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All Journal Turbo : Jurnal Program Studi Teknik Mesin Angkasa: Jurnal Ilmiah Bidang Teknologi Vocatech : Vocational Education and Technology Journal Teknika Sains : Jurnal Ilmu Teknik Jurnal Rekayasa, Teknologi, dan Sains Jurnal Abdi Masyarakat Saburai (JAMS) ARMATUR : Artikel Teknik Mesin dan Manufaktur Electrician : Jurnal Rekayasa dan Teknologi Elektro Jurnal Ilmiah Multidisiplin Indonesia JUSTIMES (Jurnal Rekayasa Teknik Mesin Saburai) Jurnal Polimesin
Apriyanto, Agus
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Management of Agricultural Machinery Ibrahim, Fauzi; Apriyanto, Agus; Murti, Adam Wisnu; Putri, Novia Utami
Jurnal Rekayasa Teknologi dan sains Vol 9, No 1 (2025): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v9i1.19098

Abstract

The integration of intelligent machinery and autonomous vehicles into agricultural operations offers opportunities for enhanced efficiency and reduced environmental impact. Innovations in sensing, actuation, and information and communication technologies (ICT) present significant potential for advancing agricultural practices. However, fully leveraging these advancements requires revisiting traditional agricultural machinery management processes. Conventional planning methodologies, such as job-shop scheduling, must be augmented with modern approaches like route optimization and sequential task scheduling. This review highlights current advancements and future needs in agricultural machinery management, focusing on five key management tasks across strategic, tactical, operational, and evaluative levels. The study identifies the importance of integrating these tasks with advanced tools and models to enable efficient and sustainable agricultural operations. Future directions emphasize adaptive planning, real-time decision-making, and enhanced system integration to address location-specific and environmental challenges.
Comparison Of Feasibility Of Concrete And Asphalt Road With Analityc Hierarchy Process (AHP) Method Apriyanto, Agus
Jurnal Ilmiah Multidisiplin Indonesia (JIM-ID) Vol. 1 No. 02 (2022): Jurnal Ilmiah Multidisiplin Indonesia (JIM-ID),July
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/esaprom.v1i02.1406

Abstract

This study specifically tries to apply the AHP (analytic hierarchy process) method in the interest of formulation and decision making in the field of engineering, especially for evaluating the comparison of road construction feasibility between asphalt and concrete roads. It is hoped that through this study it can be proven that the AHP method, which is widely used in management decision making, is reliable enough to be applied in engineering and engineering, so that it can assist policy makers in the process of making objective decisions, especially in government circles. This study method includes data collection and analysis methods. For data collection, this study uses a questionnaire method that contains questions related to technical and non-technical factors that are used to assess the feasibility of a road. A total of 16 questions in the questionnaire. Questionnaires were distributed randomly to around 30 respondents who were divided into various groups such as the Department of Highways, consultants, university lecturers, contractors and the general public around the Demak – Godong highway. The results of the questionnaire in the form of answers from respondents were then recapitulated and searched for the dominant answer for each question. The dominant answer is then scored based on the Saaty rating scale. These values ​​are then formed matrices with certain patterns. The AHP method was then applied to analyze these matrices. The results of calculations using the AHP method are in the form of eigenvectors where each value in the vector indicates the value of the proposed alternative (in this case asphalt and concrete construction). From the results found in the analysis, recommendations can then be given as follows: 1) Changes in construction from asphalt to concrete as is currently being carried out on the Demak – Godong highway need to be supported considering that in many ways concrete construction is more feasible than asphalt construction. from this study and 2) the data for the AHP method in this study rely on respondents' assessments of the proposed factors, because the assessments will vary greatly from one another (as indicated in the frequency distribution of the data), the increase in the number of respondents with wider sources involving experts needs to be done in order to maintain data consistency.
Pemanfaatan Rechargeable Aluminium Air Battery Pada Panel Surya Jenis Polycrsytalline Sebagai Energi Alternatif Febrihadi, Ahmad Fauzan; Putri, Novia Utami; Pranita, Elka; Dalimunthe, Ernando Rizki; Murti, Adam Wisnu; Apriyanto, Agus; ibrahim, fauzi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 1 (2025): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i1.2689

Abstract

Kebutuhan energi yang terus meningkat mendorong pengembangan sumber energi alternatif yang ramah lingkungan dan berkelanjutan. Salah satu solusi potensial adalah pemanfaatan rechargeable aluminium air battery yang memiliki kepadatan energi tinggi, aman, dan ramah lingkungan dibandingkan baterai konvensional seperti lithium-ion. Penelitian ini bertujuan untuk mengkaji integrasi panel surya polycrystalline dengan rechargeable aluminium air battery sebagai sistem penyimpanan dan penyedia energi alternatif, khususnya untuk aplikasi penerangan LED. Metode penelitian yang digunakan adalah metode eksperimen kuantitatif, dengan melakukan pengujian kinerja panel surya dan baterai aluminium udara secara langsung. Pengujian panel surya dilakukan selama dua hari dengan pengambilan data tegangan setiap jamnya, sementara pengujian baterai aluminium udara dilakukan dengan variasi jumlah sel baterai (5, 10, dan 15 sel) yang digunakan untuk menyalakan beban LED dalam konfigurasi paralel selama 12 jam, mulai pukul 18.00 hingga 06.00. Hasil pengujian baterai aluminium udara menunjukkan bahwa semakin banyak jumlah LED yang digunakan semakin besar konsumsi daya, sehingga menyebabkan penurunan tegangan dan arus yang lebih cepat. Pada konfigurasi 5 sel tegangan akhir tercatat sebesar 4,85 V hingga 4,09 V, pada 10 sel sebesar 7,33 V hingga 8,5 V, dan pada 15 sel sebesar 6,01 V hingga 7,26 V. Perbedaan ini menunjukkan bahwa rechargeable aluminium air battery mampu menyuplai energi sesuai kebutuhan beban, meskipun daya tahan sistem sangat dipengaruhi oleh jumlah sel baterai dan besar beban yang digunakan
Pelatihan Bisnis Digital Dan Teknologi Produksi Bagi Masyarakat Pekon Mataram Kecamatan Gading Rejo Kabupaten Pringsewu Provinsi Lampung Ibrahim, Fauzi; Putri, Novia Utami; Apriyanto, Agus; Murti, Adam Wisnu; Pratiwi, Dian; Wahyu, Wahyu
JURNAL ABDI MASYARAKAT SABURAI Vol 6, No 01 (2025): JURNAL ABDI MASYARAKAT SABURAI
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/jams.v6i01.3946

Abstract

Program Pengabdian kepada Masyarakat (PKM) ini dilatarbelakangi oleh permasalahan rendahnya pemanfaatan teknologi dalam proses produksi dan pemasaran yang dihadapi oleh pelaku usaha mikro di Desa Mataram, Kecamatan Gading Rejo, Kabupaten Pringsewu. Masyarakat desa sebagian besar bergantung pada sektor pertanian dan usaha mikro, namun keterbatasan dalam akses teknologi, literasi keuangan, dan strategi pemasaran digital menyebabkan rendahnya daya saing produk mereka di pasar yang lebih luas. Kegiatan ini dilaksanakan di Balai Desa Mataram pada tanggal 31 Desember 2024 dengan tujuan untuk meningkatkan kapasitas ekonomi masyarakat melalui pelatihan dan pendampingan yang terintegrasi. Pelatihan mencakup tiga aspek utama, yaitu pelatihan teknologi produksi (penggunaan alat pengering dan pengemasan vakum), pelatihan manajemen usaha (literasi keuangan dan penyusunan rencana bisnis), serta pelatihan pemasaran digital (penggunaan media sosial, e-commerce, dan branding produk). Hasil kegiatan menunjukkan adanya peningkatan pemahaman dan keterampilan masyarakat mitra dalam mengadopsi teknologi dan strategi bisnis modern. Evaluasi menggunakan kuesioner menunjukkan peningkatan pemahaman hingga 80 persen setelah pelatihan. Program ini diharapkan mampu membangun ekosistem usaha berbasis digital yang mandiri dan berkelanjutan di desa, mendukung visi Smart Village.
Optimizing MATLAB Applications to Advance Automotive System Development Ibrahim, Fauzi; Hadi, Agung Efriyo; Marjuni, Teuku; Apriyanto, Agus; Putri, Novia Utami; Wahyudi, Retno; Sembiring, Alexander; Murti, Adam Wisnu
Jurnal Rekayasa Teknologi dan sains Vol 9, No 2 (2025): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v9i2.21385

Abstract

The automotive industry continues to evolve with the integration of sophisticated computational tools to optimize design, analysis, and control systems. MATLAB, known for its powerful numerical and simulation capabilities, has emerged as a key tool in achieving efficiency, accuracy, and automation across automotive engineering processes. This study explores the strategic utilization of MATLAB in areas such as engine modeling, vehicle dynamics simulation, embedded system development, and control system design. The research employs a qualitative method supported by case studies from various industrial applications, highlighting how MATLAB toolboxes like Simulink, Stateflow, and Simscape contribute to reducing development time and improving system performance. Results show that optimized MATLAB use not only accelerates prototyping and testing phases but also enhances precision in control strategies, especially for electric and autonomous vehicles. This paper concludes by emphasizing the growing importance of MATLAB proficiency among automotive engineers and its role in driving digital transformation in the industry. 
Analysis of Thermal Efficiency of the Honda GK5 Engine Fueled with Young Coconut Waste Bioethanol Using a Thermodynamic Approach Wahyudi, Retno; Ibrahim, Fauzi; Sembiring, Alexander; Apriyanto, Agus; Murti, Adam Wisnu; Putri, Novia Utami
VOCATECH: Vocational Education and Technology Journal Vol 7, No 1 (2025): August
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v7i1.214

Abstract

The global energy crisis and increasing awareness of the negative environmental impacts of fossil fuels have driven the development of sustainable alternative energy sources. One promising renewable fuel is bioethanol, especially when produced from agricultural waste such as young coconut waste. This study aims to evaluate the effect of using bioethanol derived from young coconut waste on the thermal efficiency of the Honda GK5 engine through thermodynamic analysis based on the Otto cycle model and verification using experimental data. The research method includes laboratory testing of the Honda GK5 engine with variations in fuel mixtures: E0, E10, E20, and E30. The test results show a significant increase in thermal efficiency up to the E20 mixture, with an experimental efficiency of 31.8% and a theoretical efficiency of 32.0%. This improvement is attributed to the high octane number of bioethanol, which supports more complete combustion. However, at the E30 mixture, a decrease in efficiency is observed due to the lower heating value of bioethanol. The Otto cycle model successfully represents the trend of thermal efficiency with an average deviation of 1–1.5% compared to experimental results. Therefore, bioethanol from young coconut waste proves not only to be environmentally friendly but also capable of enhancing engine energy performance optimally without requiring significant modifications.
Analisis Kinerja Komprehensive Sistem Pendingin Primer terhadap Efisiensi Pembangkit Listrik Tenaga Panas Bumi Tipe Flash Steam Apriyanto, Agus; Novia Utami Putri; Retno Wahyudi; Alexander Sembiring; Fauzi Ibrahim; Adam Wisnu Murti
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 19 No. 3 (2025)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v19n3.2855

Abstract

Abstract. Geothermal power plants rely heavily on the efficiency of their cooling systems to optimize overall energy conversion. This study investigates the performance of the primary cooling systems, namely direct contact condensers and mechanically induced flow cooling towers in Unit 3 of PT. Pertamina Geothermal Energy Tbk, Ulubelu Area, Lampung. Performance metrics are assessed using parameters such as range, approach, and effectiveness for the cooling tower, and thermal efficiency calculations for the condenser and steam turbine. Daily operational data were collected and analyzed. The results show that fluctuations in cooling tower effectiveness significantly affect condenser vacuum and turbine efficiency. The average actual cooling tower effectiveness is 70.06%, lower than the design effectiveness of 78%. The condenser shows an average thermal efficiency of 93.80%, with effectiveness variations between 83.23% to 86.44%. The turbine efficiency based on design is 87.51%, while the actual efficiency drops to the range of 81.84% to 82.48%. This decrease indicates a performance degradation of approximately 0.94% per year. This finding underlines the important role of cooling system optimization in improving the performance of geothermal power plants.
Peningkatan Pakan Ternak Berkualitas dengan Metode Pencampuran dan Penghalusan Mesin Disc Mill Portable di Pekon Mataram, Kecamatan Gading Rejo, Kabupaten Pringsewu Oktarina, Devi; Apriyanto, Agus; Ergantara, Rani Ismiarti; Natalina, Natalina; Ibrahim, Fauzi
JURNAL ABDI MASYARAKAT SABURAI Vol 6, No 02 (2025): JURNAL ABDI MASYARAKAT SABURAI
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/jams.v6i02.4406

Abstract

Pekon Mataram di Kabupaten Pringsewu, Provinsi Lampung, merupakan salah satu sentra peternakan ayam ras petelur yang memiliki potensi ekonomi lokal cukup signifikan. Namun, mayoritas peternaknya masih menghadapi permasalahan mendasar, terutama terkait tingginya biaya produksi akibat ketergantungan pada pakan komersial serta keterbatasan dalam manajemen usaha dan pemasaran. Pengabdian ini bertujuan untuk meningkatkan efisiensi produksi dan kemandirian peternak melalui pemanfaatan teknologi tepat guna berupa mesin disc mill portable, pelatihan formulasi pakan mandiri berbasis bahan lokal, serta penguatan kapasitas manajerial dan pemasaran digital. Metode pelaksanaan mencakup kegiatan sosialisasi, pelatihan teknis dan manajerial, pendampingan intensif, dan evaluasi capaian. Hasil kegiatan menunjukkan bahwa 70 persen peternak mitra mampu mengoperasikan mesin secara mandiri, dan 80 persen telah mengimplementasikan formulasi pakan lokal. Selain itu, terjadi peningkatan produktivitas ternak sebesar 10–15 persen, penurunan biaya pakan hingga 30 persen, serta peningkatan kompetensi manajerial dan adopsi pemasaran digital oleh sebagian besar mitra. Program ini tidak hanya berdampak pada aspek teknis, tetapi juga mendorong terbentuknya kelembagaan peternak mandiri yang berorientasi pada keberlanjutan usaha. Dengan demikian, hasil pengabdian ini menunjukkan bahwa integrasi teknologi sederhana, pelatihan praktis, dan pemberdayaan berbasis komunitas dapat menjadi strategi efektif dalam meningkatkan daya saing peternak skala kecil di pedesaan. Model ini berpotensi direplikasi di wilayah lain dengan karakteristik serupa.
Analisis Kelayakan Finansial Sistem Penyediaan Air Minum (SPAM) Regional 1 Provinsi Lampung Mauliana, Yunita; Cambodia, Mirnanda; Ariyanto, Lilik; Apriyanto, Agus; Wisman, Mira
TEKNIKA SAINS Vol 8, No 2 (2023): TEKNIKA SAINS
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/teksis.v8i2.2700

Abstract

Penelitian ini dilakukan untuk mengetahui kelayakan finansial pada Sistem Penyediaan Air Minum (SPAM) Regional 1 Provinsi Lampung. Penelitian mengenai kelayakan finansial perlu dilakukan untuk mengetahui apakah SPAM Regional 1 Provinsi Lampung layak untuk dijalankan dan dikembangkan. Penelitian ini menggunakan metode analisis statistik deskriptif kuantitatif untuk menganalisis cashflow, kelayakan finansial dan sensitivitas dengan alat analisis NPV, IRR, B/C Ratio serta Payback Period. Hasil penelitian mengenai kelayakan finansial yang telah dilakukan terdiri dari NPV, IRR, Net B/C Ratio, dan Payback Period. Nilai NPV di semua ROT menunjukkan nilai positif dengan tingkat diskonto sebesar 6 persen; Nilai Rasio BCR di semua ROT diatas 1; Nilai Rasio IRR di semua ROT kurang dari rate of return, dimana nilai rate of return diasumsikan sebesar suku bunga deposito yaitu 4 persen; Payback Period (PP) di semua ROT bervariasi dan semuanya lebih kecil dari umur ekonomis bangunan yaitu 20 tahun. Dari hasil tersebut dapat disimpulkan bahwa penilaian kelayakan investasi dari segi finansial pada proyek SPAM Regional 1 Bandar Lampung layak untuk dilanjutkan.
Effect of residence time on the torrefaction characteristics of Calliandra wood as solid biofuel Amrul, Amrul; Apriyanto, Agus; Prayitno, Hadi; Azmar, Muhammad Sajid
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6656

Abstract

Increasing energy demand and the environmental impact of fossil fuel use have prompted the search for alternative and more sustainable energy sources. Calliandra wood (Calliandra Calothyrsus) as a renewable solid fuel has relatively high heating value and rapid growth. This study aims to examine the effect of residence time variation in the torrefaction process on the characteristics of Calliandra wood chips This research was conducted experimentally using a tubular-type continuous torrefaction reactor at two temperatures, namely 275 and 300°C, with three residence time variations: 10, 20, and 30 minutes. The main parameters analyzed included calorific value, proximate and ultimate composition, mass yield, and energy yield. The results showed that the longer the residence time, the heating value and carbon content continued to increase, but there was a decrease in mass and energy yield. At 300°C with a residence time of 30 minutes, the highest heating value was obtained at 6,399 kcal/kg, but the mass yield remained at 35%. In contrast, at 275°C with a residence time of 10 minutes, the heating value increased to 4,632 kcal/kg with a mass yield of 83%. Optimal conditions were obtained at 275°C with a residence time of 20 minutes, resulting in a heating value of 5,387 kcal/kg with a mass yield of 70%, which balanced the energy efficiency and the amount of biomass retained. Although the torrefaction process was shown to improve the quality of biomass as a solid fuel and the longer residence time resulted in higher energy, there was a trade-off in the form of reduced biomass mass. Torrefaction also makes the biomass more hydrophobic and resistant to biological damage. The results of this study are expected to be a reference for the development of torrefaction technology to support the utilization of renewable energy in Indonesia.
Co-Authors Alexander Sembiring Amrul Amrul Anwar Anwar Azmar, Muhammad Sajid Dalimunthe, Ernando Rizki Dewi, Ade Sandra Dian Pratiwi Ergantara, Rani Ismiarti Fajar Sasora Fathurrohman, Taufik Febrihadi, Ahmad Fauzan Gaol, Rotua Astrina Lumban Habibi, Lafran Hadi Prayitno, Hadi Hadi, Agung Efriyo Ibrahim, Fauzi Indriyani Indriyani Iskandar, Hanifah Nurjanah Kurniwan, Filipus Ardi Lilik Ariyanto Marjuni, Teuku Mauliana, Yunita Mirnanda Cambodia Murti, Adam Wisnu Natalina Natalina Novia Utami Putri Oktarina, Devi Pranita, Elka Pujiati, Ani Retno Wahyudi Reza Pahlepi Ruslan Dalimunthe Saibani, Saibani Sembiring, Alexander Wahyu Wahyu Wahyudi, Retno Wisman, Mira