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R.E.M (Rekyasa Energi Manufaktur) Jurnal
Published by Universitas Muhammadiyah Sidoarjo
ISSN : 25275674     EISSN : 25283723     DOI : https://doi.org/10.21070/r.e.m
Core Subject : Engineering,
Engineering
Focus and Scope Aim: to facilitate scholar, researchers, and teachers for publishing the original articles of review articles. Scope: Mechanical Engineering include: Energy Conversion Renewable Energy Manufacturing Materials and Design Engineering Mechatronics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 155 Documents
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Chemical Modification of Petung Bamboo Fiber to Hybrid Composites: Modifikasi Kimia Serat Bambu Petung terhadap Komposit Hibrida Yusron Maulana, Raden Muhammad; Rahma Rei Sakura; Nasrul Ilminnafik; Sumarji; Mahros Darsin
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1768

Abstract

This study evaluates the effect of alkali treatment using NaOH solution on the mechanical properties and microstructure of hybrid composites based on epoxy resin reinforced with petung bamboo fiber and fiberglass. Bamboo fibers were immersed in five NaOH concentration variations (0%, 3%, 6%, 9%, 12%) before composite fabrication using the hand lay-up method. Tensile testing was performed according to ASTM D-638 standard and microstructural characterization using Scanning Electron Microscope (SEM). The results showed that 9% alkali treatment produced the best mechanical performance with a tensile strength of 58.68 MPa, elongation of 4.15%, and elastic modulus of 1413.49 MPa. SEM analysis indicated improved fiber-matrix adhesion due to removal of lignin and hemicellulose. Optimal alkali concentration enhanced composite performance, making it a potential candidate for eco-friendly vehicle interior applications.
Bidirectional Sensor-Based Measurement of PV Output with MPPT Control: An Experimental Pre-Study before PLC Monitoring Integration Prasetyani, Lin; Abdillah Aziz Mumtasir; M. Akbar Faturahman; Bella Berliana
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1783

Abstract

This paper presents a preliminary experimental study on the use of an analog bidirectional current sensorfor photovoltaic (PV) systems operated under Maximum Power Point Tracking (MPPT) control. The ultimate goalof this research is to develop a comprehensive monitoring system for energy harvesting from PV systems using aPLC-based platform. As an initial step, this study investigates the behavior of a bidirectional sensor in detectingcharging and discharging processes in an off-grid PV configuration. The sensor is evaluated through experimentalmeasurements of current and voltage outputs, where the bidirectional characteristic provides an indication of thedirection of energy flow—charging when energy is stored in the battery and discharging when energy is supplied tothe load. Data acquisition and visualization are performed using LabVIEW, which allows real-time monitoring andvalidation of sensor performance at specific time intervals. The experimental results provide insights into theaccuracy and reliability of the analog bidirectional sensor under varying operating conditions. The novelty of thisstudy lies in its focus on sensor behavior analysis as a foundation for future PLC-based monitoring systemdevelopment. By validating sensor performance through this pre-study, the research ensures that reliable data canbe obtained for subsequent integration into a real-time monitoring and control system for PV energy harvestingapplications
Simulation of Waste Load Variations on Stress Analysis Results of Incinerator Wheel Asroni; Bambang Surono; Hendri Yonatan
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1784

Abstract

An incinerator is a high-temperature waste-burning device with a closed, insulated combustion chamber, designed to minimize environmental impact [1]. Modern incinerators aim to reduce inorganic waste and smoke emissions, particularly in Metro City, Lampung Province [2]. A key component is the wheel, which reduces friction and enhances mobility [3]. This study focuses on designing the incinerator wheel, determining its geometry and material, and analyzing stress, strain, and deformation through simulation [4]. The design process used Autodesk Inventor Professional, while simulations were performed in SolidWorks [5]. Tests were conducted under three load conditions: no load, 250 kg, and 500 kg. The final wheel design measures 150 mm in diameter, 50 mm in width, and 10 mm in thickness, using cast iron. Simulation results show stress, strain, and deformation remain below material limits, even at 500 kg load, confirming the wheel’s safety and reliability for optimal incinerator performance.
Design and Build Prototype of Field Soil Shear Test Equipment: Perancangan dan Pembuatan Prototipe Alat Uji Geser Tanah Komarudin, Udin; Yanyan Agustian
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1749

Abstract

Shear strength analysis testing is a fundamental test in the field of civil engineering. The shear strength of the soil is greatly influenced by the parameters present in the soil, the higher the value of the obtained parameters, the higher the soil strength. To obtain these parameters, we need to conduct one of the soil shear strength tests. The soil shear test that has been conducted in the laboratory involves taking soil samples from the field, transporting them, and then conducting the tests. During the journey from the field to the laboratory, it is highly likely that the sample will undergo changes due to vibrations, shaking, or temperature. Some innovations that have been implemented weigh a maximum of 10kg, are portable and easy to carry, produce accurate test results, and are tested directly in the field. The design of the tool is made in a prototype before the assembly of the tool. The design of the direct shear test tool is made by referring to the standardized testing principles. After the device is assembled, a test is conducted on a soil sample using the standard procedure of the shear test apparatus.
Optimization of Packaging Design for Bumbu Pecel Putri Srikandi Using the Quality Function Deployment (QFD) Method Tutuko, Putri Kinanti Ayu Hapsari; Nurdiansyah, Rudi
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1782

Abstract

Micro, Small, and Medium Enterprises (MSMEs) play a vital role in the Indonesia economy, contributing over 60% to GDP and employing nearly 97% of the workforce. Competitiveness can be improved through packaging that protects product, strengthens brand identity, and attracts consumers. Putri Srikandi, a traditional peanut sauce (bumbu pecel) producer, still uses simple plastic packaging, limiting its market appeal. This study redesigns the packaging using Quality Function Deployment (QFD) through House of Quality (HoQ) to translate consumer preferences into technical specifications. Data from 112 respondents identify 13 key attributes, with readable font color (A3) and eco-friendly packaging (A5) scoring the highest (4.13), while attractive packaging design (A1) and hygiene (A12) scored the lowest (3.96). Benchmarking shows the product underperforms compared to competitors. HoQ analysis produces 13 technical responses, with top priorities are clear producer information (A6, RW = 7.75; NRW = 9%), and brand/logo visibility (A8, RW = 7.71; NRW = 8%). The final design integrates modern aesthetics, local identity, spiciness-based color coding, and eco-friendly materials to enhance competitiveness and consumer trust.
Efficiency and Electrical Power Consumption of Prototype-2 Gasification Stove Fueled by Used Cooking Oil Purwandito Tulus Asmoro; Dani Usman; Feri Siswoyo Hadisantoso; Dwi Nurcahyo; Gimas Sahrul Sopanji
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1779

Abstract

Abstract. Currently, society and the business still rely on 3 kg and 12 kg LPG gas stoves for cooking. And the supply of LPG in Indonesia is 6.7 million tons, or about 77%; it is still imported from abroad. On the other hand, used cooking oil (Used Cooking Oil/UCO) produced in Indonesia is around 1.2 million kiloliters per year, which proves that Indonesia has a fairly abundant supply of used cooking oil. This used cooking oil, if still used for frying, can be harmful to health, and if disposed of in the environment, will pollute water and soil. Therefore, an innovation arose to create a gasification stove by utilizing waste-used cooking oil that is no longer used as fuel for the stove as a form of appropriate technology that is sourced from renewable energy that is environmentally friendly. This study aims to analyze the efficiency of used cooking oil stoves using the Water Boiling Test (WBT) method, where testing and analysis were carried out using 3 samples of 1 liter of water volume. The test and analysis results showed that the average thermal efficiency was 54.4%, exceeding the minimum requirement of 50%, according to the SNI 8660:2018 standard. The average Fuel Consumption Rate (FCR) value was 0.44 liters/hour, and the average input power (Pin) was 3.58 kW, exceeding the average input power for LPG gas stoves of 2.37 kW. Meanwhile, the electrical power required to operate the stove was 430.1 Watts.
Configuration Analysis of Mainsteam Stop Valve-Governor Valve in a Supercritical Steam Turbine Using Computational Fluid Dynamics to Minimize Throttle Losses Fahmi, Jauhar; S. Silviana; Sulistyo
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1762

Abstract

Quantification of losses and prediction of the technical feasibility of a proposed modified system through computational fluid dynamics (CFD) numerical analysis constitute the focus of this study. The system involves a configuration of four sets of Main Steam Stop Valves and Regulating Valves (4MSVGV), which are known to operate at low valve openings (<30%) compared to two sets of MSVGV (2MSVGV) to serve normal load demand. Using CFD modeling, the 2MSVGV configuration demonstrates the ability to serve all load ranges with a general requirement of GV lifting below 82mm. To quantify throttle losses, the principles of entropy generation and exergy destruction are employed. The modified configuration of 2MSVGV, which has a wider valve opening, consistently exhibits lower exergy destruction than the 4MSVGV configuration. Furthermore, a review of the 4MSVGV configuration reveals that GV will be the dominant contributor to exergy destruction compared to MSV. At a load of 855MW, the exergy destruction in the 4GV reaches 21MW, while it is 14MW for the modified 2GV system. The total average improvement in exergy destruction rate with the modified 2MSVGV system is about 2.05MW.
FDM 3D Printing Process Optimization for PLA-Based Bearing Components Using the Taguchi Method: Optimasi Proses Cetak 3D FDM untuk Komponen Bearing Berbasis PLA Menggunakan Metode Taguchi Lestari, Wahyu Dwi Lestari; Sania Nadillah Permata Dewi
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1769

Abstract

Kualitas hasil cetak 3D memegang peranan krusial dalam menjamin keandalan dan performa komponen mekanik seperti bearing. Penelitian ini bertujuan mengidentifikasi pengaruh tiga parameter utama Fused Deposition Modeling (FDM) infill density, layer height, dan suhu nozzle terhadap dua indikator mutu cetak pada komponen bearing berbahan PLA, yaitu waktu cetak dan berat cetakan. Metode Taguchi dengan orthogonal array L9 (3³) diterapkan untuk merancang sembilan kombinasi eksperimen. Setiap kombinasi diuji menggunakan printer Flashforge Guider II Series dengan filamen PLA, lalu dianalisis menggunakan rasio signal – to – noise (S/N) (kriteria “smaller is better”) dan Analysis of Variance (ANOVA). Hasil penelitian menunjukkan bahwa layer height paling dominan memengaruhi waktu cetak (kontribusi 81 %), diikuti infill density (17 %), sedangkan suhu nozzle tidak signifikan. Untuk berat cetakan, tidak terdapat parameter yang berpengaruh signifikan secara statistik (p-value > 0,05), meski infill density memiliki kontribusi terbesar (28 %). Berdasarkan temuan ini, kombinasi optimal untuk meminimalkan waktu cetak pada komponen bearing adalah infill density 60 %, layer height 0,20 mm, dan suhu nozzle 200 °C. Penelitian selanjutnya direkomendasikan untuk mengeksplorasi faktor tambahan (misalnya print speed, suhu platform) serta melakukan uji kekuatan mekanik pada komponen bearing untuk memastikan kestabilan sifat mekanis.
Development of a Waste Plastic-to-Fuel Conversion System for Sustainable Energy Generation in Urban Nigeria Unegbu, Hyginus; YAWAS, Danjuma
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1775

Abstract

Plastic waste pollution has emerged as a critical environmental and public health concern in Nigeria’s rapidly urbanising regions, where improper disposal and inefficient waste management systems persist. In parallel, the country faces acute energy insecurity, largely driven by erratic diesel supply and rising fossil fuel costs. This study presents the design, optimisation, and techno-environmental evaluation of a decentralised pyrolysis-based conversion system for transforming plastic waste into liquid fuel. Polypropylene (PP), high-density polyethylene (HDPE), low-density polyethylene (LDPE), and polystyrene (PS) were thermally degraded at controlled temperatures between 350°C and 500°C under inert conditions. Experimental trials revealed that oil yield increased with temperature, peaking at 450°C for all polymers. PP demonstrated the highest yield (65.1%) followed by PS (63.0%), HDPE (62.5%), and LDPE (60.4%). Fuel characterisation showed calorific values of up to 42.7 MJ/kg and physicochemical properties within acceptable diesel standards. Emissions analysis using flue gas monitoring confirmed low outputs of CO, NOx, and SO₂, all within Euro VI regulatory limits. Energy efficiency was highest for PP-derived fuel at 71.4%. Techno-economic modelling, based on a 10-year operational horizon, produced a net present value of ₦11.8 million, an internal rate of return of 28.4%, and a break-even fuel price of ₦290/litre. Statistical modelling further validated temperature and polymer type as primary determinants of yield performance. The findings demonstrate that decentralised plastic pyrolysis systems can simultaneously address urban waste accumulation, reduce environmental emissions, and provide affordable alternative fuels, making them suitable for integration into Nigeria’s circular economy and energy access strategies.
The Effect of Cover Glass Thickness on the Performance of Box-Type Solar Cookers: Pengaruh Ketebalan Kaca Penutup Terhadap Performa Kompor Surya Tipe Kotak Muhammad Naufal Bari; Damora Rhakasywi; Fahrudin
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1787

Abstract

Kompor surya memiliki potensi dalam pemanfaatan energi Surya di bidang peralatan rumah. Pancaran energi yang tidak bisa dikendalikan oleh manusia menjadikan komponen kompor yang digunakan harus dibuat optimal agar memanfaatkan energi secara maksimal. Penelitian ini membandingkan performa kompor surya ketika menggunakan ketebalan kaca penutup yang berbeda, yaitu 3mm, 5mm, 8mm. Metode yang digunakan adalah uji coba lapangan dengan kondisi stagnan dan beban memasak air 1kg. Hasil dari penelitian ini adalah penggunaan kaca ketebalan 5 mm menghasilkan suhu maksimal tertinggi, yaitu 148,25 oC dibanding ketebalan 3 mm dan 8 mm, yang masing masing mendapatkan angka 124,25 oC dan 109,5 oC pada kondisi tanpa beban, sedangkan uji coba masak menghasilkan suhu maksimal 98 oC pada 3mm, 101,25 oC pada 5mm, dan 79,5 oC pada 8mm

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