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Rizal Mahmud
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Institut Teknologi Adhi Tama Surabaya Jl. Arief Rahman Hakim No. 100, Surabaya, East Java, Indonesia 60117
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Journal of Mechanical Engineering, Science, and Innovation
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 2776933X     EISSN : 27763536     DOI : https://doi.org/10.31284/j.jmesi
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Mechanical Engineering
Journal of Mechanical Engineering, Science, and Innovation (JMESI) is a peer-reviewed journal in English published two issues per year (in April and October). JMESI dedicated to publishing quality and innovative research in the field of mechanical engineering and science, thereby promoting applications to engineering problem. It encompasses the engineering of energy, mechanical, materials, and manufacturing, but it is not limited to scopes. Those are allowed to discuss on the following scope: Energy: Energy Conversion, Energy Conservation, Renewable Energy, Energy Technology, Energy Management. Mechanical: Applied Mechanics, Automobiles and Automotive Engineering, Tribology, Biomechanics, Dynamic and Vibration, Mechanical System Design, Mechatronics. Material: Material Science, Composite and Smart Material, Micro and Nano Engineering, Powder Metallurgy. Manufacturing: Advanced Manufacturing Techniques, Automation in Manufacturing, Modelling, and Optimization of Manufacturing Processes.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 71 Documents
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Cover and Editorial Page Arifin, Ahmad Anas
Journal of Mechanical Engineering, Science, and Innovation Vol 4, No 2 (2024): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

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Abstract

Aerodynamic Analysis of Diffuser with Airfoil-Based Curved Geometry Across Various Prototypes Ramadhan, Galang Baruna; Wiratama, I Kade; Joniarta, I Wayan
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7313

Abstract

The diffuser can increase air velocity in wind turbines by utilizing pressure differences, particularly in small-scale wind turbines. However, some previous research still uses a simple diffuser shape. One alternative diffuser shape is using the airfoil, the wortmann Fx 63-137 airfoil has high lift, exhibits soft stall characteristics, and has excellent overall performance. This study aims to analyze the wind velocity and wind power output generated by an airfoil-based diffuser. Aerodynamic simulations were used with an inlet wind speed of 5.6 m/s. The diffuser has a diameter of 1020 mm, with length to diameter ratios of 0.1, 0.137, 0.221, and 0.371, with angles of attack from 0° to 8° in 2° increments. The results show that the diffuser 0.371 ratio at an 8° angle of attack achieved the highest wind speed of 10.22 m/s, it generate 513 watts. Conversely, the lowest wind speed was observed with a 0.1 ratio at an 8° angle, where the velocity reached 6.58 m/s, producing 137 watts of wind power. Those findings indicate that diffuser length is directly proportional to wind velocity. However, variation in the angle of attack result in maximum wind velocity at specific angles, and wind power output is directly proportional to wind velocity.
Quantum Mechanics Approach for Metal-Organic Frameworks Deformation Effect on Carbon Capture Performance: A Density Functional Theory Study Muhdi, Krisna Dwipa; Fikri, Ahmad Atif
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7415

Abstract

Increasing carbon dioxide (CO₂) emissions from fossil fuel combustion demand the development of effective and efficient carbon capture technologies. Metal-Organic Frameworks (MOFs) are excellent candidates as adsorbent materials because they have uniform pores, specific surface area, and can modified according to purpose. However, performance of MOFs may decrease due to structural deformation during  adsorption-desorption process, especially under extreme conditions. This study uses a quantum mechanical approach, namely Density Functional Theory (DFT), to analyze effect of deformation, specifically hMOF-13, on its performance in CO₂ adsorption. Through modeling the atomic structure of hMOF-13, an understanding of the quantum interactions between atoms, changes in position of atoms and cells due to deformation is obtained. Simulation results show that mechanical deformation of hMOF-13 decreases CO₂ adsorption performance through pore narrowing and electrostatic charge redistribution. In addition, excessive deformation can trigger structural failures that reduce regeneration cycles and lower carbon capture efficiency. Insights from this study can guide the subsequent development of MOFs with enhanced mechanical resistance, contributing to the optimization of industrial-scale carbon capture processes. By improving the structural stability of MOFs, industries can achieve higher adsorption efficiency, longer material life, and reduced operational costs, making carbon capture technology more feasible and sustainable.
Evaluating the Impact of Alternative Material-Based Catalytic Converters on Automotive Exhaust Emissions Ariyanto, Sudirman Rizki; Warju, Warju; Arifianti, Lailatus Sa'diyah Yuniar; Komarudin, Komarudin; Nugraha, Ata Syifa'
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7287

Abstract

Pollution air in cities in Indonesia, such as Jakarta, Tangerang, and Bandung, is especially caused by exhaust emissions from vehicle motorized, like carbon monoxide (CO) and hydrocarbons (HC), which originate from burning material burn the ones that don't perfect. Technological catalytic converters are used to reduce emissions, but converters made from metal have their own cost. This study evaluates exhaust Metallic Catalytic Converter (MCC) technology with alternative materials copper (Cu). The result shows that the MCC Cu exhaust system is significantly more effective in reducing CO and HC emissions compared with exhaust without the original equipment manufacturer (OEM) catalyst and exhaust. The average CO emissions are 2.13 %Vol and HC emissions are 198 ppmVol, lower compared to the second type of exhaust. Findings This shows that MCC Cu exhaust is not only more effective in reducing danger but is also more economical compared to catalytic converters made from metal noble, offering a solution sustainable and affordable for problem pollution air from vehicles.
Innovative Structural Evaluation of a Dual-Function Cane for Elderly Mobility: A Finite Element Analysis Approach Using SolidWorks Rafana, Hadad; Amrullah, Apip; Ma'ruf, Ma'ruf; Mahmud, Rizal
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7649

Abstract

The increasing proportion of elderly individuals globally underscores the need for safe and ergonomic mobility aids that support independent living and enhance quality of life. This study presents a structural analysis of a multifunctional walking cane prototype, NeoMossa, which integrates an umbrella mechanism, aimed at addressing both mobility and environmental protection needs for elderly users. The analysis employed the Finite Element Method (FEM) using SolidWorks simulation software to evaluate the mechanical performance of the cane under static loading conditions of 300 N, 500 N, and 700 N. Key parameters assessed included Von Mises stress, strain, displacement, and factor of safety. The results demonstrated that all measured values remained within acceptable limits, with the highest stress recorded at 75.98 MPa and a minimum safety factor of 1.72 under the maximum load. These findings confirm that the cane structure is capable of withstanding typical user loads without risk of mechanical failure. The study affirms the feasibility of integrating multifunctional features into assistive devices without compromising structural safety, contributing valuable insight to the design and development of innovative mobility aids for the elderly.
Comparative Assessment of Spot Welding and Lock Seam on Automotive Inner Tubes for QCDSM and Product Lifecycle Sustainability Nurhadi, Hikari Qurrata'ain; Mustofa, Mustofa; Solih, Edwin Sahrial; Gurning, Ridho Hans
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7481

Abstract

In the automotive manufacturing industry, enhancing quality and productivity is crucial to meet customer expectations while ensuring safety, environmental sustainability, and energy efficiency. This study evaluates the collapse strength of automotive inner tubes following ISO 2941 standards, comparing lock seam design with SGCC material and resistance spot welding (RSW) applied to SECD material. The findings show that the lock seam process improves structural strength by approximately 20%, due to more uniform pressure distribution, leading to better stability. A key advantage of the lock seam is its spiral construction, which contrasts with RSW's localized spot welds, contributing to more consistent performance. Additionally, the lock seam process reduces production costs and minimizes environmental impact by using thinner, cost-effective SGCC material. It also enables faster production, enhancing delivery efficiency. The absence of welding fumes improves safety conditions and boosts operator morale, while contributing to a cleaner working environment. From a Product Lifecycle Management perspective, this study shows that the lock seam process optimizes design quality, production efficiency, and sustainability, aligning with the goals of Quality, Cost, Delivery, Safety, and Morale (QCDSM). These results support the adoption of lock seam technology for sustainable, efficient automotive manufacturing.
Cover and Editorial Page Arifin, Ahmad Anas
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

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Abstract

Characteristics of Char and Tar from the Pyrolysis Process of Brem Waste with Temperature Variations Using a Rotary Kiln System Majedi, Farid; Harito, Anatasya Bella Dwi; Ningrum, Fathonah Githa Setya; Ibadurrochim, Muhammad; Fauzi, Muhammad Arijal Fathurrohman; Inel, Limade Gie; Rosy, Karine Efrida; Daniswari, Dery Anton
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.6558

Abstract

One of the processes to obtain new renewable fuels is pyrolysis. This process produces alternative fuels, namely Char (charcoal), tar (bio-oil) and gas. Tar (bio-oil) can be processed into biodiesel. Pyrolysis is the process of breaking down (decomposing) biomass through a heating process with little or no oxygen. Research Pyrolysis of Rotary Kiln System with Brem, Plastic and Durian Peel Waste Biomass on Char and Tar Characteristics. This research was carried out by directly testing the pyrolysis of a rotary kiln system with brem, plastic and durian peel waste biomass. The test parameters use temperature variations of 523K, 573K, 673K, 773K, and 873K. Testing for each biomass is carried out separately, not mixed. The aim of the research is to determine the characteristics of char and tar from each biomass including calorific value, mass, volume and density. Research results the highest char calorific value is 11181.1 cal / gram with plastic waste biomass. The highest calorific value was obtained from tar from plastic waste, which was 14211.3 cal/gram. The highest density value was between 0.9-0.93 grams/ml in biomass from brem waste, plastic waste, durian skin waste.
Enhancement of Solar Panel Efficiency by Comparative Analysis of Cooling Systems Utilizing Water Flow, Air Flow, and No Cooling Pido, Rifaldo; Boli, Rahmad Hidayat; Day, Randy Rianto
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7336

Abstract

This paper presents the results of a study on increasing the efficiency of solar panels with a comparative analysis of cooling systems utilizing air flow, air and without cooling. The method with cooling flow is used to absorb heat generated by the PV module. This study was designed simply and effectively, tested in outdoor conditions. The rear surface of the PV panel was flowed with a fluid that was in direct contact. The results showed that solar panels with air cooling systems were relatively more effective compared to other cooling systems, namely being able to increase output power by 36.50 watts and efficiency by 12.7%, compared to air cooling systems with output power of 34.56 watts and efficiency of 11.12%, while for solar panels without cooling the output power was 31.01 watts and efficiency of 10.56%.
Performance of a Single Cylinder Diesel Engine Fueled by 40% Biodiesel Blend with Excess Air System Firdausah, Risco Eka; Ilminnafik, Nasrul; Asrofi, Mochamad
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.6917

Abstract

In recent years, advances in science and technology have changed human lifestyles and increased global energy consumption. The global innovative search for alternative fuels from renewable sources such as biomass has become important, such as biodiesel. The use of biodiesel in diesel engines requires changes in air supply. Proper air supply is needed to obtain optimal engine performance. The purpose of this study was to determine the effect of using an excess air system on engine performance and exhaust emissions in diesel engines with a mixture of dexlite and biodiesel fuels. The research method used is experimental research and the parameters in this study include the use of an excess air system of 10 L / m, 20 L / m and a load of 300, 400, 500 Watt with biodiesel fuel (B40). The results of this study with the presence of an excess air system can increase combustion efficiency, thus increasing engine engine powerand torque with the most efficient engine power and torque, namely 4.87 KW at a load of 500 watts and 3.101 Nm at a load of 500 watts with excess air of 20 L/m. Fuel consumption also decreases with the presence of an excess air system at 10 L/m load 300 with a value of 0.16 kg/hour. The excess air system can also reduce CO and HC exhaust emissions with excess air of 20 L/m and a load of 300 watts, namely a CO value of 0.02%, an HC value of 18.2 ppm. So the use of excess air is effective in improving engine performance and emissions.

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