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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".
Arjuna Subject : -
Articles 16 Documents
 1   2 
Search results for , issue "Vol 5, No.1 April 2011" : 16 Documents clear
Studi Eksperimental Pengontrolan Air Conditioning System Dengan Fuzzy Logic Control Sudirman -; I Gusti Bagus Wijaya Kusuma; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Electrical energy available in Indonesia at this time is not yet sufficient for all existing activities, this can be proved byfrequent occurrence of blackouts in several areas in Indonesia. It is necessary for a saving in electrical energy consumptionin all sectors, it is one of the refrigeration system. Research was conducted by testing AC (3 HP / 3 phase) using 2 differentcontrol systems, namely conventional control and FLC. Testing is done by placing the indoor units in cold storage room.Each test performed with varying load in the test room, ie no light burden, lamp 1000 Watt, and lamp 2000 Watt. Testingusing a conventional control system set point temperature 26 ° C and 3 variations of the differential is 1 , 2 and 3 , the FLCusing the temperature setting point 26 ° C. From this research we can conclude that the application of FLC system produceselectric energy consumption of the lowest compared to conventional control in this case is the differential 1. FLC applicationof electrical energy consumption at load 1000 Watt lower 11% and the load 2000 Watt 4% lower compared withconventional control in diffrensial 1.
Pembuatan Etanol Generasi Kedua Dengan Memanfaatkan Limbah Rumput Laut Eucheuma Cottonii Sebagai Bahan Baku I Gede Wiratmaja; 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

Dissociation energy of diatomic crisis happened in various states in the existing world cleavage has entered areal serious step and concerns so that must soon is searched its the problem solving method, including Indonesia. Source ofpotential feedstock which its the availability is abundance, economy-priced, has not many exploited by people and containssimple sugar sewer structures which can be turned into ethanol is lignocellulosic material which in a few last decade,becomes one of interesting research object to know potency from material - lignocellulose material in producing ethanol.One of water territory commodity of a real Indonesia potency to be developed is sea grass Eucheuma cottonii and rest ofyield cottonii which is not is exploited able to exploited returns to to become one of making feedstock of substitution ethanolof feedstock which during the time is applied like distance, cassava and sugar cane. In this research, approach gone throughin the form of assaying method of direct is field. Assaying is done by comparing various raffle ratio cottonii with yeast atfermentation process with various fermentation time and various delignification to look for comparison of ethanol puritygrade, ethanol volume and fermentation speed by using measuring instrument which so called vinometer.Result fromresearch done with method is upper obtained result as follows : At delignification NaOH 15% and with comparison (1:0,006) for raffle cottonii and yeast is obtained by purity grade, best ethanol volume and fermentation speed. Where highestethanol grade got from treatment biologically that is equal to 15,5% and in physicist equal to 14,8% on day 6 offermentation. So do with ethanol volume yielded is higher where maximum volume capable to be yielded is 245 ml atbiological treatment and 234 ml at physical treatment on day 9of fermentation. Meanwhile highest fermentation speedcapable to be yielded is 0,058 kg/day at physical treatment, and 0,063 kg/day at biological treatment on day 3offermentation so that as a whole ethanol purity grade, ethanol volume and fermentation speed yielded with treatmentbiologically gives higher level result if it is compared to ethanol grade yielded from treatment in physicist.
Studi Numerik dan Eksperimental Karakteristik Dinamik Model Sistim Suspensi Asnawi Lubis; Zulhendri Hasymi
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Karakteristik dinamik suatu struktur mesin sangat penting untuk diketahui untuk menghindari getaran yangberlebihan pada struktur tersebut. Karakteristik dinamik tersebut ditentukan oleh frekuensi pribadi, amplitudo dan modusgetar. Getaran pada suatu struktur mesin dapat terjadi karena adanya eksitasi baik yang berasal dari dalam maupun dariluar sistem. Jika frekuensi eksitasi berada di sekitar frekuensi pribadi sistem maka dapat terjadi fenomena resonansi, yangakan mengakibatkan amplitudo getaran yang tinggi. Amplitudo yang tinggi yang equivalent dengan defleksi dapatmengakibatkan kegagalan pada suatu sistem mesin ataupun struktur. Tulisan ini melaporkan hasil kajian secara numerikdan experimental terhadap karakteristik dinamik suatu model sistim suspensi. Sistim suspensi dimodelkan dan dianalisissecara numerik menggunakan metode elemen hingga dan diuji secara experimental menggunakan perangkat UniversalVibration System (UVS) untuk memperoleh karakteristik dinamik yang meliputi frekuensi pribadi dan amplitudo getaran.Hasil studi menunjukkan bahwa amplitodo makin besar pada nodal atau posisi yang makin jauh dari tumpuan pegas.
Analisis Karakteristik Rewetting Dalam Celah Sempit Vertikal Untuk Kasus Bilateral Heating Berdasarkan Perubahan Temperatur Awal Plat IGN. Bagus Catrawedarma; Indarto -; Mulya Juarsa; Ismu Handoyo; Kiswanta -; Ririn Fitriana
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Boiling heat transfer to analysis of effect main plate initial temperature to rewetting characteristics that arerewetting time, and pattern of rewetting were studied from transient temperature of surface plate. It is as result of experimentusing two vertical plate with 1 mm narrow gap. Debit and temperature of cooling water were controlled about 0,09 lt/s andsaturated temperature. The initial temperatures of main plate were changed from 500°C, 550°C, and 600°C. As results shownthat midle part of main plat has the highest value of rewetting time that is 310 second at 600°C initial main platetemperature, the lowest rewetting time is 40 second at 500oC initial main plate temperature on the bottom part of plate. Thehigher the plate initial temperature, the longer the rewetting time and variation of the plate initial temperatures can notinfluent the pattern of rewetting.
Pengaruh Temperatur Operasi Dan Kecepatan Superfisial Terhadap Komposisi Gas Produser Pada Gasifikasi Fluidized Bed Berbahan Bakar Sampah Terapung I Nyoman Suprapta Winaya; Made Sucipta; I Dewa Made Susila
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Management of waste into energy that is economically possible with fluidized bed gasification technology. Gasification is athermo-chemical process that converts biomass/solid waste into producer gas (CO, H2, CO2 and HC) by using air, steam, oxygenor its mixtures as a gasification agent. In a study of floating waste fuel gasification in pellet form with 1,25 cm diameter and 1.25cm height and of 1.22 gram mass, where is used oxygen enriched air as gasification agent. The operating temperature (Top) atreactor selected 500oC and 600oC with superficial velocities (Uo) are 0.105 m/sec, 0.125 m/sec, 0,145 m/sec., and 0,165 m/sec.From the research results showed that by increasing the operating temperature of 500oC to 600oC and increasing the superficialvelocity of 0.105 m/sec to 0.125 m/sec, did not influence directly the increasing of percentage/levels of CO, CO2 and HC gas thatproduced.
Studi Eksperimental Tentang Head Loss Pada Aliran Fluida Yang Melalui Elbow 90° Helmizar -
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Factors that cause energy loss in a piping system is something that is interesting and important to be studied moredeeply. 90° Elbow is a common connection in piping systems. Elbow 90° contributes to the incidence of head loss. Thisresearch will try to identify the influence of curvature (R/d) to the head lossThis study uses test model 90 ° elbows connection with the variation of the radius of curvature of the connectionelbow 90 ° to the pipe diameter (R / d) of 4.199 and 6.299. Flow rates are varied with Q1 = 0.000312345986 m3/s and Q2 =0.000265776 m3/s.The experimental results show that the R/d = 6.299 have a greater head loss rather than the R/d = 4.199. Strikingdifferences in the distribution of pressure coefficient between the radius of inner and outer radius. favorable pressuregradient phenomena occur on the inner radius. Events adverse pressure gradient at the outer radius of elbow allegedlycontributing to the loss of energy / head loss at the elbow 90 °.

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