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ROTOR: JURNAL ILMIAH TEKNIK MESIN
Published by Universitas Jember
ISSN : 1979018x     EISSN : 24600385     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
ROTOR merupakan jurnal yang diterbitkan oleh Jurusan Teknik Mesin Universitas Jember yang memuat artikel ilmiah dalam bidang Konversi Energi, Design/Perancangan, Teknik Produksi, Material serta bidang lain yang terkait dengan Teknik Mesin. Semua naskah yang diterima ROTOR diterbitkan secara global dalam bentuk elektronik. Hasil penelitian yang diterbitkan dalam jurnal ini diharapkan dapat menambah khasanah pengetahuan di bidang Teknik Mesin serta menjadikan sarana bagi para profesional baik dari dunia usaha, pendidikan, ataupun peneliti untuk menyebarluaskan perkembangan ilmu pengetahuan dan teknologi di bidang Teknik Mesin melalui publikasi hasil penelitian.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 333 Documents
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PENGARUH TEMPERATUR UAP AIR NIRA AREN TERHADAP PRODUKSI ALKOHOL SEBAGAI BAHAN BAKAR ALTERNATIF Paul M. Rumagit; Fransiscus J. Tulung
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (309.211 KB) | DOI: 10.19184/rotor.v10i1.5143

Abstract

Destilationi Process for making of alcohol by fraksination vapour, can yield rate of high alcohol, with palm water newly tapped as a media. Equipment of Destilation designedly and also constructed from metal substance / stainles steel is a means of the examination, where component of equipments ; basin boiled of water , basin of palm water, channel of fracsination, alcohol arrester, cooler, and the hose of alcohol recervoir. The Examination of method is execute variation of change of temperature vapour palm water in boiled tube. For the vapour temperature 81 0C make the rate of alcohol 95%, vapour temperature 85 0C make the rate of alcohol 90% and the vapour temperature 90 0C yielding rate of alcohol 87%. Alcohol of rate is excelsior at temperature of palm water vapour which lower and also volume result of catching less be accompanied with duration of combustion time. Keyword : Equipment of Destilation, fraksination, alcohol, bio-fuel, palm of water
RANCANG BANGUN KONTROL PID PADA SPEED OBSERVER GENERATOR DC BERBASIS ARDUINO UNO M. Galih x Adi P.; Bambang Sri Kaloko
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (426.41 KB) | DOI: 10.19184/rotor.v10i1.5151

Abstract

In this study discusses the development of observer to the generator speed direct current (DC) that is controlled using the rotary encoder sensor built using the Arduino UNO with recording capability of the two systems is also compared. Testing is done to see readings observer error indicates that the observer is sufficient with an average error of 0.81% of the speed sensor readings in this case be used as a standard. Application of PID control as the control of the speed observer DC generators that keep the generator speed setpoint despite the load current increases. Referring to the curve of speed and power relations in the prime mover speed setpoint is to improve the reliability and performance of the DC generator. PID control makes speed generator is stable at voltage setpoint. PID parameters used are Kp = 0.77, Ki = 0.0083 and Kd = 0.0096. After applying PID control value obtained rise time of 0.51 s, the steady-state error 1:28%. Testing is done by giving a resistive load to the setpoint speed of 1500 rpm, 2000 rpm and 3000 rpm and load variations that are used 50 Ω and 25 Ω. For steady-state error value obtained supreme 17:21% when the setpoint of 3000 rpm and the lowest was 0.004% at 2000 rpm setpoint. The highest value of recovery time on a setpoint of 3000 rpm that can not be returned to the setpoint and the lowest was 0.6 s current setpoint 1500 rpm. Keywords: Arduino Uno R3, DC Generator, PID, Speed Observer
PENGARUH PRESENTASE ALKALISASI NaOH TERHADAP KEKUATAN TARIK MATERIAL KOMPOSIT SERAT DAUN NANAS POLYESTER DENGAN METODE VACUUM INFUSION Mohamad Irkham Mamungkas; Nur Subeki; Arief Andrian N.
ROTOR Vol 12 No 1 (2019)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.071 KB) | DOI: 10.19184/rotor.v12i1.14247

Abstract

Pineapple leaf fiber is currently widely used in furniture and handicraft industries (UKM) because besides being easily available, inexpensive, does not endanger health, can reduce environmental pollution so that later on as a composite reinforcing fiber can overcome environmental problems. From the considerations above, this study aims to determine the effect of the alkalization treatment (NaOH) on the tensile strength test of pineapple leaf fibers by vacuum infusion method and to determine the type of fracture of pineapple leaf fiber composites after tensile testing. Before it is made into a composite of pineapple leaves, it is soaked for 2 hours. Manufacture of composite materials based on ASTM D683-03 standard. From the composite tensile test results obtained the highest average tensile strength in specimens treated with NaOH 6% which is 112 MPa. While the lowest at 0% NaOH treatment is 68 MPa. Composites treated with NaOH have higher agility than those not treated with NaOH. The highest agility is found in composites with the highest NaOH treatment.
PENGARUH KECEPATAN RELATIF PERMUKAAN GESEK DAN TEMPERATUR TERHADAP KOEFISIEN GESEK BLOK REM KOMPOSIT KERETA API Agus Triono
ROTOR Vol 6 No 1 (2013)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.911 KB)

Abstract

Braking system is an important thing on safety of the train. In that process, kynetic energy  changed into thermal energy that would be known by the increasing of temperature at the surface and around the area of contact between the wheels and brakes. From research before, the increasing of contact temperature would lead a thermal crack on the wheel. Failure could be occure by that crack. Based on that results, research on the phenomenon of rising temperatures due to friction between wheel and railwould be very needed. In this paper,the effect of temperature and relative velocity of the surface to coefficient of friction would be studied. Experimental study of this paper using pin on disc test with 2 kg load and relative velocity variated from 4,61 m/s(400 rpm); 5,76 m/s(500 rpm) and 6,91 m/s(600 rpm).Results of this research shows that increasing temperature and relative velocity would lead an increasing of friction coefficient. Key word: brake, composite, temperature, friction coefficient, relative velocity
PENGARUH VARIASI DURASI CAMSHAFT TERHADAP UNJUK KERJA MOTOR BAKAR 4 LANGKAH Feri Setya Putra; Andi Sanata; Aris Zainul Muttaqin
ROTOR Vol 6 No 2 (2013)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1960.176 KB)

Abstract

To obtain maximum engine performance one way to do is to do modification the camshaft . Changes can be made to alter or modify the time to open and close the valve. As already unknow that big power generated by the engine is affected by the amount of residual gases that exit the combustion chamber. The amount of air and fuel mixture entering the combustion gases and regulated by the duration of the opening and closing of the valve.For it was necessary to study the extent to which the effect of the change by the duration of the camshaft to the increased power and torque of the engine, which can then be recovered size is definitely the most appropriate duration to generate great power and torque. Effective power produced at 220 ° camshaft duration variation is at 6000 RPM of 7.7 HP, variations in camshaft duration 227 °, ie at 8.49 HP at 6500 RPM, variations in camshaft duration 233 °, ie at 6500 RPM at 8.77 HP, variations in camshaft duration 239 °, ie at 9.53 HP at 6500 RPM. Average turning moment - resulting in maximum average variation of camshaft duration 220 °, ie at 6000 RPM of 1.37 Nm Variations camshaft duration 227 °, ie at 6000 RPM 1.43 Nm Variations camshaft duration 233 °, ie at 1.47 Nm at 6000 RPM Variations camshaft duration 239 °, ie at 6500 RPM of 1.51 Nm Keywords: effect of variations in the duration of the camshaft, power, torque, and fc (fuel concumtion).
ANALISA VARIASI JUMLAH LILITAN PADA ALAT PENGHEMAT BAHAN BAKAR TERHADAP EMISI GAS BUANG MOTOR BENSIN 4 LANGKAH Pratama PEP; Digdo Listyadi
ROTOR Vol 7 No 1 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.584 KB)

Abstract

Process combustion of fuel in room burn to be influenced by many factor , among others is temperature, closeness of mixture, composition, and turbulensi exist in mixture. When fuel temperature with air mount, hence will progressively easy  to  fuel with  the air  to on  fire.Gas emission  throw away which  is yielded  from combustion  process  at motor  vehicle  can  have  the  character  of  poison  and make  negative  effect  at environment around, the mentioned in causing by less perfect combustion process, gas result of less the combustion perfect for example is CO, HC.The purpose of this study was to determine the effect of the use of electromagnets  in  the  fuel  line gasolin engine 4 step with variations  in  the number of windings on exhaust emissions and  fuel consumption  . The study was conducted  in Laboratory Convert Energi Majors Technical Engineering Faculty Of Technique University Jember . Equipments which  is used  in  the  testing  is Motor gasoline 4 Step with machine brand Honda Supra x  125D, Gas Analyzer , buret, measure glass,  stop wach, tachometer , and accumulator 12 volt. used by materials is Premium RON 88, strand of metal  have diameter to 0,6 cm, pipe  have diameter to 1" with length 12 cm, and ring 18 cm.This study focuses on the variation of the number of windings on fuel saving devices on exhaust emissions of petrol 4 step. Analysis of the data sought includes AFR, Magnetic Field, Ampere each variation, emissions of CO gas (%), CO2 emissions (%), HC emissions (ppm), O  gas emissions (%). Fuel Consumption (FC). From the research  2conducted,  it can be concluded  that  the  larger  the number of winding electromagnets,  the more binding  the amount of oxygen in the combustion chamber , so it would be more optimal combustion. The lower the value of the FC (Fuel Consumtion), the lower the fuel consumption required for the performance of the engine. Variations in the amount of electromagnetic windings affect fuel consumption  . Fuel consumption is  the most efficient use of  the variation  found  in  the number of windings of  the coil 1000  fuel standard state conditions of 0.57 Kg / hr to 0.43 Kg / h at 3000 RPM rotation with increased efficiency of about 8.14% . Although these results are smaller than the results of previous research by 20.35 % , but at engine speed 9000 RPM FC  results of  this  study  resulted  in a  lower ,  ie 0.81 Kg  / hour compared  to 1.19 Kg  / hour.   Keywords : Magnetic Field, Emission Gas  throw away  , Fuel Consumtion.
Analisis Kekuatan Tarik dan Tekan Cetakan Pasir akibat Variasi Ukuran Butir dan Kadar Pengikat Pasir Cetak Sella Devianty; Ahmad Syuhri; Hari Arbiantara
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.328 KB)

Abstract

Molding sand is one the most important thing in sand casting. The weak tensile strength and compressive strength of molding sand causes some defects, such as sand drop and sand inclusion. Therefore this research is done by varying grain size and percentage of binder in molding sand. The purpose of this research was to analyze the tensile strength and the compressive strength of sand mold due to variation of grain size and binder presentation. Each treatment will through tensile strength test and compressive strength test, then the data from the test will be analyzed by using ANOVAfor factorial experiments with SPSS 16.0 and a significance level of 5%. From the research and analysis conducted found that the tensile strength of the molding sand is influenced by the grain size and binder presentation, meanwhile the compressive strength is influenced by the binder presentation but is not affected by the grain size. The highest average value of the sand mold tensile strength is 0.912 N/mm2 and the highest average value of the sand mold compressive strength is 2.7567 N/mm2. Those values are achieved by the use of a mixture of GFN 40-50 AFS silica with a percentage binder as much as 1.5%. Keywords: Molding sand, grain size, binder
ANALISIS OIL MONITORING SEBAGAI BAGIAN PREDICTIVE MAINTENANCE UNTUK UJI KESIAPAN OPERASIONAL BIG DIGGER KOMATSU Ahmad Taufiq; Nurida Finahari; Naif Fuhaid
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (212.329 KB)

Abstract

The performances of the equipments are measured by overall equipment effectiveness (OEE). This parameter consists of availability, operation reliability and product quality. Predictive maintenance system focus on measuring the effectiveness and availability of the vehicles used in the production process. The maintenance system usually done its work by analysis the lubrication oil used in parts of the vehicles. The parameters that will be analyzed are commonly consist of two testing procedures. The first is identify the state of lubrication performance, and the second is measuring the viscosity values of oil samples. This study try to developt the further test for the oil samples in the form of analyze the metal concentration consisted in. This procedure is meant to show the rate of part wearing as the basic of concluding the PM process. The alternative method offer maintenance cost optimation by avoiding the sudden breakdown  and prolong the part lifetime. The study is taking two type Big Digger Machine as comparator. The results show that the common PM has conclusion to let the PC 2000 stay in the process meanwhile the PC 4000 facing the overhaul and replacing the spareparts. The metal inclusion testing procedure show that the PC 2000 oil samples have higher metal concentration. It means that the PC 2000 parts need replacement more than PC 4000. The PC 4000 just need the overhaul process. This finding approve that alternative PM give more accurate results than the common. Keywords: oil monitoring, predictive maintenance, metal inclusion testing, big digger engine
PENGARUH VARIASI KONSENTRASI INHIBITOR EKSTRAK KULIT BUAH KAKAO TERHADAP LAJU KOROSI PIPA BAJA KARBON A53 PADA MEDIA AIR LAUT Adi Purnomo; Sumarji Sumarji
ROTOR Vol 8 No 1 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.347 KB)

Abstract

Corrosion is a chemical phenomenon that occurs in metal materials in a wide variety of environmental conditions. always good corrosion causing losses losses that are directly or indirectly impacted. one way of corrosion prevention is the addition of corrosion inhibitors. Corrosion inhibitor is a substance that is added to the medium to prevent or reduce the rate of corrosion of metals in the environment . In this study , the authors make use of a corrosion inhibitor cocoa peel extract from the rind of the results of maceration with the variation of the cocoa peel extract concentration was 0 ppm , 500 ppm , 1000 ppm , 1500 ppm and 2000 ppm in sea water media using specimens of carbon steel pipe A53,The purpose of this study was to determine the effect of variations in the concentration of cocoa peel extract against corrosion rate and efficiency of inhibitors that occur in the carbon steel pipe A53 and analysis form macroscopic and microscopic corrosion that occurs in the specimen by using a camera and test equipment microscope with 200x magnification. From the results of this study concluded that there are significant variations in the concentration of the tea leaf extract against corrosion rate of carbon steel pipe A53. At 2000 ppm concentration variation, occurred average value of the lowest rate of corrosion inhibitor that is 0,2384 mdd and highest efficiency 83.37 %.
OPTIMALISASI PRESTASI MESIN BENSIN DENGAN VARIASI TEMPERATUR CAMPURAN BAHAN BAKAR PREMIUM DAN ETANOL Andi Sanata
ROTOR Vol 5 No 2 (2012)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.537 KB)

Abstract

To reduce dependence on oil usage that increasing every day, many countries have adopted a substitution of petroleum fuels with renewable fuels such as ethanol is used as a blend in gasoline. Because ethanol can be produced from agricultural products such as corn, sugarcane, rice, etc., then the ethanol is one of the best alternative fuel in motor gasoline. Blending gasoline with ethanol would not fully produce a homogeneous mixture, need for additional treatment to obtain a more homogeneous results, one way is to heat the fuel. If the fuel is heated, there will be expansion or changes in fuel volume, in addition to the viscosity of the fuel will be decreased. It’s can be explained by the theory of thermodynamics, which states that the higher the temperature of a fluid, the fluid molecules will move quickly so at fixed volume will increase the pressure. Fuel with low viscosity will be atomized better, resulting smaller granules. With these conditions the process of mixing fuel with air will be more homogeneous so that the fuel burn more. The results obtained from testing the performance of the engine is the highest maximum torque obtained when using T40˚C fuel, with 6.37 Nm at 3400 rpm, increased 22.5%. The highest maximum power obtained when using T40˚C fuel with 3.450 HP at 5600 rpm, increased 5.11%. lowest Fuel Consumption average obtained at T40˚C fuel with 4.46% more efficient. Keywords: gasoline, ethanol

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