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INDONESIA
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".
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Articles 16 Documents
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Search results for , issue "Vol 5, No.1 April 2011" : 16 Documents clear
Memanfaatkan Air Bilasan Bagas Untuk Menghasilkan Listrik Dengan Teknologi Microbial Fuel Cells I Nyoman Suprapta Winaya; Made Sucipta; A.A. Krisna Wira Putra
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

A microbial fuel cell design of fuel cells (MFC) by using the H type membrane (PEM) of the salt bridgeused in this study for the purpose of generating direct current electricity by making use of the rinse water Bagas.Bagas rinse water used to enrich microbes oxidizing the electron donor in the anode. Oxygen is pumped (forcedaeration) at the cathode. Within 7 to 9 days would be generated a steady flow system 240 mV. The use of moreelectrodes to extend electrode surface that is from 3, 6, and 9. And the use of two PEM has a thickness of 10 cmwith a different contact surface of each dianoda and cathode at 2 inches and 4 inches. So after testing is doneobtained data showing that the water blasan bagasse can be used to generate electricity with MFC technologyas well as with a combination of factors will also result in improved performance of the MFC.
Simulasi Perubahan Prilaku Regangan Geser Material Rel Pada Perubahan Suhu Permukaan Kontak Akibat Beban Gelinding/Gesek I Made Widiyarta
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Repeated wheel load over rail can cause rail material at the contact surface to accumulate severe plasticdeformation. The material fails after accumulating a critical shear strain and produce wear debris and fatigue cracks. Duringrolling/sliding contact between railway rails and wheel, temperature will rais at the contact surface due to frictional heatingand thermal stress will develop. If the generation of heat is high enough the rail material may soften.In this work, a simulation based on ratchetting failure is used to study shear strain behaviour of rail material withfrictional heating in rolling/sliding contact between wheel and railway rail. The simulation results show the materialsoftening and thermal stress increase the rate of shear strain accumulation by ratchetting leading to fail material morequickly.
Ketahanan Bending Komposit Hybrid Serat Batang Kelapa/Serat Gelas Dengan Matrik Urea Formaldehyde Nasmi Herlina Sari; Sinarep -; Ahmad Taufan; IGNK Yudhyadi
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The composite has its own advantages compared to other alternative techniques such material is strong, lightweight,corrosion-resistant, economical and so on. The purpose of this study was to investigate the characteristics of bending strengthfiber composite hybrid coconut trunk / fiber glass using urea formaldehyde resin.Hybrid palm trunk fiber /glass fiber composite have been made by hand lay up which volume fraction fiber hybridvariation namely 10:20, 15:15 and 20:10 (%) with length fiber 2 cm. Every Tests conducted were bending testing with eachvariation performed three times repetition. Bending test specimens in accordance with standard ASTMD 790.The results of bending strength of palm trunk fiber hybrid composite / fiber-glass with random fiber direction that thehighest bending strength in the palm trunk fiber volume fraction 10% and 20% glass fiber that is 22.7 N/mm2.
Karakterisrik Mekanik Proses Hardening Baja Aisi 1045 Media Quenching Untuk Aplikasi Sprochet Rantai Agus Purnomo
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Pada baja AISI 1045 dilakukan pengerasan (hardening) untuk memperoleh sifat tahan aus dan kekerasan yangtinggi, dengan proses heat treatment (perlakuan panas), yang dilanjutkan dengan proses quenching, Kekerasan yang dicapaitergantung pada temperatur pemanasan, holding time, dan laju pendinginan yang dilakukan pada laku panas. Kekerasanbaja AISI 1045 yang dicapai pada proses perlakuan panas dilanjutkan quenching agitasi dengan tebal sampel dan volumeair yang divariasikan, sehingga diperoleh kekerasan maksimum pada volume air 10 liter dengan nilai kekerasan rata-rata59,62 HRC, sedangkan untuk nilai kekerasan rata-rata pada volume air 15 liter yaitu 58,56 HRC, untuk volume air 20 literyaitu 57,62 HRC dan untuk volume air 25 liter yaitu 58,37 HRC. Dari hasil kekerasan yang dihasilkan pada masing-masingsampel berbeda-beda, hal ini disebabkan faktor lain yang mempengaruhi terjadinya perbedaan kekerasan pada masingmasingsampel hasil proses laku panas yang dipengaruhi oleh tebal sampel dan volume air quenching yang mempengaruhi.
Proses Treatment Dengan Menggunakan NaOCl Dan H2SO4 Untuk Mempercepat Pembuatan Bioetanol Dari Limbah Rumput Laut Eucheuma Cottonii I Nyoman Winjaya Putra; I Gusti Bagus Wijaya Kusuma; I Nyoman Suprapta Winaya
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The fermentation process of the waste of Eucheuma cottonii seaweed to become bioethanol can beaccelerated by providing special treatment, such as delignification process using NaOCl and immersion byusing a mixture of H2SO4 for different variations. The fermentation process is also be done by using the yeast ofSaccharomyces cerevisiae with a variety of mixtures, to determine the rate of bioethanol fermentation.In this study NaOCl has been used with variation of 0.25%, 0.50% and 0.75%. H2SO4 is used with aconcentration of 0.5% and the variations of Saccharomyces cerevisiae yeast with a ratio of 1: 0.0015; 1: 0.003;1: 0.0045; 1: 0.006 and 1: 0.0075 for every kilogram of waste Eucheuma Cottonii and yeast, and withfermentation time of 3, 6 and 9 days. As a comparison is the same treatment, but without the use of H2SO4.Based on the research, the following results obtained. The highest rate of bioethanol fermentation is4.4% per day and the highest levels of ethanol produced is 14.0%. This is achieved for where each kilogram ofwaste of Eucheuma cottonii is delignificated with a concentration of 0.5% NaOCl followed by a treatment inphysics, with the variations of yeast 1: 0.006 and with a time of fermentation for 3 days.
Analisa Performansi Destilasi Air Laut Tenaga Surya Menggunakan Penyerap Radiasi Surya Tipe Bergelombang Berbahan Dasar Beton Ketut Astawa; Made Sucipta; I Putu Gede Artha Negara
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

In principle, the distillation is a way to get clean water through desalination process dirty. In the refining processthere is a process of heat transfer, evaporation, and condensation. Heat transfer occurs from the heat source to the dirtywater. If water continues - it will happen again heated evaporation process. This steam on contact with cold surfaces it willbe a process of condensation on cold surfaces. In the distillation process condensate water is captured, germs and bacteriawill die by the heating process, and dirt will settle to the bottom basin One can use the sun's energy.In the system of solar distillation of sea water, absorber plate very important role because it serves as an absorberof solar radiation and convert light into heat energy that will heat the sea water above it. Based on the initial hypothesis ofthe authors that the type of flat-plate absorber is less than optimal, I will attempt to create a design and compare theperformance of sea water distillation appliance that uses a flat type absorber, absorber types of wavy, and wavy-coatedabsorbent type gravel. On the premise that type absorber has a broad corrugated heat absorption field is greater than theflat type absorber.Tests conducted from 09:00 am until 17:00 pm. The volume of sea water in the test as much as 30 liters. Testresults show the type of radiation absorber coated corrugated gravel produces more condensate is equal to 1295 grams withan average efficiency reaches 12.33%, and the type of radiation absorbent corrugated produce condensate for 1250 gramswith an average efficiency reaches 12.84% . While the radiation absorber can only produce a flat type of 795 ml with anaverage efficiency reaches 8.48%.
Performansi Kolektor Surya Tubular Terkonsentrasi Dengan Pipa Penyerap Dibentuk Anulus Dengan Variasi Posisi Pipa Penyerap Made Sucipta; Ketut Astawa; A.A. Kade Argha Dharmawan
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Berdasarkan geometrinya salah satu jenis kolektor surya adalah kolektor tubular. Kolektor tubular adalah sebuahkolekor surya konsentris, dimana antara kaca penutup (cover) dan pipa penyerap (absorber) membentuk anulus. Pipapenyerap berada disebelah dalam sedangkan kaca penutup dengan diameter yang lebih besar berada di sebelah luar. Saatini kaca penutup pada kolektor tubular hanya difungsikan untuk menghalangi panas terbuang ke lingkungan. Selain itukolektor tubular umumnya menggunakan tipe aliran fluida kerja satu arah. Pada penelitian yang telah dilakukan, dibuatrancang bangun sebuah kolektor tubular, dimana dipilih tabung kaca sebagai kaca penutup yang separuh bagiannyadimodifikasi dengan membentuk reflektor pada bagian bawah dan pipa penyerap yang dibuat membentuk anulus denganarah aliran mengikuti anulus.Metode yang umum digunakan untuk mengevaluasi performansi kolektor adalah instantaneous efficiency. Effisiensikolektor merupakan perbandingan panas yang diserap oleh fluida dan intensitas matahari yang mengenai kolektorPerformansi dari kolektor dapat dinyatakan dengan effisiensi temalnya.Eefisiensi aktual kolektor surya tubular terkonsentrasi dengan pipa penyerap dibentuk anulus dan kolektor suryatubular terkonsentrasi dengan pipa penyerap yang dibentuk lurus dengan variasi posisi pipa penyerap pada posisi 5 (L5 = -5,32 cm) lebih tinggi dibandingkan dengan energi berguna aktual (Qu,a) pada posisi L1 = 5,32 cm, L2 = 2,66 cm, L3 = 0 cm,dan L4 = -2,66 cm
Pengaruh Air Fuel Ratio Terhadap Emisi Gas Buang Berbahan Bakar Lpg Pada Ruang Bakar Model Helle-Shaw Cell I Gusti Ngurah Putu Tenaya; Made Hardiana
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The progress of developing science and technology are really influence to human life. Expansion of automotive astransportation and machine mover, can help human to do their activities easily. To get the machines move, is need much offuel from petroleum stock. But the stock of petroleum in world every day is very diminish and its unrenewable. Toanticipation and solve the problem about ability and dependence of society to use the fuel, is used gasses fuel such asliquified petroleum gas (LPG). The complete combustion are influence by three reason they are Air Fuel Ratio (AFR),homogeneity of mixture, and temperature of combustion. The complete combustion can be seen from content of exhaustemission. From the reason, researcher was did the research to know the influence of AFR toward the exhaust emission ofLPG fueled in the combustion chamber of Helle-Shaw Cell model.This experiment was did in the combustion chamber of Helle-Shaw Cell model with varieted the Air Fuel Ratio(AFR). The ratio is take from 14:1, 15:1, 16:1, 17:1, 18:1, 19:1, 20:1, and 21:1. The data that was observed are percentagesof carbon monoxide (CO), carbon dioxide (CO2), oxygen (O2) and hydrocarbon (HC).From result the research was get that the increasing of AFR from 14:1 to 20:1, the percentages of CO, O2, and HCare decrease but the percentages of CO2 is increase and in AFR 21:1 is occur decrease of CO2, while the percentage othergases are increase. To the LPG fuel stoichiometry of AFR is occur in 20:1. In stoichiometry of AFR the exhaust emission ofCO, O2, and HC are the most minimum but CO2 is the most maximum.
Simulasi dan Studi Eksperimen Defleksi Beam Bright Mild Steel Akibat Variasi Beban Horisontal Dewa Ngakan Ketut Putra Negara; Si Putu Gde Gunawan Tista
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Beam is a structural member whose cross-sectional dimensions are relatively smaller than its length. Beams play significantroles in many engineering applications, including buildings, bridges, automobiles, and airplane structures. Beams arecommonly subjected to transverse loading, which is a type of loading that creates bending in the beam. In designing of amachine component or structure, deflection has an important role to be considered. If deflection occurred exceeds limitallowed, it can affect serious hazard on machine elements or structure due to it can affect of component deviate from its mainfunction. In this research, material to be used was Bright Mild Steel (ASTM 1060), with specimen in the form of portal beam.Physical condition of beam was modeled use of BEAM3 2D. Variation of loads to be applied were W = 100, 150, 200, 250,300, 350, 400, 450, 500, and 550 gr and concentrated in the one of portal in vehorizontal direction. The result of simulationwas verificated by experimental data. Evaluation was carried out by statistical test (t-test). The result of simulation iscategorized to be good if the result of simulation is same with experimental data. The result of research shows thatloading has a significant effect on the deflection. The higher load affect the higher of deflection Modeling use of BEAM3 2Dgave good result of deflection. This is showed from t-test have done, where the result of simulation was same withexperimental data.
Perbaikan Sifat Korosi Baja Tahan Karat AISI 410 Dengan Perlakuan Implantasi Ion Tin Gaguk Jatisukamto; Viktor Malau; M Noer Ilman; Priyo Tri Iswanto
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Baja tahan karat martensitik AISI 410 digunakan secara luas untuk berbagai peralatan industri maupun peralatanmedis. Sifat tahan karat baja AISI 410 dapat ditingkatkan dengan memberikan perlakuan permukaan, salah satunya denganimplantasi ion. Implantasi ion pada permukaan memiliki keunggulan, yaitu proses dapat dilakukan pada temperatur rendah,kedalaman penetrasi dapat diatur dan tidak menyebabkan distorsi. Tujuan penelitian ini untuk mengetahui pengaruhimplantasi ion TiN terhadap laju korosi baja tahan karat AISI 410.Proses perlakuan implantasi ion menggunakan implantor ion milik BATAN Yogyakarta. Bahan yangdiimplantasikan adalah TiN dalam bentuk serbuk, diimplantasikan dengan energi 100 keV dan arus 10 ?A. Sampel daribahan baja tahan karat AISI 410 dibubut sehingga memiliki diameter 14 mm dan tebal 3 mm. Material diampelas, dipoles,dan dibersihkan dengan ultrasonic cleaner dan selanjutnya dimplatasikan dengan lima variasi waktu, yaitu 1, 2, 3, 4 dan 5jam. Sampel yang telah diimplantasi, selanjutnya dilakukan uji korosi dengan alat Potensiostat PGS 201T dalam mediaNaCl 0,9%.Dari pengujian korosi diperoleh hasil bahwa laju korosi raw material sebesar 3,58 mm/year menunjukkankecenderungan menurun hingga mencapai terendah yaitu 2,34 mm/year, yang diperoleh pada waktu implantasi antara 3 dan4 jam. Implantasi ion dengan waktu 3 dan 4 jam menunjukkan hasil hampir sama, yaitu masing-masing 2,35 dan 2,34mm/year. atau dapat dikatakan bahwa laju korosi baja tahan karat AISI 410 yang diberi implantasi ion TiN mengalamipenurunan laju korosi sebesar 34,64%. Penambahan waktu implantasi melebihi waktu optimalnya memberikankecenderungan laju korosi meningkat kembali.

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