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Rahmat Azis Nabawi
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Journal of Engineering Researcher and Lecturer
Published by Researcher and Lecturer Society
ISSN : -     EISSN : 29637511     DOI : 10.58712/jerel
Core Subject : Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Education Engineering Mechanical Engineering
The Journal of Engineering Researcher and Lecturer is dedicated as a forum for researchers and lecturers around the world to report the research results. All papers are peer-reviewed by at least two referees. The scope includes technological and learning innovation in engineering (miscellaneous). Technological innovation must be carried out continuously for a better life. However, its sustainability is inseparable from human resources. Thus, manuscripts on learning innovation are expected to be a reference in decision-making for a policy on engineering education, resulting in superior students in a sustainable manner. Technological innovations are expected to be a learning reference and can be mastered by students for sustainable human resource development.
Arjuna Subject : Ilmu Pengambilan Keputusan (semua kategori) - Ilmu Pengambilan Keputusan (Lain-Lain)
Articles 4 Documents
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Search results for , issue "Vol. 5 No. 1 (2026): Regular Issue" : 4 Documents clear
Experimental study on the use of wood pellet briquettes in rocket stoves for household energy needs Irianto, Rafki; Fernanda, Yolli; Primawati, Primawati; Yuvenda, Dori
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.206

Abstract

This experimental study investigates the effect of air supply configurations on the combustion performance and thermal efficiency of wood pellet briquettes in rocket stoves for household energy use. With increasing global demand for energy and the depletion of fossil fuels, the shift to renewable biomass fuels, such as wood pellets, is essential to reduce carbon emissions and enhance energy efficiency. The study evaluates four airflow configurations: right fan only (F3), lower-left + right fans (F2+F3), two left fans (F1+F2), and all fans (F1+F2+F3). The results show that the F3 configuration achieved the fastest boiling time, highest boiling temperature, and lowest heat-loss temperature, indicating superior thermal performance. In contrast, configurations with higher airflow (F1+F2 and all fans) led to greater heat losses and slower boiling times, suggesting that excessive airflow can negatively affect efficiency. Additionally, the analysis of residual mass revealed that F3 and F2+F3 configurations produced the lowest residuals, indicating more complete combustion. This study provides important insights into optimising airflow configurations to improve the efficiency of biomass stoves. The findings offer practical implications for the design and operation of sustainable cooking technologies, promoting energy efficiency and reducing reliance on fossil fuels in households, particularly in rural areas.
Numerical and experimental performance evaluation of an Eppler 420–based horizontal-axis hydrokinetic turbine for low-velocity river applications Pepito, Ma. Leona Maye B.
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.202

Abstract

Small-scale hydrokinetic turbines offer a viable solution for harnessing renewable energy from low-velocity rivers and canals, particularly in developing countries such as the Philippines, where a large portion of hydropower potential remains untapped. However, limited studies have experimentally validated the performance of airfoil-based propeller hydrokinetic turbines optimized for shallow, low-speed water streams. This study addresses this gap by designing, simulating, fabricating, and experimentally evaluating a horizontal-axis propeller hydrokinetic turbine based on the Eppler 420 airfoil. A combined Computational Fluid Dynamics (CFD) and field-testing approach was employed to optimize blade geometry, tip speed ratio, and diffuser configuration for a turbine with a swept area of 0.18 m² operating at stream velocities of 0.7–1.3 m/s. CFD results indicate that the venturi-type diffuser increased the inlet water velocity by an average of 62%, resulting in a simulated shaft power increase from 56 W for the bare turbine to 70 W for the diffuser-augmented configuration. Field experiments conducted in a local river validated these trends, achieving a maximum measured shaft power of 65 W at 1.3 m/s with a corresponding power coefficient of approximately 0.30. The close agreement between simulated and experimental results confirms the suitability of the Eppler 420 airfoil for low-velocity hydrokinetic applications and demonstrates the effectiveness of diffuser augmentation. The findings provide practical design guidance and experimental validation for efficient small-scale hydrokinetic turbine deployment in shallow inland water streams.
A literature review of ecosystem-based strategies to reduce public building vulnerability to earthquakes: A case study of Tarakan City Prihartanto, Eko; Nugroho, Widyo; Setiawan, Budi
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.203

Abstract

Tarakan City, an archipelagic region in Indonesia, exhibits a high level of vulnerability to earthquake disasters, particularly regarding public infrastructure that has not been fully designed using seismic resilience approaches. Public buildings such as schools, hospitals, and government offices play a vital role in supporting social functions and basic services, making their earthquake resilience highly crucial. This study aims to identify and analyze ecosystem-based strategies that can be employed to reduce the vulnerability of public buildings to earthquakes. Through a systematic literature review method, this research examines various approaches involving technical, social, institutional, and environmental aspects in building infrastructure resilience. The results indicate that the integration of earthquake-resistant building design, community participation, risk-based spatial planning policies, early warning systems, and institutional capacity building forms an effective and sustainable resilience ecosystem. The contextual analysis of Tarakan City suggests the need for synergy between local government, the community, and the technical sector to strengthen the adaptive capacity of public infrastructure, particularly within the context of archipelagic regions facing logistical and resource constraints. This study provides a conceptual framework that can serve as a basis for developing resilient ecosystem-based mitigation policies for earthquake-prone areas.
3D scanner technology in the reverse engineering of complex mechanical components: A literature review Seftian, Afferli; Sari, Delima Yanti; Rifelino, Rifelino; Abadi, Zainal
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.213

Abstract

This study addresses the challenges involved in the reverse engineering of complex mechanical components, where conventional manual measurement methods often produce geometric deviations that negatively affect the reliability of advanced engineering analyses. A descriptive literature review was conducted to evaluate the role of 3D scanning technology in overcoming these limitations. The study compares various data acquisition methods, including laser scanning, structured light scanning, and photogrammetry, while also analysing how the level of geometric accuracy influences finite element simulation results and structural analysis outcomes. The review found that 3D scanning significantly improves geometric fidelity compared with traditional techniques, thereby enhancing the validity of numerical simulations. However, the review also identified that the quality of the final model is highly dependent on the selected scanning technology, surface conditions, and advanced reconstruction processes such as point cloud registration and mesh generation. The findings indicate that although 3D scanning offers superior precision, geometric deviations may still occur and influence structural parameters. This study concludes that the integration of 3D scanning into reverse engineering workflows requires systematic validation to ensure not only visual accuracy but also functional reliability in engineering applications. Furthermore, this review highlights a critical research gap, suggesting that future studies should place greater emphasis on the direct correlation between geometric accuracy and engineering simulation outcomes.

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