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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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Katalisator Cangkang Keong Mas Terhadap Sifat Mekanik Baja ST42 Melalui Proses Kaburasi Abdul Hay; Arief Darmawa
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Penelitian ini bertujuan untuk mengetahui perbedaan nilai kekerasan pada material (baja st 42) yang dikarburasi denganmenggunakan katalisator cangkang keong mas (10%, 20%, 30%, 40%, 50%). Bahan yang digunakan dalam penelitianini adalah baja karbon rendah (baja st 42). Bahan berbentuk silinder pejal dengan diameter 20 mm dan panjang 10 mm.Proses carburizing menggunakan media arang kayu jati dan cangkang keong mas (kalsium karbonat) denganpresentase campuran yang berbeda-beda yang dipanaskan pada suhu 950 oC dengan waktu penahanan selama1 jamdengan media pendingin air. Kemudian dilakukan pengujian kekerasan Rockwell B dengan beban100 kg (981 N),pengujian laju keausan dengan metode menggesekkan benda uji terhadap permukaan amplas. Hasil penelitianmenunjukkan nilai kekerasan secara berurutan dari nilai kekerasan yang paling tinggi adalah: material denganpresentase 60% karbon kayu jati dengan 40% serbuk CaCO3, material dengan presentase 70% karbon kayu jati dengan30% CaCO3, material dengan presentase 80% karbon kayu jati dengan 20% CaCO3, material dengan presentase 90%karbon kayu jati dengan 10%.Penelitian ini dapat disimpulkan bahwa proses pengerasan dengan presentase 60%karbon kayu jati dan 40% CaCO3 didapatkan nilai kekerasan yang paling tinggi.Kata kunci: Baja karbon rendah (st 42), carburizing, katalisator (cangkang keong mas), suhu, kekerasan, laju keausanAbstract:This study aims to determine the difference of steel ST 42 hardness which is carburized by using a catalyst shell snails(10%, 20%, 30%, 40%, 50%). Specimens are made in form of solid cylindrical shape with a diameter of 20 mm and alength of 10 mm. Carburizing process is undertaken by using teak wood charcoal media and snails shells (calciumcarbonate) with a different percentage of mixture heated at a temperature of 950 oC, socked at the temperature duringone hour and then quenched in the water. The hardness of specimens are tested by Rockwell hardness B with load of100 kg (981 N), meanwhile, the wear rate testing is carried out by moving of specimens against the surface ofsandpaper. The results showed a hardness value in a sequence of values hardness from the highest are: a materialwith a percentage of 60% carbon teak with 40% powder CaCO3, material with a percentage of 70% carbon teak with30% CaCO3, material with a percentage of 80% carbon teak with 20% CaCO3, material with a percentage of 90%carbon teak with 10%. It can be concluded that the hardening process with a percentage of 60% carbon teak and 40%CaCO3 obtained the highest hardness value.Keywords: Low carbon steels (st 42), carburizing, catalyst (shell snails), temperature, hardness, wear rate
Pengaruh penggunaan modifikasi DIS Tipe 2 terhadap gas buang kendaraan I GNP Tenaya; I Gusti Ketut Sukadana
Jurnal Energi Dan Manufaktur Vol 10 No 1 (2017): April 2017
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak Sistem pengapian adalah salah satu faktor yang mempengaruhi proses pembakaran didalam mesin. Gas buang adalah salah satu indikator untuk mengetahui proses pembakaran dan performa mesin. Pengapian dengan modifikasi DIS tipe 2 sistemnya adalah setiap silinder ditangani dengan satu koil pengapian dan tidak menggunakan kabel tegangan tinggi serta titik persambungan yang dapat mengurangi energi pengapian pada area tegangan tinggi. Untuk membuktikan kebenarannya terhadap proses pembakaran maka dilakukan penelitian pengaruh penggunaan modifikasi DIS tipe 2 terhadap gas buang kendaraan. Dalam penelitian ini digunakan kendaraan 1300 cc. Pada putaran 800 rpm sampai 3300 rpm yang menggunakan DIS tipe 2 dan modifikasi DIS tipe 2. Data yang diamati adalah kadar CO, CO2, HC dan O2.Dari hasil penelitian didapatkan pengapian dengan menggunakan modifikasi DIS tipe 2 kadar gas buang CO dan HC lebih rendah sedangkan kadar gas buang O2 dan CO2lebih tinggi jika dibandingkan dengan pengapian menggunakanDIS tipe 2. Kata kunci: DIS Tipe 2, Modifikasi, Gas Buang Abstract The ignition system is a factor which influence the combustion process of engine. Exhaust gas is one indicator to know about a combustion and engine performance. The modification ignition of DIS type 2 system is each cylinder handlled using an ignition coil and it is without the high tenssion cord and also splace points which can be ignition energy decrease in high voltage area. To approve that truth about the combustion process is done by research for the effect of modification DIS type 2 toward vehicle exhaust gas.This research use vehicle in 1300 cc. On the circle about 800 rpm until 3300 rpm which using DIS type 2 and DIS type 2 modification. The data by observed was degree of CO, CO2, HC and O2.From this research, that by DIS type 2 modification ignition, degree of CO and HC was decrease while degree of O2 and CO2 was increase if compare by DIS type 2 ignition. Keywords: DIS Type 2, Modification, Exhaust Gas
Identifikasi Unsur Utama Penyusun Permukaan Bahan Baja Ringan dengan Laser-Induced Breakdown Spectroscopy (LIBS) Hery Suyanto
Jurnal Energi Dan Manufaktur Vol 6 No 2 (2013): Oktober 2013
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

AbstrakIdentifikasi unsur utama penyusun permukaan bahan baja ringan telah dianalisis denganmenggunakan teknik laser-induced breakdown spectroscopy (LIBS). Identifikasi unsurdilakukan dengan pengambilan data setiap kedalaman 20 ?m hingga kedalaman 120 ?m daripermukaan yang mana disebut metode depth profile dengan meninjau homogenitas suatuunsur fungsi kedalaman. Data menunjukan ada tiga kelompok unsur penyusun permukaan(20–120 ?m) bahan baja ringan. Kelompok pertama, unsur Aluminium (Al) dan Zinc (Zn) yangmempunyai tingkat homogen tinggi sampai kedalaman 120 ?m dengan fluktuasi kurang dari 8% dan rata-rata konsentrasi masing-masing lebih besar dari 40,5%, sehingga unsur inimerupakan penyusun utama permukaan baja ringan. Kelompok kedua, unsur krom (Cr),Natrium (Na) dan kalsium (Ca) merupakan unsur penyusun dipermukaan hingga kedalaman 20?m dengan rata-rata konsentrasi masing-masing sebesar 3,9%. Kelompok ketiga yaitu unsurFe merupakan unsur penyusun baja ringan yang konsentrasinya meningkat denganbertambahnya kedalaman dan mulai homogen setelah kedalaman 100 ?m dengan rata-ratakonsentrasi sebesar 7.2 %.Kata kunci: Identifikasi unsur, baja ringan, LIBS, depth profile, homogenitas.AbstractThe identification of the main elements in the surface of steel was conducted by applying depthprofile method using Laser-Induced Breakdown spectroscopy (LIBS). The investigation basedon the homogenous of the elements as a function of the depth started from the surface till 120?m. The data show that there are three groups of the elements constructed in the surface ofsteel. The first group, alumina (Al) and Zinc (Zn), is host elements in the surface till 120 ?mwith a concentration more than 40.5 % of each and fluctuation is less than 8 %. The nextgroup, chromium (Cr), sodium (Na) and calcium (Ca) elements, is in the surface of steel till 20?m with average concentration of each is 3.9 %. The last group is iron (Fe) element where itsconcentration rises with the increasing of the depth till 100 ?m and its average concentration isabout 7.2 %.Keywords: Surface analysis, LIBS, depth profile, homogeneous.
Variasi berat roller sentrifugal Pada continuosly variable transmission (CTV) terhadap kinerja traksi sepeda motor Made Dwi Budiana P.; I Ketut Adi Atmika; IDG. Ary Subagia
Jurnal Energi Dan Manufaktur Vol 3, No.2 Desember 2008
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The automotive technology especially motorcycle has been innovated to improve the handling stability and comfortably. The developing of motorcycle technology has applied automatic transmission system. The automatic transmission has systems which need acceleration handling and break control. From this concept has been done to develop automatic transmission system according to variable which said Continuously Variable Transmission (CVT) system.The purpose of this experiment is to know effect weight of roller centrifugal in speed governor to traction performance. The analysis traction performance executed matchematic model with motorcycle Nouvo, 115 cc 4 strokes as vehicle model. Parameter input of this calculation include: vehicle speed (V = 0-30 km/h, V = 40-70 km/h, dan V = 80-90 km/h), engine torque, and vehicle dynamic model behavior. For get the answer, the expriment executed with simulation mode and then appealed with expriment on straightaway level.The obtained result on simulation and expriment : for roller centrifugal with 8 gr weight will gave the maximum traction performance on low speed until the acceleration on low speed is faster than the roller centrifugal 10.2 gr or 12 gr. However the roller centrifugal with 12 gr weight will gave the highest traction performance on the high speed until the vehicle easy to faster in high speed, and for roller centrifugal 10.2 gr weight (standard) have traction performance between roller centrifugal 8 gr and 12 gr. So, the roller 8 gr give the best performance traction, because at a low speed is required high acceleration.
Kekuatan Lentur Komposit Polyester Berpenguat Serat Tapis Kelapa I Made Astika; I Gusti Komang Dwijana
Jurnal Energi Dan Manufaktur Vol 8 No 1 (2015): April 2015
Publisher : Department of Mechanical Engineering, University of Udayana

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Penelitian ini bertujuan untuk menyelidiki sifat mekanis yaitu kekuatan lentur dari kompositpolyester yang diperkuat dengan serat tapis kelapa. Di masa depan komposit ini dapatdigunakan untuk menggantikan kayu, bambu dan gipsun yang harganya mahal dan tidaktahan air. Komposit dibuat dengan memanfaatkan serat sabut kelapa dan matriks resinUnsaturated-Polyester (UPRs) jenis Yucalac 157 BQTN, campuran 1% hardener jenis MEKPO(Methyl Ethyl Ketone Peroxide) dan perendaman serat dalam larutan alkali KMnO4 0,5%.Metode produksi yang digunakan adalah press hand lay up dengan orientasi serat acak.Desain komposit dengan variasi fraksi volume serat 20, 25 dan 30% dan variasi panjang serat5, 10 dan 15 mm. Hasil penelitian menunjukkan bahwa semakin besar fraksi volume danpanjang serat dalam komposit maka kekuatan lentur semakin tinggi. Mode patahan yangteramati adalah patah getas, debonding, pullout dan crack deflection.Kata kunci: komposit, serat tapis kelapa, kekuatan lentur, mode patahanThe purpose of this study is to investigate the mechanical properties i.e. flexural strength ofcomposites coconut filter fiber. In the future this material can be used to replace the wood,bamboo and gipsun which are high price and lower water resistance.The research material made with coconut filter fiber as reinforcement and matrix resinunsaturated polyester (UPRs) type Yukalac BQTN 157, with 1% hardener types MEKPO(Methyl Ethyl Ketone Peroxide) and fiber treatment by 0.5% KMnO4. Production methods arepress hand lay-up and the variations of fiber volume fraction are 20, 25 and 30% and fiberlength are 5, 10 and 15 mm. Testing of mechanical properties is flexural test (ASTM - D790)The results of research show that the longer of fiber and the bigger of fiber volume fraction,the higher of flexural strength are obtained. The fracture mode are overload, debonding ,pullout and crack deflectionKeywords : composites, coconut filter fiber, flexural strength, fracture mode
Desain dan analisa pisau penghancur bonggol jagung sebagai bahan pakan ternak Liza Rusdiyana; Suhariyanto Suhariyanto; Gathot Dwi Winarto; Syamsul Hadi; Mahirul Mursid
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Pakan ternak memegang peranan yang sangat penting dalam usaha peternakan karena harus mempunyai nilai giziyang tinggi.Pada Usaha Kecil Menengah (UKM) pembuatan pakan ternak di Kecamatan Jatirejo Kabupaten Mojokertoini dalam proses produksinya sudah menggunakan mesin, tetapi hasil bonggol jagung yang dihancurkan dari mesintersebut masih jauh dari sempurna. Oleh karena itu untuk mengatasi masalah ini adalah dengan merancang alatpenghancur bonggol jagung. Dengan menggunakan tujuh pisau penghancur dan desain peletakan pisau dibentukspiral. Material pisau penghancur yang digunakan yaitu Stainless Steeel Food Grade 304. Kemudian merencanakanporos, pasak, dan melakukan analisa dengan menggunakan software Ansys 12.1. Hasil dari perhitungan dan analisa,didapatkan daya yang dibutuhkan menghancurkanb onggol jagung untuk satu pisau yaitu 0,826 HP. Hasil analisa pisaumemiliki tegangan maksimum sebesar 5,408x105 N/m².Kata kunci: Bonggol jagung, baja tahan karat, AnsysAbstract:Animal feed plays a very important in the farm because it must have a high nutritional value. On Small and MediumEnterprises (SMEs) in the manufacture of animal feed Jatirejo District of Mojokerto regency is in the process ofproduction has been using the machine, but the results were crushed corncobs of these machines are still far fromperfect. Therefore, to overcome this problem is to design crusher corncobs. By using the seven-blade knife layingcrusher and formed spiral design. Materials used are knives crushers Food Grade Stainless steeel shaft 304. Thendesigning the shaft, pegs, and performs analysis using ANSYS 12.1 software. The results of calculation and analysisshowed the power needed to destroy corncob one knife is 0,826HP. The results of analysis of the knife has a maximumstress at 5,408 x 105 N/m².Keywords: Clevis corn, stainless steel, Ansys
Pengaruh Penggunaan Suction Liquid Heat Exchanger dan Tube in Tube Heat Exchanger Pada Refrigerator Terhadap Daya Kompresor dan Waktu Pendinginan Ega Taqwali Berman
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Penelitian ini bertujuan untuk membandingkan penggunaan SuctionLiquid Heat Exchanger (SLHX) danTube in Tube Heat Exchanger (TiTHX) pada refrigerator terhadap daya kompresor dan waktupendinginan. Data pengujian diukur pada temperatur beban pendinginan 60C sampai dengan temperatur -60C dan fluida kerja yang digunakan sebagai media pendingin adalah refrigeran 12. Hasil penelitiandiperoleh daya kompresor yang diperlukan oleh sistem refrigerasi yang menggunakan TiTHX 1,9 % lebihkecil daripada sistem refrigerasi yang menggunakan SLHX. Hal tersebut disebabkan oleh kerja kompresiyang dilakukan oleh sistem yang menggunakan TiTHX lebih kecil daripada sistem refrigerasi yangmenggunakan SLHX. Waktu pendinginan yang dibutuhkan untuk mencapai temperatur pengukuran padakondisi steady (60C) dan kondisi akhir (-60C) lebih singkat pada sistem yang menggunakan TiTHX daripadasistem yang menggunakan SLHX.
Unjuk kerja kolektor surya pelat datar dengan variasi ketinggian sirip (L/Lf) pada pelat absorber Amrizal -
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The main objective of this research is to know how far the influence of the addition of continuous longitudinal fins on enhancing the performance of solar collector. The addition of continuous longitudinal fins to the bottom side of the absorber plate using fin ratio (L/Lf) =2; 1.3; 1 increases the heat transfer and pressure drop. Optimization is done to get the optimum heat transfer and low difference of pressure drop. By experimental study, this present research shows that fin ratio ( L/Lf ) =1 is the optimum condition which give the average efficiency of 53 % and pressure drop of 2,97 N/m2. Comparing this result with fin ratio (L/Lf) =2 and 1.3 we can see the pressure drop has not increased significantly from 2.97 to 3.3 N/m2.
Mesin Pengasah Batu Permata M. Yusuf; Made Anom Santiana
Jurnal Energi Dan Manufaktur Vol 7 No 1 (2014): April 2014
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Proses akhir pengerjaan batu permata pada industri kecil kerajinan permata adalahpenghalusan. Biasanya proses ini dilakukan secara manual dengan sikap kerja duduk bersila dilantai sehingga menimbulkan banyak keluhan terutama keluhan pada otot lengan danpinggang. Di samping itu hasil produksinya juga kurang optimal. Mengatasi permasalahan inidan untukmeningkatkan produktivitas kerja perajin, dilakukan perbaikan dengan cara membuatmesin pengasah batu permata yang murah dan ergonomis. Penelitian awal dilakukan pada 16perajin permata dengan rancangan "treatment by subject design" dengan dua kelompok yaitukelompok Kontrol (mengasah permata secara manual menggunakan tangan dengan sikapkerja duduk bersila di lantai), dan kelompok Perlakuan (subjek diberikan perlakuan mengasahbatu permata menggunakan alat pengasah dengan sikap kerja duduk di kursi). Beban kerjadiprediksi dari denyut nadi kerja yang dihitung dengan metode 10 denyut. Sedangkanproduktivitas kerja dinilai dari jumlah produk yang dihasilkan per denyut nadi kerja rata-ratadalam satu jam. Data dianalisis dengan menggunakan uji independen t test pada tarafkemaknaan 5%. Hasil analisis menunjukkan bahwa terjadi perbedaan yang signifikan (p < 0,05)pada beban kerja dan produktivitas kerja antara kelompok Kontrol dan Perlakuan. Beban kerjapada kelompok Kontrol diperoleh sebesar 104,29 ± 4,65, dan pada kelompok Perlakuandiperoleh 88,64 ± 2,33 atau mengalami penurunan sebesar 15%. Sedangkan produktivitaskerja pada kelompok kontrol diperoleh 0,01002 ± 0,00042, dan pada kelompok Perlakuandiperoleh 0,05801 ± 0,00207 atau mengalami peningkatan sebesar 478,8%. Dari hasil analisisdapat disimpulkan bahwa mesin pengasah batu permata memberikan peningkatanproduktivitas kerja perajin permata. Oleh karena itu penggunaan mesin ini disarankan untukdipergunakan pada para perajin permata yang disetai perubahan sikap kerja dari duduk bersiladi lantai menjadi sikap kerja duduk secara alamiyah di kursi.Kata Kunci : Mesin pengasah batu permata, beban kerja, produktivitas kerjaPolishing is final processing of gemstones in small scale gems industries. Usually this processis done manually with the work attitude sitting cross-legged on the floor, causing a lot ofcomplaints, especially complaints on arm muscles and waist. In addition, production is also lessthan optimal results. To overcoming these problems and to increase labor productivity ofcraftsmen, then improvements is made to the way of making gemstone polishing machineinexpensive and ergonomic. Preliminary research conducted on 16 crafters gem with thedesign of "treatment by the subject design" with two groups: control (hone gem manually usinga hand with the work attitude sitting cross-legged on the floor), and the treatment group(subjects were given treatment using a gem stone sharpening tool sharpener with the workattitude sitting in a chair). Working pulse 10 beats calculated by the method prediction ofworkload of . While labor productivity assessed on the amount of product produced per pulseaverage working within one hour. Data were analyzed using independent t test test atsignificance level of 5%. The analysis showed that there was significant difference (p <0.05) onthe workload and productivity of labor between control and treatment groups. The workload onthe control group was obtained by 104.29 ± 4.65, and in the treatment group obtained 88.64 ±2.33 or decreased by 15%. Meanwhile, labor productivity in the control group gained 0.01002 ±0.00042, and the treatment group gained 0.05801 ± 0.00207, or an increase of 478.8%. Fromthe analysis it can be concluded that the gemstone sharpening machine providing increasedwork productivity jewel crafters. Therefore the use of this machine is recommended for use inthe jewel crafters accompanied by changes in working attitude of sitting cross-legged on thefloor into a work attitude around the globe sits on a chair.Keywords: Sharpener machine gemstones, work load, work productivity
Performansi Pengering Ikan Aliran Alami memanfaatkan Energi Kombinasi Kolektor Surya dan Tungku Biomassa Made Ricki Murti
Jurnal Energi Dan Manufaktur Vol 4, No.2 Oktober 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

In a drying process usually used forced flow condition. The energy used a dryer is usually only a single type of energy. Thus,the study is conducted on the natural flow dryer system by using the chimney. The energy used as a dryer is solar energy andbiomass that can be used simultaneously or one turns in accordance with the needs and circumstances. Has done testing of aprototype natural flow dryers utilize a combination of solar collectors energy and biomass furnace. Testing is done threetimes a process by measuring the following: the inlet air temperature of the biomass furnace, the outlet air temperature of thebiomass furnace, the inlet air temperature of the solar collector, the outlet air temperature of the solar collector, airtemperature into the drying chamber, air temperature out of the drying chamber, the mass decreasing of dried material, andthe intensity of solar radiation. Data were collected at each interval of 30 minutes was followed by processing of these datato obtain system performance, then made in the form of performance versus time graph. Results obtained in the form ofdrying time is achieved for one-time drying process is 7,5 hours, the average Solar collector efficiency is 54.4%, the averagebiomass furnace efficiency is12.57 %, the average drying efficiency is 22%, and the average system total efficiency is 2,8%.

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