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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Journal of Applied Engineering and Technological Science (JAETS) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Didaktik : Jurnal Ilmiah PGSD STKIP Subang Jurnal Vokasi Mekanika Journal of Innovative and Creativity
Andre Kurniawan
Universitas Negeri Padang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Social Sciences Transportation Other

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Analisis Kinerja Boiler Pada PLTU Ombilin Berdasarkan Variabel Operasional Menggunakan Model Machine Learning Random Forest Devky Meinaldi Fernanda; Arwizet Arwizet; Yolli Fernanda; Andre Kurniawan
Journal of Innovative and Creativity Vol. 5 No. 2 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i2.2911

Abstract

Penelitian ini mengembangkan model prediksi beban PLTU menggunakan algoritma Random Forest dengan proses tuning hyperparameter melalui grid search untuk memperoleh konfigurasi optimal, yaitu n_estimators 200, max_depth 30, min_samples_split 10, dan min_samples_leaf 2. Model dilatih dan diuji menggunakan data historis dan data eksternal sebanyak 4.149 sampel, menghasilkan performa prediksi yang sangat baik dengan nilai MAE sebesar 0,6517, RMSE 1,4305, dan R-squared 0,9650. Hasil visualisasi scatter plot menunjukkan prediksi yang akurat dengan sebagian besar titik dekat garis ideal. Model ini membuktikan kemampuan generalisasi dan reliabilitas yang tinggi dalam memprediksi beban PLTU, sehingga dapat digunakan efektif dalam monitoring dan pengelolaan operasional pembangkit listrik.
Studi Karakteristik Biodiesel dari Minyak Kelapa dengan Katalis Basa Egis Egis; Sri Rizki Putri Primandari; Yolli Fernanda; Andre Kurniawan
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4421

Abstract

Indonesia masih sangat bergantung pada minyak kelapa sawit sebagai bahan baku utama biodiesel. Namun, untuk menjaga ketersediaan biodiesel dalam jangka panjang, perluasan basis bahan baku sangat diperlukan. Minyak kelapa muncul sebagai alternatif yang menjanjikan, mengingat kelapa telah menjadi bagian integral dari budaya masyarakat pesisir dan kepulauan di Indonesia. Penelitian ini bertujuan untuk mengevaluasi hasil uji karakterisitik biodiesel dari minyak kelapa berupa densitas, viskositas, dan angka asam kemudian dibandingkan dengan standar SNI 7182:2015. Metode penelitian ini melibatkan eksperimen melalui proses transesterifikasi dengan kondisi operasi pada suhu 60°C selama 60 menit, rasio molar metanol:minyak sebesar 6:1, dan variasi konsentrasi katalis basa KOH yaitu 0,5%, 1%, 1,5%, dan 2% dari berat minyak yang digunakan. Penelitian ini mengevaluasi karakteristik biodiesel dari minyak kelapa dengan variasi katalis basa KOH sebesar 0,5%, 1%, 1,5%, dan 2%. Hasil uji menunjukkan nilai densitas 882,93–884,75 kg/m³ dan viskositas 2,405–2,729 cSt, yang seluruhnya memenuhi standar SNI 7182:2015. Nilai bilangan asam sebesar 0,2805 mg KOH/g pada variasi 0,5% dan 1% juga sesuai dengan batas maksimum 0,5 mg KOH/g, sedangkan variasi 1,5% dan 2% melebihi standar. Dengan demikian, variasi katalis KOH 1% menghasilkan biodiesel dengan karakteristik terbaik sesuai standar SNI 7182:2015. Penelitian ini menyimpulkan bahwa penggunaan katalis KOH sebesar 1% merupakan kondisi optimal dalam produksi biodiesel dari minyak kelapa, menghasilkan biodiesel dengan kualitas terbaik. Hasil ini menunjukkan potensi biodiesel sebagai alternatif bahan bakar terbarukan yang ramah lingkungan dan berkontribusi pada diversifikasi energi nasional. Penelitian ini juga membuka peluang pengembangan energi berbasis sumber daya lokal.
Studi Simulasi Perpindahan Panas pada Kuningan dan Kayu dalam Pengujian Konduktivitas Termal Felia Maresta; Yolli Fernanda; Arwizet K; Andre Kurniawan
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4506

Abstract

Penelitian ini bertujuan untuk menganalisis kinerja alat uji konduktivitas termal pada material padat melalui pendekatan simulasi numerik menggunakan perangkat lunak ANSYS Steady-State Thermal. Kajian ini didasarkan pada metode Comparative Cut Bar yang mengacu pada standar ASTM E1225, di mana dua batang logam identik digunakan sebagai meter bar untuk memastikan aliran panas berlangsung secara linier dan satu dimensi. Sumber panas menggunakan Catridge Heater bertenaga 300 W dengan sistem pengendali suhu REX C-100, sedangkan pendinginan dilakukan menggunakan Heat Sink Water Block untuk menjaga kestabilan temperatur. Simulasi dilakukan pada dua jenis material spesimen, yaitu kuningan dan kayu, dengan variasi suhu sumber panas sebesar 150°C, 250°C, dan 350°C. Hasil simulasi menunjukkan bahwa distribusi temperatur pada kuningan bersifat lebih merata dibandingkan kayu karena nilai konduktivitas termalnya yang lebih tinggi. Nilai konduktivitas termal rata-rata yang diperoleh dari hasil simulasi adalah 109 W/m·K untuk kuningan dan 0,12 W/m·K untuk kayu. Temuan ini mengonfirmasi bahwa material dengan konduktivitas termal tinggi mampu mentransfer panas lebih efisien, sedangkan efektivitas sistem Heat Sink berperan penting dalam menjaga kestabilan suhu dan mengurangi kehilangan panas selama proses pengujian.
ANALISIS NUMERIK KINERJA TURBIN ANGIN DARRIEUS TIPE H TERHADAP VARIASI JUMLAH BLADE DAN KECEPATAN ANGIN DENGAN PENDEKATAN SIMULASI CFD Diki Afrianto; Andre Kurniawan; Yolli Fernanda; Fitrah Qalbina
Didaktik : Jurnal Ilmiah PGSD STKIP Subang Vol. 11 No. 04 (2025): Volume 11 No. 04 Desember 2025 In Press
Publisher : STKIP Subang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36989/didaktik.v11i04.8776

Abstract

This study aims to analyze the aerodynamic performance of an H-type Darrieus wind turbine by varying the number of blades and wind speeds using the Computational Fluid Dynamics (CFD) method. The turbine geometry was modeled using SolidWorks 2022 and numerically simulated with ANSYS Fluent 2025. The models consist of three-blade and four-blade configurations employing the NACA 0012 airfoil profile, tested under three different freestream wind velocities: 7 m/s, 9 m/s, and 11 m/s. The simulations were conducted within static and rotating domains to examine the fluid flow characteristics around the rotor, including velocity distribution, pressure field, torque, and power efficiency. The results show that increasing wind speed leads to more complex and turbulent flow behavior, characterized by the emergence of vortex shedding behind the blades. The torque coefficient (Ct) and power coefficient (Cp) increased with higher wind speeds in the three-blade configuration, indicating greater energy conversion efficiency compared to the four-blade configuration. Conversely, the four-blade turbine exhibited reduced efficiency at higher wind speeds due to increased drag forces and inter-blade interactions, which caused energy losses. Overall, the findings demonstrate that the three-blade H-type Darrieus turbine provides superior aerodynamic efficiency and rotational stability at medium to high wind speeds, whereas the four-blade configuration performs better at lower wind speeds by generating higher starting torque. These results are expected to serve as a reference for the development of efficient vertical-axis wind turbine designs suitable for wind conditions in Indonesia.
ANALISIS PENGARUH VARIASI JUMLAH SUDU TERHADAP KINERJA TURBIN CROSSFLOW DI PT XYZ Farhan Rahmat Putra; Andre Kurniawan; Yolli Fernanda; Randi Purnama Putra
Didaktik : Jurnal Ilmiah PGSD STKIP Subang Vol. 11 No. 04 (2025): Volume 11 No. 04 Desember 2025 In Press
Publisher : STKIP Subang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36989/didaktik.v11i04.8777

Abstract

This study aims to analyze the effect of blade number variation on the performance of a crossflow turbine used in the Micro-Hydro Power Plant (PLTMH) system at PT XYZ. The research was conducted using a numerical simulation approach based on Computational Fluid Dynamics (CFD) with Solidworks 2022 for geometry modeling and ANSYS Fluent 2025 R1 for fluid flow simulation. The variations of blade numbers investigated were 18, 24, 30, and 32 blades, with constant operating parameters including a flow rate of 0.03678 m³/s, a head of 0.3 m, and a rotational speed of 1500 rpm. The simulation results indicate that the number of blades significantly affects the torque, output power, and efficiency of the crossflow turbine. The configuration with 18 blades produced the best performance, achieving a torque of 21.39 Nm, an effective power of 3359.64 W, and an efficiency of 31.09%, while configurations with 24 and 32 blades showed a significant decrease in efficiency to around 6%. The analysis of velocity contours, pressure contours, and streamlines revealed that the 18-blade configuration provides a more stable and focused flow with uniform pressure distribution along the blade’s leading edge, resulting in greater tangential force on the runner shaft. In contrast, increasing the number of blades causes higher turbulence and energy losses. Therefore, it can be concluded that the 18-blade configuration is the most optimal design for achieving efficient crossflow turbine performance under the specified operating conditions.
Tinjauan Sarana dan Prasarana Bengkel Pemesinan di SMK Negeri 1 Padang Teuku Kamal Furqan; Budi Syahri; Syahril Syahril; Andre Kurniawan
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.828

Abstract

This article describes issue of mechanical worshop facilities and infrastructures at Vocational High School 1 Padang, aims to evaluate the availability and feasibility of facilities and infrastructure, in order to encourage learning process of mechanical engineering. This study reviews aspects related to the adequacy of mechanical workshop’s facilities and infrastructures including the existence and condition of machine, workshop space to other supporting infrastructure linked to work productivity and safety such as wall, lighting, ventilation, and floor conditions. Descriptive quantitative method was used with data collection techniques consisting of observation, interview with workshop managers, and documentation. The result revealed 87% of the facilities were classified as operational and available to support practical activities. Total percentage of feasibility for each workshop are: 90% of the lathe workshop, 77% of the miling machine workshop, 90% of the bench workshop, and 92 % of the welding and grinding machine workshop. The maximum percentage of facility feasibilities which is 100% has not been achieved, influenced by several factors related to the damage and unavailability of several items. In infrastructure, the ventilation is of standard size; lighting is appropriate and sufficient; the wall is of limited height and filled with large machines resulting in limited space for movement; the floor of the lathe workshop is inadequate with a number of cement patches on the floor cracks. Indicating the need for repairs and upgrades to increase the percentage of feasibility to maximum.
Effect of Hydrophobic Surface on Thermoelectric Cooling-Based Atmospheric Water Generator Abdillah Irfan; Andre Kurniawan; Arwizet K; Yolli Fernanda
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.843

Abstract

Water has a very important role in everyday life. Apart from humans, other living things also depend on water to survive. But there are still many areas in the world even in Indonesia still experiencing drought or clean water crisis. Therefore, new innovations are needed in producing water. One of the innovations is the atmospheric water generator (AWG) which utilizes the formation of water from air or condensation. The AWG in this research uses thermoelectricity as a cold source. Where thermoelectricity is less noisy, easy to obtain and assemble into a system, has a long service life without requiring maintenance. But thermoelectrics have disadvantages where cooling on thermoelectrics is less efficient. So to overcome this, I as the author use a hydrophobic surface as a condensation surface where it can accelerate condensation and increase the amount of water produced. In this study to see the comparison, tests were carried out using various types and surface areas.
Solar Home System Plant Menggunakan Gabungan Dari DVD dan Solar Panel Kresna Adi Prasetya; Arwizet K; Yolli Fernanda; Andre Kurniawan
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.860

Abstract

Indonesia is a tropical country that has great potential for harnessing and managing solar energy. At present, the technology of converting solar energy into electrical energy such as solar cells still has weaknesses in terms of cost. Therefore, this study aims to test the potential of solar energy by creating a solar home system plant using DVD and Zener diode. This solar home system plant using DVD has the advantage of using low cost and the power generated can be said to be sufficient. In addition, this product can be used as a substitute for solar cells if properly applied. This study uses an experimental method in a quantitative approach. In this study, the independent variable is the structure of the solar panel while the dependent variable is the amount of energy read by the voltmeter. This study uses the photoelectric principle. Where photoelectricity is an electron released from the surface of an object exposed to light. This study was carried out by looking at how much power could be generated by DVD and Zener diode. The results showed that DVD and Zener diode can generate electrical energy, but the results are still too small and a large number of DVDs are needed to generate more energy. So it can be concluded that DVD still cannot replace solar panels, but can be used as a tool to maintain the stability of solar panels.
Analisis LMTD dan Efektivitas terhadap Kinerja Pendinginan pada Desain Motor BLDC 5 kW Tipe Fluks Aksial Magnet Permanen Menggunakan Simulasi CFD Riezky Hidayattullah; Dori Yuvenda; Yolli Fernanda; Andre Kurniawan
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 4 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i4.908

Abstract

Axial flux type BLDC motors primary issue is the high operating temperature of the stator and winding components, which can lower system efficiency and hasten the deterioration of the quality of the insulation material. This study is to examine the effects of geometric alterations to the cooling system, such as axial fins on the housing side and curved fins on the casing, on the temperature distribution of a 5-kW axial flux permanent magnet BLDC motor. Convection and conduction heat transport in the cooling system were modeled using ANSYS Fluent software and computational fluid dynamics (CFD) simulation techniques. The Log Mean Temperature Difference (LMTD) and the cooling design's relative efficacy in comparison to the baseline state are the primary metrics that are examined. According to the simulation results, the maximum winding temperature may be lowered to 311 K and the cooling distribution in the rotor, casing, and housing can be improved by adopting curved fin casing and axial fin housing. As the temperature differential between the coolant and the motor surface narrows, the LMTD value drops from the initial condition (5.10 K to 13.94 K), suggesting a more effective heat transfer process. Furthermore, the cooling system's efficiency has more than doubled since its original design. Overall, the study's findings demonstrate that enhancing the cooler's geometric design can increase the BLDC motor's thermal performance and prolong component life.
Co-Authors Abdillah Irfan Akhmad Rais AM Mufarrih Arafat, Andril Arwizet Arwizet Arwizet Arwizet, Arwizet Budi Syahri Daffa Raihan Senthot Devky Meinaldi Fernanda Diki Afrianto Dori Yuvenda Egis Egis Fadhilah Fadhilah Farhan Rahmat Putra Fathi Aulia DZ Fauza, Anna Niska Felia Maresta Fitrah Qalbina Gusni Sushanti Kresna Adi Prasetya Krismadinata Krismadinata, Krismadinata Lilik Darwito M. Chalid Kurnia Moh. Nasir Hariyanto Muhammad Djoni Bustan Muhammad Raihan Mulianti Nanang Qosim Nur Ichsan Abdillah Nurdin Hendri Purwantono Purwantono Putra, Randi Purnama Refdinal, Refdinal Remon Lapisa Riezky Hidayattullah Rudy Anarta Sri Haryati Sri Rizki Putri Primandari Syahril Syahril Tarig Elshaarani Teuku Kamal Furqan Toto Sugiarto Usin Usin Wanda Afnison Waskito Willy Vernando Yolli Fernanda Yus Donald Chaniago Zainal Abadi Zakki Fuadi Emzain