R.E.M. (Rekayasa Energi Manufaktur) Jurnal
Not a member yet
154 research outputs found
Sort by
Karakterisasi Laju Korosi Baja ST 40 Berlapis Polyester Putty Dalam Lingkungan Air Payau: Corrosion Rate Characterization of ST 40 Coated Polyester Putty Steel In Brackish Water Environment
No full textThe attack caused damage of corrosion (rust) is the general problem that causes the degradation of the material as the interaction with the environment and shorten the lifetime of material. Steel ST 40 is a common material used in the industrial, shipping, engineering products, home wares and others. Prevent the occurrence of direct contact with the outside environment by using a coating of polyester putty, serves to prevent the occurrence of oxidation reactions of the nature of corrosion. Coating using polyester putty give influence on the material test of resistance to corrosion. The missing mass on the specimen using a coating of polyester putty of mass loss reached 2,090 mg. whereas in the specimen undergoes the smallest mass loss of 1,090 mg. Whereas in the material without upholstery polyester putty of mass lost most of the specimens that do not use coating polyester putty with the missing mass reach 4,390 mg. Whereas in the specimen menggalami the smallest mass loss of 3,560 mg. On the specimen that is experiencing the highest rate of corrosion occurred in unpublished material using polyester putty of 26.11 Mpy whereas the smallest lajukorosi reached 21.52 Mpy. While the biggest missing mass on a material without polyester putty of 0.98 Mpy, the rate of corrosion of the smallest reach 0.56 Mpy
Model Energi Pembangkit Listrik Tenaga Surya di Pulau Giliyang Madura: Energy Model of Solar Power Plant on Giliyang Island, Madura
No full textGiliiyang Island is a famous island that has the highest oxygen content in the world, and very beautiful sea, but the location is far from PLN / elctictric grid system. It is necessary to develop environmentally friendly alternative energy. One of alternative energy offered is solar energy. Solar energy is energy that’s form of light and heat from the sun. This energy can be utilized using a range of technologies such as solar heating, solar photovoltaic, solar thermal power, solar architecture, and artificial photosynthesis. Based on the calculation is known that the electrical energy demand for Giliiyang Island is around 1984 kWh. The design of two off-grid solar power systems which each capacity about 1 MWp will require 3000 m2 of land with 780 solar panels that have an intensity of 800 W / m2. Deep cycle battery with 24 V DC 200 AH as storage media required about 504 pieces
Studi Numerik Optimasi Propeller Kapal Selam 29 meter Dengan Menggunakan High Skew: Numerical Study of 29 meter Submarine Propeller Optimization Using High Skew
No full textIndonesia is an archipelagic nation and most shallow water channel in Western Indonesia, making the concept of mini submarine use by the Navy to be the right choice. One of the most important engineering is to design a mini submarine propeller with a high level of optimization. This research method is based on the result of numerical simulation using Computer Fluid Dynamic (CFD) which use B-series as base with skew variation 36o, 45o, 54o. It is expected that the results of this research can provide solutions in the selection of efficient design propeller for mini submarine 29m. With the open water diagrams generated then obtained the greatest efficiency value on B4-522 with skew obtained at 45 ° skew angle. The optimum velocity value is at J = 0.07 at 8.9 knots with an efficiency value of 0.856
Simulasi Numerik Aliran Melewati Nozzle Pada Ejector Converging – Diverging Dengan Variasi Diameter Exit Nozzle: Numerical Simulation of Flow Through the Nozzle In Ejector Converging – Diverging With Variation of Exit Nozzle Diameter
No full textIn the process of cooling or refrigeration, are required components where capable to flow the fluid to create a cycle of the cooling process. Among some of the vapor compression systems, the usage of ejector is the simplest system. Ejector has three main parts: primary nozzle, mixing chamber and diffuser. Various experiments of steam ejectors developed to increase the value of the COP. Entrainment ratio directly affects to the COP value generated by the system, where the geometric shapes and operating conditions in the steam ejector will affect to the value entrainment ratio. This research was carried out numerical simulations using CFD commercial software with k-epsilon to predict flow phenomena which passes through the ejector nozzle in the ejector converging-diverging which varying exit diameters 3.5 mm; 4mm; 5 mm; and 5.5 mm. Respectively the simulation results showed exit nozzle steam ejector that the smallest diameter of 3.5 mm give the optimum performance because it provide the highest speed of fluidity. While the state of vacuum in mixing chamber increase, it cause the secondary mass flow higher as well as the value of the entrainment ratio
Pengaruh Jarak Tempuh Terhadap Viskositas Oli A, B dan C Pada Sepeda Motor Yamaha Mio Tahun 2011: Effect of Mileage on Oil Viscosity A, B and C on Yamaha Mio Motorcycles in 2011
No full textLubrication can be interpreted as the provision of lubricants on a machine with the aim to prevent direct contact between the moving surfaces. Viscosity is a very important trait in lubricating oils. The viscosity of lubricating oil indicates the ability and ease of lubricating oil flowing. Distance is a number that indicates how far an object changes position through a particular path. This research method using Yamaha mio 110 cc motorcycle. Using SAE 10W-40 oil with the initial viscosity of oil A(3.17), B (5,18 ), C (15,0 ). Then tested with a distance of 30.60 and 90 km with a constant speed of 70 km / h and then taken the oil sample. The result of the test is calculated using the viscosity formula with the law of Stockes. When it was on 90 km speed, Oil C still shows the highest viscosity with a value of 2.55, while oil A remains the lowest viscosity with a value of 1.70 . This study shows that the higher the viscosity affects lubrication. The more oil layers, the lubrication can do better and the duration to changes the oil will affected too (longer)
Analisa Pengaruh Gerak Makan Dan Putaran Spindel Terhadap Keausan Pahat Pada Proses Bubut Konvensional: Analysis of the Effect of Feeding Motion and Spindle Rotation on Tool Wear in Conventional Lathe Processes
No full textThis paper discuss the effect of feeding motion and spindle rotation and also the relationship between feeding motion and spindle rotation on wear of tool in conventional lathe process. In this study the machining parameters are feeding motion (f) that varied at 0.12 mm/rev, 0.24 mm/rev and 0.35 mm/rev. With spindle rotation (n) that is 300 rpm, 650 rpm and 1000 rpm. While the cutting depth (a) is 0.5 mm. Then, the wearing edge of the tool was tested. The result of wear test in the edge of tool, show that (1) the greater the feeding motion the higher wear value of tool and the relationship is positively linear; (2) The larger the spindle rotation the lower wear value of tool will be and the relationship is negatively linear
Pengaruh Variasi Karbon Aktif dan Waktu Tahan Terhadap Kekerasan Material JIS G-3123 Menggunakan Metode Pack Carburizing: Effect of Variation of Activated Carbon and Hold Time on Hardness of JIS G-3123 Material Using Pack Carburizing Method
No full textImprovement of mechanical feature in metals are necessary for industrial development. In industries, it requires the mechanical features, such as frictional strength and good wear resistance. Carburizing is a heat treatment process that produces toughness surface in the presence of carbon-bearing material. The carburizing process of JIS G-3123 steel was performed by Pack Carburizing method with divergent variation of activated carbon weigh(s) 125 grams, 250 grams, and 400 grams and selected holding time in range of 30 minutes, 45 minutes, and 60 minutes. In the result, it was obtained 463.550 kg / mm2 for the highest value of toughness with the weight of 400 gr activated carbon and holding time of 30 minutes. Therefore, it indicated that the higher weight of activated carbon in the carburizing process, the material hardness value will be higher as well, with the lowest holding time
Analisa Kualitas Semen Melalui Pengukuran Konstanta Dielektrik Dan Resistivitas: Cement Quality Analysis Through Measurement Of Dielectric Constant And Resistivity
No full textCement is an adhesive material that is capable of tying dense ingredients into one solid unity, cement was used as construction materials. Any materials including cement has physical properties and is largely determined by the magnitude of the internal condition of the materials. This research was conducted to find out the quality of cement by using measurements of the dielectric constant and resistivity values. The materials examined in the form of 3 brands of cement mixed with sand and water. This research method using capacitive and resistive by using an oscilloscope as a voltage reader. Note that the three cement brands have the same dielectric constant value i.e. amounting to 0.30 and resistivity value of 30.00 Ωm on day 28. The relationship between the dielectric constant value against the addition of age showed a decrease, while for values of resistivity shows an improvement. Onthe measurement of the dielectric constant shows that cement A brand more quickly achieve drying compared to brand B and brand C, as for the measurements of the resistivity shows that cement brand C more quickl yachieve drying compared to cement brand A and brand B
Optimasi Parameter Pemesinan dengan Proses Bubut pada Respon Kekasaran dan Kekerasan Permukaan Material S45-C Menggunakan Metode Taguchi - Grey - Fuzzy: Optimization of Machining Parameters with Lathe Process on Roughness Response and Surface Hardness of S45-C Material Using Taguchi - Gray - Fuzzy Method
No full textTurning is a widely used machining process in which a single-point cutting tool removes material from the surface of a rotating cylindrical work piece..Process efficiency increase significantly can be obtained by optimizing the process parameters, namely spindle rotation (n), feed rate (f) and depth of cut (a). In this research will optimize the surface roughness and hardness simultaneously using a combination of turning process parameters. The research was conducted on the material S45-C.
Taguchi method is used, which is a combination of fuzzy logic and Taguchi method. Matlab software that has Matlab fuzzy toolbox aided fuzzy logic process. Design experiment using orthogonal array L9 (33) varying the three parameters which each parameters has three levels. Experiment design of L9 orthogonal array varied factor or cutting parameters such as spindle rotation (n), feed rate (f) and depth of cut (a). Since noise factors are excluded from the experimental design, the experiments were conducted with replication. Optimization was done by using grey-fuzzy Taguchi method. The results of the optimization process is a combination of parameters that result in an optimal response. Based on a combination of these parameters will be carried out confirmation test. Confirmation test was done to match the prediction results with the actual response.The results showed a combination of turning process parameters of S45-C that can generate the optimal response is spindle rotation (n)605 Rpm, feed rate (f) of 0,031 mm/minand depth of cut (a) of0,125 mm
Karakteristik KERS E3 (Kinetik Energi Recoveri Sistem Evolusi 3) Sebagai Pengisi Energi Listrik Kendaraan Listrik Universitas Jember: Characteristics of KERS E3 (Kinetic Energy Recovery for Evolutionary Systems 3) as a Charger for Electric Vehicles at the University of Jember
No full textMobil listrik ketika berjalan memerlukan proses pengisian energi listrik dengan harapan jarak tempuh mobil listrik semakin jauh. Proses pengisian energi listrik menggunakan KERS E3 yang merupakan pengembangan KERS terdahulu yang dilakukan penelitian pada tahun 2013 dan 2014. Sehingga pada tahun 2015 dilakukan proses pengambilan respon CVT terhadap flywheel yang dipakai di KERS E3 menggunakan motor listrik sebagai penggerak mula dengan fungsi ramp yaitu motor listrik berputar dari putaran 0 rpm sampai puncak yaitu 5640rpm. Hasil dari pengambilan respon berupa putaran flywheel dengan motor listrik berdaya 1 HP dicapai dalam waktu 15 detik. Flywheel mempunyai massa : 1.82kg, luas permukaan : 0.0596m2 , inersia :0.18472 kg.m2 dengan hasil energi kinetik rata-rata 78159,89 joule. Transmisi yang menghubungkan dari putaran mula ke flywheel menggunakan CVT konvensional. Dari proses pengambilan data yang dilakukan selama tujuh kali, Pengereman Energi Kinetik yang diberikan oleh generator (Proses Konversi Energi) terjadi dalam waktu 38 detik dengan kehilangan energi kinetik 51387.60 Joule. Sehingga kemampuan KERS generasi 3 membangkitkan energi kinetik sebesar 26772.29 Joule