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Hamdan Akbar Notonegoro
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FLYWHEEL : Jurnal Teknik Mesin Untirta
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 24077852     EISSN : 25977083     DOI : https://doi.org/10.36055/fwl.v0i0.
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 222 Documents
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Performance Analysis 2000cc Gasoline Engine by Using Hydrogen – Pertamax Fuel Mixture Caturwati, Ni Ketut; Sudrajad, Agung; Raditya, Putu Evan
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34187

Abstract

The use of motor vehicles has led to an increased demand for fossil energy sources as the main fuel and produce air pollution. Therefore, there is a need for alternative energy which is hydrogen. This research, we analyzes the performance of a 2000cc gasoline engine with hydrogen as a mixture with Pertamax fuel, varying the engine speeds at 2000, 2500, 3000, and 3500 rpm. The variable of hydrogen flow rates at 0.6, 1.2, and 1.8 lpm. The experimental results obtained that the addition of hydrogen as a dual fuel have an impact on the increase in the alternator power output in 15% at the difference 0 lpm and 1.8 lpm of hydrogen flow rates. The thermal efficiency also increases with the addition of hydrogen reach to 10.46%. The specific fuel consumption shows decrease at 2000 rpm on 34% between 0 lpm and 1.8 lpm. The emissions of HC and CO were decrease, while CO2 increases with the addition of hydrogen.
The Effect of Artificial Aging on Al 6061/SiC Composite Produced by Thixoforming Ula, Shofiatul; Alhamidi, A. Ali; Sunardi, Sunardi; Satria, Dhimas; Yusuf, Yusvardi; Setiawan, Ipick; Verdana, Narendra Putra
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34503

Abstract

Thixoforming improves material properties better than conventional methods through the formation of non-dendritic or rounded structures. This study aimed to optimize the mechanical properties of Al 6061/SiC composites by adding Mg as a wetting agent through stir casting, thixoforming, and artificial aging processes. The holding time during the artificial aging process was varied to investigate its effect on microstructure, hardness, and impact toughness. SEM analysis revealed a more uniform distribution of SiC particles with increasing holding time, indicating the effective formation of Mg2Si precipitates. The maximum hardness of 48.5 HRB and the highest impact toughness of 0.022 J/mm² were obtained at the longest holding time of 3 hours. This indicates that the formation of homogeneous Mg2Si precipitates during the artificial aging process significantly contributed to the improvement of the composite's mechanical properties.
Performance Improvement of Coal Dust Briquettes: Application of Taguchi Design and Pareto Analysis for Optimizing Key Processing Variables Dharta, Yuli; Wahyudie, ilham Ary; Sukanto, Sukanto; Husman, Husman; Yuliyanto, Yuliyanto; Oktriadi, Yudi
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34541

Abstract

The main challenge in the briquette-making process is selecting the appropriate and proportionate reinforcement or adhesive. The chosen adhesive must not only provide strong adhesion but also be compatible with other components. Briquettes are alternative fuels in solid form, made from carbon-containing materials with a high calorific value, allowing them to burn for an extended period. Coal is one of the alternative materials that can be used for briquettes. The choice of adhesive type and composition directly influences the compressive strength, thermal stability, and durability of briquettes in various environmental conditions. This study aims to investigate how process parameters affect the compressive strength of briquettes produced from coal powder reinforced with molasses, to improve the efficiency of the briquette production process. The methodology used in this study is the Taguchi method. The process parameters include four factors, each with three levels, tested with three replications: the percentage of reinforcement or adhesive at levels of 10%, 12.5%, and 15%; pressure at levels of 8 MPa, 10 MPa, and 12 MPa; temperature at levels of 70 °C, 90 °C, and 110 °C; and heating time at levels of 60 minutes, 90 minutes, and 120 minutes. To enhance the comprehensiveness of the study, several factors, including the moisture content of the briquettes, have also been examined. The results indicate that the temperature during the drying process is the most significant factor influencing the production of these briquettes.
Efficiency Analysis of Incinerator Combustion Chamber Using Variations in the Number of Burners with the Computational Fluid Dynamics Method Siana, Nezar Azali; Mujiarto, Sigit; Purnomo, Sigit Joko; Saleh, Arif Rahman
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.34890

Abstract

Waste is a global environmental problem that is increasing with population growth and consumption. Based on SIPSN 2023 data, waste generation in Indonesia reached 69.9 million tons, dominated by food waste (41.60%) and plastic (18.71%), with households as the main source (44.37%). Incinerators are an effective solution to reduce waste volume by 50–90% and have the potential to generate energy through heat conversion. This study designed an incinerator with a capacity of 45 kg with a double burner system fueled by Compressed Natural Gas (CNG) to optimize the combustion process and reduce emissions. The design was carried out using SolidWorks 2022, while flow and emission simulations were carried out using ANSYS 2023 R1. This study compares the combustion performance of single-burner and double-burner systems based on CO and CO2 exhaust emissions. Simulation results show that the single-burner system produces a CO mass fraction of 0.6144 and CO₂ of 0.1452, while the double-burner system produces a CO fraction of 0.6845 and CO₂ of 0.0910. The combustion efficiency of the single-burner system was recorded at 19.1%, while the double-burner system only achieved 11.7%. These values indicate that the single-burner system has more complete and efficient combustion than the double-burner system, in terms of exhaust.
Experimental Study of the Effect of Air Flow Rate Variation on the Three-Phase Flow Characteristics in the Uplift Section of an Airlift Pump Rahayu, Yunita; Mujiarto, Sigit; Fajarningrum, Nurmala Dyah; Saleh, Arif Rahman
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.35139

Abstract

A three-phase airlift pump is a pumping system that utilizes compressed air to lift fluid and solid particles, widely used due to its efficiency and minimal mechanical components. The injected air flow rate plays a crucial role in influencing the flow pattern, velocity, and phase distribution within the system. This study aims to examine the effect of varying air flow rates on the three-phase flow characteristics in an airlift pump with a 15° injector angle, including the critical condition, superficial velocity of each phase, flow patterns, and changes in solid, gas, and liquid hold-up values. Experiments were conducted with air flow rates ranging from 30 to 60 LPM and a water column height of ¾ h. Data were analyzed using image processing techniques to calculate flow velocity and hold-up. Based on the experimental results, it was found that the solid hold-up increased from 0.7592 to 0.9030, and gas hold-up from 0.0531 to 0.0819, while liquid hold-up decreased from 0.1877 to 0.0151 as the air flow rate increased. The superficial liquid velocity also rose from 0.056 m/s to 0.158 m/s, with the value recorded at 50 LPM representing the most optimal operating condition of the airlift pump and serving as the ideal reference for system operation. This research is expected to contribute to the development of airlift pump applications in industrial applications..
Design of Universal Jig for Standardization and Efficiency of Frame Production Chopper Motorcycle Halim, Dimas Ardiansyah; Murdiono, Mohamad Bimo; Suparno, Joko; Aziizudin, Achmad; Purnomo, Agung; S, Arbye; Yogiswara, Cahyo Wibi; Putra, Setya Drana Harry
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.28487

Abstract

Chopper motorcycle frames had a fierce and macho impression on users. The frame was characterized by high handlebars, long front legs and a low seat. Chopper motorcycles were suitable for casual riding. Therefore, the Chopper frame must be specially designed or custom-made. Making the frame required a jig to maintain precision and dimensional accuracy in accordance with the original frame. Making a universal jig allowed craftsmen to make Chopper frames according to market demand without leaving the center balance on the frame. The jig manufacturing process included material selection, measurement, material cutting, machining, jig calibration, jig assembly, welding, checking and finishing. The welding process used argon TIG welding. The use of the jig shortened the frame manufacturing time by 2 times faster and minimizes wasted frame material due to dimensional errors.
Boiler Efficiency Analysis with Indirect Method PT. Indonesia Power UBP PLTU Lontar Unit 2 Pamungkas, Candra Nur; Hidayati, Noor; Abadi, Cecep Selamet
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.29165

Abstract

Boiler efficiency is one of the important factors in determining the performance and environmental sustainability of PLTU. This study aims to analyze the factors that cause a decrease in boiler efficiency unit 2 PLTU Lontar. This study uses the indirect method (heat losses), it is found that the efficiency is 81.05%, and several large heat losses are found, namely L2: losses due to moisture content in coal of 5.01%, L3: losses due to hydrogen content in coal of 6.92% and comparison of heat losses data of PLTU Lontar boiler in 2015 and 2024. The analysis shows that the efficiency of the Lontar PLTU boiler has decreased from 82.96% in 2015 to 81.05% in 2024. This decrease is caused by several factors, namely: Increase in L3 (loss due to hydrogen content in coal) and L5 (loss due to unburned carbon).Decrease in L9 (loss due to sensible heat in fly ash).Decrease in coal quality. Efforts to improve boiler efficiency need to be made, such as, maintaining coal quality is very important to maintain boiler efficiency, and conducting regular boiler maintenance. The implementation of these measures is expected to improve the boiler efficiency of PLTU Lontar, reduce pollutant emissions, and improve environmental sustainability
The Effect of Quenching Process on Chrome and Carbon-Coated Carbon Steel on Hardness Level and Microstructure Monica, Zelvia
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.35117

Abstract

Along with the development of mining industry technology and heavy equipment industry which are in dire need of wear resistant steel, wear resistant steel applications are demanded to be able to meet the needs of the industry. In excavator buckets, wear resistant steel is really needed due to its continuous use rubbing against the soil material, therefore the steel is carried out hardfacing. As an alternative, a Chrome coating and the addition of Carbon powder can be modified on the E-7018 electrode which is commonly used for joining metals. After going through the hardfacing process again the Quenching process is expected to further increase the hardness of the surface of the material. The material in this study was low carbon steel with 9 specimens, 1 raw material specimen, 4 specimens by cooling the Coolant and 4 specimens without treatment. Each is divided into electrodes coated with Chrome, Carbon, Chrome + Carbon. Based on the research results obtained, it is known that the addition of Carbon to low carbon steel that has been cooled by cooling shows the martensitic microstructure and produces the highest hardness of 348.98 VHN compared to the electrodes that are not treated. In specimens E-7018 without treatment showed microstructure of ferrite and produced the lowest hardness of 191.26 VHN.
Analysis of Cooling Load in Room GK1-103, Institut Teknologi Sumatera Mohd Zailani, Muhamad Iman Bin; Ahmad Zamri, Nur Alia Batrisyia Binti; Rajagukguk, Gabriel Xaverius Englando; Hafidz, Mochammad Januar; Wahyudi, Aldrian; Sitinjak, Jerniko; Silitonga, Dicky J.
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.30227

Abstract

The cooling load, which refers to the amount of heat energy that must be removed to maintain a comfortable indoor environment, is affected by various factors such as external temperature, building design, occupancy levels, and internal heat sources. Accurate cooling load calculations help engineers and designers create systems that meet comfort demands without excessive energy consumption, aligning with ITERA's goals for sustainable development and environmental responsibility.
Experimental Study on the Effect of Air Flow Rate Variation on the Performance of a Three-Phase Airlift Pump With an Injector Angle of 15° Maulana, Rizki; Fajarningrum, Nurmala Dyah; Hayati, Nur; Saleh, Arif Rahman
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.35498

Abstract

Rivers in Indonesia are heavily polluted, with the main source of pollution coming from industrial waste, including poorly managed mining activities. The airlift pump is used to lift liquid or sediment from a water reservoir that has a lower elevation through a vertical pipe that is partially submerged in the water. This research aims to determine the effect of air flow rate on the performance of the airlift pump during operation under three-phase flow conditions. The performance of the airlift pump is examined through several parameters: superficial velocity, effectiveness, efficiency, and flow patterns. In this study, a tank measuring 50x50x50 cm and a 2.54 m tall acrylic pipe are used as the riser to facilitate the lifting of three-phase flow to the separator component that separates the three phases located at the end of the riser. With a submergence ratio of ¾ h or 1.905 m and using variations of air flow rates of 30, 40, 50, and 60 LPM. The results of this research confirm that increasing air flow rate enhances superficial velocity in all three phases. At air flow rates of 30-50 LPM, the efficiency increases from 4.18 ×10-3 % and peaks at 5.14 ×10-3 %. At 60 LPM, it decreases to 4.88 ×10-3 %. The highest effectiveness reaches 1.281 at an air flow rate of 60 LPM. The optimal flow pattern occurs in slug flow and transitions towards churn flow.

Page 22 of 23 | Total Record : 222

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