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Jurnal Teknik Mesin
Published by Institut Teknologi Padang
ISSN : 20894880     EISSN : 25988263     DOI : https://doi.org/10.21063/jtm
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
JTM is a journal aims to be a peer-reviewed platform and an authoritative source of information. We publish original research papers, review articles and case studies focused on mechanical engineering and other related topics. All papers are peer-reviewed. JTM is managed to be issued twice in every volume (April and October). The Scope of JTM is: Energy Science and Engineering Applied Mechanics and Materials Design, Manufacturing and Product Development Control, Instrumentation and Robotics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 247 Documents
 12   13   14   15   16 
PEMBANGUNAN PEMBANGKIT TENAGA MIKROHIDRO MODEL BAK (PTMMB) PENGGERAK MESIN PENGGILING TEPUNG Asep Neris Bachtiar; Trisna Putra; Hariadi
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.49-58

Abstract

Researchers in this study will make it back first mover cross flow turbines with larger dimensions and construction of different power system compared with the first year of study. Sedative tub built with brick-concrete construction also functions as a pipe or penstok so rapidly or loses pressure loss is relatively smaller. Thus this generation systems dinamakam micro hydro Power Wagon Model (PTMMB) are used as flour grinding machine mover. PTMMB relatively cheaper investment and implementation in the field relatively quickly, all these advantages into solution in accelerating the spread and development of micro-hydro power plant to the next. By utilizing a head of 1.5 m and a discharge of 100 l / s, projected another plant can generate power of 1,272 kW. From the test results show that the data are encouraging real turbine efficiency is 86.5% greater than the efficiency of plan / assumption is 85%, and thus the quality of early mover Cross Flow turbines are built quite satisfactory and can be proud of. Generating system efficiency measured above 70% which is 76.1% and the productivity of grinding machine at 100% valve opening position is 50 kg / h, which is quite large productivity is very helpful in increasing the production of grinding
PENGARUH WAKTU PENGERINGAN DENGAN PENAMBAHAN 5% BERAT FLY ASH MELALUI DAYA SERAP AIR DAN UJI DENSITAS PADA PEMBUATAN PAVING BLOCK Nurzal; Wendo Febri Putra
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.59-67

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh waktu pengeringan dengan penambahan 5% berat fly ash melalui uji daya serap air dan densitas pada pembuatan paving block serta menentukan kwalitas/mutu berdasarkan SNI 03-0691-1996. Fly ash yang digunakan berasal dari sisa pembakaran batubara pada pembangkit listrik tenaga uap dari Sijantang Sawahlunto. Pertambahan jumlah produksi fly ash menyebabkan dampak negatif pada lingkungan, sehingga salah satu solusi untuk mengatasi dampak tersebut adalah dengan cara memanfaatkan fly ash untuk campuran paving block. Paving block merupakan produk bahan bangunan dari semen yang digunakan sebagai salah satu alternatif penutup atau pengerasan permukaan tanah. Paving block dikenal juga dengan sebutan bata beton (concrete block) atau cone blok. Komposisi fly ash pada pembuatan paving block yaitu sebesar : 0 % dan 5 % berat fly ash + material paving block (semen dan pasir) dengan variasi waktu pengeringan: 7, 14, 21, 28 dan 35 hari. Bentuk spesimen uji berdasarkan SNI 03-0691- 1996 dengan ukuran paving block 20 cm x 10 cm x 6 cm. Hasil penelitian menunjukan bahwa penambahan 5% berat fly ash menghasilkan daya serap air dan densitas lebih tinggi jika dibandingkan dengan 0% berat fly ash. Daya serap air optimal terjadi pada waktu pengeringan 21 hari dan densitas yang dihasilkan semakin rendah. Berdasarkan nilai Daya serap air yang dihasilkan menurut SNI 03-0691-1996, Semua paving block termasuk dalam mutu A yang digunakan untuk jalan.
KAJI EKSPERIMENTAL UNJUK KERJA PENGERING DEHUMIDIFIKASI TERINTEGRASI DENGAN PEMANAS UDARA SURYA UNTUK MENGERINGKAN TEMULAWAK M. Yahya
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.68-74

Abstract

Tujuan penelitian ini adalah merancang, membuat dan menguji pengering dehumidifikasi terintegrasi dengan pemanas udara surya untuk mengeringkan temulawak. Pengering ini terdiri dari beberapa komponen utama yaitu: dehumidifier, pemanas udara surya, ruang pengering dan blower. Dehumidifier mempunyai daya 1 kW dan terdiri dari beberapa komponen utama yaitu evaporator, kondensor, kompressor dan katup ekspansi. Pemanas udara surya jenis plat datar bersirip aliran dua-pass, dan luas 3,6 m2 . Aspek yang ditinjau pada unjuk kerja pengering adalah COP dehumidifier, waktu pengeringan, SMER dan efisiensi termal pengering. Dari hasil pengujian diperoleh: COP dehumidifier sekitar 2,17, waktu yang diperlukan untuk mengeringkan temulawak sebanyak 30,7 kg dengan kadar air awal 80% hingga kadar air akhir 7,5% pada temperatur dan kelembapan relatif udara rata-rata 57,9oC dan 20,29% , dan intensitas matahari rata-rata 871,4 Watt/m2 selama 8,5 jam. SMER maksimum dan rata-rata yang dicapai, masing-masing sebanyak 0,83 kg/kWh dan 0,55 kg/kWh, efisiensi termal pengering maksimum dan rata-rata diperoleh, masing-masing sebanyak 58,36% dan 36.04%. Dari hasil pengujian disimpulkan bahwa pengering dehumidifikasi terintegrasi dengan pemanas udara surya mampu mengeringkan temulawak dengan cepat, efisiensi termal cukup tinggi, dan pengering ini sesuai untuk mengeringkan temulawak (bahan yang sensitif terhadap panas) karena suhu pengeringan tidak melebihi suhu udara yang diizinkan.
ANALISIS PERILAKU DINAMIK SISTEM POROS-ROTOR 3D Asmara Yanto; Rachmat Hidaya
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.75-83

Abstract

In the system of rotating shaft-rotor, vibration problems often occur. Therefore, in order vibration spectrum analysis can be performed with good and safe operating speed limits can be determined properly, then the information on the natural frequency and critical speed of shaft-rotor system must be known well too. Natural frequency of the rotor-shaft system depends on the speed of rotation. In this study we analyzed the dynamic behavior of a shaft-rotor system model by using 3D finite element method and direct method. The analysis was performed to obtain the critical rotation rates and visualizing mode shapes of the shaft-rotor system model 3D. Here, shaft-rotor system model consists of a 3D multi-storey shaft which is divided into 48 elements, two rivet shaft bearings, two disks, each of which is divided into 12 elements. Shaft speed in RPM varied from 0 to 24000 RPM with 100 RPM intervals. For each rotation axis arranged mass matrix, damping matrix, and stiffness matrix systems using the finite element method. The price of natural frequency and mode shape vector price is determined by using the direct method. From the analysis that has been done, the natural frequency obtained 96 forward and 96 backward natural frequency. For 2 pieces of personal frequencies forward and 2 backward the first natural frequency obtained 7 pieces of critical shaft rotation rates. From the visualization mode shape for the first 4 rounds of the critical mode shape obtained at the first natural frequency is equal to the forward mode shape at the first natural frequency and the backward mode shape at the second natural frequency is equal to the forward mode shape at the second natural frequency backward. From the visualization mode shape for 3 rounds last critical mode shape obtained in 2 pieces forward of the first natural frequency and mode shape on the same 2 pieces of the first natural frequency equal backward.
PENGARUH VARIASI KOMPOSISI KOMPOSIT RESIN EPOXY/SERAT GLASS DAN SERAT DAUN NANAS TERHADAP KETANGGUHAN Hendriwan Fahmi; Nur Arifin
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.84-89

Abstract

Fiber of pineapple leaf as one of the natural fiber which is very abundant availability at this time, but is no longer used and disposed of as waste. Though pineapple leaf fiber can be used as a natural alternative to fiber composite materials. The purpose of this study was to determine the effect of variations in the composition of the composite epoxy / glass fiber and pineapple leaf fiber on impact toughness, and also can utilize waste pineapple leaf fibers. Pineapple leaf fiber combined with glass fibers in order to obtain optimum strength and toughness. Variation of weight percent composition of the composite is 90:10, 80:20, 70:30, 60:40. The process of manufacture of the specimen is done manually and stirring pineapple leaf fiber and glass fiber with resin done evenly and constantly. Pouring resin into the mold do without the absence of pressure. Of the results impact test be obtained impact energy and price of impact average for the composite with composition 90:10 = 0.12 J for impact energy and for price impact 0.003 J/mm2 , 80:20 = 0.0013 J for impact energy and price impact 0.0033 J/mm2 , 70:30 = 0.32 J for impact energy and price impact of 0.008 J/mm2 , 60:40 = 0.31 J for impact energy and price impact 0.0077. Toughness is highest obtained on the 70:30 composition. From the test results it can be concluded that the natural fiber – reinforced composites and glass fiber can improve the toughness in the shock loads
PERENCANAAN PEMBANGUNAN SISTEM PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) DI KINALI PASAMAN BARAT Sulaeman; Ramu Adi Jaya
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.90-96

Abstract

Seiring dengan perkembangan peradaban manusia, tingkat kebutuhan energi juga semakin meningkat dan mengakibatkan menipisnya bahan bakar fosil sebagai sumber energi utama. Oleh karena itu diperlukan energi alternative yang terbarukan. Sungai Batang Kularian Kinali Pasaman Barat mempunyai potensi daya yang dapat dimanfaatkan sebagai sumber energy yang terbarukan. Pembangkit listrik tenaga mikro hidro (PLTMH) merupakan salah satu bentuk energi alternatif yang mengolah energi potensial air berubah menjadi energi listrik yang berguna untuk kebutuhan hidup masyarakat. Perencanaan PLTMH dimulai dari survey lokasi perencanaan di Sungai Kularian Kinali Pasaman Barat. Survey dilakukan untuk mendapatkan data perancangan berupa head dan debit air. Data tersebut dapat digunakan untuk menentukan besarnya potensi energi pada lokasi perencanaan PLMTH. Pada perencanaan PLTMH di Sungai Kularian Kinali Pasaman Barat diperoleh data debit air seluruhnya 0,4 m3 /s dan potensi energi listrik sebesar 25 kW. Perencanaan pipa penstock menggunakan pipa berdiameter 500 mm.
PENGARUH PERLAKUAN PANAS BAJA AISI 1029 DENGAN MEDIA PENDINGIN AIR DAN OLI TERHADAP KEKUATAN DAN KEKERASAN Nofriady Handra; Rio Fernando
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.97-100

Abstract

The process of heat treatment is a combination of the operation of heating and cooling with certain speed and was conducted on metal or alloyed in the solid state as an attempt to acquire the nature of certain properties. The temperature of the warming is done for 7850C and 8200C. As for the purpose of this research is to find out how the mechanical properties of steel heat treatment at different temperatures and then to find out the value of the strength and hardness of steel with optimal cooling water and oil media. research methods used are experimental methods, experimental group consisted of samples which have been subjected to heat treatment which is pull-test sample amounted to 13 sample afterward for comparison is 3 samples. How does the difference in strength and violence that occurred after the heat treatment was given with water cooling and oil media against material that had not been given the treatment. From the test results and calculations made on the influence of heat treatment of Steel AISI 1029 with water cooling and oil mediums of the strength and hardness, the highest strength values found in the samples that were given a heat treatment at a temperature of 8200C with the value of the strength value then Mpa 972 highest violence also occurs in the sample who were given preferential treatment at a temperature of 8200C with 299 VHN
RANCANG BANGUN MINIATUR TURBIN ANGIN PEMBANGKIT LISTRIK UNTUK MEDIA PEMBELAJARAN Ruzita Sumiati; Aidil Zamri
Jurnal Teknik Mesin Vol 3 No 2 (2013): Jurnal Teknik Mesin Vol.3 No.2 October 2013
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2013.v3.i2.1-8

Abstract

Wind turbines convert the kinetic energy in wind into clean electricity. When the wind spins the wind turbine's blades, a rotor captures the kinetic energy of the wind and converts it into rotary motion to drive the generator. Wind electric systems are one of the most cost-effective home-based renewable energy systems with zero emissions and pollution. Many factors that influence the performance of wind turbines such as wind speed, blade shape, and number of blades. In Generator, Coil number of turn (N) also influence performance of wind turbine. Manufacture of wind turbine prototype as a learning medium to facilitate students in understanding the concept of wind electric system. Results of the test prototype wind turbine if the wind speed the greater the resulting voltage will be higher, the Coil number of turn (N) also affects the voltage generated.
STUDI PENGGUNAAN KABEL T DAN SENAR NILON SEBAGAI MATA POTONG ALTERNATIF PADA MESIN PEMOTONG RUMPUT Nofriady. H; Suryadi
Jurnal Teknik Mesin Vol 3 No 2 (2013): Jurnal Teknik Mesin Vol.3 No.2 October 2013
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2013.v3.i2.9-12

Abstract

Mower is one of many types of machines is used to cut the grass by the Farmers and Workers' City Park. By using this machine, the work will be lighter and faster. However, the eye piece of this machine is very harmful to user and other people around it if it is used to cut grass in rocky or gravel areas. By modyficating the eye piece of this machine by using the other materials is experfed the cutting process will be easier and not harm. In this study has been used the Nylon cable T string as alternatives eye piese. To testing the feasibility of T and cables Nylon Strings, testhing is conducted testing on grass cutting reeds. Tests using a standard eye pieces (2 eyes cut) can cut grass up area of 80 m 2 , whereas Nylon strings can only mow the lawn with an area of 24 m 2 , and T cable with an area 16 m 2 . Nylon strings T and the cable can be cut tall grass, but could not complete the test because of easily broken and easily tangled. From these results, it can be concluded that the alternative material (Nylon Strings and cables T) has not been feasible as an alternative cut eye on mowers
EKSPERIMENTAL PEMBUATAN TUNGKU BAHAN BAKAR SEKAM GABAH UNTUK MENDAPATKAN TEMPERATUR ALIRAN UDARA PENGERINGANAN GABAH YANG OPTIMAL Eka Sunitra
Jurnal Teknik Mesin Vol 3 No 2 (2013): Jurnal Teknik Mesin Vol.3 No.2 October 2013
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2013.v3.i2.13-21

Abstract

Subject matter of this research is focused on the manufacture and research tools husk furnace fuels are useful for generating hot air speed that is used to replace electric heating element before. The flow of hot air coming from the furnace will be used to dry husks of grain. Many previous researchers who have made a husk furnace with a variety of methods and construction, replacing the material in order to produce an optimal temperature. In this paper, the authors conducted a study about how to make tools husk furnace and do research on the tool. This research looks at how adaptable tool to generate a stream of hot air. The method I use is the reset method to find the amount of insulation needed to achieve the speed of air drying temperature. Research using laboratory test equipment such as Airflow meter and thermometer. Test data is retrieved (the speed of air temperature and the amount of insulation required). Measurement methods performed directly on the object of research. Test data were analyzed by using the software Microsoft Excel. The data processing results obtained that the most optimum conditions for temperature 42.60 C, the rate of air velocity of 2.84 m/s with number five bulkheadd.

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