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All Journal Otopro Indonesian Community Journal Aceh International Journal of Science and Technology
Rasyid, Akhmad Hafizh Ainur
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PEMILIHAN PARAMETER PENGECATAN UNTUK MENDAPATKAN KETEBALAN LAPISAN CAT YANG TEPAT UNTUK PERMUKAAN TIDAK MERATA Rasyid, Akhmad Hafizh Ainur; Santoso, Dany Iman; Utama, Firman Yasa
Otopro Vol 12, No 2 (2017)
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v12n2.p82-87

Abstract

Proses pengecatan merupakan proses pelapisan dengan tujuan melindungi dan esetika dari produk yang dilapisi. Agar didapatkan permukaan hasil pengecatan yang bagus diperlukan kondisi permukaan yang bagus pula. Kondisi permukaan yang ada sedikit cacat akan tertutupi bila ketebalan lapisan cat yang menempel pada produk cukup tebal. Ketebalan lapisan cat ditentukan oleh jarak penyemprotan, kecepatan langkah ayun, tekanan spray gun dan tekanan tabung residu. Campuran bahan cat dengan pengencer juga berpengaruh pada ketebalan lapisan namun setiap produsen bahan cat telah memberikan rekomendsi perbandingan campuran yang terbaik. Peneliti menentukan jarak penyemprotan 100;150;200 mm, kecepatan langkah ayun 0,381;0,448 m/s, tekanan spray gun 10;12 Psi dan tekanan tabung residu 25;20 Psi. Menggunakan thickness gauge didapatkan ketebalan cat sebesar 0,1 mm pada jarak penyemprotan 100 mm, kecepatan langkah ayun 0,381 m/s, tekanan spray gun 12 Psi dan tekanan tabung residu 20 Psi.
PENGARUH PENAMBAHAN FREE DAN FIX DRAG REDUCING PADA BILAH TERHADAP KINERJA TURBIN ANGIN SAVONIUS Siregar, Indra Herlamba; Effendy, Moch; Rasyid, Akhmad Hafizh Ainur
Otopro Vol 13, No 2 (2018)
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v13n2.p63-66

Abstract

Indonesia dengan karekteristik angin yang sering berubah-ubah arah serta kecepatannya tergolong rendah, memerlukan sebuah desain turbin angin yang sesuai. Turbin angin Savonius adalah jenis turbin yang sesuai dengan karekteristik angin di Indonesia. Pada penelitian sekarang bilah turbin angin Savonius di tambahi peralatan yang berfungsi untuk mengurangi drag terutama pada returning blade, peralatan ini ada yang bergerak bebas disebut free drag reducing  dan ada pula dengan sudut tertentu disebut fix drag reducing. Hasil penelitian memaparkan bahwa penambahan peralatan yang bergerak bebas pada bilah menghasilkan kinerja turbin angin yang lebih baik daripada penambahan peralatan dengan sudut tertentu pada bilah.
PEMILIHAN PARAMETER PENGECATAN UNTUK MENDAPATKAN KETEBALAN LAPISAN CAT YANG TEPAT UNTUK PERMUKAAN TIDAK MERATA Rasyid, Akhmad Hafizh Ainur; Santoso, Dany Iman; Utama, Firman Yasa
Otopro Vol 12, No 2 (2017)
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v12n2.p82-87

Abstract

Proses pengecatan merupakan proses pelapisan dengan tujuan melindungi dan esetika dari produk yang dilapisi. Agar didapatkan permukaan hasil pengecatan yang bagus diperlukan kondisi permukaan yang bagus pula. Kondisi permukaan yang ada sedikit cacat akan tertutupi bila ketebalan lapisan cat yang menempel pada produk cukup tebal. Ketebalan lapisan cat ditentukan oleh jarak penyemprotan, kecepatan langkah ayun, tekanan spray gun dan tekanan tabung residu. Campuran bahan cat dengan pengencer juga berpengaruh pada ketebalan lapisan namun setiap produsen bahan cat telah memberikan rekomendsi perbandingan campuran yang terbaik. Peneliti menentukan jarak penyemprotan 100;150;200 mm, kecepatan langkah ayun 0,381;0,448 m/s, tekanan spray gun 10;12 Psi dan tekanan tabung residu 25;20 Psi. Menggunakan thickness gauge didapatkan ketebalan cat sebesar 0,1 mm pada jarak penyemprotan 100 mm, kecepatan langkah ayun 0,381 m/s, tekanan spray gun 12 Psi dan tekanan tabung residu 20 Psi.
Pelatihan Hidroponik Sebagai Upaya Peningkatan Keterampilan dan Ketahanan Pangan Siswa di Sekolah Indonesia Davao (SID) Filipina Adiwibowo, Priyo Heru; Saepuddin, Ahmad; Rasyid, Akhmad Hafizh Ainur; Palupi, Aisyah Endah; Muhaji, Muhaji; Arsana, I Made; Wailanduw, A Grummy; Siregar, Indra Herlamba; Ansori, Aris; Irfa’i, Mochamad Arif; Zakiyya, Hanna; Purwanto, Aris
I-Com: Indonesian Community Journal Vol 5 No 1 (2025): I-Com: Indonesian Community Journal (Maret 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/icom.v5i1.6680

Abstract

Hydroponics training at the Indonesian School of Davao (SID) Philippines aims to improve students' skills in growing crops using soilless methods. Hydroponics is an effective solution for sustainable agriculture in countries with limited land. This training was carried out in three stages: pre-activity, implementation, and evaluation. The pre-activity stage identifies problems in implementing modern agricultural technology in schools. During implementation, students gain theoretical and practical understanding of hydroponic systems, including planting media selection, plant care, and nutrient management. Evaluation is carried out to assess the skills students acquire after training. Participants' response to the training reached 97%, reflecting high satisfaction and interest in the material presented. These findings confirm that hydroponic training can be an effective solution in preparing students to face the challenges of sustainable agriculture in the future. The results of the training show that students are able to manage hydroponic systems independently and understand the importance of environmentally friendly agriculture, as well as the skills needed to face agricultural challenges in the future.
Effect of Angle of Attack on Drag and Lift Coefficients on Naca Airfoil for Wind Turbine Application Adiwibowo, Priyo Heru; Purwanto, Aris; Rasyid, Akhmad Hafizh Ainur; Saepuddin, Ahmad
Aceh International Journal of Science and Technology Vol 14, No 2 (2025): August 2025
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.14.2.47327

Abstract

The development of renewable energy is expected not only to reduce dependence on fossil fuels but also to support the transition toward cleaner and more sustainable energy systems in the future. The combustion of fossil fuels significantly contributes to greenhouse gas emissions, thereby accelerating global climate change. Recognizing these limitations and negative environmental impacts, researchers and energy experts have begun to explore and develop various alternative energy sources that are more environmentally friendly and sustainable. Among them, wind energy is one of the most promising and widely available clean energy resources. The efficiency of wind turbines can be enhanced by optimizing the aerodynamic characteristics of their blades. This study examines the aerodynamic properties of three distinct NACA airfoil profiles: NACA 0012, NACA 2412, and NACA 3412. These profiles differ in camber magnitude and distribution, yet they share a maximum thickness of 12% of the chord length. Computational Fluid Dynamics (CFD) simulations were conducted using ANSYS Fluent with angles of attack ranging from -20 to 20. The results reveal that the NACA 2412 airfoil demonstrates the best aerodynamic performance at an angle of attack of 5, achieving the highest lift-to-drag ratio (L/D).
Co-Authors A. Grummy Wailanduw Ahmad Saepuddin Aisyah Endah Palupi Aris Ansori Dany Iman Santoso Effendy, Moch Firman Yasa Utama I Made Arsana Indra Herlamba Siregar Irfa’i, Mochamad Arif Muhaji Muhaji Priyo Heru Adiwibowo Zakiyya, Hanna