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Jurnal Energi Dan Manufaktur
Published by Universitas Udayana
ISSN : 23025255     EISSN : 25415328     DOI : -
Core Subject : Science, Engineering,
Energy Industrial & Manufacturing Engineering
"Jurnal Energi dan Manufaktur" is a journal published by Department of Mechanical Engineering, University of Udayana, Bali since 2006. During 2006-2011 the journal's name was "Jurnal Ilmiah Teknik Mesin CAKRAM" (Scientific journal in mechanical engineering, CAKRAM). "Jurnal Energi dan Manufaktur" is released biannually on April and October, respectively. We invite authors to submit papers from experimental research, review work, analytical-theoretical study, applied study, and simulation, in related to mechanical engineering (energy, material, manufacturing, design) to be published through "Jurnal Energi dan Manufaktur".
Arjuna Subject : -
Articles 387 Documents
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Optimasi Kondisi Pemesinan untuk Kekasaran Permukaan pada Proses Slot Milling Baja Tahan Karat AISI 304 Amrifan Saladin Mohruni; Erna Yuliwati; Redy Kholif Muhrobin
Jurnal Energi Dan Manufaktur Vol 8 No 1 (2015): April 2015
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Dalam slot millingbeberapa parameter berkontribusi penting untuk mencapai kekasaranpermukaan benda kerja yang sesuai dengan kebutuhan. Diantara parameter-parametertersebutadalah kecepatan potong dan laju pemakanan, yang untukpencarian parameterkondisi pemesinan yang optimum sangat diperlukan. Dalam rangka pencarian kondisipemesinan yang optimumperlu dibuat model matematis empirik yang dapat menggambarkanhubungan antara parameter-parameter tersebut. Pada penelitian ini pembuatan modelmatematik empirik dilakukan menggunakan metodologi permukaan respon (ResponseSurface Methodology) pada sebuah plat stainless steel AISI 304 dengan dimensi adalah 150mm x 100 mm x 10 mm. Dari hasil optimasi diperoleh bahwa kecepatan potong dan lajupemakanan yang menghasilkan respon Ra0,510 ?m yang optimal berturut-turut adalah 30m/min dan 0,15 mm/tooth. Sementara itu, nilai Ra yang terbesar yang diperoleh dalampengujian ini adalah 4,783 ?m.Kata kunci: optimasi,slot milling, stainless steel AISI 304, response surface methodologyIn slot milling, some parameters give important contribution to achieve required surfaceroughness of work pieces. These parameters are cutting speed and feed rate, which arerequired for finding of the optimum cutting conditions. In order to find this optimum cuttingcondition, it is necessity to generate the empirical mathematical model, which figured out therelationship among the involved parameters. In this study, the response surface methodology(RSM) was used in constructing of empirical mathematical models on stainless steels AISI304 (150 mm x 100 mm x 10 mm). The optimized surface roughness Ra0, 510 ?m wasresulted using cutting speed and feed rate 30 mm/min and 0,15 mm/tooth respectively. Incontrary, the maximum surface roughness Ra achieved is 4,783 ?m.Keywords: optimization, slot milling, stainless steel AISI 304, response surface methodology
Studi Eksperimental Pengontrolan Air Conditioning System Dengan Fuzzy Logic Control Sudirman -; I Gusti Bagus Wijaya Kusuma; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Electrical energy available in Indonesia at this time is not yet sufficient for all existing activities, this can be proved byfrequent occurrence of blackouts in several areas in Indonesia. It is necessary for a saving in electrical energy consumptionin all sectors, it is one of the refrigeration system. Research was conducted by testing AC (3 HP / 3 phase) using 2 differentcontrol systems, namely conventional control and FLC. Testing is done by placing the indoor units in cold storage room.Each test performed with varying load in the test room, ie no light burden, lamp 1000 Watt, and lamp 2000 Watt. Testingusing a conventional control system set point temperature 26 ° C and 3 variations of the differential is 1 , 2 and 3 , the FLCusing the temperature setting point 26 ° C. From this research we can conclude that the application of FLC system produceselectric energy consumption of the lowest compared to conventional control in this case is the differential 1. FLC applicationof electrical energy consumption at load 1000 Watt lower 11% and the load 2000 Watt 4% lower compared withconventional control in diffrensial 1.
Laju perambatan retak plat aluminium 2024 T3 dengan beban fatigue uniaksial pada rasio beban dan jarak diameter lubang berbeda Budi Luwar Sanyoto; Wajan Berata
Jurnal Energi Dan Manufaktur Vol 3, No.2 Desember 2008
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Producing of component by machining process can yield component defective. That defective in crack form, although it probably is very litlle. If that defective is applied by a syclic load, the defective exist will propagate with a propagation rate until a limit where that structure is not able to restrain load applied to it. In this research, the specimen to be used was plat Al 2024 T3 with open hole, constant diameter and different distance between hole. Testing to be done by giving fatique load with ratio 0,3, according to ASTM standard E-647-93 (1994). The data to be collected were crack length and the number of load cyclic. Further, it is calculated crack propagation rate (da/dN) toward strength intensity factor (?K). The result of investigation shows that crack propagation rate curve of strength intensity factor function in the Paris area has Paris constant m = 1,163 until 4,2, and value of C = 1,69E-12 until 9, 34E-09
Penambahan Cil Pada Desain Sistem Saluran (gating system) Low Pressure Die Casting (LPDC) Untuk Mereduksi Kebocoran Akibat Hole Ada Produk Kran Hotel Dengan Simulasi Procast V2008 Muhammad Fitrullah; Koswara Koswara; Ricky Parmonangan
Jurnal Energi Dan Manufaktur Vol 7 No 1 (2014): April 2014
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak : Kuningan merupakan paduan logam yang memiliki performa estetis yang tinggi sehinggabanyak dipakai untuk produk kran. Performa estetis ini menjadikan kran dari kuningan banyakdipakai di dunia perhotelan. Secara umum, produk kran dihasilkan melalui proses casting(pengecoran) yang dirancang melalui sejumlah simulasi guna menghasilkan produk dengankualitas tinggi. Pengecoran logam kuningan sering digunakan metode Low Pressure DieCasting (LPDC). Simulasi pengecoran adalah metode yang sangat baik untuk dapat melihatpenuangan logam cair pada cetakan, proses solidifikasi dan pendinginan, dan memprediksiletak cacat yang akan terjadi seperti shrinkage, porositas, inklusi, hole. Pada industripengecoran kran, banyak cacat pada produk hasil coran, yaitu: 8% produk bad, yang artinyaproduk tidak bisa digunakan atau harus di lebur ulang dan 24% produk modifikasi dengan cacatyang paling sering terjadi adalah “bocor” dan “hole” yang artinya produk mendapatkanperlakuan khusus karena terjadi cacat tetapi masih bisa ditanggulangi. Hal ini sangat merugikanperusahaan baik dalam biaya produksi yang menjadi meningkat dan waktu produksi yangsemakin lama. Penelitian ini bertujuan untuk menganalisa arah pembekuan logam yang terjadipada proses low pressure die casting pada produk kran dan membuat desain sistem saluranlow pressure die casting untuk produk kran untuk mereduksi kebocoran akibat cacat hole.Metode yang digunakan dengan finite element method (FEM). Melakukan observasi proses lowpressure die casting untuk produk kran, membuat desain sistem saluran yang sudah dimilikiPT.X dengan menggunakan solidwork 2010 dan mensimulasi dengan procast v2008. Hasilsimulasi diamati sehingga diketahui letak cacat yang terjadi dan membuat desain yang baruagar didapat hasil yang maksimal. Hasil simulasi yang diamati ada daerah yang mengalamipremature solidification sehingga dapat menghasilkan hole dan poros. Penambahan cil padasistem saluran menjadi solusi yang tepat untuk meminimalisasi cacat hole dan porositas yangada. Daerah yang mengalami premature solidification dikenakan suhu yang lebih rendah darilogam kuningan cair sehingga daerah tersebut lebih cepat membeku dan terjadi pembekuanyang terarah.Kata kunci: Pengecoran, LPDC, hole, poros, premature solidification, pembekuan.Abstract : Brass is an alloy that has a high aesthetic value that is widely used for product faucets. Thismakes the aesthetic value of brass faucet widely used in the world of hospitality. In general,faucet products produced through the casting process through a number of simulationsdesigned to produce high quality products. Brass foundry frequently used method of LowPressure Die Casting (LPDC).Casting simulation is an excellent method to be able to seepouring molten metal in the mold, solidification and cooling process, and predicts the location ofdefects that will occur such as shrinkage, porosity, inclusions, holes. In the foundry industryfaucets, many defects in castings products, namely: 8% bad product, which means thatproducts can not be used or should be recycled and 24% Melting modification products with themost common defect is "leaking" and "hole" that means products get special treatment becauseof a disability but can still be addressed.This is very detrimental to the company due toincreased production costs and production time is longer. This study aims to analyze thedirection of the metal freezing that occurs in low pressure die casting process on the faucet andmake product design duct system for low pressure die casting product faucets to reduceleakage due to defective hole. The method used by the finite element method (FEM).Observation of low pressure die casting process for product faucets, making the design of theduct system already owned PT.X using solidwork 2010 and simulate with ProCast v2008. Thesimulation results were observed in order to know the location of the defect and create newdesigns in order to obtain maximum results. The simulation results are observed there are areasexperiencing premature solidification so as to produce a hole and shaft. Addition chill onchannel system be the perfect solution to minimize defects and porosity existing hole. Areas experiencing premature solidification incur lower temperature of molten brass metal so that thearea freezes faster and directional freezing occurs.Keywords: Casting, LPDC, hole, shaft, premature solidification, freezing.
Studi Struktur mikro Silikon dalam Paduan Aluminium-Silikon pada Piston dari Berbagai Merek Sepeda Motor Tjokorda Gde Tirta Nindhia
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

This research introduce microstructure of silicon in aluminium-silicon alloys that were collected from varietymanufacture company that available in Indonesia such as Vespa, Suzuki, Kawasaki, Honda, and Yamaha. The microstructureobservation was conducted followed standard metallurgy test for aluminium. The result is presented in the form of metallographicfrom each specimen followed by literature study to obtain information regarding process and its properties related withapplication as a piston. It is revealed from this observation that the microstructure of silicon was found vary depend on whichcompany it’s coming from. The primarily differences were found from the silicon size and the texture. These differences makeeach piston having its own characteristic and properties that make it different one another related to wear resistance
Optimization of Initial Folding Square Sections for the Crashworthiness Design M Yoggaraj Muthusamy; Kamaruddin Kamaruddin; Moch. Agus Choiron
Jurnal Energi Dan Manufaktur Vol 11 No 1 (2018): Published in April 2018
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.808 KB) | DOI: 10.24843/JEM.2018.v11.i01.p06

Abstract

In this study, crash behavior of optimization of initial folding square sections are evaluated. Three parameters of design are set as width (w), height (h) and thickness (t) with three levels. Deformation mode of crash box and energy absorbing due to frontal load is observed. Response surface method is used to optimize the Initial folding square sections. Box-Bhenken is chosen to provide this setting and 13 models is built. Computer simulation is used to determine the energy absorption by using Software Finite Element Analysis. Based on computer simulation results, it can be denoted that w =1.1 mm, h = 0.9 mm and t = 2.75 mm produce the highest of energy absorption.
Pengaruh Temperatur Aniling Material Mgalti Terhadap Media Penyimpan Hidrogen Sabtun Ismi Khasanah; Nandha Riveri Sesunan
Jurnal Energi Dan Manufaktur Vol 12 No 2 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (469.014 KB) | DOI: 10.24843/JEM.2019.v12.i02.p07

Abstract

Hidrogen merupakan salah satu sumber energi alternatif di masa depan. Penyimpanan Hidrogen dalam bentuk solid state memiliki keunggulan daripada penyimpanan dalam bentuk gas dan cair. Penelitian ini dilakukan untuk mempelajari pengaruh material MgAlTi dan temperatur aniling material (MgAlTi) hasil preparasi reactive mechanical alloying (RMA) terhadap sifat media penyimpan hidrogen. Penambahan paduan logam Al dan Ti pada paduan logam Mg dilakukan untuk memperbaiki sifat serapan Mg. Penelitian dilakukan dengan memadukan material Mg, Al dan Ti dengan komposisi berat berturut-turut 85, 15 dan 5 %. Ketiga logam dipadukan dengan teknik RMA. Persiapan pemaduan dilakukan dalam glove box yang dialiri gas argon untuk memastikan pengerjaan teknik RMA dalam keadaan inert. Pemaduan teknik RMA dilakukan selama 10 jam dengan dialiri gas Hidrogen. Selanjutnya, paduan Mg85Al15+Ti5 di anil dengan variasi temperatur pemanasan 300; 340; dan 380 °C. Karakterisasi struktur kristal, mikro dan termal uji diobservasi dengan menggunakan X-Ray Difraction, SEM-EDX dan Differential Scanning Calorimetry (DSC). Hasil analisis struktur kristal dan mikro sesudah di aniling menjadi homogen dan hasil ini menunjukkan bahwa temperatur optimum material penyimpan hidrogen terjadi pada temperatur 300 °C. Aktifitas katalis terhadap disosiasi ikatan Mg-H2 dapat menentukan penurunan temperatur desorpsi dibandingkan pengaruh temperatur aniling. Pemaduan teknik RMA pada paduan logam MgAlTi dapat meningkatkan sifat-sifat penyimpanan hidrogen. Hydrogen is an alternative energy source and it has advantages to storage the element in form of solid state compare gas and liquid. The study was conducted to analyse the effect of MgAlTi in aniling temperature used reactive mechanical alloying (RMA) for hydrogen storage. The experimental was carried out to improve the absorption Mg by combination of Mg, Al and Ti materials with 85, 15 and 5% weight composition. The preparation is carried out in the glove box which is flowed with argon gas to ensure the work of the RMA technique in an inert state. The RMA techniques is carried out for 10 hours with Hydrogen gas flowing. Thus, the Mg85Al15 + Ti5 alloy is annealed with a heating temperature variation of 300; 340; and 380 °C. Characterization of crystal structure, micro and thermal tests were observed using X-Ray Difraction, SEM-EDX and Differential Scanning Calorimetry (DSC). The results of analysis of the crystal and micro structures after aniling become homogeneous and this shows that the optimum temperature of the hydrogen storage material occurs at a temperature of 300 °C. Moreover, the catalyst activity against dissociation of Mg-H2 bonds can determine the decrease in desorption temperature compared to the effect of aniling temperature. The integration of RMA techniques in MgAlTi metal alloys can improve hydrogen storage.
Influence of Fixed Temperature of Chilled Water Outlet Setting toward Performance of Chiller Absorbtion with Two Level Heating Cycle Method I Gusti Agung Bagus Wirajati; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 3, No.1 April 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The study investigated the performance of re-heat two stage cycle. This paper presents the working principle and theexperimental results of the reheat two stage adsorption cycle. The performance of the cycle was evaluated under differentheat source temperature and mass recovery time. Coefficient of performance (COP) and cooling capacity have beencalculated to analyze the influences of experimental conditions. The experimental results shown in both COP and coolingcapacity increased along with heat source temperature increased, and mass recovery time is very effective to improve theperformance without increasing heat source temperature.
Aplikasi PCM Bees Wax sebagai teknologi penyimpan energi (thermal energy storage) pada pemanas air domestik Adi Winarta; Muhammad Amin; Nandy Putra
Jurnal Energi Dan Manufaktur Vol 8 No 2 (2015): Oktober 2015
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Sistem pemanas air merupakan salah satu pengguna energi terbesar pada industri perhotelan selain pengkondisian udara dan penerangan. Temperatur air yang dihasilkan pada sistem pemanas air domestik biasanya berkisar antara 55-65°C. Phase Change Material (PCM) sebagai salah satu teknologi thermal storage dapat dimanfaatkan untuk meningkatkan efisiensi penggunaan energi listrik pada sistem pemanas air. PCM memanfaatkan kalor laten untuk menyimpan energi dan melepaskannya pada kondisi yang diinginkan. Pada penelitian ini diuji sebuah sistem pemanas air domestik dengan volume air sebesar 100 liter. Sumber kalor pada pemanas ini menggunakan heater listrik dengan daya total 3000 Watt. Sejumlah PCM diletakkan didalam drum pemanas air sebagai thermal storage dengan tujuan mempertahankan temperatur air pada suhu 60C sehingga penggunaan listrik oleh heater dapat dikurangi. Material PCM menggunakan bahan organik lilin lebah atau bees wax yang memiliki titik leleh 52°C-66°C. Bees wax ditempatkan pada kontainer yang terbuat dari pipa tembaga dengan diameter dalam 38,1 milimeter dan panjang 260 mm. Pengujian dilakukan dengan menguji tiga variasi massa PCM yakni 1,9 kg, 5,1 kg, dan 7,3 kg. Hasil pengujian menyatakan bahwa penggunaan PCM 1,9 kg memiliki waktu penundaan heater yang paling lama yakni 1 jam 6 menit 40 detik. Penggunaan PCM masih memiliki penggunaan daya yang lebih besar dibandingkan tanpa PCM yakni 12,93 kJ pada masa PCM 1,9 kg, 13,88 kJ pada 5,1 kg PCM dan 14,803 kJ pada 7,3 kg masa PCM. Kata kunci: Phase Change Material (PCM), Beewax, Domestic Water Heater.Abstract:Water heating system is one of the largest energy users in the hospitality industry, in addition to the air conditioning and lighting. The temperature of water which is produced on the domestic water heating systems typically range between 55-65°C. Phase Change Material (PCM) as one of the thermal storage technology can be utilized to improve the efficiency of energy use in water heating systems. PCM utilizes latent heat to store energy and release it at the desired conditions.This study tested a domestic water heating system with 100 liters water volume. The heat source in heating is using an electric heater with a total power of 3000 Watts. A number of PCM is placed inside the water heater drum as a thermal storage to maintaining the temperature of the water keep at 60°C, so that the use of electricity by the heater can be reduced. PCM material using organic materials such as bees wax which has a melting point of 52°C - 66°C. Bees wax is placed in containers made of copper pipe with an inner diameter of 38.1 millimeters and a length of 260 mm. Testing is done by testing five variations of the PCM mass 1,9 kg, 5,1 kg, and 7,3 kg. The test results stated, with the latent heat 0,242 kJ/g bees wax is capable to maintaining the temperature of water at 65°C for 116.6 minutes. Keywords: Phase Change Material (PCM), Bees Wax, Pemanas air domestic Keywords : Phase Change Material (PCM), Bees Wax, Pemanas air domestic
Potensi bambu swat (gigantochloa verticillata) sebagai material karbon aktif untuk adsorbed natural gas (ANG) Dewa Ngakan Ketut Putra Negara; Tjokorda Gde Tirta Nindhia; I Wayan Surata; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 9 No 2 (2016): Oktober 2016
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Bambu merupakan material biomassa yang banyak diteliti, diproduksi sebagai karbon aktif dan diaplikasikan di berbagaibidang kehidupan. Namun sangat sedikit bahkan hampir tidak ditemukan referensi yang membahas kegunaan karbonaktif dari bambusebagai adsorbent untuk Adsorbed Natural Gas (ANG). Penelitian ini difokuskan untukmengkarakterisasai dan menevaluasi potensi bambu swat (Gigantochloa verticillata) sebagai material dasar karbon aktifuntuk aplikasi ANG. Pengujian yang dilakukan meliputi uji proximate, uji ultimate, uji komposisi kimia dan pengamatanstruktur mikro. Hasil penelitian menunjukkan bahwa bambuswat memiliki kandungan lignin 22,9920%, selulosa44,2247%, volatile 88’32%, carbon 43,42%,ash 1,83%, silica (1,8664%) dan nitrogen 1,7065%. Bambu swat memilikiikatan pembuluh yang terdiri atas satu ikatan pembuluh (xilem dan floem) dan dua ikatan serat yang terletak di sebelahdalam dan luar dari ikatan pembuluh.Secara umum dapat dikatakan bahwa bamboo jenis ini memiliki kandungansellulosa, volatile dan karbon yang cukup tinggi serta ash, silica, hydrogen dan nitrogen yang rendah sehinggabambuswat sangat berpotensi digunakan sebagai material sumber karbon aktif.Kata kunci: Karbon aktif, bambu swat, ANG, lignin, sellulosa, analisa ultimate dan proximatesAbstract:Bamboo is a biomass material widely researched, produced as activated carbon and applied in various life fields.However, very little or almost no references were found with regard to utilization of bamboo activated carbon asadsorbent for Adsorbed Natural Gas (ANG). This study is concerned to characterize and evaluate potency of bambooswat (Gigantochloa verticillata) as aprecursor of activated carbon for ANG application. Examinations conducted wereproximate, ultimate, chemical composisition tests and microstructure observation. The results showed that bambooswathave a lignin content 22.9920%, cellulose 44.2247%, volatile 88.32%, carbon 43.42%, ash 1.83%, silica 1.8664% andnitrogen 1.7065%. The type of bamboo swat vascular bundles consist of a single bond vessels (xylem and phloem) andtwo ligament fibers are located on the inside and outside of the vascular bundles.Generally, it can be said this type ofbamboo has high contents of cellulose, volatile and carbon and low contens of ash, silica and nitrogen so that it hasgreat potential as a source of activated carbon..Keywords: Activated carbon, bamboo swat, ANG, lignin, cellulosa, ultimate and proximate analysis

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