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INDONESIA
Jurnal Teknik Mesin
Published by Politeknik Negeri Padang
ISSN : 18298958     EISSN : 26555670     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Teknik Mesin adalah sebuah jurnal peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang teknik mesin.
Arjuna Subject : -
Articles 204 Documents
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Analisis Performa Kampas Rem Rekayasa Ramah Lingkungan: Peran Phenol Formaldehyde dan Aditif Biokomposit Bustomi, Ahmad; Nur, Hamid Ramadhan; Muhammad, Rouf; Zaman, Mochamad Nuruz
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1623

Abstract

The issue of environmental damage is increasingly becoming a concern of the global community, including in the automotive industry. The use of environmentally friendly materials and the reduction of dependence on mineral-based or synthetic materials have become challenges that need to be overcome. Brake pads, as one of the components that have a vital role in a motor vehicle, are generally made of heavy metal materials, asbestos, and synthetic resins that can pollute the environment during the production process. The use of environmentally friendly raw materials such as wood powder, cocopeat and coconut shell carbon is an alternative in the brake pad production process. This study aims to analyze the performance of brake pads made of phenol formaldehyde with the addition of environmentally friendly biocomposites in the form of wood powder, cocopeat and coconut shell carbon. The method used is an experimental laboratory designed to evaluate the friction coefficient, wear rate, and microstructure of materials through Scanning Electron Microscopy (SEM). The results of the study show that this biocomposite brake pad has good wear resistance at high temperatures, especially with the carbon content of coconut shells which helps improve thermal stability. However, the value of the friction coefficient of brake pads still does not meet the minimum standard set by the Indonesian National Standard (SNI) 09-0143-1987, which indicates that this material is not yet fully feasible for automotive applications with high friction demands. Further research is needed to optimize the composition of materials, especially in increasing the friction coefficient to match industry standards.
Perancangan Ruang Pendingin Karkas Ayam Broiler Memanfaatkan Sumber Energi Hibrida Hafiz, Rahmat; Haris, Haris; Effiandi, Nota; Chadry, Rivanol; Saputra, Feri
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1629

Abstract

Small-scale broiler farming in Indonesia often suffers losses due to high production costs. In addition to rising feed prices, these losses are frequently caused by chickens that are ready for harvest being unsold in the market due to a decline in purchasing power. One solution that farmers can implement is to slaughter the chickens at the appropriate harvest time and store the carcasses in cooling rooms to sell them when market prices increase. This study aims to design and specify cooling storage equipment to store broiler carcasses using a combination of commercial and solar energy sources. The research begins by determining the cooling load of the system, specifying refrigeration components, evaluating solar energy potential at the location, and designing the required electrical system. Solar energy potential was calculated based on meteorological data obtained from an online database and processed using the PvSyst 7.2 application. Based on the analysis, the cooling storage requires 4.69 kW of power to reach optimal temperature within 6 hours, with a COPR value of 2.2. Meanwhile, the solar energy potential at the installation site is 4.44 kWh/m²/day, enabling the solar power system (PLTS) to generate an estimated annual energy output of 1802 kWh with a Performance Ratio (PR) of 65.07% and a Solar Fraction (SF) of 91.85%.
Studi Kelayakan Pemanfaatan PV sebagai Sumber Energi Ruang Pendingin Karkas Ayam Broiler Efendi, Mutiara; Hamzah, Reodhy; Indah Negara, Vamellia Sari; Araliz, Maheka Restu
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1631

Abstract

When chicken prices drop, farmers often extend the harvesting period, which inevitably increases production costs. An alternative solution is to store chickens as carcasses in cooling storage. Indonesia has significant solar energy potential for the implementation of solar cooling storage technology to reduce electricity costs as a power source for cooling storage. This study aimed to analyze the economic feasibility of designing solar cooling storage with a one-ton carcass capacity. The research method involved analyzing the costs of implementing cooling storage by comparing the costs of electricity sourced from PLN, solar energy using PV, and extending the harvesting period by up to 10 days. The analysis results showed that the designed cooling storage had a capacity of 12 m³, and the production costs for storing carcasses using hybrid PLN and PV electricity were more efficient than using PLN electricity alone. This cost-saving approach is significantly more efficient than the production costs incurred when farmers extended the harvesting period. In terms of economic feasibility, the BEP values for PLN and PV electricity sources were 18.86 and 21.02 years, respectively. The calculations showed a BEP difference of approximately 5 years between PLN and PV electricity; however, economically, PV systems were more advantageous in the long term.
Analisis Exergoeconomic Pada Kompresor Gas Engine Siklus Miller Berbahan Bakar Pome Fajri, Ahmad Hasnul; Adriansyah, Adriansyah; Mayana, Hendri Candra; Leni, Desmarita
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1636

Abstract

Energy efficiency is a crucial challenge in energy resource management. One innovative approach to improving efficiency is through exergy and exergoeconomic analysis. Exergy analysis considers not only the quantity of energy but also its quality, based on the second law of thermodynamics. Meanwhile, exergoeconomic analysis integrates exergy analysis with economic aspects, such as cost calculations. This study uses the Tandun Biogas Power Plant (PLTBg) as a case study to evaluate energy efficiency and operational costs. The analysis begins with the collection of economic data, including investment costs, fixed operation and maintenance (OM) costs, and variable OM costs.The results show that the investment cost is $0.016/kWh, fixed OM costs are $0.030/kWh, and variable OM costs are $0.009/kWh. The cost losses due to exergy destruction before the overhaul of the gas engine were recorded at $127.23/hour, with contributions from each component as follows: combustion chamber ($51.63/hour), compressor ($21.62/hour), and turbocharger ($53.98/hour). After the overhaul, the total cost losses significantly decreased to $3.3752/hour, with detailed losses from the combustion chamber ($1.168/hour), compressor ($2.193/hour), and turbocharger ($0.0142/hour). This study demonstrates that exergy and exergoeconomic analysis can identify significant opportunities to improve energy efficiency and reduce operational costs in biogas-based power plants. This approach serves as a practical guideline for optimizing energy systems in the renewable energy industry sector.
Rancang Bangun Mesin Penepung Pakan Ternak Multifungsi Untuk Kelompok Tani Berkah Mandiri Mayana, Hendri Candra; Mulyadi, Mulyadi; Nofriadi, Nofriadi; Z, Dito Farizal; Putri, Elsy Kumala
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1653

Abstract

Animal feed is one of the essential components supporting livestock growth and development. High-quality feed can significantly enhance farm productivity. However, in the preparation of feed in powdered form, efficient machinery is often required to process raw materials into fine particles. This study aims to design and develop a multifunctional animal feed grinder capable of processing various raw materials, such as corn, rice husks, oil palm fronds, wild grass, and straw, into fine powder. The machine is designed with a power output of 4,856.95 watts, utilizing a 6.5 HP gasoline engine, and has a production capacity of 11.34 kg/hour at 3,600 rpm. The trial results demonstrated the machine's production capacity for each material per hour: corn at 32.2 kg, rice husks at 22.9 kg, oil palm fronds at 30.2 kg, wild grass at 16.5 kg, and straw at 10.8 kg. This multifunctional grinder is expected to assist farmer groups in processing animal feed more efficiently and effectively.
Pengaruh Penambahan Tangki Pengumpul Kondensat Terhadap Penghematan Energi Boiler Cochran pada PT. Eastern Pearl Flour Mills Juhamri, Juhamri; Astuty, Sri; Subur, Hikmayani
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1661

Abstract

One effort for saving the energy in the production process is the reuse wasted energy from these productions. This study aimed (1) to determine the effectiveness of the addition of the condensate steam collector tank collection tank on the return pipe line of the boiler on the saving capacity of the Cochran boiler, which was determined based on the boiler efficiency, the fuel consumption, and the amount of water impurity (TDS);(2). to determine the balance between the mass system and the energy boiler system as one of the effectiveness evaluation system of the additionall condensate collector tank. This research was conducted at PT. Eastern Pearl Foulr Mills, Makassar – more specifically at the boiler section and power station. The method used was that the data were collected and processed before and after the condensate collector tank was installed. Thus, it was expected that the difference showing the effect of the additional tank on the energy saving of boiler system. Besides, the research would also determine the conditions of each line point of the working fluid path; next, the efficiency of the boiler, the consumption of the fuel and the amount of the water impurity in the fluid working path would be determined; finally, the mass and the energy balance of the existing system would be determined. The research result revealed that efficiency before the installation was 52.72 % in average, and after the installation was 64.55 % in average. Before the installation of the condensate collector tank, the average fuel consumption was 94.39 kg/hour, while after the installation the average fuel consumption was 75.45 kg/hour. The reason was that the water used tended to be cleaner as seen in the lower TDS than before the installation. Then, the fuel energy of 849. 45 kW was able to produce useful steam energy of 556. 94 kW.
Reverse Engineeirng Karakteristik Geometri dan Analisis Fungsi Konfigurasi Golok Koleksi Museum Situs Kepurbakalaan Banten Lama Wisnu, Ageng Buana; Haryadi, Haryadi; Hendra, Hendra
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1480

Abstract

The research refers to the civilization of manufacturing technology during the Banten Sultanate which carried out metal trade with foreign countries. One of them exported a copper ore to Keling Country and imported scrap iron from Europe. By obtaining the results of the research, it is hoped that it can reveal what manufacturing technology was used, what materials were used in making machete samples and get the usefulness of the research results that can be used. The purpose of this research is to identify the manufacturing process used when making the machete and determine the effect of the configuration on the function of the machete and the strength of the material, determine the effect of the comparison between the modern machete and the museum collection machete and identify the nature of research on the museum collection machete. The method used is a reverse assessment method of a sample of the museum collection's golok. The results obtained are the function of the machete which tends to be in a combination function (attack and control) with a CoG percentage of 35.45 - 41.42% of the overall length of the machete and the manufacturing process used on one of the machetes in the form of casting (cast) with reference to the results of metallographic testing getting nodular cast iron results, with the results of simulations using solidworks giving loading in the lateral and axial directions experiencing stress of 2.936x108 N/m² and 1.541x108 N/m² and a lateral safety factor of 1.2 and axial 2.3.
Optimisasi Jarak Titik Spot welding Terhadap Tensile Strength Sambungan Stainless Steel Lubis, Sobron Yamin; Wiyoso, Aghastya; Michel, Jhon; Benaya, Benaya
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1741

Abstract

Spot welding is a metal joining technique that can produce high joint strength according to the desired design. Spot welding, using current through the weld point with two electrodes to melt the metal and combine it. In joining two plates, if you want to produce a better joint, more than one welding point can be done, but the distance between one and the other needs to be considered in order to produce a joint that has high tensile strength. Therefore, in the study, the distance of the point connection was varied with the aim of finding the optimal connection point to produce high tensile strength. The study was conducted using a spot-welding machine in the Mechanical Engineering Study Program laboratory, stainless steel plate material was connected with a current voltage of 1.75 V and 2.20 V, and variations in the distance of the welding point were 10, 20 and 30 mm. The welding specimens were tested for tensile strength using a tensile test in the engineering materials laboratory. The results of the study showed that the highest tensile strength value of 3835.08 MPa was obtained at a current voltage of 2.20 V and a welding point distance of 10 mm. The further the welding point, the greater the electrical resistance, which causes the distribution of heat and current to be uneven. As a result, not all parts required for the formation of the joint will be optimally affected by heat and pressure.
Analisis Distribusi Termal Model Tabung Rheology Test Apparatus Sebagai Media Pengujian Ultrafine Bubbles (UFBs) Nopriani, Meti Eliza; Puspawan, Angky; Witanto, Yovan; Budiman, Arif Adtyas
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1759

Abstract

The Fukushima Daiichi nuclear reactor accident has become a major concern in the development of safety design for advanced nuclear reactors. The reactor coolant system is part of the passive safety system, including the containment or reactor building cooling system. This system is designed to prevent damage to the reactor vessel structure and concrete building materials due to excessive heat release into the environment. The coolant flow is designed to move naturally without the help of a pump, utilizing the difference in fluid density as the main driver. The type of coolant plays a major role in generating the flow, especially in terms of its density properties. Fluids with a lower density than water can produce faster flow. One method to reduce the density of water is to insert fine bubbles known as ultrafine bubbles (UFB). To study the thermal characteristics of the fluid when heated, the Rheology Test Apparatus device is used. This study specifically examines the Rheology tube model. Analysis of temperature distribution in the tube is carried out using Computational Fluid Dynamics (CFD) simulations to understand the heat transfer mechanism. The validation process was carried out through experiments at a fluid temperature of 90°C, with a comparison of the temperatures at two points in the height of the tube, namely 0.16m and 0.8m, which are the locations of the heater and show the highest temperature.
Perancangan Mesin Perontok Padi Dengan Sistem Rotari Pristiansyah, Pristiansyah; Hasdiansah, Hasdiansah; Rohman, Habibu; Saputra, Rahman; Aprilia, Silvy
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1766

Abstract

Rice is one of the staple foods consumed by the people of Indonesia, including the Bangka Belitung Islands Province, more precisely in Bangka Regency, Riau Silip District, Banyu Asin Village. Newly harvested rice is usually not yet separated from the straw/panicle. The rice harvesting process still uses traditional tools or also called gebotan. One example is the rice threshing machine in Banyu Asin Village which has not been able to maximize the threshing results, which results in a long threshing process. The machine is only capable of threshing 30 kg/hour of rice that is put into the machine. Based on these needs, a rice threshing machine design was made to facilitate the threshing process. The design of the rice threshing machine refers to the design method, namely: planning, conceptualizing, designing, and finishing, then assessed based on technical and economic aspects. The designed machine uses a rotary system to thresh rice from its stalks, uses a combustion engine as a driving system, pulleys and belts as transmission elements, and the machine can be moved because it is lighter than existing machines. From the design results, this rice threshing machine has a minimum capacity of 80 kg/hour.

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