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All Journal Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur TEKNIK Rekayasa Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Journal of Mechanical Engineering Science and Technology International Journal of Engineering and Emerging Technology
Dewa Ngakan Ketut Putra Negara
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Udayana
Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Characterization of Aluminum Matrix Metal Composite Hybrid Reinforced With SiCw/(Al2O3-Mg) on Thermal Conductivity and Hardness Suarsana, Ketut; Soenoko, Rudy; Negara, DNK Putra; Sunu, P.W.
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.18

Abstract

Characteristics of composite materials that are light, strong, heat resistant, and high hardness are needed in their application. This study aims to obtain a hard material and good heat conductivity, with the innovation of making aluminum matrix composites (AMC) from aluminum powder as a matrix, combined with silicon-carbon whisker (SiCw) and alumina particles (Al2O3p), and adding Magnesium through the powder process metallurgy. The method of making composites was carried out by means of powder metallurgy. The research variables composition I, II, and II with Al/(SiCw+Al2O3/Mg), were given temperature treatment: 500, 550, and 600oC. The test results show that there is an increase in the mechanical properties of the composites both from variations in composition and also from variations in treatment temperature because the bond resulting from the addition of Al2O3 reinforcement has hard and fine grain properties. The physical and mechanical properties of the test results are in the form of the highest density at composition I, 600oC (2,699 gr/cm3) while the hardness at composition III is 600oC (42,438 HV) and heat conductivity at composition III, 600oC (185,183 Watt/m.oC). Scanning with SEM showed that the pore size decreased from the treatment temperature of 500oC to 600oC due to phase changes and a stronger bond between the matrix and the reinforcement. So that the influence of composition and temperature will affect the thermal conductivity, hardness, and density of the composites.
PELATIHAN TEKNIK ELEKTROPLATING NIKEL BAGI INDUSTRI KERAJINAN KUNINGAN DI DESA KAMASAN KABUPATEN KLUNGKUNG T. G. Tirta Nindhia; I W. Surata; I K. Adi Atmika; D.N.K. Putra Negara; A.A.I.A. Sri Komaladewi; I M. Sucipta
Buletin Udayana Mengabdi Vol 12 No 2 (2013): Volume 12 No.2 – September 2013
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

The Village of Kamasan at Klungkung in the Province of Bali is recognized as a centre of metal handicrafts,especially the handicraft made from brass. Many home industries for the brass handicraft are established in thisvillage. Recently due to Rapid progress of Tourism in Bali, The brass handicraft in Kamasan are growing wellbecause the demand for the souvenir. However some problem arise such as limited of variation, and surface qualityof the brass handicraft that tend to become blurred or dull due to the process of oxidation. This condition makethe brass handicrafts become not so interest as silver handicrafts that can shine for quite long time. To overcomethis problem it is needed to coating the surface of the brass handicrafts so that there will be no contact withoxygen. The coating will be more benefit if able to exhibit more interesting appearance, as what nickel coatingcan affect the appearance of the surface to become like silver but more clear. Equipment for nickel elektroplatingwas designed for this purpose and donated for this purpose. The unique of the equipment that was donated weresmall in size therefore only low electric power is needed, only 1 liter electrolyte was used and can be use manytime. The positive result is obtained for this activity where all participants able to operate the elektroplatingprocess with excellent result.
Penggunaan Alat Cetak untuk Produksi Jaja Saga Dewa Ngakan Ketut Putra Negara; I M Gatot Karohika; I D M Krishna Muku
Buletin Udayana Mengabdi Vol 15 No 1 (2016): Jurnal Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Every place in Bali has a food specific characteristic. Gianyar region is known with its jaja klepon and Klungkung is famous with serombotan. In Melinggih Kelod Village, District of Payangan is developing a type of food, called jaja saga. Micro industries of producing this food are made by some households in this village. The steps of making jaja saga follow; preparing of row materials (coconut, rice powder, sugar, salt and water), mixing of the row materials, leveling of row materials on the taplon and roasting. After 10 minutes jaja saga has cooked. The final process is packaging. The leveling of row materials on the taplon process is the stage that needs the long enough time; it is about 5 to 8 minutes. To overcome the problem, it is made a molding jaja saga device. The principle work of the device is by pressuring a circle-pressure device with 17.90 cm in diameter trough a mold hole with 18 cm in diameter. Pressuring mechanism is undertaken by chain, sprocket and thread of the screw transmission with handle mover. The results of device test show that device work mechanism has successfully worked but improving regarding with the type of row materials used is needed so better results will be obtained.
PENERAPAN TEKNOLOGI TEPAT GUNA DIGASTER PORTABEL DAN MOLASE PADA KELOMPOK TERNAK TULUS NADI DI BANJAR GAMBIH Dewa Ngakan Ketut Putra Negara
Buletin Udayana Mengabdi Vol 19 No 4 (2020): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.828 KB)

Abstract

Pembangunan di sektor peternakan terutama di daerah pedesaan terus dikembangkan oleh pemerintah ditandai dengan semakin banyaknya terbentuk kelompok-kelompok tani dan ternak. Salah satunya adalah Kelompok Tani Ternak Tulus Nadi di Banjar Gambih Desa Buahan Kecamatan Payangan. Namun pengelolaan peternakan dan pemanfaatan limbah peternakan belum dilakukan secara optimal. Pada pengabdian ini diaplikasikan teknonogi tepat guna yaitu digester biogas portable untuk mengolah kotoran ternak menjadi biogas dan teknologi molase untuk mengolah kotoran ternak menjadi pupuk serta mengolah jerami kering menjadi pakan ternak. Dari pembinaan yang dilakukan menunjukkan bahwa kelompok ternak sudah mampu memanfaatkan jerami kering untuk dijadikan pakan ternak menggunakan molase, mampu memanfaatkan kotoran ternak menjadi biogas dan memanfaatkannya untuk menyalakan kompor dan menyalakn generator listrik serta mengolah kotoran ternak menjadi pupuk dengan sentuhan teknologi molase.
Pemurnian Biogas Dari Gas Pengotor Hidrogen Sulfida (H2S) Dengan Memanfaatkan Limbah Geram Besi Proses Pembubutan Komang Metty Trisna Negara; Tjokorda Gde Tirta Nindhia; I Made Sucipta; I Ketut Adi Atmika; Dewa Ngakan Ketut Putra Negara; I Wayan Surata; A.A.I.A. Sri Komaladewi
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

This research is intended to utilize waste steel chips from the process of turning (process in which lathemachine is used) for purification of biogas from the gas of hydrogen sulfide (H2S) contaminant to supportthe promotion of zero waste industrial and manufacturing process in the world. The waste of Iron chips iscollected and selected. Only long and spiral like of iron chips that are useful for this purpose. Since thechips having residual stress due to strain hardening during turning process, then the annealing processshould be done before compacting to form a billet.The thickness of the billet was 1 cm and 6 cm indiameter with weight 500 gram. The annealing proces was carried out by burning the iron chip until reachthe red color of fire. During the annealing process the iron inside the steel will react with oxygen to formiron oxide (Fe2O3) and if during oxidation there is a water vapor in the air then the iron bog ore Fe(OH)3 willbe formed. Both of Fe2O3 and Fe(OH)3 are very reactive to H2S and therefore able to eliminate the H2Scontaminant inside the Biogas. The billet is used as a filter and to be installed in the line of biogasdistribution. The result indicate that the the iron chips is potential to be utilized to reduce the H2Scontaminant in the biogas
Efek Tegangan Listrik dan Waktu Proses Elektroplating Krom Keras terhadap Tebal Lapisan Ketut Suarsana; I M. Astika; D.N.K Putra Negara
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 (540.316 KB) | DOI: 10.24843/JEM.2019.v12.i02.p05

Abstract

Proses pelapisan krom keras merupakan proses akhir atau tahap penyelesaian pada kebanyakan pembuatan komponen agar tidak cepat aus, seperti pada poros, pasak, ring piston, silinder, bearing dan crank shaf. Dalam bidang industri sifat mekanik yang banyak diperlukan pada logam yang dipergunakan adalah kemampuannya untuk tahan aus dan tahan korosi yang mana kita ketahui logam mempunyai reaksi yang sangat aktif terhadap perubahaan temperatur dan cuaca, maka perlu dilakukan pelapisan sehingga kemungkinan suatu bahan logam terkena korosi bisa dihambat. Bahan spesimen yang di gunakan adalah Baja St 60 (C 0.40%; Mn 7%; Si 0.28%; P+S 0.09%; Fe 98,53%) dengan variasi tegangan listrik: 4, 6, dan 8 volt, untuk variasi waktu elektroplating krom keras 30, 45, dan 60 menit. Pengujian yang dilakukan dengan pengukuran ketebalan lapisan menggunakan skala foto mikro dan menghitung ketebalan lapisan permukaan. Hasil penelitian menunjukkan bahwa semakin tinggi tegangan listrik yang digunakan dan semakin lama waktu proses pelapisan krom keras maka meningkat ketebalan lapisannya. Ketebalan lapisan permukaan yang paling tebal didapatkan pada tegangan 8 volt dengan waktu pelapisan 60 menit dengan ketebalan lapisannya sebesar 89,37 ?m, sedangkan ketebalan lapisan permukaan tipis didapat pada tegangan 4 volt dengan waktu pelapisan 30 menit ketebalan lapisannya sebesar 20,18 ?m. Jadi tegangan listrik dan waktu electroplating dapat mempengaruhi dan memberikan efek terhadap ketebalan lapisan yang terjadi pada Baja St.60. The hard chrome coating process is the final process or completion stage in most parts making so as not to wear out quickly, such as on the shaft, pegs, piston rings, cylinders, bearings and crank shafts. In the industrial field of mechanical properties that are much needed in the metal used is its ability to withstand wear and corrosion resistance which we know metals have a very active reaction to changes in temperature and weather, coating is necessary so that the possibility of a metal being corroded can be inhibited. The specimens used were Baja St 60 (C 0.40%; Mn 7%; Si 0.28%; P + S 0.09%; Fe 98.53%) with variations in electrical voltage: 4, 6 and 8 volts, for time variations hard chrome electroplating 30, 60 and 90 minutes. Tests carried out by measuring the thickness of the layer use a micro photo scale and calculate the thickness of the surface layer. The results showed that the higher the voltage used and the longer the coating process was hard chrome, the thickness of the layer increased. The thickest surface layer thickness was obtained at 8 volts with a coating time of 60 minutes with a layer thickness of 89.37 ?m, while the thickness of the thin surface layer was obtained at a voltage of 4 volts with a coating time of 30 minutes layer thickness of 20.18 ?m. So the electrical voltage and time of electroplating can affect and give effect to the thickness of the coating that occurs in Steel St.60
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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2156.755 KB)

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
Potency of Micro Hydro Power Plant Development Use of Kelampuak River Flow Located in Tamblang Village – Buleleng Dewa Ngakan Ketut Putra Negara
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Need of electrical energy is increasing along with people population and economic growth. According to PLN data, Bali Province’s electrical consumption is predicted growth 5,6% in average every year. Until year 2007, electrical condition in Bali is categorized critical. If Power Plat in Bali, PLTG Gilimanuk that has power 130 MW is out of system, affecting Bali’s electrical back up is minus. Consecuenlly, it will be extinguishing if there is not adding power plan or new energy supply. This problem needs to be anticipated by use of thermal energy program such as coal, gas and geothermal and use of alternative energy such as solar, wind and ocean energies. Regency of Buleleng is one of Regency in Bali having potency of renewable energy development especially water resource. It has some rivers that have potency to be developed as a Micro Hydro Power Plant (PLTMH). One of them is Kelampuak River which is located in Tamblang Village. As a first step in developing of Micro Hydro Power Plant, it needs to be known water debit and head of the river. For that reason, it needs to be investigated debit and head of Kelampuak River so that it can be predicted the power can be generated.
Machinability baja AISI 1040 pada proses bubut dengan variasi cutting speed dan feed rate AAIA Sri Komaladewi; DNK Putra Negara
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (21.15 KB)

Abstract

In order to obtain desired results of machining process (turning), parameter of process and material characteristic to be machined should be well known. This is due to different machining conditions and material yield different material machinability as well. It is needed to investigate of material machinability (AISI 1040) such as force, power and shear angle under different cutting speed (80, 160 and 240 m/min) and feed rate (0.1, 0.2, and 0.3 mm/rev). The results of investigation show that; at the same cutting speed the higher feed rate the higher cutting force needed; the higher cutting speed and feed rate, the higher power needed; at feed rate 0.1 mm./rev and 0.3 mm/rev, the higher cutting speed the shear angles has a trend to incline; at feed rate 0.2 mm/rev, cutting speed from 80 to 160 m/min yield increasing of shear angle, however, from 160 to 240 m/min shear angle declines.
Co-Authors Anak Agung Istri Agung Sri Komaladewi I .G. P. Agus Suryawan I D M Krishna Muku I Dewa Made Kirshna Muku I Gusti Ngurah Nitya Santhiarsa I Gusti Ngurah Priambadi I Ketut Adi Atmika I Ketut Adi Sugita I Ketut Suarsana I Made Astika I Made Gatot Karohika I Made Rasta I Wayan Surata IGN Arimbawa Komang Metty Trisna Negara M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Made Agus Susantika Made Sucipta Putu Wijaya Sunu Rudy Soenoko Si Putu Gde Gunawan Tista Sunu, P.W. Tjokorda Gde Tirta Nindhia Tjokorda Gde Tirta Nindia Wayan Nata Septiadi