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Jurnal Energi Dan Manufaktur
Published by Universitas Udayana
ISSN : 23025255     EISSN : 25415328     DOI : -
"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 7 Documents
Search results for , issue "Vol 1, No.2 Desember 2006" : 7 Documents clear
Perancangan rasio gigi dan jumlah tingkat kecepatan gigi transmisi untuk mendapatkan kinerja traksi kendaraan yang optimum IGN Priambadi; I Ketut Adi Atmika; IGK Sukadana
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Performa otomotif adalah salah satu aspek penting dalam menentukan daya saing suatu produk otomotif. Salah satu performa yang penting adalah kemampuan kendaraan untuk melakukan percepatan, melawan hambatan angin, melawan hambatan rolling, melawan gaya tanjakan dan kemungkinan untuk menarik suatu beban. Gaya yang timbul pada roda penggerak untuk melawan hambatan tersebut disebut dengan gaya dorong atau gaya traksi. Besar kecilnya traksi untuk setiap tingkat gigi serta kecepatan kendaraan yang mampu dicapai dapat dikendalikan dengan mengatur ratio dan tingkat transmisi. Ratio transmisi berpengaruh terhadap besarnya torsi yang dapat ditransmisikan, sedangkan jumlah tingkat kecepatannya berpengaruh terhadap kehalusan (smoothness) proses transmisi dan transformasi daya pada sistem transmisi tersebut. Untuk mencari perbandingan gigi antara tingkat transmisi terendah dan tertinggi adalah dengan cara progresi geometri. Dasar dari penggunaan metode ini adalah untuk mendapatkan ratio dan jumlah tingkat kecepatan gigi transmisi pada daerah kecepatan operasi mesin yang sama sehingga fuel economy pada setiap gigi akan sama. Modifikasi ratio gigi menghasilkan kurva traksi dimana jarak kurva gigi yang berdekatan semakin dekat. Hal ini menunjukkan kehilangan daya waktu pemindahan gigi transmisi semakin kecil, atau dengan kata lain kinerja traksinya semakin baik. Perancangan ratio dengan pemasangan 6 tingkat kecepatan,menghasilkan kurva traksi dengan jarak antara kurva traksi sengat dekat, berarti kinerja traksinya paling baik.
Studi konsumsi energi sebagai kajian awal untuk mengetahui & memonitor efisiensi penggunaan energi Ainul Ghurri; Ngurah Putra Wibawa; Hendra Widjaksana
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Investigation on energy consumption is early step to monitor energy consumption and efficiency. Assessment on energy consumption is aimed to investigate how much energy has been consumed by a company, a region or a country. The growth of energy consumption can show the economic and welfare improvement. From the total energy consumed we can then break down it to the sectors of energy user, e.g. transportation, industry, commercial building, etc. By comparing the total energy consumed to the benefits of energy consumption we can predict the energy efficiency. This research is still early stage and just covers the energy consumption by Balinese society. The fuel and energy consumption by Balinese society was analyzed based on the data from Pertamina branch Denpasar. It was found that the biggest fuel consumed is solar, followed by premium-premix, minyak tanah, LPG, avtur, and avgas, respectively. During 1998 to 2003 the Balinese’s energy consumption increased gradually with changeable fluctuation from 56.63 Peta Joule to 80.53 Peta Joule. The biggest rise was happened in 1999-2000, i.e. 16.43%, and the lowest rise was happened in 2002-2003, i.e. 0.9%. Transportation was the biggest consumer of the Balinese energy, i.e. 69.21% in 2000 and 71.03% in 2001. In order to investigate the energy efficiency, it was found that the energy users have not been used the energy intensity as indicator yet to measure their energy efficiency. Some no uniformity in data classification and the unavailability data caused this research can’t be conducted more precise and detail yet.
Pengendalian proses pengisian air mineral dengan metode simulasi I Dewa Gede Ary Subagia; IM Dwi Budiana
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Efektifitas proses pengisian air kemasan (bottling system) dipengaruhi oleh beberapa faktor, yaitu terjadinya kelebihan pengisian (overflow), waktu (t), dan slip antara botol dengan rel pemindah (elevator). Penelitian ini bertujuan untuk mengefektifkan waktu proses pengisian air ke dalam botol, dengan metode simulasi. Dalam simulasi dilakukan pemodelan sistem yang dianalisa dengan model matematik, dan sebagai input dalah batasan – batasan dari mesin, yaitu kecepatan rel pengisian, lengan pendorong, debit pengisian, timer pengisian, dan filler head. Proses simulasi yang dilakukan menghasilkan kebutuhan waktu efektif dalam proses bottling dimana dengan memanfaatkan simulasi model dari proses pengisian air mineral diperoleh waktu yang sangat efektif yaitu dengan memperhatikan orientasi batasan yang dibutuhkan dalam proses.
Pengaruh tegangan listrik dan waktu elektroplating Krom keras terhadap ketebalan lapisan Krom I Ketut Suarsana; I Made Rasta; DNK Putra Negara
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Proses pelapisan Krom merupakan proses akhir atau tahap penyelesaian pada kebanyakan pembuatan komponen agar tidak cepat aus, seperti pada poros, pasak, ring piston, silinder, bearing dan crank shaft. Bahan spesimen yang digunakan adalah Baja St 60 (C 0.40%; Mn 7%; Si 0.28%; P+S 0.09%; Fe 98,53%) dengan variasi tegangan listrik 4 volt, 6 volt, 8 volt, dan variasi waktu elektroplating Krom keras 30 menit, 45 menit, 60 menit. Pengujian yang dilakukan dengan pengukuran ketebalan lapisan menggunakan skala foto mikro dan menghitung ketebalan lapisan permukaan .Dari hasil penelitian ditunjukkan bahwa semakin tinggi tegangan listrik (volt) yang di gunakan dan semakin lama waktu pelapisan Krom keras maka semakin meningkat ketebalan lapisannya. Ketebalan lapisan permukaan yang paling tinggi didapatkan pada tegangan 8 volt dengan waktu pelapisan 60 menit dengan ketebalan lapisannya sebesar 89,37 ?m sedangkan ketebalan lapisan permukaan paling rendah didapat pada tegangan 4 volt dengan waktu pelapisan 30 menit ketebalan lapisannya sebesar 20,18 ?m.
Pengaruh unsur Tembaga (Cu) terhadap fluiditas paduan Al-Si 11.8 wt% (ADC 12) dengan metode Vacuum Suction Test Bambang Suharno; Is Prima Nanda; Bustanul Arifin; Demas Seto
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Al-Si 11.8 wt% alloy which classified to eutectic Al-Si composition usually used to produce a flat casting product with high pressure die casting process. Alloying element become an important things to determine behavior and characteristic of aluminum. Copper added into aluminum to improve strength and hardness, but there has no many studies on the effect of copper on fluidity. This fluidity study is using vacuum suction test method and the microstructure is observed with SEM/EDS. Spectrometer test has been used to find out chemical composition of sample. The result of this study shows that with copper addition from 2.25 wt% to 3.11 wt%, the fluidity value has increased 24.11% on 680oC pouring temperature. On 3.11 wt% copper composition, fluidity value has increased 14.38% from 640oC pouring temperature to 700oC pouring temperature.
Unjuk kerja kolektor surya pelat datar dengan variasi ketinggian sirip (L/Lf) pada pelat absorber Amrizal -
Jurnal Energi Dan Manufaktur Vol 1, No.2 Desember 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The main objective of this research is to know how far the influence of the addition of continuous longitudinal fins on enhancing the performance of solar collector. The addition of continuous longitudinal fins to the bottom side of the absorber plate using fin ratio (L/Lf) =2; 1.3; 1 increases the heat transfer and pressure drop. Optimization is done to get the optimum heat transfer and low difference of pressure drop. By experimental study, this present research shows that fin ratio ( L/Lf ) =1 is the optimum condition which give the average efficiency of 53 % and pressure drop of 2,97 N/m2. Comparing this result with fin ratio (L/Lf) =2 and 1.3 we can see the pressure drop has not increased significantly from 2.97 to 3.3 N/m2.
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

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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.

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