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Yanuar Burhanuddin
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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 8 Documents
 1 
Search results for , issue "Vol 5, No 1 (2014)" : 8 Documents clear
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
Implementasi Sistem Gasifikasi untuk Pengeringan Biji Kopi Arinal Hamni
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Sebagai salah satu daerah produksi kopi, Provinsi Lampung telah menjadi sentra pengelolaan kopi, yang terbentang sepanjang bukit barisan.  Dua kabupaten penghasil kopi adalah Kabupaten Lampung Barat dan Tanggamus, yang rata-rata produksinya mencapai 1,2 ton setiap 1 hektar lahan perkebunan Proses pengolahan kopi terdiri dari pengolahan primer maupun sekunder, yang mana pada tahap primer proses pengeringan adalah proses yang paling penting. Oleh karena itu, untuk perbaikan proses pengolah kopi biji menjadi biji kopi kering yang berstandar dilakukan dengan introduksi teknologi pengering sistem gasifikasi yang dikombinasi dengan alat penukas kalor. Udara yang masuk ke ruang pengering adalah udara segar (bersih) yang terbebas dari efek pembakaran. Alat pengering  sistem gasifikasi ini dapat menghasilkan suhu di dalam ruangan melebihi 50°C, kondisi ini sudah lebih baik untuk proses pengeringan jika dibandingkan dengan proses pengeringan yang dilakukan secara hamparan di atas tanah atau semen. Suhu masih bisa ditingkatkan dengan pengaturan kecepatan dan jumlah udara panas yang dialirkan ke ruang pengering. Sedangkan reaktor gasifikasi mampu menghasilkan suhu tinggi pada pipa keluar reaktor yaitu sekitar 350 °C. Penyaluran uadar panas ke alat penukar kalor akan pemanaskan udara di dalam pipa kecil penukar kalor.  Udara panas bersih di dalam pipa kecil yang disalurkan ke dalam ruang pengering dapat mencapai suhu 55 °C.Keywords: pengering, gasifikasi, kopi, reactor,penukar kalor.  
Water Hammer Press Untuk Pengurangan Kadar Air Komoditas Onggok Yudi Eka Risano
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Sumber daya agrikultur yang besar yang dimiliki Provinsi Lampung, khususnya singkong yang menjadi bahan baku tepung tapioka. Ampas dari produksi tepung tapioka ini disebut onggok. Onggok dapat dimanfaatkan sebagai bahan baku obat nyamuk bakar, pupuk, pembuatan saus, dan campuran kerupuk, serta pakan ternak. Sebagai bentuk pemberdayaan masyarakat, industri-industri tersebut memberikan onggok tersebut secara gratis atau dijual sangat murah dalam kondisi basah. Untuk meningkatkan nilai ekonomi dari onggok, para petani melakukan pengelolahan onggok secara tradisional dengan cara menjemur onggok menggunakan panas matahari di hamparan tanah lapang. Proses pengeringan ini sangat tergantung pada faktor cuaca. Jika hujan, kualitas onggok menjadi menurun dan kadar air menjadi tidak terkontrol serta warnanya menjadi kecokelatan yang menyebabkan harga onggok jatuh. Untuk mendapatkan hasil yang maksimal, sebelum dikeringkan ada baiknya onggok yang memiliki kadar air 81-85% tersebut diturunkan kadar airnya hingga 20-25%. Penurunan kadar air tersebut dapat dilakukan dengan cara penempaan. Proses pengempaan dapat dilakukan dengan berbagai cara yaitu: screw press, injection press dan filter press. Bagaimanapun harga Screw press sangat mahal dan memerlukan daya listrik besar serta perawatan yang mahal. Meskipun menggunakan generator tetap membutuhkan bahan bakar yang akan memberatkan petani. Injection press dan Filter press juga harganya mahal dan memerlukan daya listrik besar serta perawatannya mahal.Salah satu proses penempaan yang ramah lingkungan dan hemat energi serta ekonomis untuk meningkatkan kuantitas dan kualitas hasil pengeringan onggok ini dapat dilakukan dengan menggunakan energi air jatuh yang menekan hammer sehingga dinamakan water hammer press. Keunggulan Water hammer press  ini ramah lingkungan, mudah dibuat, peralatannya murah, tidak membutuhkan biaya bahan bakar, serta perawatannya mudah dan murah. Teknologi Water Hammer Press ini mampu mereduksi kadar air onggok hingga onggok berkadar air sebesar 52% dengan kuantitas air umpan sebesar 60 liter dan onggok umpan sebesar 5 Kg serta ketinggian air jatuh umpan yang digunakan pada pengujian water hammer press ini sebesar 3 (tiga) meter.Kata kunci :  Onggok singkong, Kadar air, Water Hammer Press
Studi Pengaruh Fraksi Volume dan Susunan Serat Terhadap Kekuatan Tarik dan Bending Komposit Resin Berpenguat Serat Rotan (Calamus Trachycoleus) Hendri Hestiawan
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

       Use of natural fiber composite material started being developed in the manufacturing industry. Progress is due to the composite nature of the privilege of the composite itself, such as: has a low density, capable of biodegradable, recyclable, has good mechanical properties, and can be renewed because it comes from nature. This research aims to determine the effect of fiber volume fraction and the composition to the tensile strength and bending strength on rattan fiber reinforced composites.The research material is rattan fiber, epoxy resin and catalyst methyl ethyl ketone peroxide (MEPOXE). Shape of the specimen based on the ASTM D3039 standard for tensile test and ASTM D790-03 for the bending test. Research specimens varied in aggregate form filler fibers are straight, cross, and random with fiber volume fraction of 10%, 20%, 30%, and 40%. Manufacture of specimens using hand lay-up method. To determine the mechanical properties of the material bending test and tensile test and photo macro structure.The results showed that the addition of fiber volume fraction resulted in an increase in tensile stress and bending. The highest tensile stress occurs on the fiber volume fraction of 40% with a straight fiber composition of 31.21 MPa. The highest bending voltage obtained at 40% fiber volume fraction and the fiber composition of the cross of 194.12 MPa. Observations of macro structure indicate that fracture surface is relatively flat and shiny indicating that the rattan fiber reinforced composites are brittle. Keywords: Composites, the rattan fiber, volume fraction, fiber composition, epoxy resin
Pengaruh Variasi Normalitas NaOH pada Aktivasi Basa-Fisik Zeolit Pelet Perekat terhadap Prestasi Sepeda Motor Bensin 4-Langkah Herry Wardono
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

          Natural zeolite is an alternative adsorbent. It needs firstly to  be activated before using it as absorbent in order to get zeolite with high adsorption capacity. Previously, the use of pelletized zeolite activated by NaOH-physic and KOH-physic with varied normalities was only performed in a diesel engine to observe the engine performance.In this study there were two kinds of activation, that is  chemical activation with NaOH activator variation on the normality of 0.25 N, 0.5 N, 0.75 N, and 1.0 N and physical activation with using  a temperature of 220 °C for 2 hours. All are made in the form of adhesive zeolite pellets with a diameter of 10 mm and a thickness of 3 mm. From the test results and analysis showed that the use of chemically activated zeolite can improve the performance of 4-stroke petrol engine when compared without using  zeolite. The best performance in this experiment obtained at the normality of 0,75 N. At road test, the pelletized zeolite can reduce the fuel consumption 23, 15 %, and 16,51 % at stationary test, and increase acceleration by 14,77 %.Keywords: zeolite adsorbent, variation of normality, activator of NaOH
Studi Potensi Pembangkit Listrik Tenaga Mikrohidro (PLTMH) pada PDAM Way Sekampung Kabupaten Pringsewu Agus Sugiri
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Electrical energy has become a part of our lives. Even, for some people has become the primary requirement that can’t be eliminated. This can affect the sources of energy used in the process of power generation. Therefore, the presence sources of renewable energy is needed to increase the energy supply for the community. In this case, authors tried to do some research to harness the flow of water in the PDAM Way Sekampung pipe as micro hydro power plant (MHP) The advantage of making the MHP's pipeline PDAM isn’t need for the manufacture of civilian buildings by making MHP is only by utilizing the existing water flow in a pipeline, so the production cost can be reduced. Moreover, can give an idea on the PDAM and the public that the pipeline PDAM that had been used only as a water distribution, can be used as power plant. The purpose of this study was to determine the discharge and head PDAM pipelines and then dimensional turbine design based on the potential obtained. The survey was conducted to obtain primary data and secondary data. The primary data is data acquired directly, while secondary data is the data obtained from documents stored on PDAM Way Sekampung. From the research, discharge obtained an average of 46.287 L/s in normal conditions, and have the water level (head) of 5,998 m from the location of the turbine. The potential of the PDAM Way Sekampung, can generate power of 2,057 Kw. Results dimensional turbine design based on primary data or the direct retrieval, turbine shaft diameter 20 mm, 239 mm runner diameter, blade length 212 mm, a thickness of blade 1 mm and blade number 20.Keywords: Energy, Potential, Micro hydro, cross-flow turbine
Pengaruh Perlakuan Alkali terhadap Kekuatan Tarik Serat Tandan Kosong Kelapa Sawit untuk Digunakan pada Komposit Serat Tkks Harnowo Supriadi
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Empty Palm bunches (TKKS) is one of the solid waste generated by industrial palm oil plantations which contain lots of fiber and is one of the natural fiber source that the availability of abundant in Indonesia, especially in the province of Lampung. TKKS fiber can be used as an alternative amplifier to composite materials. This research was conducted to determine the influence of the chemical composition of TKKS fiber and know the tensile strength from TKKS fiber by doing a tensile test. Alkaline treatment NaOH 5% given to fiber to separate lignin and contaminants that contained in fiber so that it can increase the tensile strength fibers. TKKS fiber is obtained processing palm oil factory by the process of boiling oil palm fresh fruit bunches with a pressure of 2.5 until 3atm at temperature 1300C during 50 – 60 minutes. TKKS already parsed and then selected and measured with a length of 6 cm and a diameter of 0.2 mm. And then given an alkaline NaOH 5%. In this research on the treatment of alkaline NaOH 5% provided that treatment during 0 hours (without treatment), 2 hour, 4 hour, 6 hour. Results from the study found that fiber tensile strength affected by the chemical composition on the fiber, the higher the tensile strength of the cellulose content is increasingly high. Tensile strength in fiber with alkali treatment 2 hours of 0,03528 Mpa, 0,3996% strain,   0,088288 MPa elasticity modulus, if compared with  fiber without alkali treatment of 0,018946 MPa tensile strength, 0,2056% strain, 0,092149 MPa elasticity modulus. This is due to the levels of cellulose fibers with alkali treatment 2 hours increased by 58,2808%, if compared with  fiber without alkali treatment by 13,2848%.Keywords : TKKS fiber, the treatment of alkaline, chemical composition.
Identifikasi Nilai Kekasaran Permukaan pada Pemesinan Paduan Magnesium Gusri Akhyar Ibrahim
JURNAL MECHANICAL Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

The using of magnesium alloy, as alternative to iron and steel, is becoming more popular in the manufacturing industries. Magnesium and its alloys were classified as lighter material and also available in a quite large quantity in this world. Some of machined componens, included automotive and aerospace componens were produced by cutting, which is known as machining process. The machining process done in several conditions doe to the pharamater or factor in machining process. The main factors in machining process are  feed rate, cutting speed, machining condition and deep of cutting. The purpose of this research is to investigate the influence of cutting pharameter to the surface roughness of magnesium, when machined using milling process and supplied with cooling air from vortex tube cooler. Cutting pharameters  used in this research are feed rate and cutting speed. Feed rate used was three levels, those are 0,15 mm/rev, 0,20 mm/rev, and 0,25 mm/rev. Cutting speed used also three levels, those are 23,18 m/min, 32,15 m/min and 42,7 m/min. Cooling air is released from vortex tube cooler with 15 oC of temperature. The result of this research is found that feed rate affected signicantly on surface roughness value. The surface roughness value increased with increasing of the feed rate level. An other han, the surface roughness  value is also affected wear on the edge of the cutting tool. The wear on the cutting tool contributed to the changes of  nose radius (become bigger), so increase the surface roughness value.Keywords: magnesium material, surface roughness, milling, cutting pharameter, cooling air.

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