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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.
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.
PENDAYAGUNAAN ALIRAN SUNGAI MENGGUNAKAN PLTA-PH SEBAGAI ENERGI TERBARUKAN UNTUK BUDIDAYA IKAN AIR TAWAR DI DUSUN SINAR NEGERI DESA NEGERI SAKTI KECAMATAN GEDONG TATAAN KABUPATEN PESAWARAN Ibrahim, Fauzi; Yonanda, Ahmad; Marsyad, Hardoyo
Jurnal Bakti Masyarakat Manajemen Vol 3, No 1 (2023): Volume 3 Nomor 1 Tahun 2023
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Manajemen Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jbmm.v3i2.12934

Abstract

Dusun Sinar Negeri terdapat lokasi yang dekat dengan sumber mata air yang dimanfaatkan oleh sebagian warga untuk budidaya ikan air tawar. Hingga saat ini mata air tersebut digunakan warga hanya untuk kegiatan sehari – hari dan sumber utama air bagi kolam ikan. Peluang penerapan teknologi di dusun sinar negeri ini sangat diharapkan warga sekitar karena akan menunjang produktifitas warga. Peternak juga mengeluhkan belum adanya penerangan di sekitar kolam budidaya sehingga peternak ikan kesulitan dalam kegiatan maupun mobilitas malam hari. Potensi sumber daya alam dapat dimanfaatkan sebagai energi alternatif sebagai pembangkit listrik skala kecil yang ramah lingkungan.
PEMBUATAN ALAT PEMIPIL JAGUNG KERING PORTABLE UNTUK KELOMPOK TANI SIDE KARYE DUSUN YOGALAKA DESA SUMUR KECAMATAN KETAPANG KABUPATEN LAMPUNG SELATAN Ibrahim, Fauzi; Wardana, Marcelly Widya; Khikmawati, Emy
Jurnal Bakti Masyarakat Manajemen Vol 2, No 1 (2022): Volume 2 Nomor 1 Tahun 2022
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Manajemen Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jbmm.v2i2.7993

Abstract

A corn Sheller Machine is a tool used to shell corn that has been dried to a moisture content of approximately 18% which is ready to be used as animal feed or for resale. In carrying out corn harvesting activities, home-scale corn farmers work on corn shelling using manual or traditional tools such as shelling by hand or simple tools (screwdrivers). Shelling in this way will require a lot of manpower, time, and small production capacity. Mechanical corn shelling is done by using a corn sheller machine. Sheller machines on the market use manual power. Shelling in this way will require a lot of energy and if the operation method is not correct and the moisture content of the shelled corn is not suitable, it will affect the viability of shelled corn kernels. This study aims to develop the design and application of a portable corn sheller tool with the help of a gasoline-fueled motor. In this case, researchers can find out how the tool works and find out the results of the corn sheller according to the level of the existing dry corn dose. The tools and materials used are very easy to obtain and can be given easy maintenance every month. It is hoped that this tool can help farmers work in terms of processing dry corn so that it can be worth the rupiah, keep the environment clean, and can maximize the potential of corn every year the annual harvest takes place.
PENANGANAN ABRASI PANTAI DENGAN PENANAMAN MANGROVE DI PANTAI KETAPANG Alansori, Apip; Luthfi, Muhamamad; Ibrahim, Fauzi; Prasetyo, Adi
Jurnal Bakti Masyarakat Manajemen Vol 4, No 2 (2024): Volume 4 Nomor 2 Tahun 2024
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Manajemen Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jbmm.v2i1.7312

Abstract

Dengan adanya hutan mangrove pada sepanjang garis pantai tersebut diharapkan kestabilan pantai dapat terjaga. Mangrove dapat menjadi penyangga kelestarian ekosistem di pantai, dimana mangrove memungkinkan berlangsungnya kehidupan flora dan fauna di pantai tersebut. Selain itu, mangrove memberikan perlindungan pantai dari erosi/abrasi dan juga sebagai penahan dan perembesan air laut pasang, serta melindungi kawasan di belakangnya dari tiupan angin laut. Dengan peran mangrove di garis pantai yang sangat besar tersebut, maka sangat penting bagi masyarakat untuk ikut melestarikan hutan mangrove di garis pantai. Sebagai bentuk keikutsertaan tersebut, Mahasiswa/i Program Studi Akuntansi dan Teknik Mesin Universitas Malahayati melakukan kegiatan pengabdian masyarakat di pantai ketapang. Dengan harapan penanaman ini dapat terlaksana secara berkelanjutan dan merata sehingga dapat membantu melakukan penanaman mangrove sebagai solusi kearifan lokal untuk menjaga kestabilan garis pantai. 
THE EFFECT OF HOLDING TIME ON THE QUENCHING PROCESS IN COOLING WATER CIRCULATED ON AISI STEEL 1045 Ibrahim, Fauzi; Prasetyo, Adi; Hadi, Agung Efriyo; Ansyori, Anang
Jurnal Rekayasa Teknologi dan sains Vol 6, No 2 (2022): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v6i2.7055

Abstract

 ABSTRACT Quenching is a material cooling system to obtain certain desired properties. Quenching is carried out to maintain the mechanical properties associated with the crystal structure which will be lost on slow cooling. The method used is quenching in circulating cooling water media with specimens that have been prepared in the form of AISI 1045 steel. The results obtained are the hardness of AISI 1045 steel after going through the 850oC quenching process with holding times of 30, 45, and 60 minutes, an increase of 300% from the raw material. The application of AISI 1045 steel that has been quenched shows results or hardness values that are the main raw materials for gears, crankshafts, and light vehicle spare parts.  Keywords: quenching, AISI 1045 steel, circulating cooling.
REVIEW ON TITANIUM-BASED ALLOYS AS BIOMATERIALS FOR IMPLANT APPLICATIONS Prastyo, Adi; Ibrahim, Fauzi; Efriyo Hadi, Agung; Febrina, Rina; Winarno, Rudi; Ermasari, Anissa; Wahyudi, Retno
Jurnal Rekayasa Teknologi dan sains Vol 7, No 1 (2023): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v7i1.8762

Abstract

ABSTRACT Technological updates in the field of advanced materials research now tend to focus on biomedical materials application and utilization of Titanium and its alloys. Various of implant materials have been employed in various disciplines of medical science depending on the requirements of a particular application. Metals, alloys, ceramics, and polymers are the commonly used biomaterials. Titanium and its alloys are commonly used in almost all disciplines of medicine because of their sufficient biocompatibility and meeting of mechanical requirements. The main focus of this study is to review the various structural and microstructural properties of titanium and titanium-based alloys used as orthopedic implants. Orthopedic implants need to possess certain important qualities to ensure their safe and effective use. These properties like the biocompatibility, relevant mechanical properties, high corrosion and wear resistance and osseointegration are summarized in this review. Various attempts to improve upon these properties like different processing routes, surface modifications have also been inculcated in the paper to provide an insight into the extent of research and benefit that has been put into developing a highly superior titanium orthopedic implant. In addition, this paper also discusses in detail the various surface modification techniques to achieve superior biocompatibility, higher wear and corrosion resistance. Overall, an attempt has been made to bring out the current scenario of Ti based materials for biomedical applications. Keywords: titanium, implant, biomaterial.
Optimization of Environmentally Friendly Material Selection for Automotive Mechatronics Components Using LCA Data and Multi‑Criteria Decision Making (MCDM) Ibrahim, Fauzi; Marjuni, Teuku; Febrina, Rina; Oktarina, Devi; Natalina, Natalina; Ergantara, Rani Ismiarti; Sulistyaningrum, Diah Ayu Wulandari
JEECS (Journal of Electrical Engineering and Computer Sciences) Vol. 10 No. 2 (2025): JEECS (Journal of Electrical Engineering and Computer Sciences)
Publisher : Fakultas Teknik Universitas Bhayangkara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54732/jeecs.v10i2.8

Abstract

The automotive industry faces an increasing demand for sustainable material selection as mechatronic components become more widespread in electrified vehicles. However, data-driven material selection approaches that simultaneously integrate environmental, economic, and technical criteria without laboratory experiments remain underdeveloped. This study addresses this gap by developing a computational framework that combines Life Cycle Assessment (LCA) with a Multi-Criteria Decision-Making (MCDM) approach, specifically the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, using Analytical Hierarchy Process (AHP)–based weights. The framework enables a transparent and reproducible evaluation of environmentally friendly materials for automotive mechatronic components. A case study on an actuator housing evaluates seven material alternatives: Al 6061 (die-cast), recycled Al (die-cast), Mg AZ91 (die-cast), PA6-GF30 (injection), PBT-GF30 (injection), PA12 (SLS 3D print), and bio-based PBT-GF30 (injection). The criteria include total global warming potential (GWP), cumulative energy demand (CED), water use, recyclability, cost, mass, stiffness index, thermal conductivity, and supply risk. Results show that recycled aluminum achieves the highest ranking (closeness coefficient = 0.939), followed by Al 6061 (0.727) and Mg AZ91 (0.547). A Monte Carlo analysis with 1,000 iterations confirms that recycled aluminum consistently remains the best option with 100% robustness under varying weighting conditions. The proposed workflow is replication-ready and can be directly integrated with established LCA databases such as GREET, Ecoinvent, or EPD, enabling engineers to perform sustainable and quantitative material decisions using only data and computational analysis.
The influence of friction stir welding tool shape on quality of AZ31 Magnesium welding product Irza Sukmana; Fauzi Ibrahim; Ahmad Yudi Eka Risano
TURBO [Tulisan Riset Berbasis Online] Vol 10 No 2 (2021): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i2.1728

Abstract

Magnesium is one type of material that can be used as a base metal in welding. Magnesium has superior properties, including low density, good ductility, medium strength and excellent corrosion resistance. Because of its properties, the metal is widely used, ranging from household goods to aircraft components. These base metals are categorised as mild when viewed from the specific gravity of magnesium (1.74 g/cm3 and 1.83 g/cm3). Welding is the process of merging two or more base metals which are merged at the contact surface with or without additives or fillers. Welding is divided into two main categories, Liquid and Solid-State Welding. Friction Stir Welding (FSW) is an example of Solid-State Welding (Non-Fusion Welding). FSW is a friction welding process that twists the tool by utilising heat energy and pressing without additives or fillers until the base metal is in a phase change.  The welding process in this study used the cone and spiral shape with a tool rotation at 2000 rpm and a welding speed of 16 mm/min. The tests carried out are tensile and hardness testing. This study found that the tool shape, tool rotation, and welding speed significantly affect the mechanical properties of the welded AZ31 magnesium. The spiral shape will make the welding area wider. Although the cone shape will have a small area, the weld will look perfect with good tensile strength, while the hardness values for the two tool shapes are almost the same, but the cone shape is better.
Mechanical properties investigation of the potential extruded MgAZ31B as a bone implant Fauzi Ibrahim; Anang Ansyori; Adi Prastyo; Lukito Dwi Yuono
TURBO [Tulisan Riset Berbasis Online] Vol 11 No 2 (2022): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i2.2279

Abstract

Mg is a light metal that has superior properties, including low density, good ductility, medium strength, and good corrosion resistance, mg can also be combined to obtain better properties. Interest in the application of MgAZ31B for bone replacement has now become a major topic and continues to be intensified to improve results that are more compatible with bone constituents found in humans. In the human body, there are approximately 206 bones in an adult. Calcium, magnesium, and phosphorus are the main elements in the formation of human bones but there are many other elements in their formation, the real bone matrix is made of protein, collagen, calcium phosphate, calcium carbonate, magnesium salts, and other minerals. When viewed from the element of bone magnesium is an important part of bone formation and certainly not harmful to the main elements of human bones. However, before being used as bone implants, magnesium must pass the mechanical and clinical test stages.