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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 18 Documents
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Search results for , issue "Vol 15, No 2 (2026): March 2026" : 18 Documents clear
Environmental impact on electric vehicle: A cradle-to-cradle approach for various vehicle technologies toward sustainable transportation Idris, Muhammad; Garniwa, Iwa; Soesilo, Tri Edhi Budhi; Utomo, Suyud Warno
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61174

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 throughout their entire life cycle. Numerous studies have applied cradle-to-gate, cradle-to-wheel, and cradle-to-grave approaches. However, increasing material waste from vehicles and batteries is expected to become a significant environmental challenge due to intensive mining and resource extraction activities. To address this issue, the cradle-to-cradle approach is proposed to mitigate environmental impacts during the end-of-life phase through material recycling and recovery. This study examines manufacturing, operational, and end-of-life phases across various vehicle technologies. Unlike traditional cradle-to-grave assessments, the cradle-to-cradle approach promotes resource circularity by integrating material reuse and recycling into the evaluation process, thereby minimizing waste and optimizing resource efficiency. The analysis identifies critical indicators, including energy consumption, air quality, and greenhouse gas (GHG) emissions. Although electric vehicles (EVs) significantly reduce operational emissions, they present challenges related to battery material extraction and end-of-life management. By incorporating cradle-to-cradle principles, this study highlights strategies to enhance material recovery and reusability, particularly for battery components and lightweight materials. Furthermore, this research underscores the importance of adopting renewable energy sources and circular economy principles in the transportation sector to achieve sustainability goals. Policy recommendations include strengthening 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.
Experimental and DFT investigation of LiFePO₄/graphene composites prepared via shear exfoliation route Amri, Amun; Mawaddah, Mawaddah; Alfatlian, Alfatlian; Sunarno, Sunarno; Murdiya, Fri; Assylzhan, Mazhibayev; Jumbri, Khairulazhar; Altarawneh, Mohammednoor; Yang, Chun-Chen; Saputro, Sulistyo; Rahman, M Mahbubur
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61976

Abstract

The performance of LiFePO₄ (LFP) cathodes was successfully enhanced by incorporating two types of graphene obtained through green and low-cost liquid shear exfoliation processes. Commercial LFP was combined with few-layer graphene (FLG) and very few-layer graphene (VFLG), with compositions ranging from 0-4 wt.%. LFP, LFP/FLG, and LFP/VFLG, were characterized using electrochemical impedance spectroscopy (EIS), charge–discharge (CD), XRD, FTIR, and FESEM–EDX. Density functional theory (DFT) calculations were further employed to probe the electronic structure of LFP and an idealized LFP(001)/pristine-graphene interface as a baseline model for interfacial electronic coupling. DFT indicated interfacial charge redistribution and the emergence of C-2p π-derived states near the Fermi level, resulting in bandgap narrowing relative to pristine LFP and suggesting an additional electronic percolation pathway at the interface. Experimentally, EIS showed that VFLG reduced charge-transfer resistance and increased effective electrochemical conductivity, while FLG addition was associated with improved interfacial charge-transfer behavior inferred from EIS. CD tests at 0.5 C showed that the 4 wt.% FLG and 4 wt.% VFLG electrodes delivered the highest specific capacities of 29.98 mAh/g and 44.66 mAh/g, corresponding to increases of 81.9% and 170.5% compared to bare LFP. XRD and FTIR confirmed that LFP phase integrity was maintained, and FESEM–EDX revealed a uniform particle distribution with well-dispersed graphene networks. Overall, these results demonstrated that shear-exfoliated graphene effectively improved electronic connectivity and charge-transfer behavior in LFP cathodes, supported by consistent electrochemical measurements and electronic-structure insights from DFT.
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 Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61668

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 reduce 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.
Performance analysis of flow channel collector for photovoltaic thermal system Umam, Mukhamad Faeshol; Hasanuzzaman, Md.; Selvaraj, Jeyraj
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61856

Abstract

Solar energy has seen the most significant development in the past decade. Electricity and hot water production are the two most common uses of solar energy. A photovoltaic (PV) system is a popular method for generating electricity from solar energy. However, PV systems are known for their low efficiency, which reduces further as the PV cell temperature rises. The photovoltaic-thermal (PVT) system combines a PV system with a thermal collector to provide dual benefits, namely power generation and hot water production. However, PVT system research often employs a constant flow (CF) strategy in which water is continually cycled throughout the experiment, making it inapplicable. In comparison, the constant collection temperature (CCT) scheme is a more feasible approach, but its impact on PVT system performance has received less attention. This study compares a flow channel PVT system using both CF and CCT strategies. The results show that the CF scheme achieved a higher maximum thermal efficiency of 35.05%, while the CCT scheme reached 17.89%. The CCT method can also maintain the optimum water temperature despite changing radiation circumstances. The PVT system outperforms traditional PV panels regarding electricity efficiency, with a maximum improvement of 0.89% and 0.96% utilizing the CF and CCT schemes, respectively. These results show that PVT systems with CCT schemes that use less energy for pumping outperform PV panels in terms of power production and electricity efficiency.
Seawater utilization through hybrid photocatalysis-electrocoagulation process using pumice-supported g-C3N4/BiOBr for hydrogen production and methylene blue decolorization Sudianto, Julius Rainer; Pratiwi, Reno; Susanto, Bambang Heru; Slamet, Slamet
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61722

Abstract

This study investigated the simultaneous photocatalysis-electrocoagulation process using pumice-supported g-C3N4/BiOBr nanocomposites in seawater treatment to remove organic pollutants and generate hydrogen gas. The photocatalyst nanocomposite was synthesized via coprecipitation and immobilized on the pumice surface to enhance light exposure and facilitate catalyst recovery. The performance of the hybrid system was evaluated under various operational parameters, including applied voltage, seawater concentration, and pH. The results showed that the combined process outperformed the individual photocatalysis and electrocoagulation systems. Optimal performance was achieved at pH 3 and 15% seawater concentration, resulting in 99.37% methylene blue decolorization and 211 mL of hydrogen within 2 hours. At higher salinities and lower pH, increased coagulant formation caused a shadowing effect, limiting photocatalytic efficiency despite continued hydrogen evolution. The XPS (X-Ray Photoelectron Spectroscopy) characterization of the photocatalyst material, demonstrated the successful formation of a nanocomposite with a stable surface chemistry. Photoluminescence analysis confirmed that the charge separation mechanism could be enhanced, suppressing the recombination rate and being the primary reason for the enhanced photocatalysis process, although interfacial electronic interactions remained limited. Overall, this study demonstrates that the pumice-supported g-C₃N₄/BiOBr photocatalyst integrated with electrocoagulation provides an effective and stable platform for seawater-based hydrogen production and organic pollutant removal.
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 Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61191

Abstract

Access to reliable electricity remains a significant challenge in various developing countries, specifically in Pakistan, where traditional grid expansion is often economically unfeasible, especially in remote and rural areas, which results in frequent outages and limited access to modern energy services. To address this issue, 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) to ensure a continuous supply during low Solar Irradiance ( ), adverse weather conditions, and at night. The proposed off-grid system includes three types of storage technologies: Lithium-Ion Battery (LIB), Sodium-Ion Battery (NIB), and Hydrogen Storage System (HSS). The study employs HOMER Pro to simulate and optimize the system sized as 150 kW. The comprehensive techno-economic analysis is undertaken, and offers two key perspectives, i) System #2 exhibits better technical performance, offering a higher RE fraction and capacity utilization, and ii) System #1 has better economic performance by providing lower Net Present Cost (NPC) and Levelized Cost of Energy (LCOE), Specifically, with the integration of NIBs. These results reveal that the 1.53 $M of NPC, 0.0649 $/kWh of LCOE are the lowest, at RE fraction of 100%, and 0.0977% capacity shortage with 0.0494% of unmet load respectively. A sensitivity analysis is also undertaken to establish the robustness of the proposed off-grid system and the impact of uncertain techno-economic parameters on NPC and LCOE with a variation of ±2%, which enhances the reliability in meeting energy demands. The primary objective of this research is to investigate the potential of NIBs as a future-forward energy storage option, being cost-effective, and derived from abundant, low-cost materials, i.e., Sodium (Na).
Multi objective building energy efficiency optimization scheduling by integrating multi objective grey wolf optimizer and long short term memory network Deng, Shuibo; Lv, Lei
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61709

Abstract

Building energy consumption accounts for a large proportion of the overall energy use in society, and energy-saving optimization scheduling is currently a research hotspot. However, traditional scheduling methods often struggle to achieve an effective balance between multiple objectives such as energy conservation, economy, and indoor comfort. To construct an energy-saving scheduling model that can consider multiple objectives, this paper puts forward a building energy scheduling model based on a Multi-Objective Grey Wolf Optimizer, taking total energy consumption, operating cost, and indoor comfort deviation as the optimization objectives. The model introduces a set of multi-energy collaborative constraints involving wind energy, photovoltaic systems, energy storage, and combined cooling, heating, and power systems. To improve algorithm performance, we innovatively integrated particle swarm optimization and simulated annealing to enhance the model's global search and local optimization capabilities, and introduced residual long short-term memory networks to improve load forecasting accuracy. Experimental results show that compared to similar models, the proposed algorithm improves the energy-saving rate by 13.3% in a typical household scenario. Its response time is 12 s, memory usage is 89 MB, and convergence speed is 42.86% faster than the slowest comparable model. The Multi-Objective Grey Wolf Optimizer effectively coordinates the multi-objective needs of building energy systems. It significantly improves energy savings and economic performance while ensuring indoor comfort. This algorithm provides strong support for intelligent building energy scheduling and offers practical value for promoting the carbon neutrality goals in the building sector.
LEAP-based energy demand and emissions modelling for low-carbon transport in Khon Kaen province, Thailand Woraratch, Kullayawan; Klungboonkrong, Pongrid; Tippichai, Atit
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.62064

Abstract

Climate change mitigation in Thailand requires urgent transformation of energy-intensive sectors, notably transport in rapidly urbanizing provinces. Khon Kaen, a central economic hub in northeastern Thailand, faces increasing energy demand and transport-related greenhouse gas (GHG) emissions driven by rising private vehicle ownership and limited public transit integration. This study applies the Low Emissions Analysis Platform (LEAP) to model long-term energy demand and GHG emissions under two scenarios: Business-as-Usual (BAU) and Low-Carbon Scenario (LCS). A bottom-up vehicle stock turnover approach was combined with socioeconomic projections to simulate transport energy consumption from 2024 to 2050. The LCS integrates electric vehicle (EV) promotion, expansion of Light Rail Transit (LRT), Double-Track Rail (DTR) and High-Speed Rail (HSR), and implementation of Transit-Oriented Development (TOD) strategies. Results show that, compared with BAU, the LCS can reduce transport-related GHG emissions by 62.9% by 2050 and final energy demand by 43.5%, reflecting a substantial shift from fossil fuels toward electricity and biofuels. Under the LCS, adoption of EVs is projected to reach 100% of new passenger car sales by 2050, supported by the electrification of rail transport and decreased Vehicle Kilometres Travelled through TOD-based planning. These findings confirm that locally calibrated, integrated transport and land-use measures can significantly support Thailand’s national targets for carbon neutrality by 2050 and net-zero emissions by 2065. The modelling framework may potentially transferable to other mid-sized cities and provides evidence-based guidance for low-carbon urban transport planning.
Comparative study of Reynolds number and Flowrate effects on the thermal–hydraulic performance of corrugated channels with winglets using TiO₂ nanofluids Ameen, Shadan Kareem; Hussein, Adnan Muhammed
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61883

Abstract

This study aims to provide a deeper and more realistic understanding by conducting a systematic comparison between the two approaches (Reynolds number and volumetric flowrate). The analysis emphasizes the impact of internal channel design, using inclined winglets and surface corrugation. An experimental investigation was carried out to prepare and characterize a TiO₂/H2O nanofluid at 1% volume concentration, including accurate measurements of its thermophysical properties and stability validation. A numerical model was also developed using ANSYS Fluent to simulate the hydrothermal behavior of two channel configurations (straight and corrugated), in which the effects of both Reynolds number and flowrate were evaluated across key parameters such as heat transfer coefficient, pressure drop, performance evaluation criterion, and wall temperature distribution. By observing the flow patterns inside the corrugated channel, three distinct flow behaviors were identified: axial flow along the channel, transverse flow induced by winglets, and swirling flow within the corrugated grooves. This combination of flow modes enhanced fluid mixing and significantly improved heat transfer performance. The results show that TiO₂ nanofluid significantly enhances the thermal–hydraulic performance, with the relative friction factor (Γ) increasing from 6.9 to 7.6 and the thermal enhancement ratio (En) reaching 2.8 (PEC ≈ 1.5) when evaluated using Reynolds number, while volumetric flow rate assessment (7–9 L/min) yielded higher Γ (3.9–4.2) and En/PEC (2.5/1.6). The effects of the internal enhancement techniques were found to be more pronounced when using flowrate as the reference indicator. This work represents a valuable scientific contribution by integrating three advanced enhancement strategies (surface corrugation, inclined winglets, and nanofluid), and it highlights the need to reconsider traditional thermal system design methods based solely on Reynolds number.
Enhancing hierarchical factor (HF) and catalytic performance of Bayah’s natural zeolite catalyst for hydrocracking of palm oil to biofuels Istadi, Istadi; Alqurni, Wais; Riyanto, Teguh
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61669

Abstract

This study investigates enhancement of Bayah’s Natural Zeolite (BNZ), an abundant resource from Banten, Indonesia, as a catalyst for hydrocracking palm oil into biofuels. The primary objective was to improve the zeolite's Hierarchical Factor (HF) and overall catalytic performance through a targeted modification process. The modification involved a two-step procedure: a desilication treatment using various concentrations of sodium hydroxide (NaOH) to create mesoporosity, followed by activation with an ammonium acetate (CH₃COONH₄) solution. The structural, textural, and chemical properties of the modified catalysts were systematically characterized using X-ray Diffraction (XRD), X-ray Fluorescence (XRF), and Brunauer-Emmett-Teller/Barrett-Joyner-Halenda (BET-BJH) analysis. The characterization results revealed that the NaOH treatment increased the HF, average pore diameter, pore volume, and specific surface area compared to the untreated BNZ. Catalytic performance was evaluated in a continuous hydrocracking reactor using palm oil as feedstock. Among the modified samples, the BNZ-3 catalyst exhibited the most promising activity, demonstrating an optimal average pore diameter of 3.83 nm and an HF value of 0.069. This catalyst achieved an impressive Organic Liquid Product (OLP) yield of 85.67% and a palm oil conversion rate of 97.22%. The conversion of triglycerides was monitored via Fourier Transform Infrared Spectroscopy (FT-IR) by observing the disappearance of the ester bond absorption peak at 1745 cm⁻¹. Furthermore, Gas Chromatography-Mass Spectrometry (GC-MS) analysis of the distilled biofuel confirmed the presence of desired hydrocarbons fractions, including gasoline, kerosene, and diesel components, alongside minor quantities of alcohols, esters, and acids. The DSC results corroborate the TG and DTG analyses, reinforcing the conclusion that BNZ‑3 experiences more extensive coke deposition and undergoes more intense thermal decomposition than the blank catalyst. These findings underscore the potential of modified natural zeolites as effective, low-cost catalysts for sustainable biofuel production.

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