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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 327 Documents
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PENGARUH PROSES PENGADUKAN TERHADAP KARAKTER ADONAN DAN SIFAT BIODEGRADABLE PLASTIC YANG DIBUAT DARI BUNGKIL BIJI JARAK PAGAR Arbiantara, Hari; Darsin, Mahros; Lindriati, Triana
ROTOR Vol 6, No 1 (2013)
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Abstract

Manufacture of biodegradable plastics in this study begins with making the dough using a single screw extruder, then the dough is molded by using a compression molding machine. The basic material used is a mixture of jatropha seed meal, corn starch, CMC (composition 7: 2: 1). This study aimed to study the effect of Helic corner and screw compression ratio of the batter character and biodegradable plastic produced. Helic screw angle was varied from 2,5o; 5o; 7.5 ° and screw compression ratio varied from 1.5; 2.5; 3.5. The results showed an increase in the angle of screw Helic simplify the process of molding (lowering the value of Tg, Tm, ΔH and texture of the dough) and to improve the mechanical physical properties of the biodegradable plastic produced (tensile strength, strain increases while the thickness and Water Vapor transmition rate decreases). Improved compression ratio increase and decrease the thermal properties of dough texture and increase the tensile strength and strain, decrease the thickness and Water Vapor transmition rate of biodegradable plastic produced. Keyword: biodegradable plastic, mold, helical degree, compression ratio
Rancang Bangun Poltekom Electric Car Sebagai Modul Pembelajaran Teknik Mekatronika Bintarto, Redi; Kusyairi, Imam
ROTOR Vol 6, No 2 (2013)
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Abstract

POLTEKOM Electric Car  is one of POLTEKOM effort to help the government programs in the development of electric cars . Many problems of electric cars for example in high cost and difficulties to finding spare parts into several constraints of the college to make an electric car . For this study researcher tried to designed and built an cheap electric cars which is capable of being used for transportation vehicle, both for moving people and goods with a certain capacity . To prove the target of this research purpose, we perform the strength of the chassis test , acceleration test , braking test and climbs test . By the testing, it is known that POLTEKOM Electric Car  Able to move the maximum load of 200kg . Capable of driving a maximum of 35km/jam on flat road . Being able to climb the terrain with a slope of 15 degrees and is able to ride off after braking at a distance of 1 meter . By the datas that we collect during the test, it was analised and concluded that POLTEKOM Electric Car  has been able to be used as human and material handling which can then be used as a learning module in mechatronic engineering . Keywords: electric car, material and human handling
EKSTRAKSI DAN KARAKTERISTIK FISIK-KIMIA EKSTRAK KASAR POLISAKARIDA LARUT AIR (PLA) DARI TEPUNG BIJI DURIAN (Durio zibhetinus Murr) Herlina, Herlina; Djumarti, Djumarti; Yuli Andika, Evan
ROTOR Vol 6, No 2 (2013)
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Abstract

Seed durian flour (Durio zibethinus Murr) is the waste from durian fruit wich are potential to becomewater soluble polysaccharides (WSP) source beause it contains gum. Seed durian process to seed durianflour is a method to avoid damaged material. The The research was aimed to obtained optimum extractionabout the yield of crude extract water soluble polysaccharides (WSP) from seed durian flour i.e ratiomaterial and solvent 1:5; 1:10; 1:15, extraction temperature at 30; 40; 50o C, speed sentrifuges spin7000; 10.000; 13.000 rpm; ratio supernatant and ethanol 1:3; 1:4; 1:5, extraction time for 0, 1, and 2 hrs,along with to characterize crude extract water soluble polysaccharides (WSP) from seed durian flour. theresults showed that highest extraction yield was obtained in combination with 1:10 of ratio material andsolvent, 50 °C of extraction temperature,13.000 rpm of speed sentrifuges spin, 1:4 of ratio supernatantand ethanol, and 2 hrs of extraction. It yielded WSP of 3,56%, brigthness (L) of 49,32. This WSP containedwater, ash, fatty, protein, carbohydrate, and total sugar of 13,86%, 12,48%, 1,78%; 19,76%, 65,98 and 61,23% respectively. Keywords: Water soluble polysaccharides, extraction, seed durian flour
PENINGKATAN KUALITAS PRODUK UKM KURSI LIPAT DENGAN METODE INTERNAL PRESSURE DAN RANCANG BANGUN MESIN BENDING KONVENSIONAL Hermawan, Yuni; Mulyadi, Santoso
ROTOR Vol 6, No 2 (2013)
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Abstract

Product with quality obtained from existence of good forming process. Ovality one of deviation which is because of process bending. Process bending donewithout and internal  pressure. Internal pressure used: 100, 200, 250 and 300 bar. Equipments used in course of bending consisted of the hydraulic pump, pressure gauge, regulator / valve, T Fitting, Oli SAE 40 and Nivle Pipe ( NPT).For that require to be a research to analyse the hydraulic pressure influence to ovality process of bending of pipe of circular of raw material camp chair. Research done to designed experiment with the diameter tube 16, 19.05 and 25.4 mm. Its result hydraulic pressure yielding ovality minimum is for the D of tube 16 mm equal to 300 bar while for the D of tube 19.05 and 25.4 equal to 250 bar. Keywords: bending process, ovality and hydraulic pressure.
RANCANG BANGUN FLEXY BIKE SEBAGAI ALAT TRANSPORTASI ALTERNATIF KELUARGA INDONESIA Djumhariyanto, Dwi
ROTOR Vol 6, No 2 (2013)
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Abstract

Bicycle (human powered vehicles) is very popular transportation appliance in society, with all excess and its insuffiency. Design bicycle specially form and its size measure adapted for ergonomi of body  human being with the certain age, its meaning minibike just to children, while big bicycle just to adult or child with the high body. So that is not rarely met, at one particular family own some bicycle type, as according to its wearer. as a result required a broader place many for the menyimpan of bicycle. This matter enough become the big problem in cities, where farm for the house of progressively narrow. To finish the problem, this research designed and made by a bicycle which can be used by all age (except baby), the bicycle Flexy Bike. Flexy Bike is bicycle having function fleksible. That is bicycle which can be functioned in so many form and size measure, without lessening security and its freshment. Others, Flexy Bike designed to can be folded, so that earn easily kept without requiring wide place. Keywords: bicycle, scheme, flexible and Flexy Bike
Analisa Respon Antilock Braking System(ABS) dan Energi yang Dibutuhkan Selama Proses Pengereman pada Jalan Menurun Edoward R., Mochamad; Guntur, Harus Laksana
ROTOR Vol 6, No 2 (2013)
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Abstract

The process of braking on downhill roads require greater energy due to the influence of gravity work by vehicle due to the tilt angle . This paper reports the results of modeling and simulation responses ABS and energy required during braking on a straight - path trajectory decreases. Vehicles with ABS modeled mathematically to obtain the dynamic equations of the system. With the Laplace transform transfer function obtained from the vehicle with ABS. And with the help of MATLAB SIMULINK software obtained response vehicle speed, wheel speed, wheel slip, braking distance, and the energy required during the braking process. In this study used the roadway with a variation of the angle θ decreases of 100, 200, 300. Assuming the initial speed of the vehicle at 40kph , it can be concluded that the simulation results show stopping distance was 31.08m, 32.96m, 34.77m with a stop time for 5.169s, 5.325s, 5.464s sequentially in order of angular variation. While the maximum power required during the braking process is 1.88kW, 3.71kW, 5.44kW. The results of calculation of the energy required during the braking process can be used as a reference in planning a regenerative braking system, the utilization of the energy wasted during braking, especially on the downhill road conditions. Keywords: Braking Energy, Regenerative Braking System (RBS), Antilock Braking System (ABS), Modelling ,Simulation.
PENGARUH VARIASI DURASI CAMSHAFT TERHADAP UNJUK KERJA MOTOR BAKAR 4 LANGKAH Putra, Feri Setya; Sanata, Andi; Muttaqin, Aris Zainul
ROTOR Vol 6, No 2 (2013)
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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).
PENAMBAHAN DAN VARIASI DIMENSI SIRIP ALUMINIUM PADA TUBE TERHADAP LAJU DAN EFEKTIVITAS PERPINDAHAN PANAS DALAM HEAT EXCHANGER TIPE SHELL AND TUBE T., Rohman; Sutjahjono, Hary; Listyadi, Digdo
ROTOR Vol 6, No 2 (2013)
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Abstract

Heat exchanger is a device that serves to change temperature and the phase of fluid. By utilizing heat transfer between two fluids with different temperature from the higher temperature fluid to a lower temperature fluid. This study aims to determine the effect of the addition aluminum fins and dimensional variations on the effectiveness shell and tube heat exchanger. Heat Exchanger was tested by varying the dimensions of the aluminum fins on the tube from the tube without fins, fin tube with a length of 10 mm, 20 mm, and 30 mm. Tests carried out in counter flow so that the heat transfer rate will be better than the directional flow. Of the test will come out hot fluid temperature and cold fluid temperature out. The results showed decreases in the rate of heat transfer fins greater dimension and the dimension of the highest effectiveness without fins. The highest effectiveness is 25.85% in tube without fins. It can be concluded that the addition of fin in this research will reduce the effectiveness of the heat exchanger shell and tube type. Keywords: Aluminum, effectiveness, fin dimension, heat exchanger
PENENTUAN UKURAN OPTIMUM KAPASITOR BANK DAN DUMMY LOAD PLTMH DENGAN GENERATOR INDUKSI Setiawan, Andi
ROTOR Vol 6, No 2 (2013)
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Abstract

A technique of determining the size of the capacitor and dummy load for hydroelectric power generation system that uses an induction machine as generator is done by creating a model of the components and systems in Matlab and prepare the scenario of loading and setting of system parameters in order to obtain the size of the capacitor and dummy load were optimum at once . The simulation results can already provide information about the size of all these component sizes and once inform the maximum active power limit that can be borne by the generator . In this paper the assignment scenario is purely resistive load and therefore has not investigated whether the method could also be used to determine the size of the components of a system in which there are inductive loads . Keywords: Capacitor Bank, PLTMH, Asynchronous Generator
KOMPARASI EFISIENSI MATERIAL BAJA KARBON St 37, BAJA KARBON St 41 DAN BAJA KARBON St 60 TERHADAP LAJU KOROSI DI MEDIA AIR MUARA SUNGAI (PAYAU) DENGAN METODE ELEKTROKIMIA Nur Afandi, Yusuf; Sumarji, Sumarji
ROTOR Vol 6, No 2 (2013)
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Abstract

Mouth of the river is the meeting place of river water and sea water . water estuaries (brackish water) has asodium chloride content of between 1% -2.5 whether its from natural sources around the surrounding river water or a mixture of sea water . many construction or structure that is attached to the mouth of the river environment made of metal materials, especially carbon  steel.  the use of  steel  in building  structures  in estuaries  susceptible  to  corrosion  due  to  environmental  water  containing  chemical  elements  that  are corrosive. Factors  affecting  corrosion  such  as  temperature,  acidity  (pH),  salinity  (NaCl),  the  levels  of chloride  (Cl),  the  levels of  sulfate  (SO) as well as dissolved oxygen, causing easily corroded carbon  steel. This study aims to determine the Comparative Efficiency of Steel St 37, St 41 Steel and Steel st 60 on the rate of corrosion  in aqueous media estuaries with  tool Potensiostat methods. This research  is an experimental laboratory to design the post-test group design. From the results obtained data show the results of corrosion rate measurements made  in  this study  that  the greatest rate of corrosion occurring on  the steel material St 37 is 29.527 mpy, St 41  steel was 27.548 mpy, and  steel St 60  is 24,493 mpy. The  results  showed  that  the corrosion rate of steel st 37 has a very large corrosion rate in comparison steel and carbon steel st 41 high st 60. From the observation  in micro on  the  trid specimen  three  is corrosion  that resembles a uniform or evenly corrosion. A  form of  corrosion  that  results  in a uniform attack on  the  entire  surface of  the metal. Keywords: Estuaries, The Rate of Corrosion

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