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Jaka Fajar Fatriansyah
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Journal of Materials Exploration and Findings
Published by Universitas Indonesia
ISSN : -     EISSN : 29625475     DOI : https://doi.org/10.7454/jmef
Core Subject :
JMEF publishes publications that report on R&D discoveries and fundamental understanding of phenomena with potential significance, as well as those that explore solutions to current engineering challenges in materials and mechanical engineering or related fields. JMEF includes original research, review and short communication articles. JMEF welcomes original articles on all aspects of materials science/engineering and mechanical engineering, including: 1. Materials synthesis, processing and manufacturing; 2. Advanced Materials; 3. Extraction metallurgy; 4. Physics of Materials; 5. Computational studies on Materials and Mechanical Engineering; 6. Fluid Dynamics and Heat Transfer; 7. Management Integrity and Reliability Engineering; 8. Mechanical systems; and related fields.
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Articles 8 Documents
 1 
Search results for , issue "Vol. 4, No. 2" : 8 Documents clear
Design of a 10-Ton Capacity Solar-Powered Cold Storage at the Cituis Fish Auction Site, Tangerang, Banten, Indonesia Wardi, Wardi; Budiyanto, Muhammad Arif
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

This study presents the design of a 10-ton capacity solar-powered cold storage system for the Cituis Fish Auction Site (TPI) in Tangerang, Indonesia, as a sustainable solution to support the coastal fisheries sector. The system comprises two temperature zones: an anteroom at 5°C and a freezer room at -30°C, both integrated with a hybrid system utilizing solar panels and batteries. The total power consumption of the cooling system reaches 27.51 kW. The simulation results, obtained using HOMER Pro software, indicate that the hybrid PV system can reduce CO2 emissions by up to 16,754 kg per year. From an economic perspective, the system shows high feasibility with a payback period of only 0.41 years, a capital expenditure (CAPEX) of IDR 745.29 million, and a monthly operational cost (OPEX) of IDR 9.7 million. These findings confirm that the system is both technically and economically viable and can be replicated in other coastal regions.
A Study of Wear Measurement and Life Prediction of Insert Chute Liner on Gold Ore Processing Natanael, Ferry Ardika; Maulidya, Nony; Priadi, Dedi
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Chutes are critical materials handling assets to transport solid particles from one process step to another in mineral processing, coal mining and cement industries. The material transport, because of material characteristics, cause severe wear on internal lining of chutes or bins’ structure. The wear problem on internal lining of bins or chutes needs to be checked to keep production efficiency. Therefore, not checked wear rate causes liner replacement schedule becomes unpredictable. It leads to production loss and highly cost maintenance in industry. This study shows that condition-based maintenance through regular thickness measurement using Ultrasonic Transducer (UT) to predict life service of critical liners prevent unplanned maintenance schedule. Data collected can be used to predict the next liner replacement schedule, cuts unplanned maintenance and breakdowns.
Correlation between Microstructure and Hardfacing Properties with Welding Current Intensity in Reconditioned Low-alloy Steel Material using Submerged Arc Welding (SAW) : A Comprehensive Review asmara, iman Nugraha; Winarto, Winarto
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

This review studying the correlation between microstructural transformations and mechanical properties in reconditioned low-allow steel material, focusing on the impact of Submerged Arc Welding (SAW) parameters, especially current, on microstructure . The study highlights how variation on welding parameters, especially current intensity variation, affecting microstructural transformations, hardness, and wear resistance of hardfaced layers. Key aspects such as dilution effect, phases distribution, and carbide formation are reviewed to understanding their impact on mechanical properties. By reviewing insights from existing literature and experimental findings, this review underscores the role of Submerged Arc Welding in enhancing mechanical properties and microstructural of low-alloy steel material.
Techno-Enviro-Economic Approach for Electrification of Rural and Shrimp Farming Regional Development of An Isolated Island in Indonesia by Utilizing Hybrid Renewable Energy Systems Wijaya, Fiqih Akbar; Indianto, Mohammad Akita
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

One of the challenges in developing and archipelagic countries such as Indonesia is maintaining energy demand in rural and isolated areas due to difficulties in electrical distribution. For instance, in areas like Bawean Island, no additional electricity capacity has been introduced in the past year, leading to an unmet potential customer demand. One of the possible options is by utilizing Hybrid Renewable Energy Systems (HRES) that are integrated with existing fossil fuel-based energy systems to support the growing energy demand in the remote island. A case study in Bawean Island is conducted with the projected energy demand covers the energy consumption for rural electricity and development for business and industry, in this case shrimp pond agriculture industry. The energy demand is projected until 2035 with increase needs for industry is an average of 5% to 7%. A techno-enviro-economic analysis utilizing Homer Pro software is conducted to determine the optimal configuration of energy systems. Three scenarios with different configurations of solar PV, wind turbines and existing fossil fuel-based grids are simulated. In scenarios I, II, and III, annual CO2 emissions are 33.6%, 37.16%, and 47.3% lower than in the Grid system. The technical and economic research shows that Scenario I, with a 10.5 MW grid configuration and 17.25 MW photovoltaic capacity system on 26.91 hectares of land, is the optimal implementation priority. Scenario I has the lowest LCOE (0,1580 $/kWh), highest NPV ($7.910.714), and shortest payback period (9 years 7 months). This indicates the potential to enhance productive sectors, particularly shrimp ponds.
Fire and Explosion Hazard Risk Analysis of Fuel Transfer Activities at Fuel Terminal “X” Utilizing the Quantitative Risk Analysis (QRA) Method Sulistyawan, Angga Wahyu; Yuliusman, Yuliusman
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Fuel transfer operations at Fuel Terminal ‘X’ constitute a critical stage in the energy supply chain, where complex interactions among human, technical, and environmental factors generate inherent risks of fire and explosion. The flammable nature of fuel oil, coupled with the possibility of vapor or liquid releases outcoming by tool failures, connection leaks, or control system malfunctions, underscores the need for robust and proactive risk management strategies. This study aims to evaluate and mitigate these risks by applying Quantitative Risk Assessment (QRA). The assessment utilized the Parts Count method to foercast generic component failure rates and Fault Tree Analysis (FTA) to classify potential failure pathways that could head to hazardous fuel release scenarios. Consequences were modeled with SAFETI software, enabling a detailed examination of thermal radiation spread by fires, overpressures by blasts, and the determination of risk exposure zones for human populations in the vicinity. Further application of control systems like gas leak detectors, flame detectors, and the automatic/manual shutdown and isolation systems reduced the IRPA to an acceptable risk level. These findings emphasize the importance of combining quantitative risk modelling and systematic safety barriers to improve the operational safety. It is anticipated that these results will support the preparation of risk assessment protocols and safety policy guidelines for fuel handling facilities in the oil and gas sector.
Remaining Life Assessment and Fitness for Service Evaluation of Aging Chemical Reactors in Polyethylene Terephthalate Resin Industry Munthe, Aditya Pahlawan; Dhaneswara, Donanta; Putra, Wahyuaji Narottama; Widyaputra, Gama
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Aging chemical reactors in the polyethylene terephthalate (PET) resin industry require comprehensive evaluation to ensure safe continued operation. This study conducts a remaining life assessment (RLA) and fitness-for-service (FFS) evaluation on five 30-year-old reactors, based on API 510, API 579/ASME FFS-1, and ASME BPVC Section VIII Div. 1 standards. The analysis involves corrosion rate measurement, future corrosion allowance (FCA) projection, and minimum thickness verification. Among the reactors, R-120 was found to have the shortest remaining life less than 15 years. FFS assessments using three criteria Average Measured Thickness, MAWP from Point Thickness Readings, and Minimum Measured Thickness confirm that R-120 meets all safety requirements. The head and shell thicknesses exceed the minimum allowable values; calculated MAWPr values are above the design MAWP; and thicknesses adjusted for FCA remain above 50% of the minimum required. These results indicate that R-120 remains fit for continued service. This study underscores the critical role of standardized assessment and routine inspection in extending the safe operating life of aging process equipment
Analysis of Leak Testing Planning for Carbon Dioxide Piping Systems in the Development of Carbon Capture, Utilization, and Storage Facilities in the Bintuni Basin Sentiani, Devi; Yuwono, Akhmad Herman, Professor
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Carbon Capture, Utilization, and Storage (CCUS) technologies have become a key strategic response to global efforts to reduce CO2 emissions. This study presents a leak testing strategy designed for a carbon dioxide (CO₂) piping system as part of a Carbon Capture, Utilization, and Storage (CCUS) project in the Bintuni Basin, West Papua, Indonesia. This study aims to ensure the system is properly prepared before commissioning by designing a leak test plan that is both practical and technical, based on ASME B31.3, ASME PCC-2, and API STD 520 Part 1. We conducted the process, which involves identifying the system boundaries, selecting the test medium, determining the test pressure, sizing the pressure relief valves, calculating the exclusion zone, and a qualitative risk assessment. The findings highlight the importance of performing a tightness test using nitrogen gas at 90% of the pipe's design pressure, especially for newly installed sections connected to existing LNG facilities. Based on technical analysis, this study provides a clear and applicable reference for field implementation of leak testing in CCUS projects.
Implementation of Reliability Centered Maintenance on Crude Booster Pump Hafizh, Dzulfikar Ali; Putri, Maya Agustianingrum, ST., Ph.D.; Rizal, D.; Qanita, Adzra
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Crude oil booster pump is one of the critical equipment in oil refinery operations. In aging plants that have been operating for more than 25 years, where reliability and maintenance issues on equipment often cause operational disruptions and even unplanned shutdowns. This study aims to develop a structured reliability-centered maintenance (RCM) strategy for crsude oil booster pump systems that is also in line with the principles of asset integrity management system (AIMS). This methodology follows the RCM II approach, starting with system function analysis, failure mode identification, and criticality assessment through Failure Mode, Effect, and Criticality Analysis (FMECA) to determine the Risk Priority Number (RPN) value that looks at the severity, occurrence, and detection rankings to support the priority and selection of maintenance tasks. The results of the study indicate that mechanical seal leakage and bearing wear are the most dominant failure modes, which contribute significantly to operational disruptions. Based on the RCM decision logic, the selected maintenance strategy includes condition monitoring and scheduled restoration tasks. These findings support the integration of RCM results into an asset management framework, which offers practical recommendations to improve pump reliability, reduce corrective maintenance, and support long-term plant availability goals.

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