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Artoto Arkundato
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Jurusan Fisika, FMIPA, Universitas Jember Jalan Kalimantan No.37, Krajan Timur, Jember Lor, Kecamatan Sumbersari, Kabupaten Jember, Jawa Timur 68121
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Computational and Experimental Research in Materials and Renewable Energy (CERiMRE)
Published by Universitas Jember
ISSN : -     EISSN : 2747173X     DOI : https://doi.org/10.19184/cerimre.v3i2.23544
Core Subject : Science,
Computer Science & IT Energy Materials Science & Nanotechnology Physics
Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) journal receives scientific articles of experimental and/or computational research that using many tools and methods as computational methods (Micromagnetic simulation, DFT Density Functional Theory, MD molecular dynamics, CFD computational fluid dynamics, MC Monte Carlo, FEM finite element method, transport neutron equation, etc) and standard experimental tools and analysis (FTIR, XRD, EDAX, bending test, etc) to develop potential applications of new materials and renewable energy sources. The materials and renewable energy under investigation may show: Prediction of material properties for new potential applications as electronics materials, photonics materials, magnetic materials, spintronics materials, optoelectronics materials, nuclear materials, thermoelectric materials, etc. Exploration of new design of renewable energy resources as in nuclear power plants, solar cell, fuel cells, biomass, thermoelectric generators, nuclear batteries, wind, wave, geothermal, etc.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol 7 No 2 (2024): November" : 7 Documents clear
Design of Waste Management in Nuclear Medicine Isolation Room of Dr. Sardjito Central General Hospital Efendi, Ahmad Mudzakir; Mondjo, Mondjo; Purwanti, Eli
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.53191

Abstract

The purpose of isolation room is to prevent radioactive contamination from the patient's metabolic processes. Because of that the radiation dose around the room and working area need to be limited. So that the value of the dose limits are not exceeded, the work area could be divided according to Perka Bapeten number 17 of 2012 Article 35. The working area can be divided into two parts: control region and supervision region. According to Perka Bapeten number 4 of 2013 Dose Limit Value (DLV) received in the control region has the potential to exceed 3/10 radiation workers DLV and the dose received in the supervision region has the potential of less than 3/10 radiation workers DLV and exceed people DLV. The isolation room is belong in the control region. The liquid waste from the isolation room is accommodated in the multi tank to delay it before being released to wastewater treatment plant. The isolation room needs ventilation using filters to prevent contamination via air circulation. The position of the preparation and radiopharmaceutical room and the waste storage room which is in the control region must be adjacent to the isolation room.Keywords: Isolation Room, Radioactive, Control Region, Supervision Region, DLV.
Statistical Analysis of Electrical Component Aging in Group 6 of the Inga 2 Hydroelectric Plant Following Abrupt Shutdowns Nzita, André Mampuya; Mizengi, Léon Mwanda; Ndiwulu, Guy Wanlogo; Ngoma, Guyh Dituba; Umba-di-Mbudi, Clément N’zau; Ngimbi, Robert Muanda; Phuati, Edmond Phuku
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.51268

Abstract

The Inga 2 hydroelectric power plant in the Democratic Republic of the Congo plays a crucial role in national electricity production and distribution. On January 5, 2016, Unit 3 abruptly shut down, triggering a cascade of shutdowns in other units and disrupting the network frequency. This study aims to analyze the evolution of the stator and rotor winding resistances, as well as the insulation resistance of turbine-generator Unit 6, from its commissioning in 1982 until 2016. The goal is to assess the impact of sudden shutdowns on the aging of its electrical components. Measurements of stator and rotor winding resistances, as well as rotor insulation resistance, were analyzed using R software for statistical analysis. The results of this study will provide recommendations for improving predictive maintenance of Unit 6 and other units in the Inga 2 power plant. Ultimately, the study seeks to enhance understanding of the effects of abrupt stoppages on the aging process of electrical components, thereby ensuring the long-term reliability of the Inga 2 hydroelectric power plant. Keywords: Inga 2 hydroelectric power plant, turbine-generator group 6, stator and rotor winding resistances, predictive maintenance.
Fuel Properties of Briquettes Made from Acacia Mangium Pods and Plantain (Musa Paradisiaca) Peduncles with Cassava Starch Binder Katamani, Patrick; Antwi, Kwaku; Mitchual, Stephen Jobson
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.52505

Abstract

This study used cassava starch binder to produce and investigate briquettes made from plantain peduncles and Acacia mangium pods. It examined fuel properties and the effects of binder viscosities (8cP, 14cP, 29cP) and quantities (30g, 50g, 70g) on briquettes’ physico-mechanical properties. A. mangium pods exhibited superior fuel characteristics: higher gross calorific value (17.68 ± 0.13 MJ/kg), lower ash content (3.60%), and higher volatile matter content (90.35%) compared to plantain peduncles’ 12.58±0.37MJkg, 31.60% and 63.67% respectively. Plantain peduncle briquettes exhibited higher relaxed density (504.09-565.17 kg/m³), superior compressive strength in the cleft (8.50-19.99 N/mm), and greater impact resistance index (166.66-500%) compared to A. mangium pod briquettes’ (1.82-4.40N/mm) and (125-166.66%) respectively. A. mangium pod briquettes were more prone to expansion, with length increases of 16.35-42.13% and diameter increases of 0.88-2.45%, compared to plantain peduncle briquettes’ length increases of 1.43-30% and diameter increases of 1.06-2.16%. Importantly, statistical analysis underscored the significant (p < 0.05) influence of binder properties on the physico-mechanical properties of the briquettes. The impact of binder properties was distinct for each biomass type, with more intricate relationships observed for A. mangium pod briquettes. Optimizing binder properties enhances briquette quality. Both biomass types have the potential for briquette production.Keywords: Plantain peduncles, Acacia mangium pods, binder viscosity, binder quantity and centipoise (cP)
Design and Implementation of Solar Cells as an Alternative Power Source for Pinisi Ships Suardi, Suardi; Maulana, Mohammad Khafid; Ikhwani, Rodlian Jamal; Pawara, Muhammad Uswah; Mahmuddin, Faisal; Tasrief, Muhdar
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.52111

Abstract

The Pinisi is a traditional Indonesian ship recognized as a maritime cultural masterpiece and remains widely utilized, particularly in liveaboard tourism. The increasing demand for sustainable and innovative energy solutions in the tourism and maritime industries highlights the relevance of adopting solar cells as an alternative energy source for lighting on these ships. Solar cells, primarily made from silicon, efficiently convert solar radiation into electrical energy. This study evaluates the feasibility of using solar cells to power lighting systems on Pinisi ships operating in the Selayar Islands. Solar radiation data from NASA Surface Meteorology was utilized to estimate the optimal power output of solar modules. The analysis indicates that 10 solar cell modules can generate an energy output of 19.480 kWh, sufficient to meet the ship's lighting requirements. Configurations were optimized for different decks, ensuring efficient energy distribution while maintaining sustainability. The findings demonstrate that implementing solar cells on Pinisi ships not only fulfills their energy needs but also supports the maritime tourism industry by providing an eco-friendly and innovative energy solution. This approach contributes to the preservation of maritime heritage while addressing contemporary environmental challenges.Keywords: Pinisi ship, solar cells, energy conversion, maritime tourism innovation
Evaluation of Bunsen Reaction Kinetics in Iodine-sulfur Thermochemical Process for Hydrogen Production Vakil, Nafees Ahmed; Rao, Shriniwas A
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.53218

Abstract

There are many thermochemical processes; one of the potential processes is iodine-sulfur (IS) thermochemical process which involves three reaction steps. Bunsen reaction is the first reaction. Kinetic rate data of Bunsen reaction is essential for design and scale up of I-S process. Experiments have been carried out in stirred glass reactor to determine kinetic rate data for Bunsen reaction. The aim of the work is to evaluate intrinsic kinetic rate constant of Bunsen reaction. Mass transfer coefficient is evaluated experimentally for water-sulfur dioxide system. Stirring speed is varied up to 360rpm to obtain a regime in which mass transfer is independent of absorption rate. Mass transfer coefficients are evaluated in the range of 8.7×10-6 m/s to 1.5×10-5 m/s at different stirring speeds. Mass transfer coefficients obtained experimentally. These coefficients are compared with published literature and found to be in good agreement. Bunsen reaction has been carried out in a stirred glass reactor and obtained reaction kinetic rate constant as 1.8 Second-1. Hatta number and Infinite enhancement factors are calculated from the experimentally obtained kinetic rate constant and mass transfer coefficient and found to be 3.6 and 18 respectively. From the calculated values of Hatta number and Infinite enhancement factors, the regime of chemical reaction is found to be in the fast pseudo first order reaction regime.Keywords: Hydrogen production, iodine-sulfur process, Bunsen reaction, stirred glass reactor, reaction kinetics
Applications of Green Inhibitors of Sugarcane Bagasse and Garcinia Kola Fruit Pod for Mild Steel Natural Gas Pipeline Corrosion Inhibition in Acidic Medium Jemine, Teddy E.; Igbafe, Sylvia; Adeniyi, Adekunle Timisiriyu; IGBAFE, Anselm Iuebego
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.50834

Abstract

This study examined the effectiveness of sugarcane bagasse (SCB) and garcinia kola fruit pod (GKFP) extracts as green corrosion inhibitors on mild steel. Extracts of SCB and GKFP were obtained using ethanol in a solvent extraction and characterized physiochemically and phytochemically. Using central composite design (CCD) approach in design expert version 12, process variables of extract concentrations of 0.025 - 0.075 g per liter, exposure durations of 4 - 6 days and temperatures of 50 - 80 °C were varied for the evaluation of the gravimetric corrosion tests. Phytochemical analyses revealed the presence of alkaloids, flavonoids, glycosides, saponin, steroids, phenols, terpenoids, tannin and anthraquinones. FTIR analyses of the SCB and GKFP extracts indicated functional groups of phenols, hydroxyl, alcohols, carbonyl, esters, alkyl halides, aldehydes and alkenes. The best of the observed CCD findings on inhibition efficiencies were 92.11 and 90.20 % on SCB and GKFP extracts respectively with process conditions of inhibitor concentrations of 0.025 and 0.075 g/L of SCB and GKFP extracts respectively for temperature of 50 °C and exposure time 5 days. However, on overall analyses based on varying inhibitor concentrations, temperature range and duration of exposure, the optimal inhibition performance was 62.04 % with SCB and 64.35 % with GKFP. The most effective inhibitor is GKFP which yielded a higher inhibition efficiency under same operating conditions. bioactive compound acts as antioxidants in providing a reducing environment of the acidic reaction by which hydrogen ion in donated in the cause of the reaction. The investigation between the absence and presence of phytochemicals coupled with the components in both extracts from FTIR analyses revealed the significant participation of the bioactive agents of on the mild steel corrosion inhibition in acidic medium.Keywords: Sugarcane bagasse, Garcinia kola fruit pod, corrosion inhibitors, acidic medium mild steel
Design and COMSOL Simulation of Different Shaped Piezoelectric Vibration Energy Harvesters: A Study on MEMS Vibrational Energy Harvesters Khan, Aimal; Nawaz, Muhammad Qasim; Lu, Xu
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.51895

Abstract

Vibrational energy harvesters, also referred to as MEMS (Micro-Electro-Mechanical Systems) piezoelectric energy harvesters, have garnered significant attention for their potential to power wireless sensor networks and low-power electronics without external power sources. Piezoelectric materials, due to their high energy conversion efficiency and seamless integration into microsystems, are widely utilized in such designs. In this study, we simulate MEMS piezoelectric energy harvesters using PZT (lead zirconate titanate) material, each constructed with a silicon core layer and PZT piezoelectric layers. The simulations, conducted using COMSOL Multiphysics, analyze the performance of cantilever-shaped harvesters under identical boundary conditions, including solid mechanics, electrostatics, and an electric circuit with a 10 kΩ resistive load. The results show that natural frequencies range from 100 Hz to 500 Hz depending on the cantilever shape, with the generated voltage varying between 1.2 V and 3.5 V and corresponding power outputs ranging from 0.2 μW to 1.5 μW. These variations highlight the influence of cantilever geometry on energy harvesting efficiency. The study also identifies specific advantages, such as higher power density and tunable frequency ranges, making these harvesters suitable for powering remote sensing devices and microscale electronics. By quantifying performance metrics and demonstrating shape-dependent benefits, this research provides valuable insights into the design and optimization of MEMS piezoelectric harvesters for diverse applications.Keywords: Piezoelectric vibration energy harvesters, COMSOL simulation, MEMS vibrational energy harvesters, bimorph design.

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