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Gd. H Lt.2 Jurusan Teknik Mesin Fakultas Teknik Universitas Lampung Jl. Prof. Soemantri Brojonegoro No.1 Bandar Lampung
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Jurnal Mechanical
Published by Universitas Lampung
ISSN : 20871880     EISSN : 24601888     DOI : https://doi.org/10.2960/mech
Core Subject : Science, Engineering,
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Mechanical (eISSN 2460 1888 and pISSN 2087 1880), is a peer-reviewed journal that publishes scientific articles from the disciplines of mechanical engineering, which includes the field of study (peer) material, production and manufacturing, construction and energy conversion. Articles published in the journal Mechanical include results of original scientific research (original), and a scientific review article (review). Mechanical journal published by University of Lampung and managed by Department of Mechanical Engineering, Faculty of Engineering for publishing two periods a year, in March and September .
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 234 Documents
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Perancangan dan Pengujian Radiator Tester Skala Laboratorium yang Terintegrasi Pengatur Putaran Mesin dan Hembusan Angin (Regulator Wind Blower ) Ahmad Suudi
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Cooling system in the engine functions as the protector of the machine by absorbing the heat. Heat engine is produced by fuel in the cylinder. The heat is deliberately created to generate energy, but it will cause excessive heat if it is left unchecked (over heating effect). In order to prevent overheating and keep the machine temperature, then it uses radiator. How effective radiator is used can be seen by using a tool called a radiator tester. Therefore, this research was Designed a Trial Radiator (Radiator Tester) Laboratory Scale Which is Completed by Round Handler’s Machine and Regulator Wind Blower on Diesel Engine L 300.This research was done by testing the car L 300 diesel in the field then noted rpm and air speed that blew into the radiator. The process of designing a radiator tester L300 diesel engine laboratory scale were making the framework platform machine, making radiator tester cooling system machine to set up a thermometer in the radiator hose in and out, making a mechanism round handlers machine, making a regulatory mechanism wind blower and installing a trial radiator with round handlers machine and wind blower. The rpm test result and air speed on the field was applied to the radiator tester laboratory scale.From the results of the tests, it showed that there was an increase in value of the effectiveness of the radiator without external airflow to engine speed 1000 rpm and the average value was 0.483. Whereas, there was a decrease on the effectiveness of the radiator when given outside air flow 2.3 m / s at 1500 rpm engine speed, which was 0.63.Keywords: Effectiveness, Radiators, Temperature, Air Flow
Kaji Eksperimental Pengaruh Pemasangan Photovoltaic Pada Dinding Bangunan Terhadap Temperatur Ruangan M. Dyan Susila; A. Yudi Eka Rosano; Mei Hartanto
JURNAL MECHANICAL Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v6.i1.201501

Abstract

Daerah perkotaan banyak sekali gedung bertingkat baik untuk perkantoran maupun pusat bisnis, dengan model dinding beton maupun  kaca. Bagian bangunan secara umum mendapat sinar matahari baik secara bergiliran maupun terus menerus sepanjang siang hari. Penyinaran tanpa hambatan ini akan meningkatkan kalor yang masuk ke dalam ruangan dan beban pendingin ruangan akan meningkat, sehingga konsumsi energi listrik juga akan bertambah. Salah satu upaya mengatasinya dengan pemasangan photovoltaic. Untuk mengetahui pengaruh pemasangan PV terhadap temperatur ruangan dilakukan kajian eksperimental dengan mensimulasikan intensitas berasal dari cahaya lampu ultrasonik. Penelitian ini dilakukan pada model bangunan, dimana PV dipasang pada dinding dengan sudut pemasangan 150  dan posisi lampu penyinaran dengan sudut 00, 300, dan 600. Parameter yang diuji adalah temperatur PV, temperatur luar dan dalam dinding serta temperatur ruangan. Hasil pengujian ini akan dibandingkan dengan variasi intensitas cahaya lampu yakni 500 watt dan 1000 Watt. Hasil penelitian memperlihatkan bahwa pemasangan PV pada dinding bangunan dapat memperlambat kenaikan temperatur ruangan. Pemasangan PV dengan posisi miring, memberikan pengaruh positif terhadap pengurangan laju pemanasan ruangan.Kata Kunci: photovoltaic, temperatur, intensitas cahaya
Pengujian Orifice Flow Meter dengan Kapasitas Aliran Rendah Ainul Ghurri; S.P.G. Gunawan Tisna; Syamsudin Syamsudin
JURNAL MECHANICAL Vol 7, No 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v7.i2.201610

Abstract

Orifice flow meter is used in many laboratory and industrial application due because of its simple design and low cost. The present research investigated an orifice flow meter operated in relatively low flow rate. Orifice plate is a metal plate, 10 mm width provided with bevel at inlet section. The diameter ratios (β) are 0.3, 0.4, 0.5, 0.6, 0.7, and 0.8, respectively. The experiment used water with flowrate range having Reynolds number between 6827,55 and 8004,72. The fluid is flown through the orifice plate. Pressure taps are used to measure pressure at upstream and downstream of the orifice plate. The actual capacity is directly measured at an outlet reservoir; while the theoretical capacity is calculated using modified Bernoulli equation with diameter ratio (β) within the equation. The results showed that the irrecoverable pressure drop decreased with the increase of flow capacity and the diameter ratio. The discharge coefficient of the orifice flowmeter ranged between 0.3 and 1.3.
Analisis Konsumsi Energi Listrik Universal Milling Machine Pada Berbagai Keadaan Operasi dan Parameter Pemesinan Dimas Rizky Hermanto; Yanuar Burhanuddin; Suryadiwansa Harun; Gusri Akhyar Ibrahim
JURNAL MECHANICAL Vol 9, No 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v9.i1.201806

Abstract

Penelitian ini dilakukan dengan tujuan melihat pengaruh kondisi mesin dan variasi parameter pemesinan terhadap konsumsi daya listrik mesin frais universal Milko 12. Pengujian pemotongan dilakukan pada baja karbon SS400 dengan tiga kondisi operasi yaitu kondisi idle, kondisi meja bergerak dan kondisi melakukan pemotongan, dimana pada masing-masing kondisi tersebut dibagi lagi menjadi tiga variasi kecepatan spindel, laju pemakanan, dan kedalaman pemotongan. Penelitian dilakukan dengan menggunakan mesin frais konvensional Universal Milko-12.Hasil penelitian menunjukan bahwa konsumsi daya dan temperatur mesin meningkat seiring waktu proses dan peningkatan kecepatan spindel. Pada kondisi pemotongan, selain peningkatan kecepatan spindel peningkatkan kecepatan gerak meja dan kedalaman potong menyebabkan peningkatan temperatur dan konsumsi daya pemotongan
Studi Kekuatan Sambungan Plat Pada Spot Welding Ditinjau dari Kekuatan Tarik dan Geser Nofriadi Handra
JURNAL MECHANICAL Vol 4, No 1 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

AbstractThis event will be based on research with the desires of the author about what exactly is the appropriate Spot Welding was simply and commonly used in the car industry for the manufacture of karoseri. The purpose of this research is to know the time of good press to perform welding on a particular plate of black and Galvanized plates with a thickness of 1.2 mm Methods of research conducted the first test of the composition, process of making test samples, conduct further testing of welding, pull and slide on each individual plate types, data processing, data analysis, make form conclusions, and making reports. After doing some research and obtained results that is, press time is good at 3.5 seconds on each plate with the current 26 Amper. From the above data can be drawn the conclusion that the press at the time of welding point is very influential to the value of the tensile strength and shearing strength. Because at the time of the electrode to the weld material emphasis will generate heat, thus forming clots, heat process that happens will affect the result of the welding connection. Keywords: Spot Welding, Tensile Strength, Shear Strength, Connection Plates
PERBANDINGAN CAMPURAN BENSIN DAN ETANOL TERHADAP PERFORMA MESIN DAN EMISI GAS BUANG PADA MESIN 2 SILINDER Yos Nofendri; M Fajri Hidayat
JURNAL MECHANICAL Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v10.i2.201906

Abstract

Aditif pada bahan bakar memiliki peran yang sangat penting untuk meningkatkan kualitas bahan bakar. Bahan bakar yang mempunyai kualitas yang baik akan menghasilkan prestasi mesin yang tinggi dan mengeluarkan emisi gas buang yang rendah. Bahan tambah atau aditif yang berbahan dasar nabati juga bisa mengurangkan ketergantungan sumber energy fosil yang semakin lama semakin berkurang. Etanol terbuat dari bahan tumbuh-tumbuhan yang mempunyai potensi sebagai aditif bahan bakar dan dapat mengurangi ketergantungan terhadap bahan bakar fosil. Penelitian ini bertujuan untuk menemukan campuran etanol-bensin yang mempunyai karakteristik yang lebih bagus berbanding bensin biasa yang bisa menaikan prestasi mesin dan menurunkan emisi gas buang. Pada penelitian ini menggunakan metode ekperimental dengan melakukan pencampuran bensin dengan etanol sebanyak 5% dan 10%. Hasil penelitian ini menunjukan bahwa penambahan sebanyak 5% etanol yang mana torsi meningkat sebanyak 12.8 % dan daya mesin meningkat sebanyak 12.6%, Penambahan etanol sebanyak 10% dapat menghemat bahan bakar sebanyak 11.6% dan dapat meningkatkan efisiensi termal sebanyak 12.47%. Pada emisi gas buang terjadi peningkatan jumlah CO2 dan penurunan senyawa CO denga adanya penambahan etanol pada bahan bakar bensin. Aditif etanol dapat memberikan efek yang bermanfaat (Beneficial effect) terhadap prestasi dan emisi gas buang pada mesin bensin.
KARAKTERISTIK ALAT PENGERING PADI SKALA LAB DENGAN MENGGUNAKAN BAHAN BAKAR SEKAM PADI Kms. Ridhuan
JURNAL MECHANICAL Vol 2, No 1 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

The drying process is a stage that is quiteimportant to determine the quality of rice is good, especially the rainy season, so the use ofpaddy dryers (oven) is a must. For the heatsource used fuel waste rice husk obtained fromthe rest of the rice mill. Well as efforts toovercome the energy crisis and environmental sustainability. The purpose of this study is to determine the amount of heat that occurs ineach rack, knowing the rate of decline dryingand knowing the water content of rice and the long drying time. Testing rice dryers done by connecting the oven with a stove burner burningrice husk as a place with a pipe to drain the hotair. In the rice dryer (oven) there is a rack / container  of rice be nested  six and  intersecteach  containing    2 kg  of rice. Hot airenters from below to above the rack 1 to 6 and then to the outer shelf. From the test results is known that the decrease in average water content of 8.875 %, moisture content of grain /rice after drying that is 16.125 %, the drying rate of 0.2695 % / min, the amount of heat received by rice  173.703 J/ kg. The amount of rice husks  are used in a single  drying  1 kg with a time of  60 minutes  and the rice  is dried as much as 12 kgKeywords: drying, oven, rice, husk
Perencanaan Gearboxdan Perhitungan Daya Motor pada Modifikasi Dongkrak Ulir Mekanis Menjadi Dongkrak Ulir Elektrik Ahmad Suudi
JURNAL MECHANICAL Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Manual jackscrew is a lifting device used by automobile drivers when any disorders occur, especially when the automobile tires are deflated. Considering manual jackscrew shape and design, not all people are able to use it easily, especially women. This is the reason of manual jackscrew modification into electric jackscrew.This jackscrew modification is conducted by adding a gearbox and DC motor. The ratio between gearbox input and output is 1 : 44.77 and the DC motor power is 160 Watt – 600 Watt. The electric jackscrew working principle is that rotation from DC motor is reduced by the gearbox and forwarded to screw shaft in the jackscrew. The power source is from the automobile battery. The results of electric jackscrew testing show that time of jacking is 10 seconds for tricycle motorbike, 12 seconds  for Gran Max PU car, and 14 seconds for Mazda Vantrend car,all the data is compared with the data manual jackscrew.Key words: jack, screw, manual, gearbox, DC motor, and electric
Analisis Uji Destructive Dan Non Destructive Terhadap Hasil Sambungan Las V-Tunggal Baja AISI 1045 Nafrizal .
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

This paper reports the result of study on the strength behaviour of welded joint both destructive and nondestructive testing. The parent metal choosen for the testing was AISI 1045 steel with main parameters of single-V welded form and horizontal welding position. The electrodes used for each parameter were AWS E-7016 LB-52 with diameter/amperes of 2.6 mm/80 Amp, 3.2 mm/110 Amp, and 4.0 mm/130 Amp. The specimens were nondestructively tested using the well-known radiography X-ray according to ASTM-1A for detecting welding flaws and its size. Chemical composition test was performed for the material of parent and welding metal. Tensile testing was performed to destructive based on the ASTM E-8 standard  for tensile test. The results show that    the tensile strength of the weld joint is reduction by about 28% compared to the parent metal without welding. The reduction in tensile strength is believed to be caused by welding defect, include porosity, inclusion, incomplete penetration, and reduction in carbon content from 0.5% in parent metal to about 0.1% in the welding region.  Keywords: smaw, tensile strength, welding defect
Perancangan Heat Exchanger pada Binary Power Plant Kapasitas 100 KW yang Memanfaatkan Uap Sisa PLTP Ulu Belu Ahmad Yudi Eka Risano; Ahmad Suudi; Rendy Dwi A.P.
JURNAL MECHANICAL Vol 6, No 2 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v6.i2.201508

Abstract

Binary power plant adalah sistem pembangkitan listrik kedua yang mana fluida panas bumi dimanfaatkan sebagai sumber panas utama pada alat penukar panas. Tujuan dari penelitian ini yaitu merencanakan heat exchanger pada binary power plant kapasitas 100 KW, menghitung dan menentukan dimensi-dimensi tiap komponen dari heat exchanger, mengetahui besar longitudinalstress, circumferential stress dan thermal stress yang terjadi pada heat exchanger. Hasil dari perencanaan yang telah dilakukan menunjukan bahwa dimensi dari heat exchanger yaitu berdiameter 0,5 m, panjang 3,6 m, dan tebal dinding yaitu 9,5 x 10-3 m. Tegangan total yang paling besar yaitu tegangan total arah circumferential yang terjadi pada komponen shell dengan nilai sebesar 163,5 Mpa. Tegangan-tegangan yang terjadi pada tiap komponen lebih kecil dibandingkan nilai tegangan ijin material pada nilai SF 1,5 yang direncanakan. Kata kunci :Binary power plant, Circumferential stress, Heat exchanger, Longitudinal stress, Thermal stress.

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