Articles
<![CDATA[Pengembangan dan Implementasi Aplikasi Mobile Indogalaxy di Kelompok Budidaya Ikan Cambetta Cipulir dan Betta Fish As ]]>
<![CDATA[Desta Sandya Prasvita]]>;
<![CDATA[James Julian]]>;
<![CDATA[Zackharia Rialmi]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ Jurnal Abdikom Vol 1 No 1 (2022): JURNAL ABDIKOM ]]>
Publisher : <![CDATA[Fakultas Ilmu Komputer ]]>
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<![CDATA[Di awal pandemi Covid-19 tahun 2019, budidaya ikan cupang menjadi tren masyarakat Indonesia. Bisnis ikan cupang juga menjadi sangat menjanjikan pada saat itu. Namun dipertengahan tahun 2021, bisnis ikan cupang mulai meredup dan penjualan ikan cupang pun menurun. Kelompok budidaya Cambetta Cipulir dan Betta Fish As sebagai bagian dari kelompok budidaya ikan cupang di Jakarta menjadi contoh kelompok budidaya ikan cupang yang omset pejualannya menurun drastis hingga 70% ditambah lagi keterbatasan SDM di kelompok budidaya tersebut yang membuat persoalan ini belum terpecahkan. Beberapa penjual ikan cupang mencoba beralih dengan melakukan penjualan di media sosial seperti Facebook dan Instagram, namun munculnya larangan penjualan makhluk hidup dikedua aplikasi tersebut membuat transaksi ikan cupang semakin menurun ditengah pandemi. Solusi yang ditawarkan untuk permasalahan ini adalah dengan pengembangkan aplikasi berbasis android untuk memfasilitasi proses jual beli ikan cupang. Aplikasi ini diberi nama IndoGalaxy, dibuat dengan memperhatikan kemudahan user dalam menggunakan aplikasi, mulai dari pembuatan akun, mengupgrade akun, sampai melakukan jual beli dan lelang ikan cupang. Pada aplikasi ini juga memberikan fitur tambahan untuk jual beli dan lelang ikan cupang dengan video streaming. Agar aplikasi ini dapat digunakan oleh kelompok budidaya ikan cupang, pada pengabdian kepada masyarakat dilakukan juga dilakukan pelatihan khusus untuk menggunakan aplikasi. Hasil yang didapat dari kegiatan pemberdayaan antara lain memperbaiki sistem transaksi penjualan ikan cupang di Indonesia khususnya DKI Jakarta melalui pengembangan aplikasi berbasis android, meningkatkan omset atau pendapatan kelompok budidaya ikan cupang melalui aplikasi android, mengidentifikasi potensi masyarakat khususnya kelompok budidaya ikan cupang sebagai bagian dari upaya peningkatan kualitas SDM, dan mewujudkan konsep inovasi kreatif dalam usaha peningkatan perekonomian masyarakat kelompok budidaya ikan cupang.]]>
<![CDATA[Pengaruh slot kumparan pada kinerja permanent magnet synchronous motor dengan metode komputasi ]]>
<![CDATA[Ferdyanto]]>;
<![CDATA[Idris Marbawi]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 10 No 1 (2023): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika ]]>
Publisher : <![CDATA[LPPMPK-Sekolah Tinggi Teknologi Muhammadiyah Cileungsi ]]>
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DOI: 10.37373/tekno.v10i1.323
<![CDATA[Kesadaran mengenai isu-isu energi dan lingkungan, industri otomotif mulai mengembangkan kendaraan listrik. Banyak negara dan produsen mobil besar telah banyak berinvestasi dalam penelitian kendaraan listrik. Di industri ada persyaratan dinamika torsi maksimum dan respon torsi kondisi tunak yang lebih baik. Ada gelombang yang lebih rendah pada fluks magnet motor dan torsi yang dihasilkan. Permanent magnet synchornous motor (PMSM) menjadi salah satu pilihan yang tepat. PMSM menggunakan rare-earth magnets yang telah diterapkan sebagai traction motor untuk kendaraan listrik karena memiliki efisiensi yang tinggi dan kepadatan daya. Penelitian ini dilakukan untuk mengetahui tingkat efisiensi yang disajikan dari berbagai jenis motor sinkron dengan spesifikasi motor yang berbeda dari slot type of coil untuk mengetahui motor sinkron mana yang lebih efisien. Sehingga penelitian ini dapat membantu para pengguna motor sinkron dalam menentukan rancangan motor sinkron yang sesuai dengan kebutuhan. Penelitian berjalan dengan menggunakan proses komputasi pada software Ansys Electronic 2018. Seluruh proses komputasi yang dilakukan menggunakan metode Finite Element Analysis (FEA) untuk menyelesaikan permasalahan medan magnet dan medan listrik secara sederhana. Tipe motor dengan kode C1 memiliki nilai efisiensi tertinggi sebesar 95,251% berdasarkan rasio dari input power dan output power dengan spesifikasi besarnya nilai kuat medan magnet sebesar 0,93409 Tesla dan laju kuat arus persatuan panjang sebesar 5,3208 Ampere per meter, serta motor ini mendapatkan nilai efisiensi yang optimal pada kecepatan konstan motor sebesar 13300 rpm dan pada 75 derajat sudut putar rotor saat bekerja.]]>
<![CDATA[Optimalization Of Water Cooled Chiller Through Real-Time Data Analysis ]]>
<![CDATA[Muhammad Hanif Ulwani]]>;
<![CDATA[Fahrudin Ulwani]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v9i4.4841
<![CDATA[Building heating, ventilation, and air conditioning (HVAC) systems are among the most critical facilities with the most significant energy consumption. This article is based on the issues faced by PT X regarding the importance of visual analytics in energy audits and the performance evaluation of water-cooled chillers and cooling towers. The research methodology used is descriptive qualitative with a quantitative approach, where primary data is obtained based on observations of the machines owned by PT X. The approach taken involves the application of spreadsheets as a system for processing operational data and Looker Studio for real-time data visualization, aimed at understanding performance and energy consumption. The research results show that visualization with the Looker Studio platform provides a solution for PT X to improve the efficiency and effectiveness of the company's performance. In addition, the analysis conducted over six months on the coefficient of performance of a 2,000 TR water-cooled chiller showed a highest value of 21.5 and a lowest value of 13.31, while the highest efficiency of the cooling tower reached 98% and the lowest was 74%.]]>
<![CDATA[Thermal Stability Analysis of Cyperus Rotundus L Reinforced HDPE Composite in Polymer Composite Roof Tiles ]]>
<![CDATA[Muhammad Fakhri Hamzah]]>;
<![CDATA[Budhi Martana]]>;
<![CDATA[Fahrudin Ulwani]]>;
<![CDATA[Armansyah]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 9 No. 2 (2024) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v9i2.4972
<![CDATA[One of the materials that may be utilized in polymer matrix composites is high-density polyethylene (HDPE) plastic. Large amounts of HDPE plastic waste can harm the environment. Therefore, a solution is needed to overcome this problem. One solution to reduce plastic waste is to utilise it into polymer composite roof tiles. Roof tile surfaces are subjected to the greatest amount of solar heat radiation. This study aims to analyze the effect of variations in the composition of HDPE and teki grass on the value of solar radiation heat transfer and the value of thermal stability in polymer composite roof tiles. This research uses an experimental method by composites HDPE and teki grass with variations in the weight of teki grass used by 0%, 10%, 15%, and 20%. The results show that 20% teki grass composition in the composite produces low radiant heat compared to 0% teki grass composition which tends to be higher. according to the findings of the thermal stability test., The maximum thermal stability was seen in the composite with 0% fiber composition. While the most unstable composite is at 20% fiber composition with a 5% weight loss at 164.47oC and 10% at 278.27oC.]]>
<![CDATA[Design and Performance Testing of a 3D Printed Mini DC Powered Pump for Microbubble Generator ]]>
<![CDATA[Tulus Hidayat Yusanto]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Adi Winarta]]>;
<![CDATA[I Wayan Marlon Managi]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 8 No. 4 (2023) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v8i4.5078
<![CDATA[Centrifugal pumps are the most commonly utilized in industries, agriculture, and households. In the microbubble generator, the centrifugal pump is driven by a DC motor for efficiency. This research was conducted to determine the optimal centrifugal pump design for microbubble generators using 3D-printed PLA material. The pump drive uses a brushless DC motor. With impeller dimensions r1=16mm, r2=26mm, beta1=46.8, beta2=62.8, and number of blades = 8, the resulting head is 2m at a constant operational current of 3A and a flowrate of 0 L/m. The same operational current input yields a maximum flow rate of 14 L/min with a head of 0.5 m. Maximum head exists when there is no liquid on the outlet side. At current >= 6.5A, there is a deviation from the previously formed trend. The input power of 58W is generated when the maximum flow rate is 25L/m. Maximum efficiency can be achieved as the input current increases to <= 6.5A and 18L/m. At conditions >= 6.5A, efficiency decreases drastically as the input current increases. This centrifugal pump design can work optimally at a constant input current of 6.5A with an input power 58W for the microbubble generator.]]>
<![CDATA[The Influence of Mounting Angle on Gurney Flap on The Aerodynamics Performance of NACA 0015 Using CFD Method ]]>
<![CDATA[Mirza Fauzan Lukiano]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Waridho Iskandar]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 8 No. 4 (2023) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v8i4.5094
<![CDATA[Improving the airfoil aerodynamics is quite an essential aspect of the aviation industry. One method for improving airfoil aerodynamics involves applying passive flow control techniques. The effect of using the gurney flap as passive flow control was explored through the CFD approach with the RANS control equation and incorporating k-epsilon as a turbulence model. The airfoil model utilized in this study was the NACA 0015 airfoil operating at a Reynolds number of 1×106. This study explored three different mounting angles of the gurney flap, namely 45°, 60°, and 90°. The outcomes show that adding the gurney flap has positive results in increasing the lift and drag of the NACA 0015. An airfoil with a mounting angle flap of 45° has an average percentage increase in Cl of 23%, followed by a mounting angle flap of 60°, which is 28%, and a percentage Cl of 45% for a mounting angle flap of 90°. Meanwhile, Gurney flaps with a mounting angle of 45° can increase Cd by an average percentage of 3%, while mounting angle flap at 60° increases the Cd percentage by 4% and 5% for a mounting angle of 90°. Moreover, fluid flow visualization with pressure and velocity contours was given at AoA 10º to determine its effect on increasing lift and drag on the NACA 0015 airfoil.]]>
<![CDATA[Leading Edge Modification of NACA 0015 and NACA 4415 Inspired by Beluga Whale ]]>
<![CDATA[James Julian]]>;
<![CDATA[Waridho Iskandar]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v8i2.5447
<![CDATA[This research modifies the leading-edge structure of NACA 0015 and NACA 4415 to resemble the nose of a beluga whale. The focus of this modification is to improve the airfoil's aerodynamic performance and investigate the changing fluid flow patterns. Numerical equation used is RANS combined with the k-epsilon turbulence model. Mesh independence test shows that mesh with 200 elements is the best mesh. Validation results reveal that CFD data can follow the trend of experimental data, especially on the AoA before the stall. There was a significant increase in Cl from NACA 0015 and NACA 4415 at AoA>9°. On the other hand, the modification also had a positive effect by lowering the Cd value. The modification also provides an advantage by increasing the maximum Cl/Cd value. Furthermore, the separation point data shows that the modification can delay the separation of the fluid flow in the airfoil. Modifications can cause an increase in pressure on the lower side and a decrease in pressure on the upper side. Through velocity contours and streamlines, the modifications can reduce the recirculation area. Overall, modifying the leading edge has positive impacts on the NACA 0015 and NACA 4415 airfoils.]]>
<![CDATA[Influence of Slat Size Variation as Passive Flow Control Instruments on NACA 4415 Airfoil Toward Aerodynamic Performance ]]>
<![CDATA[James Julian]]>;
<![CDATA[Rizki Aldi Anggara]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v8i2.5468
<![CDATA[Airfoil is a fundamental geometry in designing various aerodynamic objects. Passive flow control installation is essential in determining the airfoil's aerodynamic performance. The influence of variations in slat size as a passive flow control instrument is analyzed using the CFD method with a Reynold number of Re= 10^6. NACA 6641 airfoil was used as the slat geometry with size variations of 10%c and 16%c. Based on the computational results, variations in slat size have a substantial influence on the aerodynamic efficiency of the airfoil. Variations in slat size additional Cl ability to reach 20.6043% and 13.1917%, respectively. In addition, a 16%c slat can delay a stall until it reaches AoA >= 19°. Meanwhile, a 10%c slat can delay a stall until it reaches AoA >= 17°. However, variations in slat size also affect the resulting drag force. Slat measuring 16%c can addition Cd up to 50.9252%. Meanwhile, 10% c slat additional Cd up to 21.8389%. Based on the resulting lift-to-drag ratio curve, a 10%c slat has the lowest lift-to-drag ratio compared to a 16%c slat. However, a 10%c slat has the highest level of stability when compared to a 16%c slat installation and without a slat installation.]]>
<![CDATA[Aerodynamics Improvement of NACA 0015 by Using Co-Flow Jet ]]>
<![CDATA[James Julian]]>;
<![CDATA[Waridho Iskandar]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 7 No. 4 (2022) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v7i4.5557
<![CDATA[This study analyzes co-flow as active flow control in the object of the airfoil. NACA 0015 is the airfoil used in this study. The airfoil was then modified to add co-flow jet features. Co-flow jet was placed on the upper chamber to analyze its effect on airfoil performance. Further, the Co-flow jet was studied by varying the injected mass flow rate () in the injection slot. The variation of is 0.15, 0.20, and 0.25 kg/s. The study used CFD with the governing equation RANS. Reynolds Averaged Navier Stokes combined with turbulence model to solve all equations. Two equations for the turbulence model are used in this study. Specifically, this study discusses the aerodynamics of the airfoil, i.e., lift force, drag force, and fluid flow visualization, such as pressure contour and velocity contour. Co-flow jets can improve the aerodynamics of airfoils. The bigger the injected, the higher the lift coefficient increases. On the other hand, the drag force will be reduced as the number of injected fluid flow increases. Because of that, the airfoil efficiency will be better if using a co-flow jet. However, the Cl/Cdcurve peak shifts to smaller as the injection fluid flow are bigger. The fluid flow visualization by velocity contour on AoA=20° revealed that the co-flow jet could overcome separation.]]>
<![CDATA[Effect of Single Slat and Double Slat on Aerodynamic Performance of NACA 4415 ]]>
<![CDATA[James Julian]]>;
<![CDATA[Waridho Iskandar]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Armansyah]]>;
<![CDATA[Ferdyanto]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol. 7 No. 2 (2022) ]]>
Publisher : <![CDATA[Department of Marine Engineering, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v7i2.5626
<![CDATA[This study uses a Computational Fluid Dynamics (CFD) approach. The main object in this study is NACA 4415 with slat variations. The airfoil used as the slat is Eppler 421. Reynolds number in this study is 3Í106. This study uses an unstructured mesh with a triangular cell shape with 137824 elements. The use of slats can improve the aerodynamic performance of NACA 4415. NACA 4415 without slat stalled at AoA=16º. Stall on airfoils with a single slat and double slat occurred at AoA=20º. Slat can increase Cl in NACA 4415; however, the difference in Cl increase is not much different when using a single slat or double slat. An airfoil with a single slat, on average, can increase Cl by 20.9129%. The average increase in Cl for an airfoil with a double slat is 25.6878%. Single slat and double slat increase Cd. A single slat increased Cd with an average increase of 26.1109%, and the average increase in Cd for airfoils with double slat was 54.6152%. Single slat can produce a better Cl to Cd ratio than double slat, but the optimum AoA of double slat is 1º higher than single slat. Visualization of fluid flow at AoA=16° shows the fluid flow separation in the airfoil without a slat. The fluid flow separation can be handled well when NACA 4415 is given a single slat or double slat.]]>
