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International Journal of Renewable Energy Development
Published by Center of Biomass and Renewable Energy
ISSN : 22524940     EISSN : 27164519     DOI : https://doi.org/10.61435/ijred.xxx.xxx
Core Subject : Science, Engineering,
Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering
The International Journal of Renewable Energy Development - (Int. J. Renew. Energy Dev.; p-ISSN: 2252-4940; e-ISSN:2716-4519) is an open access and peer-reviewed journal co-published by Center of Biomass and Renewable Energy (CBIORE) that aims to promote renewable energy researches and developments, and it provides a link between scientists, engineers, economist, societies and other practitioners. International Journal of Renewable Energy Development is currently being indexed in Scopus database and has a listing and ranking in the SJR (SCImago Journal and Country Rank), ESCI (Clarivate Analytics), CNKI Scholar as well as accredited in SINTA 1 (First grade category journal) by The Directorate General of Higher Education, The Ministry of Education, Culture, Research and Technology, The Republic of Indonesia under a decree No 200/M/KPT/2020. The scope of journal encompasses: Photovoltaic technology, Solar thermal applications, Biomass and Bioenergy, Wind energy technology, Material science and technology, Low energy architecture, Geothermal energy, Wave and tidal energy, Hydro power, Hydrogen production technology, Energy policy, Socio-economic on energy, Energy efficiency, planning and management, Life cycle assessment. The journal also welcomes papers on other related topics provided that such topics are within the context of the broader multi-disciplinary scope of developments of renewable energy.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 8 Documents
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Search results for , issue "Accepted Articles" : 8 Documents clear
Towards the Sustainability of an Oil Refinery: A Synergy between ISO 50001 and ISO 14001 Management Systems Chaves Almanza, Fabio Daniel
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61162

Abstract

The most implemented standards worldwide for Energy Management Systems (EnMS) and Environmental Management Systems (EMS), ISO 50001 and ISO 14001 respectively, maintain a close correspondence due to the Harmonized Structure (HS) recently established by the International Organization for Standardization (ISO). However, achieving greater energy efficiency does not always align adequately with environmental issues, which is most evident in fossil fuel-based industries. Therefore, this work aims to explore a synergy between these standards and use it to evaluate a technological change in an oil refinery, for better energy performance and especially environmental sustainability. The results show that the change in technology increases electric efficiency from 14% to 45% and the rate of atmospheric emissions per unit of energy generated decreases by 15% on average. However, as fuel consumption doubles, the total emission rises by about 100%. This conflict between energy and environmental performance leads to an analysis of sustainable resource management to better understand the relevance of the change in technology as an appropriate solution for the refinery in the gradual transition to clean energy. The findings of this work shed light on how to deal with oil refineries in the global landscape of urgent sustainable development.
Optimization of Biodiesel Production from Candlenut Oil via Simultaneous Reaction Using a Bifunctional CeO2.CaO Catalyst Widayat, Widayat
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61065

Abstract

The biodiesel synthesis process with a high free fatty acid content can be accomplished in a single stage using solid catalysts that function simultaneously as both base and acid catalysts. In this study, CeO₂.CaO was used as a bifunctional catalyst for biodiesel synthesis from candlenut seed oil. Catalyst characterization includes FTIR, BET, SEM-EDX, and TPD analysis. Process optimization was carried out using the central composite design method on Design Expert software. To determine the effect of each process variable on the simultaneous reaction, the effect of methanol-to-oil molar ratio, catalyst loading, and reaction temperature on FAME yield was also analyzed. The optimum operating conditions to achieve high FAME yield were found at methanol-to-oil molar ratio of 10.3:1, 5.39% w/w catalyst loading, and a reaction temperature of 60°C.
Environmental Impact on Electric Vehicle: Cradle-to-Cradle Approach for Various Vehicle Technology Toward Sustainable Transportation Idris, Muhammad; Garniwa, Iwa; Soesilo, Tri Edhi Budhi; Utomo, Suyud Warno
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61174

Abstract

The transition to sustainable transportation is critical to global efforts to mitigate climate change and reduce environmental degradation. Life-cycle assessment (LCA) provides a comprehensive framework for evaluating the environmental impacts of various vehicle technologies across their entire life-cycle. Numerous studies have been conducted using the cradle-to-gate/wheel/grave approach. However, material waste (vehicles and batteries) will become an ecological problem due to mining and extracting sources. Therefore, the cradle-to-cradle approach is considered to mitigate vehicles' end-of-life phase by material recycling and recovery. This study emphasizes various vehicle technology manufacturing, usage, and end-of-life phases. Unlike traditional cradle-to-grave assessments, the cradle-to-cradle approach promotes resource circularity by integrating material reuse and recycling into the evaluation process, thus minimizing waste and optimizing resource efficiency. The analysis identifies critical indicators, including energy consumption, air quality, and greenhouse gas (GHG) emissions. Electric vehicles (EVs), while reducing emissions during operation, pose challenges in material extraction for batteries and end-of-life management. By incorporating cradle-to-cradle principles, this study highlights strategies for improving material recovery and reusability, particularly for battery components and lightweight materials. This research underscores the importance of adopting greener energy sources and circular economy principles in the transportation sector to achieve sustainability goals. Policy recommendations include enhancing recycling infrastructure, incentivizing eco-friendly vehicle design, and fostering cross-sector collaboration. The findings contribute to a deeper understanding of sustainable vehicle technology pathways and provide a framework for reducing environmental impacts while meeting growing transportation demands.
Energy and exergy performance of a solar-driven NH₃–NaSCN absorption refrigeration cycle: case study in the Colombian Caribbean Carval-García, Vanessa; Sabalza-Pérez, Daniela; Caratt-Ortiz, Jean; De Armas-Calderón, Nelly; Rodríguez-Toscano, Andrés; Anguiano-González, Howen
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61668

Abstract

Absorption refrigeration systems are increasingly recognized as sustainable alternatives for cooling applications, particularly when integrated with renewable energy sources such as solar thermal systems. Among the available working pairs, the NH₃–NaSCN solution offers favorable thermodynamic properties and low environmental impact; however, its performance under tropical climatic conditions with solar integration remains insufficiently explored. This study evaluates the thermodynamic and exergetic performance of a single-effect NH₃–NaSCN absorption refrigeration cycle integrated with a flat-plate solar collector, considering the climatic conditions of five cities of the Colombian Caribbean Region. A validated thermodynamic model was applied to assess the influence of generator, condenser, absorber, and evaporator temperatures on the coefficient of performance (COP) and exergetic efficiency. Results show that increasing generator temperature from 75 °C to 120 °C enhances COP by up to 46.15 %, while raising the evaporator temperature from –8 °C to 4 °C improves COP by 16 %. Conversely, increasing condenser and absorber temperatures reduces COP by 20.54 % and 16 %, respectively. Exergy destruction analysis indicates that the generator and absorber account for 55 % and 34 % of total irreversibilities, highlighting them as priority targets for optimization. Analysis of variance identified generator temperature as the most influential parameter on COP (39.37 %), followed by condenser (31.22 %) and evaporator temperatures (15.18 %). Solar integration enabled stable operation with an average COP decrease of only 3 % across the five cities; however, the use of water in the solar collector restricted operation below the optimal efficiency range (95–120 °C). The combined performance index integrating COP and exergetic efficiency showed that the operating range characterized by elevated generator temperature and reduced condenser temperature delivers the best energy–exergy trade-off, providing design guidelines for high-irradiance regions and supporting the adoption of NH₃–NaSCN as a cost-effective, renewable refrigeration solution.
Seawater Utilization Through Hybrid Process Photocatalysis-Electrocoagulation Using Pumice-Supported g-C3N4/BiOBr for Hydrogen Production and Methylene Blue Decolorization Pratiwi, Reno; Sudianto, Julius Rainer; Susanto, Bambang Heru; n, Slamet
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61722

Abstract

Hydrogen production is one of the important efforts in transitioning from fossil energy to renewable energy due to its ability to reduce carbon emissions. This study presents a pumice-supported g-C3N4/BiOBr photocatalyst for hydrogen production and reducing pollutants in seawater. Pumice has cavities that make it float on water, allowing the photocatalyst to be exposed to light and activated. The catalyst in the form of nanocomposites was synthesized using a direct calcination immobilized on pumice stone and characterized using Scanning Electron Microscopy with Energy Dispersive X-ray (SEM-EDX), X-ray Diffraction (XRD), UV-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS), Photoluminescence Spectroscopy (PL-Spectra), Transmission Electron Microscopy (TEM), and X-ray Photoelectron Spectroscopy (XPS). The study indicates the efficacy of the photocatalysis-electrocoagulation combined process for hydrogen production and pollutant degradation in seawater. The combined system achieved an organic pollutant degradation (modelled by methylene blue, MB) of 99.37% and hydrogen production of 211 mL. The enhanced performance was attributed to the ionic interaction between the photocatalytic and electrocoagulation processes, which improved the kinetics of each. However, at low pH, the combination of photocatalysis and electrocoagulation led to increased hydrogen production. At the same time, the degradation of methylene blue (MB) decreased due to a shading effect that diminished the effectiveness of the photocatalytic process in degrading pollutants. The developed pumice-supported g-C3N4/BiOBr photocatalyst effectively absorbs light, and the optimum hybrid process photocatalysis-electrocoagulation parameters offer a promising solution in producing hydrogen and pollutant removal that utilizes seawater as a renewable energy source.
Design and Optimization of an Energy Storage System for Off-Grid Rural Communities Soomro, Zain Ul Abddin; Khatri, Shoaib Ahmed; Mirjat, Nayyar Hussain; Memon, Abdul Hannan; Uqaili, Muhammad Aslam; Kumar, Laveet
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61191

Abstract

Access to reliable electricity remains a critical challenge in many rural areas of developing countries, particularly in Pakistan, where traditional grid expansion is often economically unfeasible. This research aims to design and optimize an off-grid microgrid system powered by Renewable Energy (RE) sources, specifically solar energy, integrated with an efficient Energy Storage System (ESS).  The proposed off-grid system features a generation RE source with an ESS for continuous power supply during periods of low solar irradiance, poor weather conditions, and nighttime, which includes Lithium-Ion Battery (LIB), Sodium-Ion Battery (NIB), and Hydrogen Storage System (HSS). HOMER Pro software is used to simulate and optimize a system sized 150 kW, assessing various energy storage technologies, including LIB, and NIB, with HSS, to determine the most suitable option for rural electrification. Key results demonstrate that the integration of renewable sources with ESSs significantly enhances reliability, providing a consistent energy supply while reducing dependence on fossil fuels. The techno-economic analysis reveals that the most cost-effective configuration includes solar Photovoltaic (PV), NIB, and minimal use of a HSS for backup power, resulting in a Net Present Cost (NPC) of 1.53 $M and the Levelized Cost of Energy (LCOE) of 0.0649 $/kWh. The proposed system shows the capability to maintain power reliability with no unmet load. 
Experimental investigation to evaluate photovoltaic–thermoelectric hybrid systems enhanced by heatsink and radiation reflector Bamroongkhan, Pawatwong; Nararom, Mati
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61734

Abstract

This study aims to design and evaluate the performance of a hybrid photovoltaic–thermoelectric (PV–TEG) power generation system by integrating a heat sink and radiation reflector under various thermal management conditions. The objective of this study was to investigate the combined effect of these two methods on the power output and system efficiency without expanding the PV installation area. The experimental setup encompassed five configurations (A–E) comparing natural convection, thermoelectric modules, addition of reflective panels, and active cooling using either air suction or forced air ventilation. The experimental findings indicate that all PV–TEG configurations yielded higher power output and greater efficiency than the standalone PV systems. Notably, Configuration E, which combined radiation reflection with forced-air cooling, achieved the highest performance, increasing the electrical output by approximately 1.27 watts and reaching a peak efficiency of approximately 28.6%. The integration of the TEG modules contributed an additional maximum of 2.2% to the total energy output by harvesting excess thermal energy. Further analysis revealed significant correlations between solar irradiance, temperature and electrical efficiency. These results highlight the potential of PV–TEG hybrid systems to effectively harness both solar and thermal energy, particularly in high-temperature and high-irradiance environments.
Enhancing Cold Flow Properties of Palm Biodiesel: Quantitative Comparison of Improvement Methods via Fatty Ester Isomerization and Bio-additive Introduction Indarto, Antonius; Surya Pradana, Yano; Kembara Alam, Alif; Makertihartha, I Gusti Bagus Ngurah; Prakoso, Tirto; Soerawidjaja, Tatang Hernas
International Journal of Renewable Energy Development Accepted Articles
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61192

Abstract

Biodiesel is a cleaner and renewable combustion fuel that globally serves as an effective alternative to fossil diesel. The current application of this biofuel is still restricted to specific concentration due to its poor cold flow properties (CFPs). Nevertheless, some enhancement methods lead to deterioration of other properties, especially oxidation stability (OS). Later, isomerization process was offered to improve cold flow properties chemically with minimum impact on oxidation stability. In this study, palm-biodiesel isomerization was carried out atmospherically using SO4/SnO2 catalyst in the stirred batch reactor at temperature of 200oC, catalyst loading of 10 wt%, stirring speed of 900 rpm, and under N2 flow. The performance of catalyst and the effect of isomerization on CFPs and OS were investigated. For comparative study, the effect of bio-additive (turpentine oil and α-terpineol) introduction, at concentrations of 1, 3, 5 vol%, on CFPs and OS was also evaluated. The isomerization results demonstrated a conversion ratio of 29.0% and an isomerization selectivity of 69.7%. This reaction had a slight improving effect on both CFPs (ΔPP = ‒1oC; ΔCP = 0.5oC) and OS (ΔOS = 1.36 h). Furthermore, the best insertion of bio-additives demonstrated a more significant enhancement in CFPs (ΔPP = ‒1oC; ΔCP = ‒1.75oC). Nevertheless, it significantly reduced OS level (ΔOS = ‒11 h).

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