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All Journal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY JTTM: Jurnal Terapan Teknik Mesin International Journal of Energy Systems and Materials Innovation
Roy Lamrun Sianturi
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Hybrid Energy (Thermoelectric Generator-Archimedes Screw Turbine) Study and Experiment as a Green Energy Generator Based on the Internet of Things (IoT) Roy Lamrun Sianturi; Wilson Sabastian Nababan; Siwan E Parangin angin
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 2 (2024): December 2024 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v8i2.13105

Abstract

The heat energy from the hot water source of Mount Sinabung can be used as a source of electrical energy before being channeled as a source of hot water baths. The hot water flow has a fairly high temperature and a flow rate that can be converted into a source of electricity generation using a Micro Hydro Power Plant (PLTMH) and Thermoelectric Generator (TEG). This data collection was simulated using a heat source designed in a reservoir and a cold water flow that is channeled into the PLTMH-TEG system space as a source of temperature delta. This paper aims to study the TEG series TEG1-199-1.4-0.5 and the Archimedes screw Turbine (PLTMH) as a Hybrid Generator (Green Energy). Data analysis was carried out to calculate the system power output, battery charging time, and efficiency of the TEG and PLTMH. Data analysis in this study applies the Internet of Things (IoT). Test data shows that the maximum output parameter of the PLTMH during testing, obtained a maximum voltage of 20.42 Vdc. The maximum current is 759.75 mA and the maximum water discharge is 2.31 m3/s. In the TEG system, the power generated by the TEG is 20.64 watts at a temperature difference of 70.5˚C. It is concluded that the higher the amount of discharge flowing into the Archimedes turbine system and the temperature difference absorbed by the TEG, the greater the power that will be generated and vice versa.
Sustainable Conversion of Municipal Biomass Waste into Bioenergy: Techno-Economic and Environmental Assessment of Fast Pyrolysis Pathways rinaldo malau; Roy Lamrun Sianturi
International Journal of Energy Systems and Materials Innovation Vol. 1 No. 1 (2025): International Journal of Energy Systems and Materials Innovation
Publisher : Gio Vani Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Municipal biomass waste offers a promising feedstock for renewable energy production, yet its techno-economic and environmental potential remains underexplored. This study investigates the feasibility of producing bio-oil through fast pyrolysis using integrated process simulation, techno-economic assessment (TEA), and life cycle assessment (LCA). Simulation results showed that pyrolysis at 500–550 °C yielded up to 60 wt.% bio-oil, outperforming biochar and gas fractions. TEA indicated strong economies of scale, with the minimum fuel selling price (MFSP) decreasing from USD 1.28/L at 50 t/day to USD 0.71/L at 500 t/day, approaching parity with fossil fuels. LCA further demonstrated that optimized pathways with energy integration reduced the global warming potential to 21 g CO₂-eq/MJ, substantially lower than fossil diesel at 94 g CO₂-eq/MJ. These findings confirm that fast pyrolysis of municipal biomass waste is not only technically feasible but also economically competitive and environmentally advantageous, positioning it as a strategic solution for urban waste valorization and sustainable energy transitions.
Optimization of a Non-Invasive Solar Desalination Prototype Using a Hybrid Desalination System (PV-TE) for Off-Grid Clean Water Production in the Region Roy Lamrun Sianturi; Rinaldo Hasudungan Malau; Tiara Melinda
International Journal of Energy Systems and Materials Innovation Vol. 1 No. 2 (2026): Edition January- April IJESMI
Publisher : Gio Vani Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17524/ijesmi.v1i2.15

Abstract

Access to clean water in Indonesia's remote coastal areas requires a self-sufficient and sustainable desalination solution. This study aims to optimize a prototype of a non-invasive solar desalination system by integrating Photovoltaic-Thermoelectric (PV-TE) hybrid technology for off-grid clean water production. A pilot-scale unit was developed from a basic passive solar distillation prototype through the addition of photovoltaic panels and thermoelectric modules that double as waste heat recoverers and active condenser coolers. Test results show significant performance improvements, with conductivity removal efficiency reaching 99.83% with ultra-pure water quality (80 µS/cm). Water productivity increased exponentially by 1148%, from 0.50 L/day.m² in the basic prototype to 6.24 L/day.m² in the hybrid system, with a system energy conversion efficiency reaching 29.05%. These findings confirm that the strategic integration of PV-TE components not only overcomes productivity limitations in passive solar desalination but also offers an autonomous desalination solution with low environmental impact. This research contributes to the development of self-sufficient water infrastructure that can be replicated in coastal communities with abundant solar intensity.
The Combustion Characteristics and Exhaust Gas Emissions of Stationary Diesel Engines Fueled with A Mixture of Diesel Fuel (Cinnamon Oil and Basil Oil) Melinda, Tiara; Roy Lamrun Sianturi; Rinaldo Hasudungan Malau
International Journal of Energy Systems and Materials Innovation Vol. 1 No. 2 (2026): Edition January- April IJESMI
Publisher : Gio Vani Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17524/ijesmi.v1i2.21

Abstract

The depletion of fossil fuels and strict emissions regulations have driven the need for renewable additives that can improve diesel combustion while reducing pollutants. This study experimentally examined the combustion characteristics and exhaust emissions of diesel fuel mixed with cinnamon oil and basil oil as dual additives in a single-cylinder stationary diesel engine. The essential oils were mixed into the diesel fuel at concentrations of 5%, 10%, and 15%, either individually or in combination, and tested at 1500 rpm with load variations of 0-100%. The results showed that the 10% dual additive mixture (DCB10) provided the best performance with a reduction in CO and HC emissions of 40.9% and 32.1%, respectively, compared to pure diesel fuel. However, NOx emissions increased by 8.5% due to high combustion temperatures and oxygen availability. The synergistic effects of the low viscosity of cinnamon oil and the antioxidant properties of basil oil improved atomization and oxidation kinetics, resulting in more complete combustion. Despite the increase in NOx, the environmental benefits remain positive, making the dual essential oil blend a promising bio-additive for cleaner diesel operation.
Digital histogram-based damage assessment of e-glass reinforced concrete cylinders Sahat Maruli Sihombing; Ibnu Hajar; Roy Lamrun Sianturi; Supriadi; Achmad Jusuf Zulfikar
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2299

Abstract

Concrete cylinders are extensively utilized as standardized specimens to evaluate the mechanical behavior of structural concrete; however, their inherently low tensile strength makes them highly vulnerable to crack initiation and brittle fracture under splitting tensile loading. Although external confinement using E-glass fiber reinforced polymer (GFRP) laminates has been widely reported to enhance tensile performance, the quantitative relationship between mechanical improvement and surface crack evolution remains insufficiently established. Accordingly, this study aims to: (1) evaluate the splitting tensile strength (STS) of concrete cylinders confined with varying numbers of E-glass laminate layers; (2) quantify surface damage using a digital histogram-based crack area percentage (PCA) method; and (3) analyze the correlation between tensile strength enhancement and crack propagation characteristics. The experimental program was conducted at the Materials and Structural Testing Laboratory, Universitas Medan Area, using cylindrical specimens wrapped with one to four E-glass layers and tested under ASTM C496 splitting tensile procedures. The results demonstrate a progressive increase in STS from 2.48 MPa (control) to 3.88 MPa (four layers), representing a 56.5% improvement, with ANOVA confirming statistical significance (p = 0.003). Digital histogram analysis revealed an increase in PCA from 3.12% to 8.19%, with a strong positive correlation (r = 0.87) between STS and crack distribution. These findings indicate that enhanced confinement promotes distributed cracking and improved energy dissipation rather than brittle localization, thereby establishing a comprehensive mechanical–digital damage assessment framework for FRP-confined concrete systems.
Co-Authors Achmad Jusuf Zulfikar Ibnu Hajar Melinda, Tiara Rinaldo Hasudungan Malau rinaldo malau Sahat Maruli Sihombing Siwan E Parangin angin Supriadi Tiara Melinda Wilson Sabastian Nababan