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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Rekayasa Material, Manufaktur & Energi JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) JURNAL PENDIDIKAN TAMBUSAI Journal of Applied Engineering and Technological Science (JAETS) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik Jurnal Vokasi Mekanika ALSYS : Jurnal Keislaman dan Ilmu Pendidikan MASALIQ: Jurnal Pendidikan dan Sains Jurnal Aplikasi IPTEK Indonesia Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development
Nurdin Hendri
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Negeri Padang
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Analisis Pengaruh Model Turbulen dalam Simulasi CFD Centrifugal Fan menggunakkan Ansys Santoso, Bagas; Sari, Delima Yanti; Nurdin, Hendri; Qalbina, Fitrah
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.811

Abstract

The study was conducted to determine the airflow in the backward type centrifugal fan using Computational Fluid Dynamics (CFD) simulation. This type of fan is often used in various industries due to its high efficiency in moving air or gas. In CFD simulation, the selection of the right turbulent model is very important to obtain simulation results that are reliable, efficient, and relevant to real conditions. The study used four different turbulent models to look at their effects on pressure distribution, flow velocity, and fan efficiency. The turbulent models used are k-ε Standard, k-ε RNG, k-ε Realizable and k-ω SST. The goal was to find the most optimal turbulent model of the centrifugal fan around the impeller. The impeller has an angle (,β-1.) of 35,260 with a rotation speed of 301,069 rad/s. The simulation was carried out by meshing about 500,000 mesh elements for a balance between accuracy and computing needs. Validation was carried out by comparing the simulation results of Ansys Student R1 2024 and Solidwork. Of the four turbulent models tested, k-ε RNG provided the most accurate results, with an efficiency difference of only 1.3% compared to Solidworks. This model manages to capture better variations in pressure and flow velocity, especially in turbulent areas and around the impeller. These results show that the k-ε RNG turbulent model provides closer results than other models. These findings are important for the optimization of centrifugal fan design and emphasize the importance of selecting the right turbulent model in numerical simulations.
Hubungan Penerapan Aspek K3 Terhadap Hasil Belajar Siswa Kelas XI Teknik Pengelasan Pada Mata Pelajaran Las Busur Manual (SMAW) di SMK N 1 Guguk Maryonda, Andre; Erizon, Nelvi; Irzal, Irzal; Nurdin, Hendri
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.842

Abstract

The following study is intended to find if it exists an association among these application about K3 aspects along with student learning outcomes of the welding engineering workshop at SMK Negeri 1 Guguk. During the practice, it was found that there was a lack of understanding and implementation of K3 aspects by the Welding Technology students, as well as insufficient attention to and maintenance of K3 equipment. This research applies correlational methods with quantitative techniques. A total of 55 class XI TLAS students in the SMAW Welding Engineering subject were to be used as subjects. Sampling method adopted in this study is the purposive sampling technique. The data testing results in this study used the product-moment correlation, which showed that the calculated r score was higher than the table r value, indicating a positive relationship between the variables. The significance score was low, leading to the acceptance of the alternative hypothesis (Ha). Thus, the research hypothesis is recognized at a sufficient interpretation level. The data testing results show that the implementation of K3 aspects contributes to student learning outcomes, although the contribution is not dominant. Other aspects that influence student learning outcomes were not studied in this research. Outcome of the data examination lead to theconclusion that application about K3 aspects shows a direct impact on the results of learning of class XI Welding Engineering students in the manual arc welding subject at SMK Negeri 1 Guguk.
Tensile strength study of mensiang (scirpuss grossus) fibre composites with unsaturated polyester resin matrix Hakiim, Evan; Nurdin, Hendri; Abadi, Zainal; Zhuang, Wei-Ting
Journal of Engineering Researcher and Lecturer Vol. 4 No. 1 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i3.164

Abstract

The mensiang (scirpuss grossus) is a plant that grows on moist and watery land. Mensiang plants are commonly used by the society to produce mats or bags that have a strong and durable texture. This mensiang plant has fibres that can be used as reinforcement in polymer composites as a substitute for synthetic fibres. In composite manufacturing, one of the important factors in determining strength is the fraction between fibre and matrix. This study was conducted to determine the effect of different volume fractions of composites on the tensile strength of mensiang fibre reinforcement. Extraction of fibre from the stem of the mensiang plant was done manually by combing, so that the fibre was obtained. The fibres were then naturally dried by the sun for 2-3 days. The composite manufacturing process was carried out by using the hand lay-up method. Specimens and tensile testing procedures refer to the ASTM D638 standard. Several specimens were made by varying the fibre and matrix fractions. The test results showed that the 12.5% fibre volume fraction had the highest tensile strength. In this study there was no chemical treatment on the fibres before the lamination process, thus, this can be suggested for future researchers to study on the effect of chemical treatment on mensiang fibres on fibre bonding with the matrix.
Calorific Value of Palm Kernel Shell Charcoal (PKSC) Briquette as Solid Fuel Hendri Nurdin; Waskito Waskito; Fadhilah Fadhilah; Toto Sugiarto; Andre Kurniawan; Yolli Fernanda; Rudy Anarta; Fathi Aulia DZ
Journal of Applied Engineering and Technological Science (JAETS) Vol. 6 No. 2 (2025): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v6i2.6336

Abstract

The need and utilization of energy in society exceed available production. This condition requires acceleration and efforts to find solutions through the diversification of palm shell biomass into solid fuel briquettes. Palm shells have the potential as biomass and renewable energy sources that are selected based on strategic, technical, and environmental considerations. Its utilization so far has only been burned directly which causes air pollution or used as road paving in oil palm plantations. The environmental impact is the accumulation of solid waste, and global warming in the Crude Palm Oil processing industry. The research objective was to obtain the calorific value of palm kernel shell briquettes with carbonization process. The experimental research method carried out by innovating palm kernel shell briquette raw materials at various percentage variances (90%: 10%, 85%: 15%, 80%: 20%, 75%: 25%) using tapioca adhesive. The technical parameters of briquettes making are molding pressure of 10 MPa, particle grains of 60 mesh, carbonization temperature of 400oC; 450oC; 500oC with a holding time of 1 hour. From this study, the calorific value of palm kernel shell charcoal (PKSC) briquettes at a concentration of 85%;15% at a temperature of 400oC was 25.86 MJ/kg with tapioca adhesives as the highest calorific value parameters. The technology used to make palm kernel shell charcoal briquettes is a potential development that can be recommended as a precursor to solid fuels. The impact of developing PKSC biomass energy briquettes is an innovation in utilizing waste to create solid fuels. The implications of this research can be applied by home industries or households. This research is a contribution to solutions in overcoming energy needs and deficiencies as a form of sustainable energy..
Evaluation and characterization of charcoal briquettes using damar binder for sustainable energy Nurdin, Hendri; Waskito, Waskito; Harmanto, Dani; Purwantono, Purwantono; Kurniawan, Andre; Yuvenda, Dori; Anaperta, Yoszi Mingsih
Teknomekanik Vol. 8 No. 1 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i1.33672

Abstract

Palm kernel shells have great potential as biomass and renewable energy sources. Its utilization has not been maximized which is only directly burned which causes air pollution. The accumulation of solid waste in the crude palm oil processing industry negatively impacts the environment. The research aims to determine the characteristics and quality of charcoal briquettes with palm kernel shell carbonization. The main findings of this study are the calorific value, water content, volatile matter, ash content, and fixed carbon in palm kernel shell charcoal briquettes with damar binder. The experimental research method was carried out by carbonizing the raw materials of palm kernel shell briquettes, applying various concentrations of damar binder mixtures. The technical parameters of briquette making were 10 MPa pressure, 60 mesh size, and different carbonization temperatures by furnace. The calorific and proximate were empirically measured by using a bomb calorimeter. This research produced palm kernel shell charcoal briquettes with a calorific value of 30.72 MJ/kg at a carbonization temperature of 500oC and concentration of 85%:15%, a moisture content of 5.18%, volatile matter of 32.72%, ash content of 2.81%, and fixed carbon of 57.90%. Palm kernel shell charcoal briquetting technology is potentially a recommended alternative solid fuel. Consequently, developing renewable energy that is environmentally friendly leads to achieve sustainable energy security. By utilizing waste, the negative impacts on the environment can be overcome and energy needs are also resolved.
Analysis of Mechanical Properties of Zn-0.5Fe-0.5Ag Alloy for Body Absorbed Implant Applications Ramadhan, Arya Famas; Arafat, Andril; Habibie, Farhan; Nurdin, Hendri; Mulianti, Mulianti
invotek Vol 24 No 3 (2024): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v24i3.1261

Abstract

Implants that can be absorbed by the body may be developed using alloy materials based on zinc (Zn), iron (Fe), copper (Cu), and silver (Ag). Zn-based alloys are known for their faster biodegradation rates, making them particularly suitable for biodegradable implant applications. The aim of this study is to determine the corrosion rate and hardness of Zn-0.5Fe-0.5Ag alloy specimens, as well as to examine the effects of heat treatment and the addition of Fe and Ag elements. The research utilizes a direct experimental observation method to analyze the mechanical properties of the Zn-0.5Fe-0.5Ag alloy. The microstructural analysis reveals differences between pure Zn specimens and Zn-0.5Fe-0.5Ag alloy specimens. In pure Zn, the largest grain size is observed in specimens without annealing treatment, while the smallest grain size is found in specimens annealed at 350°C. For the Zn-0.5Fe-0.5Ag alloy, the smallest grain size is observed in specimens annealed at 400°C, while the largest grain size appears in those annealed at 350°C. The addition of Fe and Ag to pure Zn significantly increases the hardness, with the hardness value rising from 33.77 HV (pure Zn) to 61.64 HV. In terms of corrosion, the highest corrosion rate in pure Zn was found in specimens without annealing. In contrast, the highest corrosion rate in the Zn-0.5Fe-0.5Ag alloy was observed in specimens annealed at 400°C. In conclusion, the addition of Fe and Ag elements, along with heat treatment, significantly affects the mechanical properties of the Zn-0.5Fe-0.5Ag alloy, improving both its hardness and influencing its corrosion behavior.
Peningkatan Produktivitas Masyarakat Tani di Nagari Bukik Sikumpa Lima Puluh Kota Melalui Penerapan Alat Pemipil Jagung Nurdin, Hendri; Waskito, Waskito; Hasanuddin, Hasanuddin; Sari, Delima Yanti
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 21, No 1 (2021): Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.0770

Abstract

Umumnya kehidupan masyarakat Indonesia dipedesaan adalah bercocok tanam padi yang merupakan sektor pertanian, selain itu ada juga yang berladang jagung. Tanaman jagung merupakan tanaman pangan nasional kedua setelah padi. Jagung sebagai pakan ternak, memiliki pangsa pasar tersendiri di tengah masyarakat sehingga nilai komoditas pasarnya sangat baik. Dampak kondisi ini yang membuat kekuatan bisnis jagung menjadi sangat menguntungkan sehingga masyarakat beralih menanam jagung. Berdasarkan hasil survei dan diskusi dengan kelompok tani Mawar di Nagari Bukik Sikumpa Limapuluh Kota yang sebagian besar masyarakatnya berkehidupan sebagai petani. Perkebunan di Nagari ini lebih cenderung kepada tanaman jagung dikarenakan lebih memilih dalam perawatannya dan harga pasar yang lebih stabil (harga jagung Rp 3.700 per kilogram). Masa pertumbuhan jagung sampai dapat di panen hanya membutuhkan waktu ± 4 bulan. Permasalahan yang terjadi di masyarakat menyangkut dengan proses pemipilan jagung setelah panen. Masyarakat petani kesulitan melakukan proses pengolahan jagung setelah di panen diantaranya mulai dari pengupasan kulit jagung, pemipilan butir jagung, dan penggilingan butir jagung. Biasanya masyarakat petani melakukan proses pengolahan secara manual dengan pekerjaan tangan sehingga membutuhkan waktu yang lama dan melibatkan banyak pekerja dengan pembiayaan upah yang besar. Penerapan teknologi berupa rancang bangun alat pemipil jagung yang disampaikan ke masyarakat petani sebagai upaya meningkatkan produktivitas sehingga berdampak terhadap kesejahteraan dan membangun wawasan masyarakat menjadi sasaran dalam kegiatan program kemitraan masyarakat.
Optimalisasi Penerapan Alat Pemipil Jagung Untuk Meningkatkan Produktifitas Masyarakat Di Nagari Sungai Rimbang Nurdin, Hendri -; Sari, Delima Yanti; Waskito, Waskito
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 21, No 3 (2021): Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.01690

Abstract

Dalam industri pengolahan pakan ternak, jagung merupakan bahan pokok yang mempunyai nilai ekonomis sangat tinggi. Jagung sebagai pakan ternak, memiliki pangsa pasar tersendiri di tengah masyarakat sehingga nilai komoditas pasarnya sangat baik. Kelompok tani Tampuniak Serumpun di Nagari Sungai Rimbang Kecamatan Suliki Lima Puluh Kota yang sebagian besar masyarakatnya berkehidupan sebagai petani. Permasalahan yang terjadi menyangkut dengan proses pemipilan jagung setelah panen. Masyarakat petani kesulitan melakukan proses pengolahan jagung setelah di panen diantaranya mulai dari pengupasan kulit jagung, pemipilan butir jagung, dan penggilingan butir jagung. Biasanya masyarakat petani melakukan proses pengolahan secara manual dengan cara dicungkil saja sehingga membutuhkan waktu yang lama dan melibatkan banyak pekerja dengan pembiayaan upah yang besar. Sentuhan teknologi di masyarakat dalam mengolah hasil panen jagung belum termanfaatkan secara optimal. Teknologi alat pemipil jagung yang diterapkan ke masyarakat sangat efisien. Kapasitas alat pemipil jagung dapat melakukan kerja sebanyak 433 kg/jam dimana penggerak yang digunakan motor bensin 6,5 PK dengan putaran 3600 rpm.. Efektifitas alat pemipil jagung dalam menghasilkan produksi dengan keutuhan butiran jagung hasil pemipilan mencapai 95 %. Optimalisasi penerapan alat pemipil jagung ini berdampak terhadap peningkatan produktivitas dan kesejahteraan hidup masyarakat di Nagari Sungai Rimbang sehingga kondisi ini dapat dipertahankan sinergi keberlanjutannya oleh masyarakat.
Analisis Rasio Pencampuran Bahan Bakar Dexlite dengan Biosolar terhadap Daya, Torsi dan Efisiensi Bahan Bakar pada Mesin Diesel Astron 4D56 Algery, Fauzan; Rizki Putri Primandari, Sri; Nurdin, Hendri; Mulianti, Mulianti
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dampak rasio pencampuran bahan bakar biodiesel terhadap efisiensi bahan bakar dan kinerja mesin pada mesin diesel Astron 4D56 menjadi permasalahan yang ingin dipecahkan oleh penelitian ini. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana kinerja dan penghematan bahan bakar mesin diesel Astron 4D56 dipengaruhi oleh rasio pencampuran bahan bakar Dexlite dengan Biosolar. Beberapa karakteristik, termasuk efisiensi bahan bakar, tenaga mesin, dan torsi, akan dinilai selama tahap percobaan proyek. Tiga variabel yang digunakan dalam penelitian ini, yaitu variabel independen, dependen, dan kontrol. Alat yang digunakan pada penelitian ini adalah dinamometer sasis. Dexlite 1:0, Biosolar 1:0, Dexlite dan Biosolar 3:7, Dexlite dan Biosolar 5:5, serta Dexlite dan Biosolar 7:3 merupakan campuran bahan bakar yang digunakan pada mesin 2000 Rpm dan 3000 Rpm. Data unjuk kerja mesin diesel Astron 4D56 dianalisis dengan menggunakan rasio sebagai berikut: 1:0. Analisis yang telah dilakukan didapatkan bahwa bahan bakar biosolar 1:0 lebih hemat biaya dan efisien untuk digunakan sehari-hari dan lebih unggul dalam hal tenaga dan torsi dengan selisih yang kecil. Dengan demikian, dapat dikatakan bahwa pembakaran bahan bakar biosolar dengan perbandingan 1:0 lebih signifikan dan efisien dibandingkan dengan pembakaran bahan sampel lainnya.
Peningkatan Hasil Belajar Mata Pelajaran Gambar Teknik Menggunakan Model Pembelajaan Project Based Learning Pada Siswa Kelas XI Teknik Pemesinan di SMK Dhuafa Padang Ponidi, Ponidi; Nurdin, Hendri; Purwantono, Purwantono; Yuvenda, Dori
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Perkembangan pendidikan kejuruan menuntut adanya inovasi dalam proses pembelajaran. Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa pada mata pelajaran Gambar Teknik melalui penerapan model Project Based Learning di kelas XI Teknik Pemesinan SMK Dhuafa Padang. Penelitian menggunakan metode Penelitian Tindakan Kelas (PTK) dengan model John Elliot yang terdiri dari 4 tahapan yaitu perencanaan, tindakan, pengamatan dan refleksi dalam dua siklus. Subjek penelitian adalah 14 siswa kelas XI Teknik Pemesinan. Pengumpulan data dilakukan melalui observasi dan tes, kemudian dianalisis secara kualitatif dan kuantitatif. Hasil penelitian menunjukkan peningkatan capaian kompetensi siswa dari siklus I ke siklus II. Pada siklus I, rata-rata hasil belajar siswa sebesar 72,31 dengan ketuntasan klasikal 57,1% (8 siswa tuntas). Pada siklus II meningkat menjadi rata-rata 81,85 dengan ketuntasan klasikal 92,86% (13 siswa tuntas). Penerapan Project Based Learning terbukti efektif dalam meningkatkan hasil belajar siswa pada mata pelajaran Gambar Teknik. Model pembelajaran ini mendorong siswa untuk lebih aktif dan kreatif dalam menghasilkan produk gambar teknik yang berkualitas.
Co-Authors - Primawati A, Affandi A, Yufrizal Abdillah, Nur Ichsan Abdur Rahman Abimayu, Dimas Afabek, Randa Algery, Fauzan Ambiyar, Ambiyar Ambyar Ambyar Anaperta, Yoszi Mingsih Andre Kurniawan Andre Kurniawan Andri, Rezky Arafat, Andril Ardi, Julio Lukmanul Arwizet Arwizet, Arwizet Arya Rudi Nasution Bagas Santoso Budi Syahri Bulkia Rahim Caniago, Yusuf Dani Harmanto Darmawi Darmawi Darmawi Darmawi Dayu Alfaridh Delima Yanti Sari Denda Afri Juliadi Dimas Abimayu Dinul, Fadhilah Ikhsan Dori Yuvenda Eko Indrawan Elshaarani, Tarig Erizon, Nelvi F, Fadhlurrohman Fadhilah Fadhilah Fajar Fitra Fathi Aulia DZ Fauza, Anna Niska Fauzi, Azmul Fauzun, Hudri Febri Prasetya Fikri, M Fitra, Fajar Fitrah Qalbina Fitrah Qalbina Habibie, Farhan Hakiim, Evan Handayani, Meisuri Harahap, Doa Harmanto, Dani Hasanuddin Hasanuddin Hasanuddin WS Hastuti Hastuti Hendra Irawan Hidayat, Nailul Indradewa, Rhian Irzal Irzal Irzal, Irzal Junil Adri Kassimov, Farid Kenzhaliyev, Bagdaulet Kenzhaliyevich Kenzhaliyev, Elnar khairul umurani Laghari, Imtiaz Ali Lilik Darwito M Febriyan Baruna Putra Mansur Mansur Maryonda, Andre Muhammad Firdaus Muhammad Firdaus Muhammad Rizki Mulianti Nabawi, Rahmat Azis Nasruddin Nelvi Erizon Niko Adima Brawira Pramudya, Aldhi Primandani, Sri Rizki Putri Primandari, Sri Riski Putri Primawati Primawati, Primawati Purwantono Purwantono Purwantono, Purwantono Putra, Ilham Rinaldo Putra, Randi Purnama Rahmad Robby Alzam Rahmadiawan, Dieter Rahmat, Febri Ramadhan, Arya Famas Ramadhan, Ozi Refdinal, Refdinal Refdinal, Refdinal Remon Lapisa Resqy Dwicandra Reza Ramadhan Prabulingga Rifelino Rifelino Riski Camarta Rodesri Mulyadi Rudy Anarta Saddikin, M Santoso, Bagas Saputra, Ilham Dwi Siregar, Batu Mahadi Sitorus, Purnama Anandi Sri Rizki Putri Primandari Syahril Syahril Toto Sugiarto Tsung-Liang Wu Wagino Wanda Afnison Wari, Alan Waskito Waskito Waskito Waskito Waskito, Waskito Wulansari, Rizky Ema Ya, Kyaw Zay Yoga Andika Yolli Fernanda Yufrizal Yufrizal Zainal Abadi Zhuang, Wei-Ting