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All Journal Sinergi JMPM (Jurnal Material dan Proses Manufaktur) Teknomekanik Asean Journal of Science and Engineering (AJSE) Mechanical Engineering for Society and Industry
Kolakoti, Aditya
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Application of Particle Swarm Optimization in Duty Cycle Adjustment for Optimization of Oxyhydrogen Generator Pertiwi, Fungky Dyan; Anindito, Dhimas Cahyo; Habibi, Ilham; Kusumadewi, Tri Vicca; Setiyo, Muji; Kolakoti, Aditya
ASEAN Journal of Science and Engineering Vol 4, No 2 (2024): AJSE: September 2024
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v4i2.70509

Abstract

The duty cycle of pulse width modulation is used to adjust the current of the oxyhydrogen generator with on-off square signals. These signals are essential for an oxyhydrogen gas generator to reduce thermal operation, improve the quality of oxyhydrogen gas, and enhance efficiency. A framework combining particle swarm optimization and regression analysis was proposed to determine the minimum temperature and production time of oxyhydrogen gas while maximizing efficiency using a single input, the duty cycle. The optimization results indicated that the duty cycle for the optimum solution remained within the upper and lower temperature boundaries. In this study, particle swarm optimization successfully provided valuable insights for practical applications in renewable energy technologies.
Preparation and mechanical characterization of natural polymer composite material obtained from fox tail palm seeds Kolakoti, Aditya; Geeri, Satish; Rochman, Muhammad Latifur; Setiyo, Muji
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.007

Abstract

This experimental investigation reveals the preparation of natural composite material from foxtail palm tree seeds. The fruits from the foxtail palm tree are used for the extraction of oil, and the by-product of the extraction process is freely dumped. This study attempts to utilize the waste by-product of foxtail palm tree fruit as a valuable natural composite material. The fabrication was done using the hand lay-up method for the proposed reinforcement (4% and 8%) of filler materials. The obtained composite materials are subjected to significant mechanical characterization of tensile behaviour, flexural property, and hardness. In addition, the morphological study was also carried out by the scanning electron microscope (SEM). The results show that, as the reinforcement percentages of filler material increase, the mechanical properties are improved. This may be due to the uniform dispersion of natural fibres in the polymer. The tensile strength was improved by 22.43% and 29.08% for 4% and 8% filler reinforcement. Similarly, the stiffness property was improved by 9.32% for 4% reinforcement and 18.68% for 8% reinforcement when compared with neat composite. The SEM images reveal the failure analysis, bonding strength and fibre pull-out in the composites. Finally, the foxtail fruit fibre shows promise as a reinforcing agent in composite materials, improving their mechanical properties and making them suitable for various applications requiring strength, stiffness, and resistance to deformation.
Enhancing heat transfer performance of automotive car radiator using camphor nanoparticles: experimental study with bibliometric analysis Kolakoti, Aditya; Setiyo, Muji; Husaeni, Dwi Novia Al; Nandiyanto, Asep Bayu Dani
Teknomekanik Vol. 6 No. 2 (2023): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v6i2.25072

Abstract

In this study, an attempt was made to investigate the heat transfer performance of a four-wheeler automotive radiator using a novel coolant system. To support this study, we also added bibliometric analysis to show the importance of this study. In the experiments, camphor nanoparticles (sizes of 511 nm) with various loadings (i.e. 2, 4, 6, and 8%) were mixed with deionized water (DW) to create a coolant. The experiments were conducted at different heat convection processes (i.e. 0.5, 1.45, and 3.7 m/s). The significant heat transfer performance parameters, such as Reynolds number (Re), Nusselt number (Nu), overall heat transfer coefficient (U), and heat transfer rate (Q), were examined. The Fourier Transform Infrared results revealed the presence of significant functional groups in the coolant system. camphor nanoparticles dispersed in DW were stable for more than 8 hours. At 70 ᵒC, the novel coolant (2% camphor nanoparticles in DW) exhibits better Re, Nu, U, and Q than that using pure DW or other loadings of nanoparticles (e.g. 4, 6, and 8%). The high percentage of camphor nanoparticles in DW restricts the fluid flow, resulting in a drop in overall heat transfer performance. Finally, low-cost, easily available, and eco-friendly camphor nanoparticles (2%) are suggested as a better choice in lieu of high-cost metallic and non-metallic nanoparticles as an additive in the coolant system.
Sustainable energy for future needs: An imperative for a greener tomorrow Kolakoti, Aditya; Setiyo, Muji
Mechanical Engineering for Society and Industry Vol 4 No 1 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.11728

Abstract

According to Worldometer, around 8.1 billion inhabitants survive on mother earth, and earth provides the most essential resources like oxygen and water for survival. However, humanity has taken advantage of available resources on earth and has started exploring them with the available technology and machinery. As a result, the rapid consumption of exhaustible energy sources like fossil fuels, the purposeful clearing of forested lands, water pollution, industrialization, and waste disposal into the environment are increasing faster. Due to these activities, the earth's ecosystem is in great danger and requires an immediate remedy to safeguard it. Therefore, relying on renewable energy sources and promoting sustainable energy for future needs is one of the possible solutions to prevent environmental damage.
Vapor compression refrigeration system with air and water cooled condenser: Analysis of thermodynamic behavior and energy efficiency ratio Setiyo, Muji; Rusdjijati, Retno; Habibi, Ilham; Rochman, Muhamad Latifur; Purnomo, Bagiyo Condro; Pertiwi, Fungky Dyan; Waluyo, Budi; Ismail, Rifky; Kolakoti, Aditya
Teknomekanik Vol. 7 No. 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v7i2.31972

Abstract

This study presents the analysis of thermodynamic behavior and energy efficiency of a vapor compression refrigeration system with two types of condensers: air-cooled (ACC) and water-cooled (WCC). The main objective is to assess the system performance by comparing the Coefficient of Performance (COP) and Energy Efficiency Ratio (EER) under both condenser configurations. During a 12-hour test period, data on refrigerant pressure, temperature, and electrical energy consumption were collected and analyzed. The results show that the WCC system outperforms the ACC system, showing a 5.7% increase in heat rejection and a 4.2% increase in cooling capacity. In addition, the WCC system exhibits a lower compressor duty cycle and consumes less electrical energy, resulting in a higher total EER of 5.658 compared to ACC of 1.945. These findings suggest that integrating a water-cooled condenser into a refrigeration system can significantly improve energy efficiency and reduce operating costs, making it a viable option for commercial applications in tropical regions.
Recent Advances in Nanocomposite for Lightweight Automotive Materials: A Systematic Review Setiyo, Muji; Habibi, Ilham; Saifudin; Sari, Nasmi Herlina; Kolakoti, Aditya
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 10 No. 2 (2026): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v10i2.33785

Abstract

Vehicle weight reduction is one of the most effective strategies for lowering energy consumption and emissions in both internal combustion and electric vehicles. Nanocomposites have attracted attention because they can significantly improve material properties at very low reinforcement contents. This study maps recent research on nanocomposites for lightweight automotive materials through a systematic review of 88 Scopus-indexed research articles published between 2021 and 2026. The number of articles increased more than sevenfold, from 4 in 2021 to 30 in 2026, and 59.1% of them appeared in the last two years. Polymer matrix nanocomposites dominate the field (45 articles; 51.1%), followed by aluminum matrices (27; 30.7%) and magnesium matrices (11; 12.5%). Graphene and its derivatives, together with carbon nanotubes (CNTs), are the most frequently studied reinforcements, while stir casting and its variants remain the main fabrication route for metal matrices. Nanoscale reinforcement, typically at 0.25–3 wt% in polymers and 1.5–10 wt% in metals, was reported to increase tensile strength by approximately 14–54% and to reduce the coefficient of friction by up to approximately 38%. One life cycle study reported a 28% reduction in component weight compared with a glass fiber composite. Three emerging research directions stand out: hybrid reinforcement, multifunctional materials (flame retardancy, electromagnetic interference shielding, and structural energy storage), and the use of machine learning for property prediction. A critical analysis also found that only 5.7% of the articles reported specific properties, that is, strength or stiffness per unit mass, even though these quantities determine the actual benefit of weight reduction. Most results were obtained on laboratory specimens (indicative technology readiness level 3–4), and the gains are bounded by an optimum filler content above which agglomeration reduces strength. The main open challenges include the dispersion and wettability of nanoparticles, large-scale production, recycling, and the lack of validation on real vehicle components.
Co-Authors Asep Bayu Dani Nandiyanto Bagiyo Condro Purnomo Budi Waluyo Dhimas Cahyo Anindito Fungky Dyan Pertiwi Geeri, Satish Husaeni, Dwi Novia Al Ilham Habibi, Ilham Kusumadewi, Tri Vicca Muhammad Latifur Rochman Muji Setiyo Nasmi Herlina Sari Rifky Ismail Rochman, Muhamad Latifur Rusdjijati, Retno Saifudin