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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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Pengaruh Karbon Aktif Komposit Hibrida pada Absorpsi Air Permukaan Daniel Lihoudo Williams; I.D.G Ary Subagia; AAIA Sri Komaladewi
Jurnal Energi Dan Manufaktur Vol 12 No 1 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.545 KB) | DOI: 10.24843/JEM.2019.v12.i01.p09

Abstract

Penelitian ini bertujuan mengetahui unjuk kerja komposit hibrida dalam proses adsorpsi air permukaan. Komposit hibrida merupakan bahan yang terdiri dari morninga olifera (MO) dan activated carbon (AC) sebagai fillers, dan tepung lengket sebagai polimer yang diproduksi menggunakan cetakan penekanan panas (hot-press mold) pada temperatur 200°C. Komposisi filler dan polimer didasarkan pada rasio fraksi berat yaitu 40% filler dan 60% polimer. Kualitas absorpsi komposit hibrida dilakukan melalui proses perendaman dan turbidity test. Hasil pengujian perendaman benda kerja selama dua minggu adalah waktu paling optimal dari kenaikan massa komposit hibrida yang direndam pada air permukaan untuk masing-masing variasi hibrida. Peningkatan jumlah prosentase AC pada benda uji meningkatkan kekeruhan air karena adanya pelepasan unsur C pada air sesuai dengan test turbiditasnya. Kemudian, kandungan coliform dan E-coli pada air permukaan menurun disebabkan oleh meningkatnya prosentase MO pada benda uji. Dari hasil tersebut, disimpulkan bahwa hibridisasi filler MO dan AC memberikan dampak positif terhadap kualitas air permukaan.
Rancang bangun mesin penyangrai kacang tanah pada Industri Mochi di Sukabumi Silvi Ariyanti; Chandrasah Soekardi; Resa Taruna Suhada; Wildan Yoga Pratama
Jurnal Energi Dan Manufaktur Vol 10 No 2 (2017): Oktober 2017
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.513 KB)

Abstract

Abstrak Banyaknya penggunaan kacang tanah yang disangrai untuk diolah menjadi Tingting Gepuk sebagai isi dari kue Mochi sehingga kacang tanah merupakan bahan utama kedua yang banyak digunakan dalam produksi kue Mochi selain dari tepung ketan. Dalam proses pembuatan Titing Gepuk kacang tanah harus disangrai selama 30 menit dengan kapasitas penyangraian 20 Kg/jam. Proses penyangraian kacang tanah dilakukan dengan menggunakan dua buah kuali dan dua buah kompor. Selama proses penyangraian kacang harus terus diaduk tanpa henti oleh satu orang tenaga kerja dengan menggunakan kedua tangannya kanan dan kiri. Hal ini dilakukan karena apabila pekerja berhenti mengaduk karena kelelahan maka kacang akan hangus. Adapun tujuan dari penelitian ini adalah bagaimana rancang bangun dan pembuatan mesin penyangraian kacang tanah dengan kapasitas 2 kg/proses untuk menunjang produksi kue Mochi di Sukabumi. Berdasarkan persyaratan teknologi tepat guna bagi industri kecil, antara lain: biaya operasinya terjangkau oleh industri kecil; bentuknya menarik, ergonomis, sederhana; mudah dioperasikan, dirawat, dan aman, dapat meningkatkan mutu produk, dapat mengurangi kelelahan dari pekerja. Metode perancangan yang digunakan dalam penelitian ini terdiri dari perencanaan, pengembangan konsep dan perancangan detail. Dan hari hasil penelitian ini telah dihasilkan disain mesin penyangaraian kacang tanah yang dapat mengurangkan beban kerja pada pekerja penyangraian, pengurangan hawa yang disebabkan oleh proses penyangraian, meningkatkan produktivitas yang disebabkan banyaknya kacang yang hangus, kacang yang dihasilkan dari proses penyangraian yang dihasilkan telah bersih dari dari kulit ari. Kata kunci: Penyangrai, kacang tanah, ergonomis Abstract The amount of use of peanuts roasted to extract the contents of Tingting Gepuk as mochi cake so that the peanut is the main ingredient is widely used both in the production of Mochi Cake apart from glutinous rice flour. In the manufacturing process Titing Gepuk should roasted peanuts for 30 minutes with a roasting capacity of 20 Kg/hour. Peanut roasting process is done by using two cauldron and two stoves. During the roasting process the beans should be kept stirred without stopping by the workers using the right and left hands. This is done because if the workers quit because of fatigue then stirring the beans will be forfeited. The purpose of this study is how to design and manufacture wake peanut roasting machine with a capacity of 2 kg/processes to support the production of mochi cake in Sukabumi. Based on the requirements of appropriate technology for small industries, among others: the cost affordable by small industrial operations; interesting shapes, ergonomic, simple; easy to operate, maintain, and secure, can improve product quality, reduce fatigue of workers. The design method used in this study consisted of planning, concept development and design detail. And the results of this study have been generated design of the machine roasting peanuts can reduce the workload on the workers roasting, reduction of air that is caused by the process of roasting, increase productivity because of too many beans were charred, beans produced from the roasting produced are cleaner than of epidermis bean. Keywords: Roasters, peanut, ergonomic
Welding Connection Strenght of Aluminium 1100 with Current Variations at Metal Inert Gas (MIG) Welding Process I Dewa Made Krishna Muku
Jurnal Energi Dan Manufaktur Vol 3, No.1 April 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.328 KB)

Abstract

In order to design of machine or building constructions use of welding connection, there are many factors should beconsidered such as skill, knowledge about welding procedures and material characteristics. One parameter of weldingprocedures influencing mechanical characteristic of weld metal is welding current. In this study, strength of aluminium 1100welding connection due to electric current variations at metal inert gas welding process was investigated. Spesimen to beused was standard ASTM E 8. Electric current variations to be set were 150 A, 165 A, 180 A, 195 A and 210 A, with constanvoltage and welding speed were 24 V and 25 inchi/minutes respectivelly. Collected data were evaluated use of analysis ofvariance and regresion analysis.The results of investigation show that; electric current has a significant effect towardstrength of aluminium 1100 welding junction; the characteristic trend to represent relationship between electric current andstrength of aluminium 1100 welding junction is polynomial orde 2; the highest strength of aluminium 1100 welding junctionwas obtained by use of electric current 180 A there was 11,900 kgf/mm2.
Studi eksperimental sistem pengering biji jagung dengan metode natural convection untuk peningkatan kualitas produksi pertanian di Gorontalo Evi Sunarti Antu
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.945 KB)

Abstract

Abstrak:Untuk mendapatkan standar SNI 01-03920-1995 kadar air untuk jagung adalah 13-14%, jagung harus melewati prosespengeringan. Masyarakat Gorontalo dalam pengeringan masih menggunakan cara konvensional yakni denganmenjemur dibawah terik matahari langsung sehingga berpengaruh pada laju pengeringan. Salah satu metodepengeringan buatan yang telah dikembangkan antara lain adalah alat pengering dengan metode surya kolektor.Kolektor surya yang dirancang dan digunakan dalam penelitian ini adalah kolektor surya hybrid dengan absorber senggelombang, divariasikan dengan dua sudut kolektor. Kedua sudut kolektor yakni 75o dan 45o. Kadar air jagung awalsebelum penelitian adalah 20,7% dengan penjemuran konvensional kadar air dalam sehari menurun hingga 18%,sedangkan dengan menggunakan alat kolektor surya pada variasi sudut 45o kadar airnya menurun hingga 15,01% Lajupenguapan (Qe) sebesar 2758,011 watt.Kata kunci: Kadar air, jagung, kolektor surya, sudut
Studi Eksperimental Pengaruh Bilangan Reynolds pada Keefektifan dan Koefisien Tekanan Penukar Panas Berkas Pipa Eliptik Susunan Berseling Budi Utomo Kukuh Widodo; Samsul Kamal; Suhanan .; I Made Suardjaja
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.63 KB)

Abstract

Experimental studies have been conducted on the elliptic tube bundle with a diameter equivalent to 0.75inches and the aspect ratio (AR) = 2.Tube bundle arranged alternate with 4-3-4 configuration and pitchlateral (SL) = 1.5 X axis major axis. Meanwhile pitch transverse (ST) varied 1.5 and 2 X minor axis. TheTesting was carried out in a subsonic wind tunnel with wind speeds of 1 m / s - 12.6 m / s resultingReynolds number Reb = 346-6904 and operating temperature 49 oC, 59 oC and 69 oC. Seven tubesinserted an electric heater produces uniform heat flux 3718 W/m2 - 3751 W/m2. The results show that theeffectiveness of the heat exchanger (Q / P) varied from 3799 to 15, decreases exponentially at lowReynolds number and tends to asymptotic at Reynolds number above 1000. Meanwhile, the valuepressure coefficient (?p/0.5?V2) with value 3.4-10 decreased continuously at low Reynolds numbers andasymptotic at high Reynolds number. In general, a bundle with a smaller ST has greater effectiveness andthe pressure coefficient ranges is wider. Changes in operating temperature conseqwenly no effect on theeffectiveness and the pressure coefficient at high Reynolds number.
Komposit poliester/serat gelas: pengaruh jumlah lapisan serat terhadap sifat mekaniknya NPG Suardana; IW Surata
Jurnal Energi Dan Manufaktur Vol 2, No.1 Juni 2007
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (22.574 KB)

Abstract

Technology of polymers and composites progressively expand which had been found of various new composite types with excellence and also it’s excess. Currently, one of the composite materials was used in many industrial of automotive as vehicle body especially for components that needed light material with high strength and high corrosive resistance is Glass Fiber Reinforced Polymer (GFRP). This research investigated whether the addition of fiber layer can increase flexural strength of the composite, and how many the maximum fiber layer or maximum fiber fraction of weight. The experiment used unsaturated polyester Resin type of Yukalac 157 BQTN-EX as matrix, short glass fiber sheet with random orientation (chopped random mat) type of MAT 300 as reinforcement, and methyl etil keton peroxide (MEKPO) as hardener, respectively. The specimens were made by press hand lay-up and then formed and underwent the flexural testing according to standard of ASTM D 790 - 03. From the result and data analysis, it can be concluded that the weight fraction and fiber volume fraction increased with fiber layer. These resulted in the increase of flexural modulus and strength of GFRP. The specific strength and specific flexural modulus had relatively constant value, because the increase of flexural strength will be followed by increased its density. The number of maximum fiber layer in 1 mmcomposite in thickness was 3 layers (MAT 300), which approached the maximum fiber fraction of weight (Wf = 58.69%, 60% maximum).
Studi Perencanaan Atap Panel Surya di Hotel The Royale Krakatau Cilegon Zawahar Islamy; Agung Sudrajad
Jurnal Energi Dan Manufaktur Vol 7 No 2 (2014): Oktober 2014
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (158.368 KB)

Abstract

Hotel The Royale Krakatau adalah salah satu hotel terbaik di Provinsi Banten yangmerupakan daerah yang beriklim tropis dan kaya akan pancaran cahaya matahari. Saat inihotel belum memanfaatkan sumber energi terbarukan alam sebagai salah satu sumberenergi pendukung di hotel. Studi ini merupakan studi kajian perencanaan pemasanganpanel surya yang diletakkan di atap bangunan hotel dengan luasan sekitar 400 m2 dengandesain mengikuti bentuk atap. Atap yang direncanakan dipasang panel surya, saat ini belumdimanfaatkan secara optimal dan hanya merupakan aksesoris bagi bangunan hotel. Dayayang dihasilkan dari pemasangan panel surya direncanakan akan mensubstitusi kebutuhansebagian energi listrik di hotel seperti penerangan lampu-lampu. Metode yang digunakanadalah metode observasi dan perhitungan empiris menyangkut daya output dan luasanpanel surya. Dari studi perencanaan yang dilakukan, daya output yang dihasilkan olehpemasangan panel surya adalah 10% dari kebutuhan total energi listrik di hotel.Kata kunci: Panel Surya, Energi Terbarukan, Hotel The Royale Krakatau CilegonHotel The Royale Krakatau is one of the best hotels in Banten Province which is a tropicalarea and rich in the light of the sun. Currently the hotel has not utilizing natural renewableenergy sources as one of the supporting energy source at the hotel. This study is the studyof planning the installation of solar panels placed on the roof of the hotel building with anarea of about 400 m2 with the design follows the shape of the roof. The planned roofmounted solar panels, currently not used optimally and is only an accessory to the hotelbuilding. The power generated from the solar panel installation is planned to substitute theelectric energy needs of the hotel such as lighting lamps. The method used are observationand empirical calculations regarding output power and extent of solar panels. From planningstudies conducted, the output power generated by the solar panel installation is 10% of thetotal electric energy needs at the hotel.Keywords: Solar Panels, Renewable Energy, Hotel The Royale Krakatau Cilegon
Pengujian Karakteristik Fisika Biogasoline Sebagai Bahan Bakar Alternatif Pengganti Bensin Murni I Gede Wiratmaja
Jurnal Energi Dan Manufaktur Vol 4, No.2 Oktober 2010
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.845 KB)

Abstract

Scarcity of fuel, especially gasoline has become a major issue in recent years, so that the search should be conducted ofalternative fuels, one of them is to use a mixture biogasoline of pure gasoline and alcohol with a specific ratio, it is due to biofuels(alcohol ) can not stand alone as a pure substitute for conventional fuels. For that here the author makes biogasoline a mixture ofgasoline and alcohol 95% in the 3 comparisons (90:10), (85:15), (80:20) for gasoline and alcohol. Further testing physicalcharacteristics, which include testing density, fuel viscosity, specific gravity, flash point, gas point, and calorific value todetermine eligibility level as a fuel substitute for gasoline.Test results obtained from physical characteristics with a ratio biogasoline gasoline - alcohol (90:10), was most likelyphysical characteristics of gasoline. And the whole mixture of gasoline and alcohol is in the range of tolerance characteristicproperties of gasoline. Be known so that the maximum tolerance alcohol content in gasoline, in order to fit for use in gasolineengines without any modification. And with the addition of biogasoline making alcohol content exceeds the tolerance on thegasoline into the engine must be modified, so that later can be seen further performance.
Influence of Electric Current and Hard Anodizing Process Time of Aluminium toward Hardness and Layer Thickness I Gst. Ngr. Nitya Santhiarsa
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1224.503 KB)

Abstract

Influence of Electric Current and Hard Anodizing Process Time of Aluminium toward Hardness and Layer Thickness
Transkripsi Musik Gong Timor Menggunakan Continous Wavelet Transform (CWT) Yovinia C H Siki; Yoyon K Suprapto
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.476 KB)

Abstract

Abstrak:Transkripsi musik gong timor dibutuhkan untuk pengembangan aplikasi pengolahan sinyal musik seperti mengeditmusik, melacak tempo musik dan analisis sinyal musik lainnya yang dapat membantu para pemain pemula untukbelajar bagaimana memainkan alat musik gong. Rumitnya analisa suara musik gong dibandingkan analisa peralatanmusik barat karena dipengaruhi oleh cara pembuatan peralatan yang kurang sempurna, dan cara pemukulan peralatanyang berdasar kira-kira. Dengan menggunakan metode CWT, sinyal music gong dikonvolusi untuk menghasilkanscalogram music gong domain skala dan frekuensi. Estimasi nada gong diperoleh menggunakan sebuah proses notegenerating. Keberhasilan transkripsi ditentukan dengan menghitung error yaitu ketepatan menterjemah. Dimana adanada yang seharusnya tidak ada tetapi dikenali sebagai note (insertion), ada nada yang tidak dikenali sehinggaterhapus (deletion) dan ada nada yang dikenali salah (substitution).Kata kunci: Gong timor, transkripsi musik, CWT, scalogram, note generatingAbstract:Gong timor music transcription used to develop some other aplication in music signal processing such as music editing,beat detection, etc. With this transcription, new percussionist of gong can learn more easily to playing gong instrument.Analyzing music gong are more difficult than any other music instrument, it is because gong instrument created withvery simple tools and the percussionist playing this instrument by feelings of any other instrument in gamelan. Musicgong signal convoluted using CWT to create scalogram of music gong in scale and frequency domain. Tone estimationobtained using a note generating process. The success of transcription process determined by calculating errors intranscription results. Which are sometimes there is a tone that shouldn’t exist but marked as a tone (insertion), or thereis a tone but the transcription process doesn’t recognize it (deletion) and sometimes there is a tone but marked as adifferent tone (substitution).Keywords: Gong timor, music transcription, CWT, scalogram, note generating

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