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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 291 Documents
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Studi eksperimental pengaruh slant angle terhadap peningkatan perpindahan panas pada penukar kalor pipa konsentrik dengan louvered strip insert susunan forward Indra Setyawan; Agung Tri Wijayanta; Tri Istanto
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (938.286 KB) | DOI: 10.36289/jtmi.v11i1.43

Abstract

This study was conducted to investigate the effect of slant angle (α) on heat transfer enhancement in concentric pipe heat exchanger with forward arrangement of louvered strip insert. In this study, louvered strip insert is varied with α = 15o, 20o and 25o. The working fluid in the inner tube was hot water and in the annulus was cold water, with the flows direction were counterflow. Tests were conducted at a Reynolds number (Re) 5300 – 17,500). At 5300 < Re < 17500 the value of Nui in the inner pipe with the addition of louvered strip insert with α = 15o, 20o and 25o increases in the range of 19.04% - 22.86%, 48.09% - 54.83%, and 67.43% - 77.02% compared with Nui of plain tube respectively. At Re 5300 < Re < 17500 The value of friction factor in the inner pipe with the addition of louvered strip insert with α = 15o, 20o and 25o is 1.52, 2.56 and 3.35 times greater than friction factor of plain tube respectively. Heat transfer enhancement ratio with addition of louvered strip insert with α = 15o, 20o and 25o in the range of 1.00 – 1.06, 1.02 – 1.08 and 1.03 – 1.12 respectively.
Perancangan Model Balancing Robot untuk Sarana Transportasi Tenaga Medis M Munadi; Mochammad Ariyanto; Royyan Saputra; Joga D Setiawan
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1159.254 KB) | DOI: 10.36289/jtmi.v13i2.110

Abstract

Robots have become mechanical equipment that can perform physical tasks, either by monitoring or using predefined programs (artificial intelligence). One type of robot is a mobile robot that has a driving mechanism in the form of a wheel and leg so that it can move from one place to another. One type of mobile robot includes balancing a two-wheeled robot and can balance itself to the surface of the earth. In this study, we will try to design a model of balancing robots that in future development can be used in hospitals by medical personnel as an environmentally friendly means of transportation. This is because medical personnel often have to be mobile in monitoring patients. Related to this, so that the model of balancing robot can be balanced, one type of controller is used. The sensor used is the NI myRIO accelerometer sensor to detect angular changes, and the gyroscope sensor to detect angular velocity. In order to balance the model of balancing robot, the Proportional-Integral control method is used to adjust the speed of the DC direction of the rotating motor. Tuning Proportional- Integral control parameters is done by two methods, namely Ziegler-Nichols method and trial and error. The good tuning from Proportional Integral is the gain value Kp = 5 and Ki = 0.001.
Pembuatan dan pengujian turbin propeller dalam pengembangan teknologi pembangkit listrik tenaga air piko hidro (PLTA-PH) dengan variasi debit aliran Henanto Pandu Dewanto; Dwi Aries Himawanto; Sukmaji Indro Cahyono
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1083.684 KB) | DOI: 10.36289/jtmi.v12i2.72

Abstract

Hydroelectric power plants (hydropower) with a power generated capacity of less than 5 kW called "Pico Hydro" (hydropower-PH). Pico Hydro is one of the renewable energy sources that are environmentally friendly. In this study aims to: (1) the manufacture hydropower plants Pico Hydro energy-efficient, renewable and environmentally friendly; (2) determine the efficiency of the turbine with the testing of flow variation; (3) determine the efficiency of generator. Designing and making portable water turbines are easily in the manufacture, operation, and maintenance and has a high efficiency and effectiveness that can use the method of reverse engineering. The production process is performed to create a turbine by the lathe and welding processes. While the materials used are mild steel. Results of this study were found that: (1) the manufacturing process of hydropower plants Pico Hydro can be performed easily by the public; (2) the type of turbine used in hydropower-PH testing is a propeller turbine with 4 blades; (3) flow measurement with V-Notch method showed the following actual debit are 5.38 x10-3 (m3/s), 6.62 x10-3 (m3/s), 7.69 x10-3 (m3/s) and 8.84 x10-3 (m3/s. Turbine efficiency is 3.59 %, 4.26 %, 5.66 % and 7.54 %. The efficiency of the generator has a value of 39.31 %, 40.51 %, 32.55 % and 30.45 %.
Kekuatan Bending Panel Komposit Lamina Berbasis Karung Plastik Bekas (Woven Bag) Heri Yudiono; Samsudin Anis; P Pramono
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.323 KB) | DOI: 10.36289/jtmi.v13i2.93

Abstract

Waste made from plastic, especially plastic sacks has become a national problem because of the intensity of its ever increasing use and the behaviour of the people who are less concerned about the environment, so as soon to find control efforts that are pro-environment, pro-technology and pro-economic. This research aims to analyze the bending strength, modulus of elasticity, and the degree of deflexivity of the lamina composite panels from used plastic sacks as an alternative material which is tough, lightweight, and strong. The research method used was an experimental method with the category of Pre-Experimental Designs type Static Group Comparations. The tests were conducted for the control groups and experimental groups. The experimental group is the group that is treated by varying the orientation of the used woven plastic sack fibers 0°/0°/0°/0°, 0°/+30°/0°/+30°, 0°/+45°/0°/+45°, 0°/+60°/0°/+60° and 0°/+90°/0°/+90°. The control group in this study were specimens that were not treated in the form of bumpers as product controls. The specimens of bending test are using the ASTM D790 standard. The results of the research reveal that the orientation of the fiber affects the bending strength of the lamina composite based on used plastic sacks. The highest bending strength in fiber orientation 0°/+60°/0°/+6°.. is 123.4 N/mm² and the that previous price is 24.96% higher than the bumper bending strength as a product control of 92, 6 N/mm². Debonding occurs on test specimens due to the release of bond in the contact area of the fiber-matrix caused by the shearing forces that the matrix cannot hold.
Redesign runner turbin pembangkit listrik tenaga pico hydro dengan metode reverse engineering melalui pendekatan teoritis Abdillah Zuhud; Sukmaji Indro Cahyono; Dominikus Danardono Dwi Prija Tjahyana
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.216 KB) | DOI: 10.36289/jtmi.v11i2.54

Abstract

Remote area is a geographically isolated area which has a very low accessibility. Most of its area has a low level both population and electrification due to its accessibility is so far from National power grid. The electrical problem in remote area can be solved by building a Pico hydropower. One of the important components of Pico hydro is a runner turbine. Based on theoretical design process that refers to the fixed variable flow rate 25 l/s, head 2 m and number of turbine rotation 1500 rpm then to be obtained outer diameter runner turbine propeller is 0,103 m, hub diameter is 0,515m, number of blade is 4 with flat blade profile, hydraulic efficiency is 76% and it is targeted to raise 490 Watt electrical power.
Produksi bioetanol melalui sistem distilasi nira dari pohon nipah dengan pemanfaatan energi panas kolektor surya Azwar Hayat; Mulyadi .; A. Erwin Eka Putra; Novriany Amaliyah; Muhammad Noor Umar
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (665.217 KB) | DOI: 10.36289/jtmi.v12i1.66

Abstract

Proses distilasi Nira dari pohon nipah sebagai sumber utama bioetanol telah dilakukan dengan menggunakan kolektor surya. Pada penelitian ini, nira yang tanpa memalui proses fermentasi dialirkan di bagian bawah modul kolektor surya untuk menyerap panas secara langsung dari kolektor. Tipe kolektor yang digunakan pada penelitian ini adalah tipe plat datar dengan kaca penutup tunggal. Nira dialirkan didalam pipa tembaga dengan plat aluminium yang telah dihitamkan sebagai plat penyerap panas (absorber). Uji kandungan nira nipah sebelum destilasi menunjukkan kandungan alkohol sekitar 5%, glukosa 0,04%, sukrosa 0,32, abu 0,48% dan sisinya adalah air. Setelah proses destilasi terlihat penurunan alkohol sekitar 1%. Perpindahan panas dari yang terjadi berupa konveksi dan radiasi dari udara luar ke kaca penutup, dari penutup ke udara didalam kolektor, perpindahan panas radiasi dan konveksi dari penutup ke plat absorber telah diperhitungkan. Panas yang berguna untuk proses distilasi dinyatakan sebagai efisiensi aktual sebesar 42,24%, sedangkan untuk efisiensi teoritis sebesar 44,25
Analisis aliran fluida dan insulasi aliran pipa bawah laut menggunakan pipesim Rivandy Fathur Rachman; Rosyida Permatasari
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1002.798 KB) | DOI: 10.36289/jtmi.v13i1.85

Abstract

Black oil production that flows from the reservoir is always affected by water saturation and is a common problem that mainly occurs in the subsea pipeline that can form hydrate compounds. The formation of hydrate compounds in the subsea pipeline is a common problem due to significant temperature drop and thermodynamic changes during production. The problem should be effectively prevented to ensure normal pipeline operation. The purpose of this study is to find out how to reduce the formation of such compounds which can inhibit the transport process in the subsea pipeline through the use of various kinds of insulation material. The types of insulation materials tested are Polyethylene Low-Density (LDPE), Polyurethane (PU), Polypropelene (PP), Polystyrene (PS) and Polytetraflouroethylene filled with Glass (PTFE 25% GF). The fluid flow heat transfer equation in stable condition and mean heat loss is used in PIPESIM software model to analyze the selection of the insulation material required in the prevention of the formation of such compounds occurring within the subsea pipeline. The results stated that the best material of the five insulation materials used is Polystyrene (PS), whereas the worst material is Polytetraflouroethylene filled with Glass (PTFE 25% GF).
Studi implementasi cad/cam pada proses milling cnc terhadap kekasaran permukaan dan tingkat kepresisian aluminium 6061 Risdiyanto Edy Saputro; Indri Yaningsih; Heru Sukanto
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.667 KB) | DOI: 10.36289/jtmi.v11i1.49

Abstract

This research was conducted to find out the influence of the implementationof CAD/CAM for CNC milling process to the surface roughness andprecision. Specimens were made by using seven types of cutting process.There are face milling, pocket milling, profile milling, slot milling, drilling,thread milling, and surface contouring. The results showed that theimplementation of CAD/CAM with a variation of the cutting processproduces roughness value which is lower than without the implementation ofCAD/CAM. The surface roughness values for each of the cutting processwere face milling process (0.5028 μm; 0.5132 μm), slot milling (0.664 μm;0.6556 μm), profile milling (1.282 μm; 1.3128 μm), pocket milling (1.3852μm; 1.4856 μm) and drilling process (1.9944 μm; 2.1136 μm). The averagevalue of the dimensions from the measurement showed the differencebetween the results of the implementation of CAD/CAM and without theimplementation of CAD/CAM. The percentage difference in the length andwidth were respectively 0.037%; 0.059% for profile milling; 0.039%;0.061% for pocket milling; and 0.151%; 0.317% for drilling. Statistical useof the implementation of CAD/CAM does not significantly affect the value ofthe surface roughness but it has a significant influence on the precision ofthe product with a 95% precision level.
Pengujian fixed bed gasifier dengan bahan bakar biomassa Mahardika Azis Mohammad
Jurnal Teknik Mesin Indonesia Vol 14 No 1 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.417 KB) | DOI: 10.36289/jtmi.v14i1.107

Abstract

Currently, the human need for energy is growing larger, due to the increasing population. The dependence on fossil fuels can be seen from Indonesia’s energy usage. Nowadays, energy consumption is dominated by petroleum (46.9%), natural gas (21.9%), coal (26.4%), and other (4.8%). Therefore, to reduce dependence on fossil fuels, biomass can be used as alternative energy which is renewable. In addition, technology required to improve the combustion efficiency is necessary. To convert solid fuel into gas fuel is gasification process. In this research, the downdraft gasification type reactor was tested. In this test, results obtained are CGE (Cold Gas Efficiency) by 41.1% and the gas content of CO2 (2.98%), H2 (2.66%), N2 (66.99%), CO (15.71 %), CH4 (2.98%), H2S (0.15%) with an AFR of 2.47
Perancangan sistem pembangkit kogenerasi pada pabrik gula kapasitas 4.000 tcd, studi kasus revitalisasi pabrik gula modjo sragen Ari Wibowo
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1057.297 KB) | DOI: 10.36289/jtmi.v11i2.61

Abstract

The sugar industry is an industry that supplies its own energy, in which energy is generated from burning biomass in the form of bagasse to produce electricity and steam. This system is referred to as a cogeneration system, meaning the generation of two different forms of energy together from one main energy source. By designing the right generating system, sugar mills have the potential to generate electrical energy greater than the internal requirement, so the excess power that can be transfered into PLN electricity network. The purpose of this research is to design the equipment in cogeneration steam generation system with reference to the energy potential contained in bagasse. The results showed by calculation and design of equipment, the energy potential from the bagasse of 381.818.182 kJ / hour which can produce steam in the boiler as much as 100.000 kg / hour at a pressure of 45 barg 400oC. Than the turbine and generator can convert into electrical energy of 11 MW.

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