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METAL : Jurnal Sistem Mekanik dan Termal
Published by Universitas Andalas
ISSN : 25981137     EISSN : 25974483     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
METAL: Jurnal Sistem Mekanik dan Termal translated as METAL: Journal of Systems in Mechanical and Thermal is a scholarly peer-reviewed journal published by Mechanical Engineering Department of Engineering Faculty at Universitas Andalas, Padang, Indonesia. The journal focused on the mechanics and thermal aspects of the mechanical engineering area, and accepted articles are in these subjects: Energy - Renewable energy - Green industry - Energy conversion Mechanical System Engineering - Solid body mechanics - Machine construction - Vibration and control - Mechatronics - Tribology Production System Manufacturing engineering - Product design and development - Production technology - Production logistics and transportation Materials Engineering - Material technology - Nanotechnology
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 143 Documents
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Reaktor Nitrifikasi Biofilter Untuk Air Limbah Sisa Makanan Dan Feses Ikan Benny Dwika Leonanda; Yegi Zolanda
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 1 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.774 KB) | DOI: 10.25077/metal.2.1.9-14.2018

Abstract

In the sector of freshwater fish breeding, many fish are found dead suddenly. The cause of the  fish death suddenly can occur due to toxic water or low oxygen content in the water. In Maninjau Lake, fish died suddenly because of low oxygen content in the water. The low oxygen content in water is caused by increased ammonia from food waste and fish feces. Results in active bacteria and metamolizes by absorbing oxygen in the water.  One way to overcome this is to react with a biofilter reactor. In operation, the reactor is given an inlet debit of 1 to 3 lt / min for the test material and the inlet is worth 10 to 20 lt / min. The highest reactor effectiveness is at the debit of test material  2 lt / min and the debit of air15 lt / min. It is characterized by changes in the pH of water that returns to normal.
Analisa Thermoelectric Generator (TEG) Sebagai Penghasil Listrik Dengan Variasi Media Pendingin Air Dan Tanah Dhimas Satria; Dwinanto Dwinanto; Arif Octa Arisandi; Imron Rosyadi; Rina Lusiani; Erny Listijorini
METAL: Jurnal Sistem Mekanik dan Termal Vol 4, No 2 (2020): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1835.151 KB) | DOI: 10.25077/metal.4.2.52-61.2020

Abstract

The energy produced by the Sun is heat energy and light energy. One of the uses of solar thermal energy is the thermoelectric generator (TEG). This research on solar thermoelectric generators uses 2 variations of cooling media, namely water cooling media and soil cooling media with a series series for thermoelectrics, while what will be analyzed is the amount of power from both tests and the ability the solar collector absorbs the sun's radiation heat. The test results and calculations determine the calorific value of solar radiation that is absorbed by the collector. That is 25,265 Watts. As for the results of testing the cooling media, the best results were obtained for the water cooling media with the greatest value at 0.04 Watt.
Desain Sistem Vakum untuk Mendinginkan Ruang Transformator Benny Dwika Leonanda; Yul Hizhar; Firman Ridwan; Diki Zuhury
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 1 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1012.53 KB) | DOI: 10.25077/metal.6.1.60-68.2022

Abstract

An analysis has been carried out on designing a 60 MVA 150 kV transformer cooling chamber vacuum system. The transformer cooling chamber is vacuumed up to a pressure of 0.001 kPa. This is done to avoid the formation of gas bubbles, avoid condensation and sterilize the transformer chamber before filling the coolant. Therefore, we need a vacuum pump and other equipment called a vacuum system. The analysis of the vacuum system includes the work required by the system, vacuum time, and electrical energy. The design wllii uses a rotary pump and a root pump by varying the number of pumps with two, three, and four pumps. The results of the analysis show that the work that must be done by the design is the largest and the vacuum time is the least in the design that uses 2 pumps with a value of 2860.38 Kj and 39.31 hours. While the effective electrical energy is found in a design that uses 3 pumps. It can be concluded that an effective design is found in the design using 3 pumps. From the tests carried out in the field for the design of 3 pumps there is a difference of 5.3 hours and 38.31 kWh compared to the theoretical test.
Study of Improving Fracture Toughness of Un-Saturated Polyester with Addition of Mixing Percentage of CPO Oils Nusyirwan Adnand; Ilham S
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.132-137.2022

Abstract

Unsaturated polyester is a polymer that is widely used as a basic matrix to form strong composites for engineering applications such as for cars, ships and aeroplanes. The advantages of using this material are owing to have a fairly high tensile strength when reinforced with appropriate reinforcing fibers, light and easy to shape. However, due to its brittle nature, this material cannot withstand shock loads. Therefore, it is necessary to overcome that weakness. Crude Palm Oil (CPO) can give benefits as a strengthening agent. However, its proper mixture to polyester need to be figured out so that it would help in improving crack resistance properties of this polyester. This can be done by determining of fracture resistance value of the mixture polymer. A crack resistance testing was carried out and crthe itical stress intensity factor was calculated based on ASTM D 5005. The composition of the CPO mixture was varied from 100%: 0%, 10%: 20%, 30%: 40%. From the test results, it can be identified that the greatest critical stress intensity factor is  = 15.787  MPa.m1/2. This is found out in composition of 30% CPO. Meanwhile the critical intensity factor of pure Unsaturated Polyester (UP) is only 2,023 MPa.m1/2. There is approximately 700% improvement that can be gained in mixing with CPO.
Tool life in Turning Processes: Effect of Lubricants with a small amount of Graphite as Cutting Fluid Agus Sutanto; Ismet Hari Mulyadi; Farchan - Vernando
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.69-76.2022

Abstract

This study aims to determine the effect of various lubricant-based cutting fluid parameters to produce an optimal tool life in turning operations. This research does not use coolant as a cooling fluid, but as a lubricant with the addition of a small amount of graphite (solid lubricant) at a minimum quantity condition. By using HSS cutting tools and a low carbon steel workpiece, an experimental design was carried out using the Taguchi method with three parameters, that is the viscosity of the lubricant, the percentage of graphite in the lubricants, and the supplied pressure of the lubricants. Each parameter is designed to have three levels. The experimental results show that the percentage of graphite in the lubricant has the largest contribution of 52% and the viscosity of the lubricant is 38% while the fluid supplied pressure is only 7% of the tool life. Furthermore, based on the analysis of variance (ANOVA) it is known that the percentage of graphite and viscosity of the lubricant has a significant effect on the cutting tool life. The optimal and longest tool life is achieved when carried out with lubricant SAE20-50 with the percentage addition of 0.10% graphite with a pressure of 5 Bar.
An Effect of Biocomposite Composition and Material on Brake Pad Wear Yuniarto Agus Winoko; Achmad Dhani Audi Pratama; Umi Anis Ro'isatin
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.102-106.2022

Abstract

Asbestos material which is widely used in brake pad friction material is carcinogenic is harmful to long term health. The method of making brake pads is by mixing the basic ingredients of brake linings from nature in the form of bamboo powder and bagasse ash with different percentages of mixtures of 25% bamboo powder, 35% bagasse ash and 40% polyurethane sample coded A. 35% bamboo powder , 25% bagasse ash and 40% polyurethane sample coded B. While 45% bamboo powder, 15% bagasse ash and 40% polyurethane sample coded C. Using compression molding with a compressive force of 14.709 N. The highest average hardness is 77, 4 HD was obtained on the brake lining coded A with the ratio of a mixture of 25% bamboo powder, 35% bagasse ash and 40% polyurethane. While the lowest average hardness value of 70.6 HD was obtained on brake pads with code C with a mixture ratio of 35% bamboo powder, 25% bagasse ash and 40% polyurethane.
Innovation for Making Portable Induction Furniture as a Solution for System Waste Handling Post-vaccination COVID-19 Vaccine Ridwan Abdurrahman; Ahmad Kafrawi Nasution; Ayub Satria
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.138-142.2022

Abstract

The world was shocked by the outbreak of a new virus called Coronavirus Disease 2019 (COVID-19) in 2020. The use of personal protective equipment in the community during a pandemic resulted in an increase in the amount of medical waste. Syringe is one of the medical waste from the COVID-19 pandemic which is classified as metal waste. One of the solutions offered is a medical waste incinerator. By studying the medical waste incinerator model in hospitals, the researchers finally took the initiative to design a simple incinerator. The incinerator to be used is a portable induction type. It is hoped that the use of this incinerator will be able to overcome the existing medical waste problem. Keywords: Evaluation, Incinerator, Garbage, Induction.
Test Performance of Plastic Waste Shredder Machine and Analyze the Quality of the Shredded Plastic Product Using the Taguchi Method Adam - Kamil; Hendra Hendra; Sidik Susilo; Erny Listijorini; Hernadewita Hernadewita
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.77-83.2022

Abstract

The food and beverage industry contributes 65% to the total plastic packaging demand and also produces plastic waste. This causes problems for the environment, humans, and others, especially in the waste treatment process. Because plastic is difficult to recycle by the soil or the environment. Consumption of plastic packaging also reaches 65% of the total national plastic consumption. To overcome this plastic processing, a plastic Waste processing machine is made that can process and change the form of plastic waste into other derivative products. The important thing in plastic processing machines is the ability of plastic processing machines to produce products according to consumer desires. The purpose of this research is to get the maximum capacity of plastic Waste shredding, and to know the production capacity of plastic waste in one process of enumeration. The experiment method is used in this research to get the performance of the machine like voltage, power, cutting force of tool, and cutting speed. Also Taguchi method are used to analyze of quality product by varying shape of product waste plastic such as cup, bottle and gallon cap. In this test, a maximum capacity of 20Kg/hour was obtained by using the plastic gallon cap test material. By calculate of cutting force for gallon cap is obtained voltage 231.5 Volts and power 555,4  Watts at shaft rotation 24,96 rpm. Cutting force of tool is 25,92 N and torque 1,68Nm with cutting speed of 1.986 m/min. For cup plastic obtained, the results on voltage are 238.9 Volt and power 585,96 Watts by a shaft rotation of 25,1 rpm. The cutting force of the tool is 54 N and torque 3.36 Nm with a cutting speed of 2.025m/min. For the plastic bottle, the Voltage is 238.86 Volt and the power of 595.9 Watts at the shaft rotation is 24,8rpm.  Cutting force of tool is 119.23 N and torque is 7.75 Nm at the cutting speed is 1.97m/min.
Improve TAT Refurbishment Process Excavator 20 Tons in Heavy Equiment Workshop Refnal Marzuki; Rino Sukma; Nofriyandi R; Rusmardi Rusmardi
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.107-116.2022

Abstract

This study discusses the turnaround time (TAT) process in the 20 Tons Excavator refurbishment process carried out by a heavy equipment repair shop in Palembang City. TAT is the time range for the completion of the work, starting from when the tool arrives at the workshop until the job is completed. In this study, the employer is the owner of the heavy equipment, and the work recipient is the workshop where the heavy equipment is carried out. Based on the workshop records, during the 20 Tons TAT Excavator's refurbishment process, the best time was achieved was 56 working days. At the same time, the entrepreneur felt that 56 days was too long and the entrepreneur asked that this repair could be completed within a maximum of 30 working days. This delay causes huge losses for entrepreneurs resulting in lost business opportunities. This research aims to increase the TAT for the completion of the 20 Tons Excavator refurbishment work completion time following the work completion agreement. For this reason, it is necessary to conduct a study to determine the causes of delays in repair work. In this study, the authors use the method used in this analysis: Define, Measure, Analyze, Improve and Control (DMAIC). Based on the research, it was found that three things significantly affect the delay in completing the work, namely the limited area for painting, work agreements as a result of the availability of spare parts and completion of work from third parties. In the process of reconditioning heavy equipment, namely setting up the painting area, availability of spare parts and ensuring the completion of work submitted to third parties, to achieve the fastest time for completion of work
The Effect of the Gap Spark Plug Electrode to The Performance of Motorcycle GL 200 D Riza Muharni; Ade Ari Agasi; Muchlisinalahuddin Muchlisinalahuddin; Dytchia Septi Kesuma; Ade Usra Berli
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.84-88.2022

Abstract

The spark plug electrode gap is a narrow distance between the center of electrode and the mass of electrode.  This gap has a very big influence on the performance of the gasoline motor. If the spark plug electrode gap is not adjusted correctly or too tight, it will result the spark produced be weaken and the power generated will decrease, meanwhile if the spark plug electrode gap is too wide, it will cause to combustion failure while operate with high rpm. In this research, the effect of the spark plug electrode gap (0.6 mm,0.7 mm and 0.8 mm) on the GL 200 D motorcycle performance is conducted with different input torque and power. The experimental results show that the maximum torque is 14,75 ft-lbs at 6000 rpm and the maximum power is obtained using 0.7 mm spark plug electrode gap where the maximum power is 19,31 Hp at 8000 rpm.The spark plug electrode gap is a narrow distance between the center of electrode and the mass of electrode.  This gap has a very big influence on the performance of the gasoline motor. If the spark plug electrode gap is not adjusted correctly or too tight, it will result the spark produced be weaken and the power generated will decrease, meanwhile if the spark plug electrode gap is too wide, it will cause to combustion failure while operate with high rpm. In this research, the effect of the spark plug electrode gap (0.6 mm,0.7 mm and 0.8 mm) on the GL 200 D motorcycle performance is conducted with different input torque and power. The experimental results show that the maximum torque is 14,75 ft-lbs at 6000 rpm and the maximum power is obtained using 0.7 mm spark plug electrode gap where the maximum power is 19,31 Hp at 8000 rpm.

Page 9 of 15 | Total Record : 143

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