cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Roy Lamrun Sianturi
Contact Email
roylamrunsianturi@gmail.com
Phone
+6282286672408
Journal Mail Official
roylamrunsianturi@gmail.com
Editorial Address
Taman Sejahtera Asri complex, Namorambek District, Deli Serdang Regency, North Sumatra 20356, Indonesia
Location
Unknown,
Unknown
INDONESIA
International Journal of Energy Systems and Materials Innovation
Published by Gio Vani Publisher
ISSN : -     EISSN : 31241514     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Industrial & Manufacturing Engineering Mechanical Engineering
The scope of the journal covers topics related to: Acoustical engineering, Aerospace engineering, Automotive engineering, Energy Engineering, Manufacturing engineering, Materials Science and Engineering, Microscopy, Power plant engineering, Thermal engineering, Vehicle engineering
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 6 Documents
 1 
Search results for , issue "Vol. 1 No. 2 (2026): Edition January- April IJESMI" : 6 Documents clear
In-Situ Elucidation of Probabilistic Gas Evolution Pathways in Thermal-Driven Degradation of LiFePO₄ Batteries Mine Zhang; Wencin Teng; Lehuin Jiang; Rein Sun
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.v1i2.12

Abstract

Lithium-ion batteries are increasingly utilized to meet modern energy storage demands for high performance and sustainability. Despite their strong thermal stability, lithium iron phosphate (LiFePO₄) batteries face safety challenges from flammable gas emissions during thermal runaway. This study systematically examines gas evolution pathways through in-situ analysis and structural characterization of the LiFePO₄ cathode, identifying six key reactions driving thermal degradation. Results show that ethylene and carbon dioxide are the main gases produced, primarily from electrolyte decomposition. Diethyl carbonate undergoes evaporation and degradation, while ethylene carbonate reacts with active electrode materials. Although cathode structural changes occur under heat, no direct oxygen release was observed. The main causes of thermal runaway are anode–electrolyte reactions generating heat and gases between 200–300°C. Correlation analysis further indicates that hydrogen formation results from interactions between metallic lithium and trace water in a reductive environment. These findings enhance understanding of degradation chemistry and support the design of next-generation LiFePO₄ batteries with improved thermal safety.
Development of an Industrial-Scale Coffee Drying Technology: Energy Efficiency and Sustainability Assessment Richard A. Williams; Maria V. Sanchez-Delgado; John M. Dennis; Eleanor C. Sharpe; Samuel J. Pettinger
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.v1i2.13

Abstract

This study addresses the critical need for energy-efficient and sustainable technologies in industrial coffee processing by developing and evaluating a novel waste-heat recovery preheater integrated into a coffee roasting system. The research experimentally investigates the impact of preheating on the thermal dynamics, energy efficiency, and product quality of Robusta coffee beans at a laboratory scale. Results demonstrate that utilizing exhaust heat to pre-condition beans significantly enhances process performance, achieving a 62.33% reduction in overall energy consumption and a 60.65% decrease in LPG fuel use. The preheating mechanism accelerated the roasting kinetics, reducing the time to target roast level by 2–3 minutes and improving moisture removal efficiency, yielding a final bean moisture content of 1.6% compared to 3.1% in the conventional process. These findings validate the preheater as a highly effective intervention for optimizing heat and mass transfer. The study concludes that integrating such waste-heat recovery technology presents a viable, scalable pathway for decarbonizing industrial-scale coffee drying and roasting operations, directly contributing to enhanced energy efficiency, reduced carbon footprint, and improved economic viability within the global coffee supply chain.
Hydrothermal Liquefaction of Agricultural Residues for Renewable Bio-Crude Production: Energy Yield and Emission Reduction Potential Thomas Schmidt; Fatemeh Rezaei; Zhang Wei; Ahmad Fikri bin Abdullah; Nguyen Van Hung
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.v1i2.14

Abstract

The escalating global energy demand, coupled with the imperative to reduce greenhouse gas emissions, necessitates the development of sustainable alternatives to fossil fuels. This study investigates the Hydrothermal Liquefaction (HTL) of abundant agricultural residues—sugarcane bagasse, wheat straw, and rice husk—for the production of renewable bio-crude oil. Experiments were conducted in a batch reactor at temperatures ranging from 280–320°C to optimize the yield and quality of bio-crude. The results showed that a reaction temperature of 300°C yielded maximum bio-crude outputs of 38.2 wt%, 42.5 wt%, and 35.1 wt% (dry ash-free basis) for bagasse, wheat straw, and rice husk, respectively, with corresponding energy recoveries of up to 78.5%. The bio-crude exhibited improved fuel properties, with higher heating values between 30–34 MJ/kg. A comprehensive life cycle assessment (LCA) revealed that the integrated HTL system, when accounting for avoided fossil fuel use and prevention of open-field burning, achieves net-negative greenhouse gas emissions, ranging from -32.1 to -47.4 g CO₂-eq per MJ of bio-crude. The findings confirm that HTL of agricultural waste is a technically feasible and environmentally strategic pathway for producing low-carbon liquid biofuels, directly contributing to waste valorization, energy security, and climate change mitigation by phasing out fossil-derived fuels.
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.
Comparative Analysis of the Mechanical Strength of Bamboo Fiber-Reinforced Polyester Composites with Random and Unidirectional Fiber Orientations Hen lie Yu; Jiangfu Wu; Yantiex Gao; Zanfin Lu; Wenzhan Hu
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.v1i2.22

Abstract

This study investigates the tensile properties of polyester-based composites reinforced with bamboo fibers, with particular emphasis on the effect of fiber orientation. Composite materials are formed by combining a matrix and a reinforcing phase to achieve improved mechanical performance. In this research, unsaturated polyester resin was used as the matrix, while bamboo fibers served as natural reinforcement due to their availability, low cost, and favorable mechanical characteristics. The specimens were fabricated using the hand lay-up method with two different fiber orientations: random and longitudinal (unidirectional). Tensile testing was conducted to evaluate the mechanical behavior of the composites, including ultimate tensile strength, yield strength, and strain. The results show that the addition of bamboo fibers enhances the tensile properties of the polyester resin compared to the neat resin, which exhibited brittle behavior and limited elongation. Composites with random fiber orientation demonstrated higher average tensile strength but also showed greater variability, indicating less uniform stress distribution. In contrast, composites with longitudinal fiber orientation exhibited more consistent mechanical properties due to better alignment of fibers with the direction of applied load, resulting in more efficient stress transfer. Overall, the findings highlight the importance of fiber orientation in determining the mechanical performance of natural fiber-reinforced composites. Longitudinal fiber alignment is recommended for applications requiring stable and reliable mechanical behavior, while random orientation may be considered where higher peak strength is desired under certain conditions.

Page 1 of 1 | Total Record : 6

 1 

Filter by Year

2026 2026


Reset
Filter By Issues
All Issue Vol. 1 No. 2 (2026): Edition January- April IJESMI Vol. 1 No. 1 (2025): International Journal of Energy Systems and Materials Innovation