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STUDI NILAI KALOR BRIKET CANGKANG KELAPA SAWIT SEBAGAI BAHAN BAKAR PADAT Hudri Fauzun; Hendri Nurdin; Remon Lapisa; Sri Riski Putri Primandari
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 3 (2024): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i3.714

Abstract

The fuel oil energy source used is currently experiencing a fuel supply shortage, so it is necessary to have alternative energy sources with renewable and environmentally friendly raw materials to anticipate the increasingly depleting oil fuel sources. One of them is utilizing biomass energy with agricultural waste as raw material which is processed into briquettes. The material used in this research is palm oil shells using tapioca adhesive which will be processed into briquettes as an alternative fuel. Through the process of making briquette products with variations in the composition of the mixture provided, quality calorific value can be achieved. The research results showed that the highest calorific value of palm oil shell briquettes was found in the 80% : 20% mixture variation, namely 13428.5904 Kj/Kg, and the lowest calorific value was found in the 60% : 40% mixture variation, namely 9139.76928 Kj/Kg .
Analisis Pengaruh Model Turbulen dalam Simulasi CFD Centrifugal Fan menggunakkan Ansys Bagas Santoso; Delima Yanti Sari; Hendri Nurdin; Fitrah Qalbina
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : 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-? Standard, k-? RNG, k-? Realizable and k-? SST. The goal was to find the most optimal turbulent model of the centrifugal fan around the impeller. The impeller has an angle (,?-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-? 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-? 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 Andre Maryonda; Nelvi Erizon; Irzal Irzal; Hendri Nurdin
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : 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.
Comparison of NaOH and Na2CO3 as absorbents for CO2 absorption in carbon capture and storage technology Fadhilah Ikhsan Dinul; Hendri Nurdin; Dieter Rahmadiawan; Nasruddin; Imtiaz Ali Laghari; Tarig Elshaarani
Journal of Engineering Researcher and Lecturer Vol. 2 No. 1 (2023): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v2i1.23

Abstract

CO2 gas is a greenhouse gas that causes global warming. Greenhouse gases are gases in the atmosphere that can absorb and reflect infrared radiation from the Earth's surface. Currently, the energy demand still depends on fossil fuels. On the other hand, CO2 emissions from burning fossil fuels continue to increase and contribute as greenhouse gases to the atmosphere. CO2 capture is an effort to reduce the burden of CO2 emissions into the atmosphere and is part of the Carbon, Capture, and Storage (CCS) protocol. The CO2 absorption process applied in the chemical industry is one of the CO2 absorptions using NaOH and Na2CO3 solutions as absorbents. This research aims to determine the effect of absorbent flow rate on the percentage of absorbed CO2. The method used in this research is the SLR (Systematic Literature Review) method to identify all available research. The absorbent flow rate variations used are 1 liter/minute, 1.5 liters/minute, 2 liters/minute, 2.5 liters/minute, and 3 liters/minute. The absorption process using NaOH absorbent is capable of absorbing CO2 gas with a maximum absorption of 95.52% and a minimum of 79.14%. Meanwhile, in the Na2CO3 absorbent, it is capable of absorbing CO2 gas with a maximum amount absorbed of 72.45% and a minimum of 35.47%.
Tensile strength study of mensiang (scirpuss grossus) fibre composites with unsaturated polyester resin matrix Evan Hakiim; Hendri Nurdin; Zainal Abadi; Wei-Ting Zhuang
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.
Co-Authors - Primawati A, Affandi A, Yufrizal Abdul Ghani Rahman Abdur Rahman Abimayu, Dimas Addha Ilham Ade Manda Afabek, Randa Algery, Fauzan Ambiyar, Ambiyar Ambyar Ambyar Amri Ramadhan S Anaperta, Yoszi Mingsih Andre Kurniawan Andre Kurniawan Andre Maryonda Andri, Rezky Anggar Sulaiman Zega Anna Niska Fauza Arafat, Andril Ardi, Julio Lukmanul Arwizet Arwizet, Arwizet Arya Rudi Nasution Azmul Fauzi Bagas Santoso Bagas Santoso Budi Priyono Budi Syahri Bulkia Rahim Dani Harmanto Darmawi Darmawi Darmawi Darmawi Dayu Alfaridh Delima Yanti Sari Denda Afri Juliadi Dieter Rahmadiawan Dieter Rahmadiawan Dimas Abimayu Dimas Riadi Dinul, Fadhilah Ikhsan Doni Kris Saputra Dori Yuvenda Dwi Sakti Putra Eko Indrawan Elshaarani, Tarig Erika Afandi Evan Hakiim F, Fadhlurrohman Fadhilah Fadhilah Fadhilah Ikhsan Dinul Fajar Fitra Fathi Aulia DZ Fauza, Anna Niska Fauzan Azima Febri Hanafi Febri Prasetya Fitra, Fajar Fitrah Qalbina Fitrah Qalbina Gifan Ainul Mukhrim Habibie, Farhan Hakiim, Evan Handayani, Meisuri Harahap, Doa Harmanto, Dani Hasanuddin Hasanuddin Hasanuddin WS Hastuti Hastuti Hastuti Hastuti Hendra Irawan Hidayat, Nailul Hudri Fauzun Ilham Rinaldo Putra Imtiaz Ali Laghari Indradewa, Rhian Irshan Sepriza Irzal Irzal Islamimahdi Islamimahdi Jasman Java Danilio Saputra Junil Adri Kassimov, Farid Kenzhaliyev, Bagdaulet Kenzhaliyevich Kenzhaliyev, Elnar khairul umurani Laghari, Imtiaz Ali Lilik Darwito M Febriyan Baruna Putra M Fikri Mansur Mansur Muhamad Thaufiq Pinat Muhammad Firdaus Muhammad Firdaus Muhammad Ikhsan Koto Muhammad Iqbal Iski Muhammad Rizki Mulianti Nabawi, Rahmat Azis Nasruddin Nasruddin Nelvi Erizon Nidya Meliza Putri Niko Adima Brawira Novendri Chairul Nur Ichsan Abdillah Nurhasan Syah Ogif Pradinata Putra Pramudya, Aldhi Primandani, Sri Rizki Putri Primawati Primawati, Primawati Purwantono Purwantono Purwantono, Purwantono Putra, Randi Purnama Rahmad Robby Alzam Rahmadiawan, Dieter Rahmat, Febri Rajul Halim Perdana Ismet Ramadhan, Arya Famas Ramadhan, Ozi Refdinal, Refdinal Refdinal, Refdinal Remon Lapisa Resqy Dwicandra Reza Ramadhan Prabulingga Rifelino Rifelino Riski Camarta Rizky Ema Wulansari Rodesri Mulyadi Rudy Anarta Saddikin, M Saputra, Ilham Dwi Sasma Susanti Sayyid Rasyid Habibie Siregar, Batu Mahadi Sitorus, Purnama Anandi Sri Riski Putri Primandari Sri Rizki Putri Primandari Syahril Syahril Syahril Syahril Syauqi Arjunanda Tarig Elshaarani Toto Sugiarto Tri Ramadhan Tsung-Liang Wu Vani Permata Sari Wagino Wanda Afnison Wari, Alan Waskito Waskito Waskito Waskito Waskito, Waskito Wei-Ting Zhuang Ya, Kyaw Zay Yoga Andika Yolli Fernanda Yoszi Mingsih Anaperta Yufrizal Yufrizal Yusra M. Nur Yusuf Caniago Zainal Abadi Zainal Abadi Zhuang, Wei-Ting