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All Journal WIDYA TEKNIKA Turbo : Jurnal Program Studi Teknik Mesin Conference on Innovation and Application of Science and Technology (CIASTECH) JOURNAL OF SCIENCE AND APPLIED ENGINEERING JAST : Jurnal Aplikasi Sains dan Teknologi J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Jurnal Aplikasi Dan Inovasi Ipteks SOLIDITAS Jurnal Energi dan Teknologi Manufaktur (JETM) V-MAC (Virtual of Mechanical Engineering Article) Journal mechanical and manufacture technology (JMMT) Aceh International Journal of Science and Technology JASTEN (Jurnal Aplikasi Sains Teknologi Nasional
Dadang Hermawan
Fakultas Teknik, Universitas Widyagama, Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Journal : Turbo : Jurnal Program Studi Teknik Mesin

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Pengaruh prosentase larutan NaOH pada proses alkalisasi serat kulit pohon waru (hibiscus tiliaceus) sebagai reinforcement komposit terhadap kekuatan tarik serat tunggal Arief Rizki Fadhillah; Dadang Hermawan; Arie Restu Wardhani
TURBO [Tulisan Riset Berbasis Online] Vol 8, No 2 (2019): Jurnal Turbo Desember 2019
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (753.838 KB) | DOI: 10.24127/trb.v8i2.1159

Abstract

The utilization of natural fiber, nowadays, has employed as reinforcement of composite materials. Natural fiber can benefit the composite material because of the characters of fibre which is more environmental friendly, economics, lighter and stronger. There are many natural fibers that can be used as reinforcement of composite materials such as the bark fibers of Hibiscus Tiliaceus. Hibiscus Tiliaceus is one species of Hibiscus Tiliaceus that can be found in the mountains in Indonesia. This study aims to determine the tensile strength of a single fiber in Hibiscus Tiliaceus fiber with the additional various percentage of NaOH in the alkalization treatment. The alkalization treatment analyzes the alkali process of NaOH substance by 3%, 6%, 9%, 12%, and without treatment within the bark of Hibiscus Tiliaceus tree. The treatment was undertaken by soaking the NaOH substance in a duration of 120 minutes. After the NaOH solution was immersed, the bark fiber of Hibiscus Tiliaceus was washed with aquades until the solution reaches a pH of 7. The results of this study show the percentage of NaOH solution in the alkaline immersion process affects the tensile strength of a single fiber on Hibiscus Tiliaceus and the process of NaOH solution which has a release of 6% lignin, cellulose, and semilulose content. In addition, the NaOH treatment with a percentage of 6% can be the standard of the process of alkalizing the bark fiber of Hibiscus Tiliaceus which can be used for composite reinforcement. Therefore, 6% of NaOH can affect the bond between the Hibiscus Tiliaceus fibers as reinforcement and synthetic resins as a matrix which can increase the strength of the composite.
PENGARUH JUMLAH SUDU TERHADAP UNJUK KERJA 3D PRINT TURBIN AIR TIPE VORTEX Alvin Dio Nugroho; Purbo Suwandono; Dadang Hermawan; Arief Rizki Fadhillah
TURBO [Tulisan Riset Berbasis Online] Vol 11, No 1 (2022): Jurnal TURBO Volume 11 Nomor 1 Juni 2022
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i1.1935

Abstract

The potential of natural resources in the form of water energy is a renewable natural resource that is often used because it does not damage the environment and can be used continuously. This water flow has two types, namely laminar flow and turbulent flow, the forces generated from these two flows are also different. Turbulent flow tends to produce a greater force and can lift object masses better than laminar flow. Therefore, a vortex turbine has emerged which utilizes turbulent flow as a waterwheel drive, by directing laminar flow towards the cross section and converting it into turbulent flow by utilizing the force of gravity and The cross-sectional shape forms a whirlpool that can move a waterwheel and turn a turbine. The number of blades is very influential on the performance generated from the vortex turbine and affects the resulting output, be it voltage, current, rotational speed, torque and efficiency. In this study, the best results were shown on blades with a total of 6, at a rotational speed of 141.3 rpm; at the voltage shows the result of 0.28 volts; at current it produces 44 mA; at Torque (Nm) 0.22 Nm; and the efficiency is 76.5%.
Pemanfaatan dinding sebagai permukaan kondensasi untuk meningkatkan kinerja solar still double slope Nova Risdiyanto Ismail; Purbo Suwandono; Dadang Hermawan; Frida Dwi Anggraeni
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 1 (2023): Jurnal TURBO
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i1.2439

Abstract

Indonesia is an archipelagic country that often experiences drought, especially in the dry season. In the dry season, there is very abundant solar and seawater energy, so to overcome the problem, you can use solar still technology that utilizes solar energy to process seawater into condensate / fresh water economically. Various efforts are made to optimize the performance of solar stills, in this case the study aims to utilize the wall as a condensation surface to improve the performance of solar still double slope. The study was conducted experimentally by comparing: 1. Solar still double slope without utilizing the wall as a condensing surface, 2. Solar still double slope by utilizing the north side wall as a condensing surface, 3. Solar still double slope by utilizing the south side wall as a condensation surface, and 4. Solar still double slope by utilizing the north and south side walls as condensing surfaces. The results of the study using solar still double slope by utilizing the north wall as a condensing surface obtained the highest productivity of 1966 ml and the highest efficiency of 68.58%.
Co-Authors Achmad Maulana Risky Ahmat Herman Akhmad Farid Alvin Dio Nugroho Andy Hardianto Andy Hardianto Arie Restu Wardhani Arief Rizki Fadhillah Arif Rizki Fadhillah Bagus Wahyu Pratama Chiquitita Tiara Nisa Deky Framasta Deni Prasetio Febi Rahmadianto Frida Dwi Anggraeni Gatot Soebaktiyo Gatot Soebiyakto Hangga Wicaksono Leo Hutri Wicaksono Mohammad Julio Akbar Muhammad Agus Sahbana Muhammad Ghazali Arrahim Nasution, Annio Indah Lestari Nova Risdiyanto Ismail Nurida Finahari Purbo Suwandono Purnomowati, Wiwin Silviana Silviana Silviana Silviana Silviana Silviana Suriansyah Sabaruddin Sutrisno Sutrisno Suyatno, Agus Syahroni Wahyu Iriananda, Syahroni Wahyu