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All Journal Jurnal Mechanical Jurnal Informatika dan Teknik Elektro Terapan Turbo : Jurnal Program Studi Teknik Mesin Gorontalo Journal of Infrastructure and Science Engineering Journal of Engineering and Scientific Research (JESR) International Journal of Aviation Science and Engineering Journal of Innovation and Technology Journal of Vocational Education and Automotive Technology Journal of Applied Science, Engineering and Technology (J. ASET) Open Science and Technology Jurnal Polimesin Nemui Nyimah
Riszal, Akhmad
Universitas Lampung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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PEMBUATAN MESIN PEMIPIL JAGUNG ROTARY SPIRAL DENGAN SKALA INDUSTRI RUMAH TANGGA DI DESA SINDANG SARI KABUPATEN LAMPUNG SELATAN Yonanda, Ahmad; Harmen; Martinus; Amrizal; Riszal, Akhmad; Prasetyo, Dedy
Nemui Nyimah Vol. 3 No. 2 (2023): Nemui Nyimah Vol.3 No.2 2023
Publisher : FT Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/nm.v3i2.109

Abstract

Permasalahan pasca panen jagung yang dihadapi oleh petani desa Sindang Sari kecamatan Tanjung Bintang kabupaten Lampung Selatan adalah memipil jagung. Proses pemipilan yang biasa dilakukan petani selama ini dilakukan dengan cara tradisional atau semi mekanis, sehinga membutuhkan waktu yang cukup lama dan kurang efisien. Selain cara tersebut petani membawa hasil jagungnya ke pabrik pemipil dengan biaya yang cukup besar, sehingga nilai jual jagung menjadi menurun. Hal ini dikarenakan mahalnya harga alat pemipil jagung yang tersedia dipasaran dan juga petani belum mengetahui teknologi untuk pembuatan mesin pemipil jagung. Berdasarkan permasalahan tersebut, maka diperlukan pembuatan mesin pemipil jagung yang portable yang bertujuan untuk meningkatkan produktivitas petani dalam hal pemipilan jagung. Pada implementasi ini dilakukan pengembangan desain serta pembuatan alat pemipil jagung berskala industri rumah tangga dengan menggunakan mata pisau jenis rotary spiral. Jenis mata pisau ini memiliki ke unggulan yakni lebih efektif untuk memipil jagung jenis grigi (konvensional). Dari hasil pengabdian yang telah dilaksanakan, terciptanya mesin pemipil jagung skala industri rumah tangga dapat membantu pekerjaan petani dalam hal pengolahan jagung kering mapaun jagung basah sehingga dapat meningkatkan hasil produksi jagung dalam bentuk jagung yang sudah dipipil.
Integrated of Aerodinamics Tip and Hub of Wind Turbine on Composite Materials Akhmad Riszal; Agus Sugir; Martinus; Ahmad Yonanda
Journal of Applied Science, Engineering and Technology Vol. 5 No. 2 (2025): December 2025
Publisher : INSTEP Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/jaset.v5i2.90

Abstract

Global energy consumption is increasing, this is because human needs are dependent on electricity. However, many power plants still depend on fossil fuels, so the impact on the environment is getting bigger as energy consumption increases. It is necessary to develop renewable energy sources, to reduce the use of fossil fuels. One of them is using renewable energy from wind sources. The purpose of this research is to conduct simulations to analyze the aerodynamics and pressure distribution in the tip and hub areas of a wind turbine using QBlade, then conduct experiments in making composite specimens that will later be applied to wind turbines according to the design. This research shows that the highest pressure occurs at the tip and hub of the blade, so it is necessary to improve strong and lightweight materials by using bamboo fiber composites.
Studi Numerik Aerodinamika Turbin Angin Kontra Rotasi Berdasarkan Variasi Jarak Terhadap Rasio Putaran Rotor Akhmad Riszal; Agus Sugiri
JURNAL MECHANICAL Vol 17 No 1 (2026): JURNAL MECHANICAL
Publisher : Fakultas Teknik, Universitas Lampung

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Abstract

Counter Rotating Wind Turbine (CRWT) is one of the developments of horizontal axis wind turbines that utilize two rotors rotating in opposite directions to increase the efficiency of wind energy conversion. This study aims to analyze the aerodynamic characteristics of CRWT using the Computational Fluid Dynamics (CFD) method by studying the effect of variations in the distance between the rotors on turbine performance. The blade model used consists of three blades using the S826 airfoil from the National Renewable Energy Laboratory (NREL). Simulations were carried out using the Moving Reference Frame (MRF) method with the Realizable k-ε turbulence model. The variations analyzed include the distance between the rotors Z/D₁ of 0.25 and 1 at a rotor rotation ratio of 0.6 with a Tip Speed ​​Ratio (TSR) of 6. The simulation results show that the CRWT configuration produces a higher power coefficient than a single rotor turbine. The maximum power coefficient value obtained reaches around 0.52 or an increase of 14.61% compared to the Single Rotor Wind Turbine (SRWT). The flow velocity distribution shows that the distance between the rotors affects the wake interaction and energy distribution on the rear rotor. The configuration with a distance of Z/D₁ = 0.25 produces a more uniform flow distribution, thus improving aerodynamic performance, while the distance of Z/D₁ = 1 shows a greater wake interaction so that the rear rotor efficiency decreases slightly. The results of this study indicate that optimizing the inter-rotor distance is an important parameter in improving the performance of CRWT under the same operating conditions.
Vehicle Safety System Integrated with GSM Network (Global System for Mobile Communications) on Vehicle Ignition System Akhmad Riszal; Suryadiwansa Harun; Yanuar Burhanuddin; Abdul Hakim Md Yusop; Martinus; Arinal Hamni; Rizal Adi Saputra; Rizal Nazarrudin
Jurnal Inovasi Teknologi Vol 6 No 1 (2025): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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Abstract

This research aims to design and create a sms-based motor vehicle security system with an ATMega 8535 microcontroller. This research utilizes hand phone technology and microcontroller. Making this tool has an economical price to secure motorized vehicles. Important prototypes in making this tool are the ATMega 8535 microcontroller, GSM Modem and HP. In making this tool the first thing to make is to make a microcontroller program for the controller. Making this program uses CV Avr soft ware (Code Vision Avr). After the program is finished, the program is downloaded to the microcontroller. Control is done by the microcontroller when it gets input. The result of this research is to get a vehicle security system that is integrated by the ignition system on a motorcycle. The process of securing a motorized vehicle when it is stolen is, the security system will send sms information that the motorcycle is stolen, the alarm sounds and the ignition system is cut off. To turn off the alarm and start the motorcycle, the owner sends an SMS with the format *ALOF# to the security system and starts the motorcycle normally (Pull the front brake three times then position the key to ON mode).
Co-Authors A.Yudi Eka Risano A.Yudi Eka Risano, A.Yudi Eka Abdul Hakim Md Yusop Agus Sugir Agus Sugiri Ahmad Suudi Ahmad Yonanda Amrizal Amrizal Amrizal anggi saputra Arif, Yanuar Zulardiansyah Arifianto, Ony Arinal Hamni Asnawi Lubis Atmoko, Ignatius Bayu Bayu, Chandra Dedy Prasetyo Destia Wahyu Hidayati, Destia Wahyu Didik Rohmantoro DJAROT WIDAGDO, DJAROT Djuansjah, Joy Rizki Pangestu Eko Putra Eko Yohanes Fatra, Fahmy Ferdouza, Nouval Gigih Forda Nama Hadi Prayitno, Hadi Hakim, Naufal Harmen Harmen, Harmen Hendriyanto, Agus Herry Wardono Huda, Zulmiftah Ibrahim, Fauzi Ignatius Bayu Atmoko Irza Sukmana Irza Sukmana, Irza Javensius Sembiring, Javensius Joy Rizki Pangestu Djuansjah Khairul Ummah Khairul Ummah M. Dyan Susila ES M. Haviz Mahardi Sadono, Mahardi Mareli Telaumbanua Martinus Martinus Martinus Martinus Martinus Martinus, Martinus Meizano Ardi Muhammad Muchammad Rizqi Muhammad Irsyad Nazarudin, Rizal Novri Tanti, Novri Panji Kurniawan Risano, Ahmad Y E Rizal Adi Saputra Rizal Adi Saputra Rizal Nazarrudin Sandy Dwi Hardin Sena Mahendra Sinaga, Jorfri Boyke Sugiyanto - Sugiyanto Sugiyanto Suryadiwansa Harun Tarkono Tarkono Trisya Septiana Wibowo, Pasha R A Wicaksono, M Arif Wicaksono, Mahruri Arif Widyosekti, M. Dhiku Yanuar Burhanuddin Yohanes Sarsetyono Yusup Hendronursito, Yusup