https://jurnal.uhn.ac.id/index.php/mechanical <div id="ts-body">SPROCKET Journal of Mechanical Engineering (SJoME) is a scientific journal that contains the publication of research works, design and theoretical studies in the field of mechanical and mechanical engineering, including energy conversion, manufacturing, materials, product design design and technology management.&nbsp;SJoME is published by the Mechanical Engineering Study Program, Faculty of Engineering, HKBP Nommensen University, Medan, Indonesia.&nbsp;SJoME is published 2 (two) times a year, namely in February and August. <p>SPROCKET Journal of Mechanical Engineering (SJoME) in accordance with the Decree of the Director General of Higher Education, Research, and Technology Number 164 / E / KPT / 2021, dated December 27, 2021 concerning Accreditation Ratings for Scientific Journals period II of 2021, which states that SPROCKET Journal of Mechanical Engineering (SJoME) is accredited by SINTA 5 starting from Vol 1 No. 1 to Vol 5 No. 2.</p> </div> Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan en-US SPROCKET JOURNAL OF MECHANICAL ENGINEERING 2685-8916 <p>Authors who publish with<strong>&nbsp;</strong> SPROCKET JOURNAL OF MECHANICAL ENGINEERING agree to the following terms<strong>:</strong></p> <ul> <li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under <a href="https://creativecommons.org/licenses/by/4.0/deed.en">a&nbsp;Creative Commons Attribution 4.0 International License</a> . that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.</li> <li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See&nbsp;<a href="http://opcit.eprints.org/oacitation-biblio.html">The Effect of Open Access</a>).</li> </ul> <p>&nbsp;</p> https://jurnal.uhn.ac.id/index.php/mechanical/article/view/1602 <p>terakhir ini. Hal ini penting dikarenakan dasar dalam perhitungan konsumsi energi pada proses penguapan air maupun umumnya kehilangan massa cairan di suatu reservoir. Pada penelitian ini dilakukan simulasi secara transient, yang bertujuan untuk mengetahui laju penguapan air laut yang terjadi pada sebuah reservoir atau bak penampung, dengan asumsi radiasi matahari yang dianggap telah diserap oleh bak sebagai fluks panas. Simulasi yang digunakan menggunakan metode CFD (<em>computational Fluid Dynamics</em>) multifasa (<em>Volume of Fluid</em>) dengan perangkat lunak Ansys Fluent. Kondisi batas yang digunakan pada simulasi ini dengan kondisi nilai radiasi sebesar 600 W/m2. Pada hasil simulasi dapat diperolah nilai laju perpindahan massa dan laju perpindahan panas, dengan nilai rata-rata laju selama 1 jam, untuk tanpa kipas 2,78671×10-6 kg/s dan 2049,18 J/s.</p> Hendrik V Sihombing Himsar Ambarita Horas S Siagian ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 2024-08-30 2024-08-30 6 1 1 9 10.36655/sprocket.v6i1.1602 https://jurnal.uhn.ac.id/index.php/mechanical/article/view/1616 <p>Utilization of solar energy sources is an alternative energy to save fossil energy. The use of solar panels has been widely implemented both at home, buildings and open fields. The most sources of sunlight are on the beach, because the beach area has an area without exposure to sunlight. Against this background, this study aims to create an instrument for measuring light intensity offshore. The method used is by reviewing literature studies, making light intensity measuring instruments, testing on the beach and analyzing data. The results obtained during the initial test were that the highest light intensity was in minute 10 of 50578 lx with the highest power of 399.5662 W/m2 at 360C. In testing at 09.00-09.30 WIT with a temperature of 460C produced the highest light intensity was in the 15th minute of 56145 lx with the highest power of 443.5455 W/m2. In testing at 10.00-10.30 WIB with a temperature of 490C, the highest light intensity was at 30 minutes of 57853 lx with the highest power of 457.0387 W/m2. And testing at 11.00-11.30 WIB with a temperature of 500C produced the highest light intensity at 75 minutes of 62845 lx with the highest power of 496.4755 W/m2. The conclusion of this study is that a microcontroller-based light intensity measuring instrument can be developed and used in offshore light intensity measurements.</p> <p>&nbsp;</p> <p><strong>Keyword:</strong> Light Intensity, Microkontroller, Sensor BH-1750.</p> Abel Alfarez ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 2024-08-30 2024-08-30 6 1 10 19 10.36655/sprocket.v6i1.1616 https://jurnal.uhn.ac.id/index.php/mechanical/article/view/1369 <p>Persaingan di industri semakin ketat, menuntut perusahaan untuk mengoptimalkan semua sumber daya yang dimiliki untuk menghasilkan produk yang berkualitas tinggi. Dalam bidang Keselamatan dan Kesehatan Kerja (K3), sangat bersiko terhadap karyawan. Cannu Coffee &amp; Eatery adalah perusahaan yang bergerak di bidang industri F&amp;B. kecelakaan&nbsp; kerja kerap terjadi di Cannu Coffee &amp; Eatery. Semenjak perusahaan ini berdiri ada beberapa kasus kecelakaan kerja yang terjadi seperti tangan tersayat pada saat memotong daging dengan pisau, tergelincir dikarenakan lantai basah, dan terciprat minyak panas. Dari permasalahan diatas tentu sangat memungkinkan akan timbulnya resiko tinggi kecelakaan kerja yang dapat mendatangkan kerugian dan menghambat produktivitas industri. Untuk mengatasi permasalahan tersebut penelitian ini menggunakan metode Job Safety Analysis (JSA) dan Hazard Identification Risk Assessment and Risk Control (HIRARC) yang digunakan sebagai analisa dari kecelakaan kerja yang terjadi di Cannu Coffee &amp; Eatery. Dari penelitian ini resiko kecelakaan dapat dikelompokan menjadi bahaya yang level resikonya kecil, level resikonya sedang dan&nbsp; level resikonya tinggi.</p> Masdania Zurairah Siregar Nabila Yudisha Muhammad Hartama Rian Dama Muhammad Prasha Risfi Silitonga ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 2024-08-30 2024-08-30 6 1 20 29 10.36655/sprocket.v6i1.1369 https://jurnal.uhn.ac.id/index.php/mechanical/article/view/1624 <p>Pada penelitian ini penulis menganalisis pengaruh arah panel surya terhadap arus, tegangan, dan intensitas cahaya matahari di Kalimantan Timur dengan sudut kemiringan 25°. Penelitian ini melibatkan tiga variabel arah panel surya: timur, utara, dan barat. Data yang &nbsp;diperoleh melalui pengukuran langsung intensitas cahaya matahari, arus, dan tegangan yang dihasilkan oleh panel surya pada berbagai waktu dalam sehari. Hasil penelitian ini menunjukkan bahwa orientasi panel surya memiliki pengaruh signifikan terhadap efisiensi konversi energi surya. Pada arah timur dan barat menghasilkan arus dan tegangan yang lebih tinggi pada pagi dan siang hari, sedangkan dengan arah utara menghasilkan performa yang lebih stabil sepanjang hari. Temuan ini dapat menjadi referensi penting bagi pengoptimalan pemasangan panel surya di wilayah tropis seperti Kalimantan Timur.</p> Andi Nugroho Wilson Sabastian Nababan Eko Yohanes Setyawan Siwan Ediamanta Peranginangin Suriady Sihombing ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 2024-08-30 2024-08-30 6 1 30 35 10.36655/sprocket.v6i1.1624 https://jurnal.uhn.ac.id/index.php/mechanical/article/view/1625 <p>This study aims to determine the effect of holding time variations on the structure, electrical and magnetic properties of ZnO doped with Ni. The fabrication of the samples used the solid state reaction method with a high speed shaker mill and continued with sintering at temperature of 900^oC with variable holding time of 2, 4 and 8 hours. Samples doped with Ni have a hexagonal wurtzite polycrystalline structure. The holding time treatment causes a shift in the diffraction peak in the Ni-doped ZnO. This indicates a change in crystal parameters such as lattice parameters and crystal size. The crystal size of Zn_0.97Ni_0.03O increased with increasing holding time. The longer the holding time, the longer the diffusion that occurs from the heat effect, so that the small grains have sufficient time to combine (agglomerate) into large grains. The resistivity of Zn_0.97Ni_0.03O samples with holding time of 2, 4 and 8 hours was obtained increasing which caused a decrease in the conductivity value of Zn_0.97Ni_0.03O.</p> Golfrid Gultom ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 2024-08-30 2024-08-30 6 1 36 41 10.36655/sprocket.v6i1.1625