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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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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%.
Eksperimental Adsorpsi dan Absorpsi Air Permukaan menggunakan Komposit hibrida Batu Basalt/ Moringa oleifera/ Tepung Lengket Alesandro Tarigan; I.D.G Ary Subagia; A.A.I.A 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 (545.375 KB) | DOI: 10.24843/JEM.2019.v12.i01.p04

Abstract

Pada penelitian ini, komposit hibrida sebagai adsorbsi dan absorpsi polutan pada air permukaan telah dibuat. Komposisi hibrida terdiri dari batu basalt (BB) dan moringa oleifera (MO) sebagai pengisi dan tepung lengket (TL) sebagai matrik. Komposisi fraksi berat yaitu 40 wt% pengisi dan 60 wt% matrik telah diaplikasikan. Proses pencetakan panas (hot-press) telah digunakan untuk memproduksi komposit hibrida masing-masing variasi dengan melalui suhu 200° Celcius dan tekanan 2000 psi. Tujuan penelitian menginovasi kemampuan bahan dalam fungsi sebagai penyerap dan pengikat polutan pada air permukaan. Perendaman komposit hibrida selama 14 hari pada air permukaan telah dilakukan untuk menguji sifat adsorpsi dan absorpsi. Turbidity dilakukan untuk menentukan nilai kekeruhan dan nilai kandungan micro-organisme pada air permukaan sebelum dan setelah penambahan komposit hibrida. Hasil pengujian ditunjukan pertambahan paling tinggi yaitu pada spesimen dengan komposisi 40% batu basalt dan 60% tepung lengket dengan pertambahan berat sebesar 21,11 gram selama 336 jam dan paling kecil pada spesimen dengan komposisi 40% moringa oleifera dan 60% tepung lengket dengan pertambahan berat sebesar 4,15 gram selama 336 jam. Pada air dilakukan pengujian terhadap kekeruhan, pH dan bakteri pada air setelah dilakukan pengujian, dimana hasil pada spesimen dengan komposisi 40% moringa oleifera dan 60% tepung dapat mengurangi bakteri coliform sebesar 78,6%. hybrid composition is consisted of basalt and moringa oleifera with filler wood flour as a matrix. The composition of heavy fractions is 40 wt% filler and 60 wt% matrix has been applied. The hot-press process has been used to produce hybrid composites of each variation through a temperature of 200° Celsius and a pressure of 2000 psi. The purpose of this research is to inovate the ability of materials to function as absorbent and as binder of pollutants in surface water. Immersion of hybrid composites for 14 days in surface water has been carried out to test the characteristic of adsorption and absorption. Turbidity is done to determine the turbidity value and the value of micro-organism content in surface water before and after the addition of hybrid composites. The test results showed the highest increase in the specimens with a composition of 40% basalt stone and 60% sticky flour with a weight gain of 21.11 grams for 336 hours and the smallest in specimens with a composition of 40% moringa oleifera and 60% wood flour with weight gain amounting to 4.15 grams for 336 hours. In the water testing of turbidity, pH and bacteria on water after testing, the results on specimens with a composition of 40% moringa oleifera and 60% wood flour can reduce coliform bacteria by 78.6%.
Catu daya sel surya serba guna (portable) untuk telepon genggam Wahyu Hidayat; Riri Sadiana
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 Dengan semakin berkurangnya minyak bumi yang cadangannya terus berkurang mendorong pencarian sumber energi alternatif. Satu diantaranya sinar matahari yang belum dimanfaatkan secara maksimal. Guna mendapatkan energi listrik dapat menggunakan sel surya (solar cell) untuk menyerap energi dari sinar matahari yang dapat kita gunakan energi listrik di tempat atau wilayah khususnya didaerah terpencil/terisolasi yang belum ada jaringan listrik PLN. Maka dapat kita manfaatkan sinar matahari menjadi energi listrik dengan sel surya sesuai kebutuhan khususnya untuk catu daya rendah dengan tegangan sekitar 5 Volt untuk keperluan telepon genggam (hand phone). Metode yang digunakan adalah dengan eksperimen dan pemodelan alat catu daya yaitu; Catu daya sel surya serba guna (portable) untuk telepon genggam (handphone). Hasil yang diharapkan catu daya sel surya serba guna (portable) dapat mensuplai telepon genggam (HP) sehingga dapat mengatasi permasalahan energi listrik di daerah terpencil/belum ada jaringan listrik dari PLN dan atau dapat juga dengan listrik PLN. Bahkan kedepan dapat dikembangkan dan ditingkatkan lagi kemampuan energi listrik yang dihasilkan dapat mencapai 12 Volt untuk catu daya lap top. Kata kunci: Sel surya, power supply, telepone genggam Abstract With the decreasing oil reserves dwindling prompted the search for alternative energy sources. One of them sunlight that has not been fully utilized. In order to obtain electrical energy can use solar cells (solar cells) to absorb energy from the sun that we can use electrical energy in a place or region, especially in remote areas / isolated that there is no electricity network. Then we can use the energy of sunlight into electricity with solar cells as needed, especially for the low power supply with a voltage of about 5 Volts for the purposes of a cell phone (mobile phone). The method used is to experiment and modeling tools, namely power supply ; Power supply solar cells multipurpose (portable) for handheld devices (mobile phones). Results are expected solar cell power supply versatile (portable) can supply a mobile phone (HP) so that it can overcome the problems of electric energy in isolated areas / no electricity network and can also be electrically or PLN. Even the future can be developed and enhanced the ability of the electrical energy generated can reach 12 Volt power supply lap top. Keywords: solar cells, power supply, mobile phone
Wasted Heat Engine Utilization in Central AC Condenser Type Water Chiller for Economical Energy Water Heaters I Made Rasta
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Central AC type water chiller is a refrigeration machine that release heat to environment. Heat energy that released to environment comes from room heat load that absorbed by machine and heat from compressor. The best form in using this loss energy is heat recovery water heater technology, where this machine will take heat from condenser by a heat exchanger to heating water. Refrigerant will flow in the heat exchanger before entering condenser, after that refrigerant flow to other components such as, expansion valve, evaporator, compressor and than return again to condenser, this process will be cycling regularly (closed cycle). Based on experimental and analysis result especially for AC with capacity 2 Pk, and tank capacity 75 liter, with water heater recovery device obtained that: (1) Compressor power consumption decrease from 1.66 kW to 1.59kW. (2) Heat rejected from condenser and used by water heater has ratio 4.683 kJ/s and 1.59 kJ/s, with water heater efficiency is 32.2%. (3) Maximum water temperature can be reached are in range 34oC – 47.5oC in 10-150 minutes and flow rate is 0.5 – 2.5 liter /min
Pengujian Propagasi Gelombang Mikroelektromagnetik pada Komposit Epoxy Berpenguat Serat Ijuk Nitya Santhiarsa; Eko Marsyahyo; Achmad Assad Sonief; Pratikto Pratikto
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:Perlakuan alkali pada serat ijuk untuk bahan penguat atau pengisi komposit bermatrik epoxy bertujuan untukmengurangi lignin dan hemiselulosa sehingga kompatiblitas serat alam dengan bahan matrik polimer dapatditingkatkan, namun pada sisi lain pengurangan lignin dan hemiselulosa mempengaruhi juga kadar kandungankelompok fungsional yang terkandung dalam lignin dan hemiselulosa sehingga mempengaruhi sifat listrik dari serat,baik itu sifat resistivitas listrik maupun konstanta dielektrik. Perlakuan alkali menggunakan tiga macam larutan alkaliyang memiliki perbedaan kuat basa yaitu NH4OH, NaOH dan KOH. Variasi fraksi berat serat dilakukan pada prosespembuatan komposit dan uji yang dilakukan pada komposit adalah uji propagasi gelombang mikroelektromagnetik..Berdasarkan hasil uji propagasi ini, dapat disebutkan komposit matrik epoxy berpenguat serat ijuk yang memilikikemampuan pantul dan kemampuan serap radiasi gelombang mikroelektromagnetik paling tinggi adalah kompositdengan serat ijuk tanpa perlakuan dan fraksi berat 50 %.Kata kunci : perlakuan alkali, serat ijuk, uji propagasiAbstract:Alkaline treatment on sugar palm fibers that used to reinforcement or filler composite with epoxy matrix aim to reducelignin and hemicelullose so compatibility of natural fibers with polymer matrix could be increased, but on the other sidethe reduction of lignin and hemicelullose also affect content of functional group in lignin and hemicelullose so as toaffect the electrical properties of the fibers, that is resistivity of electricity and the dielectrics constant. Alkaline treatmentusing three kinds of a solution of alkaline that have a difference base strength namely NH4OH , NaOH and KOH.Variation of weight fraction fibers performed on the process of composite making and test it conducted in composite ispropagation microelectromagnetic wave test . Based on result of propagation test, could be mentioned compositematrik epoxy with sugar palm fiber reinforcement that have the highest ability of reflected and absorptivemicroelectromagnetic wave radiation is a composite with untreated sugar palm fiber with 50 % weight fractionKeywords : alkaline treatment, palm sugar fibers, propagation test
Pengaruh Post Weld Heat TreatmentTerhadap Sifat Mekanis dan Korosi Sambungan Las Spiral Saw pada Pipa Baja ASTM A252 Ipick Setiawan; Mochammad Noer Ilman
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Metal joint with welding system is increasingly used. i.e structure, piping or machine constuction. Some ofthe problems on welding is residual stress dan over hardness can decrease the weld toughness stresscorrosion cracking. An effort to solve this problem is PWHT. PWHT has multiple functions, those are toreduces residual stress,increases ductility of HAZ and improves toughness in weld metal and HAZregions.Heating process with various temperature is expected to make optimum PWHT temperature.Thisexperiment was carried out to know the effect of PWHT torwad the toughness an corrosion of helicalwelding pipe ASTM A252. The welding process use SAW with groove double V, electrical current 375 A ,voltage 35 V and heat input 2,8 kj/mm. Post weld heat treatment was carried out at various temperature450oC, 550oC and 650oC during 3 hours followed by cooling process in furnace after that, these specimensware tested the hardness, tensile strength, toughness and corrosion. The Result of research show thatincreasing of PWHT temperature, can increase the toughness and corrosion resistance of joint weldin, butthe tensile strength is decreasre. The optimum PWHT temperature is 550o C with toughness 81 J at 0O C.
Analisis perbandingan performansi mesin pengkondisian udara dengan kompresor terisolasi dan tidak terisolasi I Made Rasta; I Dewa Made Susila
Jurnal Energi Dan Manufaktur Vol 2, No.1 Juni 2007
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

During installation of an AC Split, the technician usually didn’t release the compressor insulation. They assumed that the compressor will have longer life time rather than without insulation. Actually, in this case the compressor worked hardly in insulated condition by glass wool. The overload signal then will immediately stop the electric current to the compressor. The research was aimed to investigate the AC performance if compressor in insulated condition and without insulation. The tested unit was AC 2 PK, water chiller type. The result showed, COP decreased 0.35; electrical consumption increased 18.7 Watt; and the refrigerating effect slightly decreased, respectively.
Pengaruh Perubahan Bentuk Bead Panel Kendaraan terhadap Frekuensi Alamiah pada Kondisi Batas Bebas-Bebas Sukanto Sukanto; I Made Miasa; R. Soekrisno
Jurnal Energi Dan Manufaktur Vol 7 No 2 (2014): Oktober 2014
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Setiap kendaraan perlu dinding, baik atap maupun lantai. Dinding yang polos biasanyamudah bergetar. Untuk mengurangi getaran perlu dibuat kaku dengan cara penambahanbeberapa bentuk alur atau bentuk bead. Tujuan penelitian ini adalah untuk mengetahuipengaruh stiffness panel terhadap peningkatan frekuensi alamiah pada panel kendaraan.Penelitian ini menggunakan pendekatan ekperimental dengan prinsip meningkatkankekakuan panel melalui rekayasa pembentukan logam secara mekanis. Material pelat bajaASTM A 29 didisain secara manual sehingga memiliki bentuk pola bead tertentu. Panelberpola bead tersebut didisain dengan memiliki total volume yang sama, dengan tebal pelatyang digunakan adalah 1,2 mm dan ukuran spesimen adalah 530 mm x 530 mm.Selanjutnya spesimen panel diukur pada kondisi bebas-bebas. Spesimen diberikan eksitasisehingga nilai frekuensi alamiahnya terekam pada piranti instrument pengukur getaran yangdilengkapi program berbasis LabView. Hasil penelitian ini adalah dengan pembuatan polabead pada panel kendaraan, frekuensi alamiah panel dapat meningkat mulai dari 2 kalisampai dengan 4 kali, dibandingkan dengan panel datar tanpa bead. Peningkatan rasiofrekuensi alamiah tiga panel yang paling tinggi dicapai pada panel berbentuk thirteen-plusbead, panel berbentuk thirteen-square bead dan panel berbentuk nine-plus bead, yaituberturut-turut 636,6 Hz, 258,62 Hz dan 248,79 Hz dari 156,6 Hz panel tanpa bead.Kata kunci: Getaran, panel bead, frekuensi alamiah, dan kekakuan.Each vehicle needs wall, both the roof and the floor. The plain wall is usually easy to vibrateso to reduce vibrations need to be made rigid by the addition of some form of groove or beadform. The purpose of this study was to determine the effect of the increase in panel stiffnessat the natural frequency of the vehicle panel. This study uses an experimental approach tothe principle of increasing the rigidity of the panel through mechanical engineering metalforming. Steel plate ASTM A 29 designed manually so that it has a certain shape beadpatterns. The bead-patterned panels designed to have the same total volume, with platethickness used is 1.2 mm and the size of the specimen is 530 mm x 530 mm. Furthermore,the panel specimens measured at the free condition. Specimens are given excitation so thatthe value of the natural frequency of the measuring instrument recorded on devicesincorporating vibration Lab View based program. Results of this study was to manufacturebead pattern on the vehicle panel, the natural frequency of the panel can be increased from2 times to 4 times, compared with a flat panel without bead. Increased natural frequencyratio of the three panels are the highest achieved in thirteen-plus bead panel, thirteen-squarebead panel and nine-plus bead panel, respectively 636.6 Hz, 258.62 Hz and 248.79 Hz from156.6 Hz without bead panel..Keywords: Vibration, panel bead, natural frequency and stiffness
Studi Pengaruh Aktifasi Termal terhadap Struktur Mikro dan Porositas Zeolit Alam I Putu Putra Widia Semara; Tjokorda Gde Tirta Nindhia
Jurnal Energi Dan Manufaktur Vol 4, No.2 Oktober 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Zeolite is known as a material having ability as an adsorbent for metal pollutant in both liquid and gas wastes. Asinitial study in utilizing natural zeolite, and in order to be understood its possibility to control the dangerous metal pollutantfrom the liquid and gas wastes, then research regarding physical properties from the natural zeolite should be conductedfirst. The natural zeolite will be able to adsorb the metal pollutant in the waste if already be activated, and one of the methodto activate is by applying thermal activation technique or heating. The purpose of this research is to observe the change onmicrostructure to be related with porosity of natural zeolite from Sukabumi, West Java, Indonesia due to thermal activated,to be compared to one without thermal activation. The temperature variations for thermal activation namely: 100, 200, 300,400, and 500 o C with all have the same holding time 15 minutes. The microstructure then is observed by using stereo opticalmicroscope following the standard of ceramography standard. The change in microstructure then is analyzed and studied tobe related with the ability of natural zeolite to adsorb the metal pollutant
Performance Analysis of Window Type Air Conditioning with Addition of Heat Exchanger Equipment I Ketut Gede Wirawan
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

One manner to be used to increase refregration effect is by flowing hot refrigerant out from condensor, it is then touched with the refrigerant out from evaporator on a heat exchanger of counterflow type. Experiment was done by taking samples of pressure at suction (p1) and discharge (p2) of compressor and box temperature (Tr1, Tr2, Tr3, Tr4). By knowing of pressure at suction (p1), the enthalpy into compressor is known. By assuming the process is isentropic (compressor), isobar (condenser and evaporator), and isenthalpy (expansion valve), the enthalpy into condensor, expansion valve and evaporator were known. In 60 minutes, compression work of air conditioning with heat exchanger is 31,588 kJ/kg, and without heat exchanger is 33,796 kJ/kg. Effect refrigeration average with modification is 155,55 kJ/kg and without modification was 153,40 kJ/kg so that coefficient of performance with modification more than without modification. Air conditioning with modification had initial refrigration rate was 67,193 J/s and 0,043 J/s at the end minute, meanwhile, refrigeration without modification had cooling rate at start 66,538 J/s and 0,935 J/s at the end.

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