International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
International Journal of Mechanical Engineering Technologies and Applications (MECHTA) is published by Mechanical Engineering Department, Engineering Faculty, Brawijaya University, Malang, East Java, Indonesia. MECHTA is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. MECHTA accepts submissions from all over the world, especially from Indonesia. MECHTA aims to provide a forum for international academicians, researchers, and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of MECHTA is specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in the English Language.
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<![CDATA[THE PREDICTION OF HYDROGEN EVOLUTION REACTION FROM DYNAMIC MAGNETIC FIELD ASSISTED WATER ELECTROLYSIS ARTIFICIAL NEURAL NETWORK ]]>
<![CDATA[Nugroho, Willy Satrio]]>;
<![CDATA[Purnami, Purnami]]>;
<![CDATA[Schulze, Ajani Aiman]]>;
<![CDATA[Anggara, Teuku]]>;
<![CDATA[Schulze, Klauss]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.1
<![CDATA[This study explores the prediction of Hydrogen Evolution Reaction (HER) performance in Dynamic Magnetic Field (DMF) assisted water electrolysis using Artificial Neural Networks (ANN). The integration of ANN models with experimental data from DMF-assisted electrolysis provides valuable insights into the complex interplay between magnetic fields and electrochemical processes. The results show significant enhancements in HER rates compared to conventional electrolysis, with static magnetic fields also contributing to performance improvements. The ANN models developed exhibit high accuracy in predicting HER performance under varying DMF rotational speeds, as evidenced by low Mean Squared Error (MSE), Root Mean Squared Error (RMSE), and high R-squared values, demonstrating their strong predictive power and reliability. However, caution is advised regarding overfitting, and future research should focus on incorporating techniques like regularization and cross-validation to enhance model generalization. This study lays the foundation for further optimization of efficient hydrogen production technologies in the context of sustainable energy solutions.]]>
<![CDATA[FLUID FLOW CHARACTERISTICS IN A SHELL AND TUBE HEAT EXCHANGER WITH SWIRL BAFFLES ]]>
<![CDATA[Rahman, Aulia]]>;
<![CDATA[Winarto, Winarto]]>;
<![CDATA[Siswanto , Eko]]>;
<![CDATA[Yulianti , Lilis]]>;
<![CDATA[Kusumastuti , Rizky]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.2
<![CDATA[This paper presents a numerical investigation into the fluid flow and heat transfer characteristics of a shell and tube heat exchanger (STHeX) equipped with baffles that induces swirl flow. A Computational Fluid Dynamics (CFD) model was created to simulate the STHeX behavior, and its accuracy was confirmed by comparing it to the Bell-Delaware method results. The two sets of calculations exhibited good agreement, validating the CFD model. The velocity component of the fluid flow was analyzed both qualitatively and quantitatively. The flow patterns of eddies on the STHeX were carefully examined and their correlation with thermal performance was investigated. This study demonstrates that the swirl flow baffle geometry leads to a more turbulent flow pattern, resulting in an increase in the overall heat transfer coefficient. The findings indicate that the swirl flow baffle enhances heat transfer performance and reduces pressure drop in comparison to a conventional STHeX.]]>
<![CDATA[EFFECT OF PENETRATION POSITIONS BULLETS ON A PERFORATED PLATE AGAINST BALLISTIC RESISTANCE OF FIBER METAL LAMINATE (FML) ]]>
<![CDATA[Fadly, Muhammad Syaiful]]>;
<![CDATA[Purnowidodo, Anindito]]>;
<![CDATA[Setyarini, Putu Hadi]]>;
<![CDATA[Mustafa, Mustafa]]>;
<![CDATA[Hamzah, Muhammad Sadat]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.3
<![CDATA[This study aims to examine the phenomena that occur due to projectile penetration on fiber metal laminate. Ballistic testing was carried out experimentally according to National Institute of Justice standards (NIJ Standard 0101.06 level III-A) using a 9 mm full-metal jacket projectile with a normal angle of attack (90° to the target). The results showed that fiber metal laminate could withstand the projectile rate by penetrating the first layer (aluminum plate) and the second layer (aramid/epoxy), while the last layer was deformed to form a bulge. The pierced aluminum plate is characterized by petalling failure. Meanwhile, the aramid/epoxy was penetrated by the projectile with failure of the primary yarn to break the fiber.]]>
<![CDATA[INFLUENCE OF LORJUK MUSSEL SHELLS AND PEANUT SHELLS AS CARBURIZER MEDIA IN THE PACK CARBURIZING PROCESS OF AISI 1020 ]]>
<![CDATA[Achmadi, Achmadi]]>;
<![CDATA[Widodo, Teguh Dwi]]>;
<![CDATA[Irawan , Yudy Surya]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.4
<![CDATA[AISI 1020 steel is low-carbon steel with a carbon content of 0.20% and good ductility but low hardness. One of the methods to increase the hardness is by infusing carbon. The addition of carbon, called carburizing, was done by heating at a high enough temperature, namely at austenite temperature, in an environment containing active carbon atoms so that the active carbon atoms would diffuse into the steel surface and reach a certain depth. After the diffusion process, a rapid cooling treatment (quenching) is followed to obtain a harder surface, but the center is ductile. The carburizing process requires activation energy to diffuse carbon in the material. Catalysts are one solution to increase activation energy so that the time required during the carburization process is less. The study used carburizer from Lorjuk mussel shells as a catalyst and peanut shell charcoal as a source of activated carbon. The variations used were 0% catalyst/100% charcoal, 10% catalyst/90% charcoal, 20% catalyst/80% charcoal, and 30% catalyst/70%. The results of the study obtained the highest hardness and carbon diffusion values, the smallest corrosion rate obtained in the addition of 30% catalyst, and the lowest hardness in specimens without catalyst.]]>
<![CDATA[THE EFFECT OF EXHAUST EMISSIONS L, O2, CO, CO2 AND HYDROCARBON FOR PERFORMANCE OF ALL NEW ERTIGA AUTOMOTIVE ]]>
<![CDATA[Batutah, Moh Arif]]>;
<![CDATA[Nguyen, Duong Tuan Anh]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.5
<![CDATA[The automotive with various and brands, both from Asia and Europe are all here. How much exhaust emissions are produced if each person uses the motor vehicle itself. The purpose of this study is to compare the quality of fuel used with the exhaust emissions of l, O2, CO, CO2 and HC produced. The test method is conducting sampling tests on All New Ertiga and testing emissions using a Gas Analyzer Tester. The fuel variants used in the emission testing process are pertamax, pertamax + octan booster, pertamax turbo and pertamax turbo + octan booster. With several variants of fuel used, can find effect l, O2, CO, CO2 and HC produced on these automotive. The best engine performance at 115 Nm of torque with emissions are still below TLV (threshold limit value) for pertamax, while for pertamax turbo the best performance at 120 Nm with emissions below TLV.]]>
<![CDATA[AN OVERVIEW OF PREPARATION AND PROPERTIES OF NANOFLUID AS CUTTING FLUID USING VEGETABLE OIL FOR SUSTAINABLE MACHINING PROCESS ]]>
<![CDATA[Habiby, M. Nuril Anwar]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.6
<![CDATA[Machining processes such as turning, milling, drilling and grinding are currently required to be environmentally friendly, including cutting fluids whose function is to reduce friction, wear and corrosion. Mineral oil is a cutting fluid that is widely used in the manufacturing industry, but the problem is that it is nondegradable and the raw material has the potential to run out. Therefore, this review article aims to discuss a literature review regarding the solution to this problem, namely the use of nanofluids as cutting fluids made from vegetable oil because not much has been discussed in Indonesia. Vegetable oils are more environmentally friendly, the ingredients are abundant in nature, and have excellent lubrication properties. The characteristics of nanofluids as cutting fluids such as thermophysical, rheological and tribological properties are also explored in this review article to find out the latest research. According to the literature, it is found that the use of nano-cutting fluid made from vegetable oil can improve thermal properties and tribological performance to reduce friction and wear in the machining process due to superior cooling and lubrication to produce green manufacturing in the future.]]>
<![CDATA[AN ANALYSIS OF LIFE CYCLE SUSTAINABILITY ASSESSMENT ON THE SUGAR PRODUCTION PROCESS IN PT X ]]>
<![CDATA[Dina, Atikah Aulia]]>;
<![CDATA[Tama, Ishardita Pambudi]]>;
<![CDATA[Gapsari, Femiana]]>;
<![CDATA[Ayunin, Aliya Qurrota]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.7
<![CDATA[Among the industries that have detrimental effects on the environment is the sugarcane sector. Consequently, it is possible to draw the conclusion that the sugarcane sector is not environmentally sustainable. According to the study's findings, the primary cause of all damage categories is the usage of power produced through bagasse cogeneration. With a total score of 71,2%, human health makes the largest contribution to the harm categories. It is anticipated that this research's findings will lessen PT X's environmental effect, making the company more environmentally sustainable.]]>
<![CDATA[PREPARATION AND CHARACTERIZATION OF MICROCRYSTALLINE CELLULOSE FROM OIL PALM FROND BY CHEMICAL AND MECHANICAL TREATMENT ]]>
<![CDATA[Randis, Randis]]>;
<![CDATA[Darmadi , Djarot B.]]>;
<![CDATA[Gapsari , Femiana]]>;
<![CDATA[Sonief , Achmad As’Ad]]>;
<![CDATA[Rus , Tatag Yufitra]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.8
<![CDATA[Oil palm fronds are currently an underutilised by product of plantations. The micro and nano cellulose can be utilised to create new goods, such as being used as a filler in environmentally friendly degradable composites. This study examined the process of extracting oil palm frond fiber (OPFF) by using a series of chemical and mechanical treatments to get pure microcrystalline cellulose (MCC). The MCC obtained by OPFF was subsequently analysed in further detail. The identification of morphological analysis, presence of functional groups, and crystallinity index were conducted using Scanning Electron Microscopy (SEM), Fourier Transform InfraRed (FTIR) and X-Ray Difraction (XRD) techniques. The findings revealed the presence of microcrystalline structures in OPF fibers, having a mean measurement of width 3.2 ± 0.42 ?m. The application of FTIR verified that the elimination of noncellulosic constituents from the treated OPF fibers had achieved its utmost level. Simultaneously, X-ray diffraction research revealed that the utilization of chemical procedures resulted the formation of a characteristic cellulose crystal structure and an augmentation in the crystallinity index. However, the mechanical treatment resulted in a minor drop in the crystalline index. This can be ascribed to the disturbance of cellulose chains and the crystal structure within the cellulose fibers. The cellulose obtained from raw fibers and subsequent processing exists in a very pure form, specifically in the cellulose I? structure. This enables its utilization as reinforcement in eco-friendly MCC-based green composites, offering numerous benefits.]]>
<![CDATA[THE EFFECT OF COMPRESSOR WASH ON GAS TURBINE TEMPERATURE OF TURBOFAN ENGINE ]]>
<![CDATA[Abubakar, Abubakar]]>;
<![CDATA[Wijayanti , Widya]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.9
<![CDATA[In this study, the impact of compressor washing on improving the performance and engine life of a turbofan engine is analyzed. The purpose of this research is to determine the outcomes resulting from the compressor wash treatment, as well as the patterns and characteristics of engine deterioration rates in each block cycle following the wash. It also aims to identify the optimal timing for conducting a compressor wash to achieve the most favorable results and maximize the on-wing life of the engine. This research was conducted using an analytical method, which involved analyzing the data received from the Aircraft Communications Addressing and Reporting System (ACARS) to assess the influence of engine performance and deterioration characteristics on the conducted compressor wash. One set of temperature margin data analyzed reveals the benefits of washing in terms of the turbine gas temperature (TGT) margin. It shows a 7°C increase in the TGT margin, indicating improved performance, but a 3.1°C decrease in the unrecoverable margin. Furthermore, the analysis of the margin data per 100 cycles indicates that the rate of deterioration is steeper during the initial 300 cycles compared to the subsequent cycles. Based on these findings, it is recommended to conduct the compressor washing process at around 300 cycles to maximize engine life and achieve enhanced efficiency.]]>
<![CDATA[ECO – INNOVATIVE CARBURIZING: ENHANCING STEEL ST 37 WITH ALABAN CHARCOAL AND EGGSHELL CATALYSTS ]]>
<![CDATA[Ahmad Robittah]]>;
<![CDATA[Suprapto, Wahyono]]>;
<![CDATA[Widodo, Teguh Dwi]]>;
<![CDATA[Wirawan , Willy Artha]]>;
<![CDATA[Sabitah, A’yan]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2025.006.01.13
<![CDATA[This study examines the enhancement of St 37 steel through an eco-friendly carburization process using Alaban charcoal and eggshell catalyst. The agriculture sector in South Kalimantan, Indonesia, depends largely on metal tools made from low-carbon steel, which need greater hardness and durability. Traditional carburization techniques are costly and often lead to uneven carbon distribution. This research investigates the use of Alaban wood charcoal and local duck eggshell waste as carburizing agents. The experiment involved varying the weight ratio of charcoal to eggshell powder, then carburizing at 950°C for two hours, followed by water quenching. The results indicated a notable increase in surface carbon content, diffusion depth, hardness, and microstructure of St 37 steel. The optimal combination, achieving the highest surface hardness of 947 HV and a carbon diffusion depth of 1.0 mm, was found at an eggshell catalyst concentration of 30%. All samples exhibited a microstructural change to martensite. These results demonstrate the potential of using agricultural waste to enhance steel properties, promoting more sustainable and cost-effective industrial practices.]]>
