International Journal of Renewable Energy Development
The scope of journal encompasses: Photovoltaic technology, Solar thermal applications, Biomass, 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 and management The journal was first introduced in February 2012 and regularly published online three times a year (February, July, October).
Articles
573 Documents
<![CDATA[Comparative analysis of filterability behavior of B30 and B40 biodiesel blends on various porosity and dimension of fuel filter ]]>
<![CDATA[Yogi Pramudito]]>;
<![CDATA[Nur Allif Fathurrahman]]>;
<![CDATA[Ahmad Syihan Auzani]]>;
<![CDATA[Cahyo Setyo Wibowo]]>;
<![CDATA[Riesta Anggarani]]>;
<![CDATA[Ariana Soemanto]]>;
<![CDATA[Bambang Sugiarto]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.52801
<![CDATA[This report is focused on comparative analysis of the impact of using biodiesel blends containing more than 30% biodiesel in diesel engine filtration systems. The objective of this study is to support the sustainability of the mandatory biodiesel utilization program by more than 30%. To evaluate filterability behavior of high-percentage biodiesel blends, namely B30 and B40 (30 and 40%-vol biodiesel on diesel fuel), the study employed the ASTM D 2068 Filter Blocking Tendency (FBT). After filter rig test, fuel filter pressure was also evaluated using the JIS 1617 standard method. It is important to note that fuel filter plays an important role in removing contaminants from fuel, and, hence, the effect of the difference in filter porosity needs to be observed with pressure difference across fuel filter monitored at the flow rate (0.03 m3/h and fuel temperature (15 ⁰C and 25 ⁰C). Furthermore, the effect of changes in temperature and surface morphology on the characteristics of filter was observed in this study. Based on FBT analysis, a polynomial regression (R2 > 0.98) was used to describe the relationship between FBT value and the effect of biodiesel blends on filterability. It was concluded that the temperature, monoglyceride content, and FAME concentration in the diesel fuel influenced their FBT. However, the rise in waxy particles at 15oC (near Cloud Point) could result in a more significant average pressure drop than at 25⁰C (ambient temperature). It was also found that a higher biodiesel mixture potentially results in a higher-pressure difference due to the lower fuel temperature and the formation of waxy contaminants that can clog filter.]]>
<![CDATA[Energy demand modeling for low carbon cities in Thailand: A case study of Nakhon Ratchasima province ]]>
<![CDATA[Atit Tippichai]]>;
<![CDATA[Kattreeya Teungchai]]>;
<![CDATA[Atsushi Fukuda]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.53211
<![CDATA[Nakhon Ratchasima is one of the northeastern cities which has been promoted as one of the low-carbon cities in Thailand. The study aims to evaluate policies and measures on greenhouse gas (GHG) emissions mitigation to meet the target at the provincial level. The Low Emissions Analysis Platform (LEAP) is used as a modeling tool to simulate energy demand for each economic sector. The 2019 data is set as a base year, using top-down and bottom-up approaches depending on the availability of data for the analysis. The model consists of two scenarios: (1) Business-as-usual (BAU) scenario and Low carbon scenario (LCS). Transport and industry sectors are the most energy-consuming and CO2-emitting sectors in Nakhon Ratchasima Province. In the LCS case, the final energy demand and CO2 emissions in 2050 will be reduced by about 40% compared to the BAU case. In addition, CO2 emissions in Nakhon Ratchasima Province will peak around 2038, this is not the case with BAU. The study could predict future energy demand and propose a way forward to reducing GHG emissions at the provincial level.]]>
<![CDATA[Unveiling frequency-dependent dielectric behavior of cellulose-based polymer electrolyte at various temperature and salt concentration ]]>
<![CDATA[Christin Rina Ratri]]>;
<![CDATA[Qolby Sabrina]]>;
<![CDATA[Titik Lestariningsih]]>;
<![CDATA[Adam Febriyanto Nugraha]]>;
<![CDATA[Sotya Astutiningsih]]>;
<![CDATA[Mochamad Chalid]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.53103
<![CDATA[Dielectric behavior of cellulose-based polymer electrolyte was studied at various temperature and salt concentration. A polymer electrolyte membrane based on cellulose acetate (CA) as the polymer host and LiClO4 as the dopant salt was fabricated using the solution casting technique. The dopant salt concentration was varied as 0.3, 0.5, 0.67, and 1M. Dielectric relaxation spectroscopy characterization were performed using potentiostat at frequency ranging from 0.1 Hz to 1 MHz. Measurements were performed by sandwiching the membrane between stainless steel plates. The ionic conductivity was then calculated based on the Cole–Cole plot obtained from the impedance measurement. It was found that sample 1 M had the highest ionic conductivity at high frequencies. However, the frequency-dependent conductance plot showed that the ionic conductivity of the 1 M sample significantly decreased at low frequencies, i.e. from 3.41×10-5 S/cm at 1 MHz to 1.9×10-8 S/cm at 0.1 Hz. Other samples did not experience this phenomenon, including those with a Celgard© commercial membrane to represent commercial Li-ion batteries. This is caused by excess charge accumulation, leading to a high concentration of immobile charge carriers, which reduces the available free volume surrounding the polymer chain. This resulted in a significant decrease in ionic conductivity at low frequencies. Temperature variation was also performed on the conductivity measurement at 30-70 °C. Temperature variation showed more predictable behavior, where increasing the temperature activated charge carriers and enhanced ionic conductivity, from 1.81×10-5 S/cm at room temperature to 9.04×10-5 at 70°C. Sweeping across the frequency range results in a consistent sequence of ionic conductivities among the samples at various temperatures. This work is beneficial for evaluating a biomass-based polymer electrolyte complex in a Li-ion battery environment. Feasibility studies can be performed at various concentrations and temperatures to determine the optimal level of dopant salt input across a broad frequency range.]]>
<![CDATA[Experimentation on enhancement of solar still performance ]]>
<![CDATA[Sonia Z. Issaq]]>;
<![CDATA[Shamil K. Talal]]>;
<![CDATA[Aasim A. Azooz]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.53239
<![CDATA[This work presents new results from controlled experiments using well-designed and constructed single-inclination solar stills. The aim of these experiments is to explore methods for enhancing still performance by studying the individual effects of three types of methods. Specifically, the experiments investigate the actual effects of still basin water depth, the use of a sensible heat storage medium, and the treatment of the inner glass surface with waxy substances. The main distinction in this work is the use of solar stills that can achieve thermal efficiencies in excess of 40% under favourable weather conditions without any modification. This high efficiency level allows for meaningful analysis of the impact of modifications on still performance. The results indicate that still yield, productivity, and thermal efficiency decrease significantly when the water depth in the basin exceeds 6 cm. additionally, introducing black gravel in excess of a 2% gravel to water mass ratio in the still basin does not produce a significant change in still thermal efficiency. Treatment of the still inner glass surface with two types of waxy materials resulted in large drop in still performance.]]>
<![CDATA[Adsorption method using zeolite to produce fuel grade bioethanol ]]>
<![CDATA[Hargono Hargono]]>;
<![CDATA[Noer Abyor Handayani]]>;
<![CDATA[Sheila Dwifa Andani]]>;
<![CDATA[Ersa Wardani]]>;
<![CDATA[Ulma Aqari Fisama]]>;
<![CDATA[Kevin Setiadi Seng]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.50936
<![CDATA[Bitter cassava (Manihot glaziovii) has the potential to be converted into bioethanol. However, the distillation process can only purify it to 95% bioethanol. Therefore, it is necessary to carry out an adsorption process to obtain 99.8% bioethanol. This study aimed to investigate the effect of bitter cassava starch hydrolysis time and coral rock in the distillation column on glucose and bioethanol concentrations, respectively. Additionally, the study discussed the effect of adsorbent height (60, 80, 100, or 120 cm) in the adsorption column on bioethanol concentration. There are three main stages for obtaining fuel-grade bioethanol: (i) bitter cassava hydrolysis, (ii) bioethanol production, and (iii) bioethanol purification (distillation and adsorption). Zeolite 4A and natural zeolite were used as adsorbents in this study. The results showed that the best fermentation was obtained at 90 hours, resulting in an ethanol concentration of 13.82% (v/v), which could be purified up to 95.64% through distillation. Furthermore, further purification (adsorption) could extend fuel-grade bioethanol (99.62% and 98.42%). Another analysis also indicated that zeolite 4A was more feasible than natural zeolite for producing fuel-grade bioethanol.]]>
<![CDATA[Demand response based microgrid's economic dispatch ]]>
<![CDATA[Muhammad Hammad Saeed]]>;
<![CDATA[MD Sohel Rana]]>;
<![CDATA[MD Kausaraahmed]]>;
<![CDATA[Claude Ziad El-Bayeh]]>;
<![CDATA[Fangzong Wang]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.49165
<![CDATA[The development of energy management tools for next-generation Distributed Energy Resources (DER) based power plants, such as photovoltaic, energy storage units, and wind, helps power systems be more flexible. Microgrids are entities that coordinate DERs in a persistently more decentralized fashion, hence decreasing the operational burden on the main grid and permitting them to give their full benefits. A new power framework has emerged due to the integration of DERs-based microgrids into the conventional power system. With the rapid advancement of microgrid technology, more emphasis has been placed on maintaining the microgrids' long-term economic feasibility while ensuring security and stability. The objective of this research is to provide a multi-objective economic operation technique for microgrids containing air-conditioning clusters (ACC) taking demand response into account. A dynamic price mechanism is proposed, accurately reflecting the system's actual operational status. For economic dispatch, flexible loads and air conditioners are considered demand response resources. Then, a consumer-profit model and an AC operating cost model are developed, with a set of pragmatic constraints of consumer comfort. The generation model is then designed to reduce the generation cost. Finally, a microgrid simulation platform is developed in MATLAB/Simulink, and a case is designed to evaluate the proposed method's performance. The findings show that consumer profit increases by 69.2% while ACC operational costs decrease by 18.2%. Moreover, generation costs are reduced without sacrificing customer satisfaction.]]>
<![CDATA[Development of BiOBr/TiO2 nanotubes electrode for conversion of nitrogen to ammonia in a tandem photoelectrochemical cell under visible light ]]>
<![CDATA[Prita Amelia]]>;
<![CDATA[Jarnuzi Gunlazuardi]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.51314
<![CDATA[Ammonia (NH3) is one of the important chemicals for human life. The demand for ammonia is expected to increase every year. Conventionally, the fixation process of N2 to produce NH3 in the industrial sector is carried out through the Haber−Bosch process, which requires extreme temperature and pressure conditions that consume a high amount of energy and emit a considerable amount of CO2. Therefore, it is necessary to develop alternative technology to produce ammonia using environmentally friendly methods. Many studies have developed the photo-electrochemical conversion of nitrogen to ammonia in the presence of semiconductor materials, but the resulting efficiency is still not as expected. In this research, the development of the tandem system of Dye-Sensitized Solar Cell - Photoelectrochemistry (DSSC - PEC) was carried out for the conversion of nitrogen to ammonia. The DSSC cell was prepared using N719/TiO2 nanotubes as photoanode, Pt/FTO as cathode, and electrolyte I-/I3-. The DSSC efficiency produced in this research was 1.49%. PEC cell at the cathode and anode were prepared using BiOBr/TiO2 nanotubes synthesized by the SILAR (Successive Ionic Layer Adsorption and Reaction) method. The resulting ammonia levels were analyzed using the phenate method. In this study, ammonia levels were obtained at 0.1272 µmol for 6 hours of irradiation with an SCC (Solar to Chemical Conversion) percentage of 0.0021%.]]>
<![CDATA[Investigating the potential of avocado seeds for bioethanol production: A study on boiled water delignification pretreatment ]]>
<![CDATA[Herliati Rahman]]>;
<![CDATA[Ayu Nehemia]]>;
<![CDATA[Hadiatun Puji Astuti]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.52532
<![CDATA[The increasing need for alternative fuels to replace fossil fuels has made bioethanol a promising option. Although numerous sources of sugar generation and agricultural wastes can be converted into ethanol, Avocado Seeds (AS) are particularly attractive as raw materials due to their abundance, high carbohydrate content, and lack of interactions with the food chain. Therefore, this study investigated the potential of AS for bioethanol production using several steps, including boiled water delignification pretreatment, catalytic hydrolysis, and fermentation with Saccharomyces cerevisiae. The delignification pretreatment of AS involved soaking in 4% (w/v) sodium hydroxide liquor for 24 hours. Then the mixture was heated to 80°C and stirred slowly for 2.5 hours and after that washing with boiled water at 100 oC for 1.5 hours and screening the mixture. Subsequently, catalytic hydrolysis and fermentation were carried out using two different concentrations of Saccharomyces cerevisiae as yeast, namely 10% (w/v) and 15% (w/v). Qualitative sample analysis was conducted using scanning electron microscopy (SEM) to observe the effect of delignification pretreatment, while FTIR analysis using Thermo Scientific Nicolet iS50 was used to test for glucose functional groups. Quantitative analysis was performed using gas chromatography 7890b mass spectrophotometry 5977A, Agilent DBVRX to determine hydrolysate fermentation. The results revealed that the highest ethanol yield was achieved through fermentation with 15% (w/v) yeast and 40% (v/v) catalyst, resulting in an ethanol yield of 83.755% of the theoretical maximum.]]>
<![CDATA[Assessment of the technical-economic performance and optimization of a parabolic trough solar power plant under Algerian climatic conditions ]]>
<![CDATA[Khaled Bouchareb]]>;
<![CDATA[Nabila Ihaddadene]]>;
<![CDATA[Khellaf Belkhiri]]>;
<![CDATA[Khaoula Ikhlef]]>;
<![CDATA[Aissa Boudilmi]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.54056
<![CDATA[In this study, the design, analysis and optimization of the performance of a concentrated solar power plant that is based on the parabolic trough technology with a capacity of 100 MW equipped with a thermal energy storage system were conducted, in two representative sites in Algeria (Tamanrasset and M’Sila). The System Advisor Model software is used to evaluate the technical and economic performances of the two proposed power plants, in addition to carrying out the process of optimizing the initial design of the two power plants by finding the optimal values of the solar multiple and full load hours of the thermal energy storage system, with the aim of increasing the annual energy production and reducing the levelized cost of electricity. The results of the performance analysis conducted on the optimized design showed that the optimum values of the solar multiple and full load hours of the thermal energy storage system for the proposed power plant at the Tamanrasset site were found to be 2.4 and 7 h, respectively, with an annual electricity production of 514.6 GWh, and a minimum value of the levelized cost of electricity of 6.3¢/kWh. While the optimum performance of the proposed plant at the M'Sila site can be achieved by selecting a solar multiple of 3 and 7 h for thermal energy storage system, with a high annual energy production of 451.84 GWh and a low value of the levelized cost of electricity of 7.8¢/kWh. The results demonstrate that CSP plants using parabolic trough technology can increase energy security in the country, while reducing environmental concerns associated with the use of fossil materials.]]>
<![CDATA[Synthesis of Al-Y doped-lithium lanthanum zirconate and the effect of cold isostatic pressure to its electrical properties ]]>
<![CDATA[Fitria Rahmawati]]>;
<![CDATA[Septia K Arifah]]>;
<![CDATA[Yuniawan Hidayat]]>
<![CDATA[ International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023 ]]>
Publisher : <![CDATA[Center of Biomass & Renewable Energy, Diponegoro University ]]>
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DOI: 10.14710/ijred.2023.53901
<![CDATA[This research aims to study the Al-Y dopant to Lithium Lanthanum Zirconate (LLZO) to the characteristics and electrical properties of the LLZO as solid electrolyte. The synthesis was conducted through solid state reaction with Al2O3 and Y2O3 as dopant precursors. X-ray diffraction analysis along with Le Bail refinement was done to understand their structure, and phase content inside. The result found that Al and Y doping increased the cubic phase from 49.58% to 84.91%. The Al-Y doped-LLZO (LLZAYO) powder was then treated by a various cold isostatic pressing, CIP of 0, 20, 30, and 40 MPa to understand the effect of cold isostatic pressure to the ionic conductivity and solid electrolyte performance of the material even without heat sintering treatment. The result found that the green pellet of LLZAYO) which was isostatically pressed by 40 MPa at room temperature provides (9.06 ±0.26) x10-6 Scm-1, about 8 times higher than the LLZO without doping, i.e., (1.25 ±0.01) x 10-6 Scm-1. All solid-state battery with the prepare LLZAYO CIP 40 as solid electrolyte shows reversible reaction of Li/Li+ redox accompanied with Al/Al3+ redox. The Al/Al3+ reaction seems to decrease the electronic resistance between LCO-LLZAYO CIP40-Li which causes the full cell performance to decrease. The initial specific charging capacity is 82 mAh/g, and the initial discharge was 83 mAh/g, confirming 101 % of Coulombic efficiency. The discharge capacity drops to 46 mAh/g at second cycle, leading to a decrease in Coulombic efficiency to 56 %.]]>
