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All Journal Jurnal Rekayasa Mesin Multidisciplinary Innovations and Research in Applied Engineering Scientific Contributions Oil and Gas
Prihtiantoro, Dedhy
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Integrating Automatic Arm Lifting Systems to Minimize Wire Broom Damage in Electric Road Sweepers Sakarinto, Wikan; Maula, Mohamad Izzur; Lutanto, Agus; Falah, Fajrul; Prihtiantoro, Dedhy; Djati, Isworo; Sugiyanto, Sugiyanto
Jurnal Rekayasa Mesin Vol. 19 No. 3 (2024): Volume 19, Nomor 3, Desember 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i3.5963

Abstract

Electric road sweepers often face damage to wire broom components due to manual operation errors, particularly when navigating obstacles like speed bumps. To mitigate this, an automatic arm lifting system using proximity sensors was developed to enhance efficiency and extend broom lifespan. This study focused on designing the wiring, determining optimal sensor detection distances, and assessing sensor angle inclinations for an electric road sweeper prototype. Functional testing determined that Sensor A should be placed 60 cm from the wire broom with a tilt angle of 42.2Ëš, a distance of 2936 mm to the ground, and 2800 mm to the object for lifting commands. For Sensor B, the lowering command requires a tilt angle of 49.4Ëš, a distance of 20 cm from the wire broom, 2692 mm to the ground, and 2200 mm to the object. These settings ensure the system effectively lifts the sweeper arm over obstacles, enhancing both efficiency and durability. The findings demonstrate the potential for advanced sensor technology to improve urban cleaning equipment and support sustainable city maintenance practices.
Investigation on the significance of numerical and physical parameters on a plane wall heat transfer Prihtiantoro, Dedhy
Multidisciplinary Innovations and Research in Applied Engineering Vol. 1 No. 1 (2024)
Publisher : Akademi Inovasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70935/fa6c8f97

Abstract

Heat transfer is a process that underlines many engineering applications. Temperature distribution and heat flux of a part as an effect of heat load can be analyzed for technical and economic justification. Computation has been easier with the aid of computational software based on numerical methods. The numerical method is about approximation; therefore, validation is necessary to verify the accuracy. A comparison of numerical and analytical methods on a plane wall thermal analysis had confirmed that the result from ANSYS fluent satisfies the computation. The results were strengthened by the negligible error when comparing the analytical and numerical methods. An extended study was performed to further investigate the significance of numerical and physical parameters on the result. The numerical parameter does not seem to have a significant effect, yet the physical parameters do. The study can be employed to predict the generated heat flux from various parameters under predefined operating conditions.
The Significance of Nanofluids as Working Fluids in Energy Extraction Process on Geothermal Heat Exchanger System Utilizing Abandoned Oil Wells: A Review Prihtiantoro, Dedhy; Maula, Mohamad Izzur; Imaduddin, Fitrian
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1815

Abstract

Geothermal energy offers significant potential as an environmentally friendly renewable resource; however, large-scale deployment remains constrained by high drilling and infrastructure costs. Repurposing abandoned oil and gas wells as geothermal heat exchanger systems has emerged as a promising alternative, yet research on the application of nanofluids in such systems remains limited and fragmented. This review employs a narrative synthesis approach to analyze more than 80 peer-reviewed studies related to wellbore geothermal heat exchangers, working fluids, and nanofluid thermal enhancement mechanisms. The review identifies a clear knowledge gap regarding the integration of nanofluids into geothermal heat extraction processes in deep coaxial and U-tube systems, particularly with respect to long-term stability, pressure drop, and techno-economic feasibility. Findings indicate that nanofluids, especially metal-oxide and hybrid formulations, can substantially enhance thermal conductivity and heat transfer performance, with TiO₂- and CuO-based nanofluids showing the most promising results. However, challenges remain in optimizing concentration, ensuring stability, and mitigating increased pumping power. Overall, this review provides a consolidated understanding of existing research and highlights key directions for future development to improve heat extraction efficiency in geothermal systems utilizing abandoned wells.
Co-Authors Djati, Isworo Falah, Fajrul Imaduddin, Fitrian Lutanto, Agus Mohamad Izzur Maula Sugiyanto - Wikan Sakarinto