CRYSTALLIZER ROTATION ON THE GAS HYDRATE PERFORMANCES Wijayanti, Widya; Sasongko, Mega Nur; Hamidy, Nurkholis; Purnami, Purnami
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2017.004.01.2

Abstract

The performance of hydrate was shown by the hydrate formation rate, the hydrate stability, and the storage capacity. In the study, we investigated the hydrate performance by influencing the rotation of crystallizer that predicted to increase the agitation of the hydrate performance. The hydrate represent the bond of water molecules and gas absorbed by the water molecules. In the experiment, we used the 50% propane and 50% butane as the gas absorbed. The gas was injected in a crystallizer at 3 bar pressure, then the crystallizer was rotated by 100, 200, and 300 rpm. The results shows that the best performances of hydrate when the crystallizer was rotated at 300 rpm. The crystallizer rotation speed of 300 rpm had the highest the formation rate and the decomposition rate. The highest decomposition rate indicated  the highest stability. Meanwhile, the highest hydrate storage capacity was also occured at the rotation  of 300 rpm  as 2809 V / V.
EXHAUST EMISSIONS OF 4 STROKE SPARK IGNITION ENGINE WITH INDIRECT INJECTION SYSTEM USING GASOLINE-ETHANOL FUEL Sasongko, Mega Nur
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2017.004.01.8

Abstract

Gasohol can be replaced in the spark ignition engine (SI engine) as gasoline substitution having lower emissions exhaust gas, making it more environmentally friendly. The aim of study was to investigate the effect of gasoline- ethanol  ratio on the gas exhaust emission of SI engine injection system. In this study, it was used the 4-stroke gasoline engine injection system by using the injector as a fuel input device. The engine had a 124.8 cc single-cylinder engine with compression ratio of  9.3:1. The variations of gasohol were gasohol E0, E10, E20, E30, E40, E50, E60, E70, E80, E90 and E100 with range of speeds; 1500 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm, 4500 rpm and 5000 rpm. The research was run by rearranging the standard ECU to obtain the AFR stoichiometric of each gasohol mixture. The exhaust emissions were measured by using the Stargas-898. The results show that the addition of ethanol content was able to increase the CO2 emissions , however, it would decrease the CO and HC levels. Compare to the gasoline fuel, gasohol has a lower emission of CO, HC and higher of  CO2 and O2 emissions.
Simulasi Numeris Karakteristik Pembakaran CH4/CO2/Udara dan CH4/CO2/O2 pada Counterflow Premixed Burner Wicaksono, Hangga; Sasongko, Mega Nur; Widhiyanuriyawan, Denny
Rekayasa Mesin Vol 8, No 2 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2017.008.02.6

Abstract

The high amount of CO2 produced in a conventional biogas reactor needs to be considered. A further analysis is needed in order to investigate the effect of CO2 addition especially in thermal and chemical kinetics aspect. This numerical study has been held to analyze the effect of CO2 in CH4/CO2/O­2 and CH4/CO2/Air premixed combustion. In this study one dimensional analisys in a counterflow burner has been performed. The volume fraction of CO2 used in this study was 0%-40% from CH4’s volume fraction, according to the amount of CO2 in general phenomenon. Based on the flammability limits data, the volume fraction of CH4 used was 5-61% in O2 environment and 5-15% in air environment. The results showed a decreasing temperature along with the increasing percentage of CO2 in each mixtures, but the effect was quite smaller especially in stoichiometric and lean mixture. CO2 could affects thermally (by absorbing heat due to its high Cp) and also made the production of unburnt fuel species such as CO relatively higher.