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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 13 Documents
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Search results for , issue "Vol 4, No.1 April 2010" : 13 Documents clear
Analisa Performansi Sistem Pendingin Ruangan dan Efisiensi Energi Listrik padaSistem Water Chiller dengan Penerapan Metode Cooled Energy Storage Komang Metty Trisna Negara; Hendra Wijaksana; Nengah Suarnadwipa; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Untuk menghemat penggunaan energi listrik sebagai akibat penggunaan AC (air conditioning) yang semakin meningkatmaka telah dilakukan modifikasi pada sistem AC tersebut dengan mengganti fungsi evaporator menjadi box Cooled EnergiStorage (CES). Pada modifikasi ini fungsi AC digabungkan dengan AHU dengan memanfaatkan fungsi evaporator sebagaisumber pendinginannya, dimana evaporator dimasukkan kedalam box yang telah diisi air dengan volume 0,072 m3. Denganmenggunakan pompa, air dingin tersebut dialirkan ke AHU, selanjutnya dimanfaatkan sebagai pendingin ruangan.Pengujian dilakukan dengan membandingkan dua cara pengoperasian. Pertama, sistem AC dan AHU dioperasikan secarabersamaan, sedangkan cara kedua sistem AC dioperasikan untuk mendinginkan air di box CES sampai mencapai temperaturyang hampir sama seperti pada saat cara pertama. Selanjutnya sistem AC dimatikan dan AHU dioperasikan untukmendinginkan ruangan. Hasil yang diperoleh pada cara pertama adalah temperatur air di box CES mencapai sekitar 0,9oCdalam waktu pengujian selama 1 jam (interval pencatatan data setiap 10 menit) sedangkan temperatur ruangan mencapai12,9 oC dan penggunaan daya listriknya mencapai 0,8650 kWh. Pada cara kedua, temperatur air di box CES mencapaisekitar 0,5 oC pada selang waktu pengujian selama 30 menit. Setelah AC dimatikan dan AHU dioperasikan, ruangan hanyamampu didinginkan mencapai temperatur 17,8 oC dalam waktu 30 menit. Tetapi temperatur air di box CES mencapai 16,5 oCpada 10 menit pertama dan terjadi peningkatan yang sangat kecil pada menit-menit berikutnya. Penggunaan daya listrikdengan cara yang kedua ini menunjukkan terjadinya penghematan sebesar 0,4201 kW dibandingkan dengan cara pertama.
Pengaruh Kuat Arus Listrik Dan Waktu Proses Anodizing Dekoratif Pada Aluminium Terhadap Kecerahan Dan Ketebalan Lapisan I Gst. Ngr. Nitya Santhiarsa
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

To increase assess aluminium of decorative aspect hence finishing processes must be used, like coloringprocess. Hence layer anodizing developed now where you can make aluminum metal look more interesting so thefinish can increase the economic value. Anodizing is the process formation of oxide layer on the metal with themetal, especially aluminum reacting with oxygen (O2) from the electrolyte sulphate acid (H2SO4).This research uses2024-T3 aluminum metal as a parent to be coated, with the electric current treatment 1 Ampere, 2 Ampere, Ampere,and 3, and changes in immersion variations time 10 minutes, 20 minutes, and 30 minutes. Tests performed includetesting the brightness (light illumination) and layer thickness measurement.The result of research show that bestvalue for the examination of brightness obtained at electrics current 1 ampere and time anodizing 10 minute equal to11519.53 lumens/m2 and thickness obtained at electrics current 3 ampere and anodizing time 30 minute equal to 5?m, value lowest for the examination of brightness obtained at electrics current 1 ampere and time anodizing 10minute equal to 10180.05 lumens/m2 and thickness obtained at electrics current 3 ampere and anodizing time 30minute equal to 2?m
Analisa Unjuk Kerja Motor Bensin Akibat Pemakaian Biogasoline I Gede Wiratmaja
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Renewable energy has become a major issue and debate in recent years. This is not apart from the depletion of energyreserves do not renewable in the bowels of the earth. Particularly oil, which is estimated to 20 years from now will be exhaustedso that the solution should be found to obtain adequate alternative energy. One way is to use what is biogasoline alternative fuelmixture of gasoline and alcohol with a specific ratio, it is due to biofuels (alcohol) can not stand alone as a pure substitute forconventional fuels, especially gasoline. This Biogasoline tested on a conventional engine to find work and performance comparedwith performance with the use of gasoline enginesIn a study conducted to find out is by direct testing methods in the field. Testing is done by comparing the variation of theratio of gasoline and alcohol mixture with varying spin machine, using a tool called the Universal dynamometer Module .Results from research conducted by the above method obtained the following results: Biogasoline (90:10) to producepower and greater torque compared to other fuels tested in this study, but still more wasteful in terms of fuel consumption.
Perencanaan Instalasi Air Bersih dan Air Kotor Pada Bangunan Gedung dengan Menggunakan Sistem Pompa Ketut Catur Budi Artayana; Gede Indra Atmaja
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Construction of a building planned for the installation of clean water with clean water source comes from deep wells,with discharge of 7.5 liters / second. Installing a water tank roof is planned with the use of dirty water while using aseparate system. Installation path using the gravitational system of pipes and pumps with a slope of 1.5 to 5%. Showerpressure ± 1bar each sanitary appliance, according to the height of each floor of shower pressure greatly affect theinstallation path through the line shaft. Tank capacity of 11m3 and reach the bottom of the tank capacity reached 17.02m3. Total discharge at the pump boster used depending on the requirement that reached its peak hours of 2.44 liters /second. Vertical pipe is planned by using wet vendors, system vendors directly and dirty water which flowed into a septictank space. Sewerage can be calculated using the average value of the number of residents who use potable waterfacilities have been planned to reach capacity of 100.38 liters / day.
Formasi Gas Buang Pada Pembakaran Fludized Bed Sekam Padi I Nyoman Suprapta Winaya; I Nyoman Gede Sujana; I G N P Tenaya
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Fluidized Bed Combustion is the best technology for energy conversion of various fuel types such as biomass andwastes with low caloric content fuel. Biomass like rice husk has a great potentiality to develop as a fuel since the availability inIndonesia is abundant. This research aims to analyse gas emission from rice husk using fluidied bed combustion. Investigationwas conducted in a laboratory scale fluidized bed unit by varying operation temperature and gas fluidization. The results showthat emission gas of carbon monoxide and NOx at higher temperature of 600 0C was found lower compared to 500 0C at similarair velocity of 0.05 m/s.
Analisa Performansi Sistem Air Conditioning Mobil tipe ET 450 dengan Variasi Tekanan Kerja Kompresor Adi Purnawan; Suarnadwipa -; I K.G. Wirawan
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Comfort and coolness when traveling by vehicle especially car is highly needed. So many attempts have been made byhumans that comfortable traveling by car can be achieved. One of the effective ways in which comfortable traveling by car can beobtained is by installing air conditioning. The performance of air conditioning system is highly influenced by how the compressorworks. In other words, the pressure resulting from the suction highly determines the performance of air conditioning system,which then affects how the compressor works, the compressor power, the refrigeration effect, the efficiency of isentropic andcoefficient of performance (COP) of the car air conditioning sytem especially that of the car air conditioner type ET 450. Fromwhat has been described above, the writer would like to conduct a research entiled “ Analysis of the Performance of the Car AirConditioning system Type ET 450 with Variation of the Compressor Pressure”.The test was conducted on the car air conditioner type ET 450 with variations of suction 2.8 bar, 3 bar, 3.2 bar, 3.4bar, 3.6 bar and 3.8 bar. The data were obtained from the pressure of compressor output (P2), the temperatures in each point areT1, T2, T3, T4, the compressor rotationn is n, the strength of electrical current is I, and the volumetric flow rate. The data werethen processed and analyzed so that so that the performance of each variation of the suction could be actually and theoreticallyobtained.The findings show that the bigger the suction, the bigger the performance of the car air conditioner type ET 450 wouldbe. The theoretical coefficient of performance (COP) produced was bigger than the actual COP. The optimal COP took placewhen the suction was 441.325 kPa, the actual COP was 3.513177 and the theoretical COP was 3.632062
Analisis Performansi Sistem Pendingin Ruangan Dikombinasikan dengan Water Heater I Gusti Agung Pramacakrayuda; Ida Bagus Adinugraha; Hendra Wijaksana; Nengah Suarnadwipa
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Pada umumnya AC Window digunakan untuk mengkondisikan udara ruangan agar berada pada kondisi udara yang diinginkan.Panas pada kondensor dapat dimanfaatkan untuk fungsi yang lain sehingga tidak ada panas yang terbuang percuma.Memodifikasi AC Window dengan penambahan tabung pemanas air bertujuan untuk memanfaatkan panas yang akan dibuangkondensor menuju lingkungan untuk memanaskan air.Tabung Pemanas dipasang pada Penelitian dilakukan dengan melihat pengaruh penambahan suatu tabung pemanas air terhadapCOP (Coefficient of Performance), laju pendinginan ruangan, serta laju pemanasan air dalam tabung pada AC Window.Dari hasil penelitian yang dilakukan, didapat hasil bahwa COP AC Window dengan penambahan tabung pemanas mengalamipenurunan sebesar 0,3369 kJ/s, serta penurunan pada laju pendinginan ruangan sebesar 0,002 kJ/s. sedangkan untuk lajupemanasan air pada tabung didapatkan sebesar 0,0688 kJ/s
Studi Struktur mikro Silikon dalam Paduan Aluminium-Silikon pada Piston dari Berbagai Merek Sepeda Motor Tjokorda Gde Tirta Nindhia
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

This research introduce microstructure of silicon in aluminium-silicon alloys that were collected from varietymanufacture company that available in Indonesia such as Vespa, Suzuki, Kawasaki, Honda, and Yamaha. The microstructureobservation was conducted followed standard metallurgy test for aluminium. The result is presented in the form of metallographicfrom each specimen followed by literature study to obtain information regarding process and its properties related withapplication as a piston. It is revealed from this observation that the microstructure of silicon was found vary depend on whichcompany it’s coming from. The primarily differences were found from the silicon size and the texture. These differences makeeach piston having its own characteristic and properties that make it different one another related to wear resistance
Second Law Of Thermodynamics Analysis Of Triple Cycle Power Plant Matheus M. Dwinanto
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Triple cycle power plant with methane as a fuel has been analyzed on the basis of second law of thermodynamics.In this model, ideal Brayton cycle is selected as a topping cycle as it gives higher efficiency at lower pressure ratio comparedintercooler and reheat cycle. In trilple cycle the bottoming cycles are steam Rankine and organic Rankine cycle. Ammoniahas suitable working properties like critical temperature, boiling temperature, etc. Steam cycle consists of a deaerator andreheater. The bottoming ammonia cycle is a ideal Rankine cycle. Single pressure heat recovery steam and ammoniagenerators are selected for simplification of the analysis. The effects of pressure ratio and maximum temperature which aretaken as important parameters regarding the triple cycle are discussed on performance and exergetic losses. On the otherhand, the efficiency of the triple cycle can be raised, especially in the application of recovering low enthalpy content wasteheat. Therefore, by properly combining with a steam Rankine cycle, the ammonia Rankine cycle is expected to efficientlyutilize residual yet available energy to an optimal extent. The arrangement of multiple cycles is compared with combinedcycle having the same sink conditions. The parallel type of arrangement of bottoming cycle is selected due to increasedperformance.
Balance of Transient Thermal Energy on the Forced Flow Rotary dryer Made Ricki Murti
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

There have been many studies about the dryer with a static bed so dry material produced is not uniform. Thus, drying withrotating bed can produce the dry material uniformly. Usually a prototype closest to the efficiency of the system as aperformance, but it has not been able to show its thermal energy balance. So the target of this research is a transient thermalenergy balance. Data taken in the testing include: the temperature inlet fluid of drying chamber channel (Tin), the velocity offluid flow into drying chamber channel (V), the outlet fluid temperature from drying chamber channel (Tout), the temperatureof dried material (Tmtl), the mass of dried material (mmtl), the surface temperature in the drying chamber wall (Tdlm), surfacetemperature out the drying chamber wall (Tluar). Next step is to get the results of data processing in the form of transientthermal energy balance in tables and graphs. From the results it can be seen that the useful energy decreases with timealthough the incoming energy drying system increased slightly. From the energy balance of thermal performance is obtainedalso in the form of thermal efficiency and average thermal efficiency is 18%. Decrease in useful energy as a function of time,causes the thermal efficiency as a function of time was also decreased, it is characterized by a decrease in the mass ofmaterial because the condition is getting dry.

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