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This Author published in this journals
All Journal Journal of Mechanical Engineering, Science, and Innovation
Mahmud, Rizal
Unknown Affiliation
Control & Systems Engineering Energy Engineering Mechanical Engineering

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Green Algae to Green Fuel: Optimizing the Composition of Bio-Oil Additive Mixture from the Pyrolysis Process and RON 90 for Enhanced Engine Performance Amrullah, Apip; Irawansyah, Herry; Ghofur, Abdul; Subagyo, Rachmat; Mahmud, Rizal; Farobie, Obie
Journal of Mechanical Engineering, Science, and Innovation Vol 4, No 2 (2024): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2024.v4i2.6487

Abstract

This study explores the optimization of bio-oil additives derived from the pyrolysis of Ulva lactuca algae, blended with RON 90 gasoline to enhance engine performance and reduce emissions. Addressing the urgent need for sustainable energy, the research focuses on a relatively unexplored area—using algae-derived bio-oils in gasoline engines. The study aimed to identify the optimal blend ratio of bio-oil and gasoline to improve engine metrics such as brake specific fuel consumption (BSFC), thermal efficiency, and volumetric efficiency, while minimizing emissions like CO, CO2, and NOx. Experiments were conducted with bio-oil blended at 5%, 10%, and 15% by volume with RON 90 gasoline in a single-cylinder gasoline engine. Results showed that increasing bio-oil concentration led to improved fuel efficiency and thermal efficiency, along with significant reductions in CO and HC emissions. However, NOx emissions presented a complex trend, increasing at lower bio-oil ratios but decreasing significantly at the highest concentration. These findings suggest that algae-derived bio-oil can effectively enhance gasoline engine performance and reduce environmental impact, offering a novel, sustainable alternative fuel option. The study underscores the importance of optimizing blend ratios to maximize benefits and manage emissions, contributing valuable insights to sustainable energy research.
Innovative Structural Evaluation of a Dual-Function Cane for Elderly Mobility: A Finite Element Analysis Approach Using SolidWorks Rafana, Hadad; Amrullah, Apip; Ma'ruf, Ma'ruf; Mahmud, Rizal
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7649

Abstract

The increasing proportion of elderly individuals globally underscores the need for safe and ergonomic mobility aids that support independent living and enhance quality of life. This study presents a structural analysis of a multifunctional walking cane prototype, NeoMossa, which integrates an umbrella mechanism, aimed at addressing both mobility and environmental protection needs for elderly users. The analysis employed the Finite Element Method (FEM) using SolidWorks simulation software to evaluate the mechanical performance of the cane under static loading conditions of 300 N, 500 N, and 700 N. Key parameters assessed included Von Mises stress, strain, displacement, and factor of safety. The results demonstrated that all measured values remained within acceptable limits, with the highest stress recorded at 75.98 MPa and a minimum safety factor of 1.72 under the maximum load. These findings confirm that the cane structure is capable of withstanding typical user loads without risk of mechanical failure. The study affirms the feasibility of integrating multifunctional features into assistive devices without compromising structural safety, contributing valuable insight to the design and development of innovative mobility aids for the elderly.
Co-Authors Abdul Ghofur Apip Amrullah Irawansyah, Herry Ma'ruf, Ma'ruf Obie Farobie Rachmat Subagyo Rafana, Hadad