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Oktaf Brillian Kharisma
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INDONESIA
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE)
Published by Institut Riset dan Publikasi Indonesia
ISSN : 27971155     EISSN : 27970868     DOI : https://doi.org/10.57152/ijeere.v2i1
Core Subject : Science, Social, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) is a scientific journal published by the Institute Research and Publication Indonesia (IRPI) in collaboration with several universities throughout Riau and Indonesia. IJEERE will be published 2 (two) times a year, June and December, each edition contains 15 (fifteen) articles. Articles can be written in Indonesian or English. articles are original research results with a maximum plagiarism of 20%. Articles submitted to IJEERE will be reviewed by at least 2 (two) reviewers. Articles submitted must meet the assessment criteria and comply with the instructions and templates provided by IJEERE. Authors must upload the Intellectual / Copyright Statement when submitting the manuscript. Papers must be submitted via the Open Journal System (OJS) in .doc or .docx format. The entire process until IJEERE is issued is free of charge. IJEERE is registered in National Library with Number International Standard Serial Number (ISSN) Printed: 2797-1155 and Online 2797 - 0868. The focus and scope of IJEERE includes: (a) Wireless Communication, (b) Optical Communication, (c) RF, Microwave, and Antenna Design, (d) • Telecommunication Networks, (e) Control Systems, (f) Nuclear New Energy, (g) Renewable Energy
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 68 Documents
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Design of a 5G Fixed Wireless Access (FWA) Network at 3.5 GHz Frequency in Urban Areas: A Case Study of Kambang Iwak Park, Palembang: Perancangan Jaringan 5G Fixed Wireless Access (FWA) pada Frekuensi 3.5 GHz di Area Urban: Studi Kasus Taman Kambang Iwak Palembang Melia Sari; Robi Prasetio; Abdul Haris Dalimunthe; Iwan Pahendra Saputra
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 5 No 2 (2025): IJEERE December 2025
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v5i2.2427

Abstract

The provision of fiber optic infrastructure in dense urban areas like Taman Kambang Iwak, Palembang, often faces constraints related to excavation permits and potential damage to city aesthetics. 5G-based Fixed Wireless Access (FWA) technology serves as a strategic alternative solution to deliver high-speed broadband access without requiring physical cable installation to the user's premises. This study aims to design a 5G FWA network utilizing the 3500 MHz frequency (Band n78) with a 100 MHz bandwidth. The design was conducted through simulation using RadioPlanner 3.0 software with the Okumura-Hatta propagation model tailored for urban environmental characteristics. Analyzed parameters included signal coverage based on Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ) and data capacity (throughput). Simulation results indicate that the design scenario using three sectoral antennas is capable of providing "Good" category signal coverage in the target area. In terms of data performance, the system achieves a maximum downlink throughput of up to 750 Mbps and uplink ranging from 500 Mbps to 750 Mbps. (Discussion) Based on these results, the implementation of 5G FWA at the 3.5 GHz frequency is proven feasible and meets the standards for high-speed data service requirements in the Taman Kambang Iwak area..
The Studi Potensi Pendingin Evaporatif untuk Penyimpanan Ikan di Pasar Tradisional: Studi Potensi Pendingin Evaporatif untuk Penyimpanan Ikan di Pasar Tradisional Hermila Gemah
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 5 No 2 (2025): IJEERE December 2025
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v5i2.2433

Abstract

Penelitian ini bertujuan untuk menganalisis potensi penggunaan pendinginan evaporatif sebagai metode penyimpanan ikan alternatif bagi pedagang di Pasar Panorama, Kota Bengkulu. Latar belakang penelitian ini didasarkan pada permasalahan penyimpanan ikan di pasar tradisional yang mengandalkan es batu, sementara kondisi lingkungan yang panas dan lembap mempercepat pencairan es dan menurunkan kualitas ikan. Penelitian ini menggunakan metode deskriptif kualitatif melalui observasi lapangan langsung dan studi literatur terkait konsep termodinamika dan penerapan pendinginan evaporatif pada bahan pangan. Hasil observasi menunjukkan bahwa es batu mencair dengan cepat akibat suhu pasar yang tinggi dan sirkulasi udara yang minim. Studi literatur menunjukkan bahwa pendinginan evaporatif dapat menurunkan suhu lingkungan melalui proses penguapan air dan menciptakan kondisi penyimpanan yang lebih dingin dan stabil. Meskipun tidak dapat mencapai suhu dingin yang ideal untuk ikan, pendinginan evaporatif berpotensi sebagai sistem yang memperlambat pencairan es, menghambat kenaikan suhu, dan membantu menjaga kesegaran ikan lebih lama. Kesimpulan penelitian menunjukkan bahwa pendinginan evaporatif layak dipertimbangkan sebagai teknologi tepat guna yang mendukung penyimpanan ikan di pasar tradisional, mengurangi penggunaan es batu, dan mengurangi biaya operasional pedagang.
Valuation and Action Recommendations on the Control Panel of PT Bukaka Teknik Utama Duri's Pumping Unit Using Failure Mode and Effect Analysis (FMEA) : Valuasi dan Rekomendasi Tindakan Pada Panel Kontrol Pumping Unit PT Bukaka Teknik Utama Site Duri Menggunakan Failure Mode and Effect Analysis(FMEA) Putut Son; Alif Miratul Ansyari; Elva Susianti
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 5 No 2 (2025): IJEERE December 2025
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v5i2.2459

Abstract

PT Bukaka Teknik Utama Site Duri is a company engaged in the oil and gas equipment sector and collaborates with PT Chevron Pacific Indonesia in managing sucker rod pump type pumping units for crude oil extraction processes. The pumping units are powered by 75 HP electric motors that are controlled and monitored through a control panel. The control panel plays an important role in maintaining operational reliability and safety as it is equipped with various protection components, such as overload, over voltage, over current, and thermal protection. However, based on operational data, there are still control panel malfunctions that cause pump operations to stop and daily oil production targets to not be achieved, as well as increasing the risk of damage to the drive motor. This study aims to conduct a risk assessment and provide recommendations for improvements to the pumping unit control panel using the Failure Mode and Effect Analysis (FMEA) method. The FMEA analysis results show that the contactor and overvoltage components have the highest risk levels, while the fuse and MCB have the lowest risk levels. The recommended actions include replacing components with higher specifications and implementing preventive measures such as repairing the grounding system and adding protection against moisture and dust. The implementation of these recommendations is expected to reduce the failure rate and improve the reliability of the control panel in the next operational period.
Analisis Potensi Energi Listrik dan Ekonomis Biogas dari Ampas Kelapa Provinsi Riau: Analisis Potensi Energi Listrik dan Ekonomis Biogas dari Ampas Kelapa Provinsi Riau Nanda Putri Miefthahwati nanda
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 5 No 2 (2025): IJEERE December 2025
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v5i2.2467

Abstract

BPS data from 2021 states that coconut production in Indonesia is the largest in the world, with a total production of 988.3 thousand tonnes of coconuts. The largest coconut production comes from Riau Province, with a production of 1,100 tonnes. Generally, coconuts are used to make coconut milk, leaving behind coconut pulp as waste. This waste is considered garbage because it no longer has any beneficial value, so it is disposed of directly. This disposal has an impact on the environment because biomass waste that is disposed of directly will cause a foul odour and methane gas emissions that are 20 times more harmful than CO2 emissions, even though coconut husk waste contains nutrients that can be processed into a new energy source in the form of biogas. This research aims to analyse the biogas potential that can be generated from coconut husk waste, including the potential for electricity generation and its economic analysis. This research uses the anaerobic respiration method to produce biogas in an anaerobic digestion reactor simulated using the SuperPro Designer application. From the research conducted, it was found that the potential biogas that can be produced from coconut husk waste in a year in Riau Province is 15,321,231.9 m3, which is obtained from 134 tonnes of coconut husk waste in Riau Province in 2021. In addition, the biogas produced is capable of generating 141,703,473 kWh of electricity per year, with a potential revenue of Rp. 212,555,209,500 and an annual profit of Rp. 163,532,903,700. With a B/C ratio of 1.26 and a payback period of 9.6 months, it can be said that this investment is profitable and feasible to be realised.   Keyword: Biogas, Coconut Waste, Electricity, Economics.
Analisis Konsumsi dan Produksi Energi Kebun Hidroponik Tenaga Surya di Desa Lenek Lombok Timur : Analisis Konsumsi dan Produksi Energi Kebun Hidroponik Tenaga Surya di Desa Lenek Lombok Timur Alimin; Muhammad Nurswal Isnani; Yuliani Hasni; Rizkia Rahmawati; Muji Juherwin
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 6 No 1 (2026): IJEERE Juni 2026
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v6i1.2456

Abstract

The utilization of solar energy in hydroponic systems offers a potential solution to reduce dependence on conventional electricity and lower operational costs. This study aims to analyze the balance between energy consumption and production in a solar-powered hydroponic farm located in Lenek Daya Village, East Lombok Regency. The system consists of two 80 Wp solar panels, a 4 × 4.2 W water pump, a light sensor, and a 12 V 100 Ah battery for energy storage. The research method includes daily measurement of energy production and consumption over one month, as well as 10-minute interval monitoring for three consecutive days to capture short-term energy dynamics. The results show that daily energy production ranges from 200 to 350 Wh, while energy consumption remains relatively stable between 100 and 200 Wh. The production profile follows a diurnal pattern, with peak power occurring between 11:30 and 14:00. Overall, the solar panels sufficiently meet the system’s energy requirements, even generating a surplus under clear weather conditions. However, weather fluctuations significantly affect daily production, highlighting the important role of energy storage in ensuring continuous operation. This study concludes that the implementation of solar-powered hydroponic systems is feasible and efficient, supporting sustainable agricultural operations in rural areas.
Perencanaan PLTS Off-Grid Menggunakan HOMER pada Gedung Operasional BTP Kelas II Padang: Perencanaan PLTS Off-grid Menggunakan HOMER pada Gedung Operasional BTP Kelas II Padang Zakki Ahmad Ulinnuha
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 6 No 1 (2026): IJEERE Juni 2026
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v6i1.2550

Abstract

The increasing demand for electrical energy and the high dependence on fossil fuels encourage the use of sustainable renewable energy, especially solar energy. Padang Pariaman Regency has high solar energy potential with an average solar radiation of 4.62 kWh/m²/day, so the implementation of an off-grid Solar Power Plant (PLTS) system is the right solution to support energy independence and reduce carbon emissions. This study aims to analyze the planning of an off-grid PLTS system at the Operational Building of Balai Teknik Perkeretaapian (BTP) Kelas II Padang from technical and economic aspects and evaluate its investment feasibility. The research methods include literature studies, field observations, and collection of primary and secondary data in the form of electrical load profiles, solar radiation data, and PLTS component specifications, which are analyzed through manual calculations and simulations using HOMER (Hybrid Optimization Model for Multiple Energy Resources) software. The analysis results show that both methods produce relatively comparable system configurations. Technically, the off-grid solar power system is designed with a solar panel capacity of 39,4 kW based on manual calculations and 45,2 kW based on HOMER software simulations, both of which are capable of meeting daily energy needs of 169,5 kWh with the support of a battery capacity of ±340 kWh that provides autonomy time of up to 48 hours and an inverter capacity of 80 kW which is above the peak load of 52,245.50 W. From an economic aspect, manual calculations produce a Net Present Cost (NPC) value of IDR 1,606,156,628 with a Cost of Energy (COE) of IDR 1,327/kWh, while the HOMER simulation produces an NPC of IDR 1,624,727,000 with a COE of IDR 1,405/kWh. Both methods show a positive NPV value, a Profitability Index greater than one, and a Discounted Payback Period below the project life, so that the off-grid solar power system is declared technically and economically feasible.
Real-Time Server Room Temperature and Visual Surveillance Monitoring Using ESP32-CAM Integrated with DHT22 Sensor: Sistem Monitoring Suhu dan Keamanan Ruang Server Secara Real-Time dengan ESP32-CAM dan Sensor DHT22 Melia Sari
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 6 No 1 (2026): IJEERE Juni 2026
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v6i1.2794

Abstract

Server rooms are critical information technology infrastructures where uncontrolled temperature fluctuations can cause permanent hardware damage. The ASHRAE TC 9.9 standard recommends server room temperatures within the range of 18°C–27°C; however, many mid-scale institutions lack integrated real-time temperature and visual monitoring systems. This study designs and implements an ESP32-CAM-based server room monitoring system integrating a DHT22 temperature sensor with a real-time web interface and a threshold-based alarm mechanism. The system was developed using an experimental approach, encompassing sensor accuracy testing, alarm response evaluation, data transmission latency measurement, and operational reliability testing. Test results show that the DHT22 sensor has an average temperature measurement error of 1.18% over the 20°C–35°C range, with an RMSE of 0.177°C. The system detects critical temperature threshold breaches (35°C) with an average latency of 1.9 seconds and automatically activates a local buzzer alarm. Data transmission latency on a local LAN reaches 110–160 ms with video streaming at 15–20 FPS at 640×480 pixel resolution. System uptime reached 99.7% during 24-hour operational testing, including power outage scenarios supported by a mini UPS module. The developed system proves capable of providing early warning against critical thermal conditions at a low-cost component making it a comprehensive low-cost solution suitable as an alternative Building Management System (BMS) for budget-constrained institutions.
Trusted Hardware, Untrusted Operators: An Insider-Enabled Threat Taxonomy for National Computer-Based Testing Infrastructure: Perangkat Keras Terpercaya, Operator Tak Terpercaya: Taksonomi Ancaman Berbasis Orang-Dalam untuk Infrastruktur Ujian Nasional Berbasis Komputer Mulkan Fadhli
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 6 No 1 (2026): IJEERE Juni 2026
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v6i1.3148

Abstract

The security literature on computer-based testing (CBT) has developed almost entirely around remote proctoring, where the threat model assumes untrusted examinee-owned hardware operating in an uncontrolled environment. This framing treats institution-controlled hardware under physical invigilation as a secure baseline. We argue this assumption is unsound, substantiating the argument with evidence from Indonesia's national university entrance examination (UTBK-SNBT), a high-stakes CBT administered to 871,496 registered candidates in 2026 (846,518 present) across a distributed network of state-university testing centres. Drawing on publicly documented incidents from the 2025 and 2026 administrations, we reconstruct two organised attacks in which institution-controlled examination hardware was compromised despite physical proctors, metal detectors, and closed-circuit surveillance. In the first, campus IT staff with legitimate administrative privileges installed remote-access software on examination workstations; nine suspects were charged under Articles 30 and 32 of the Electronic Information and Transactions Law. In the second, a covert proxy appliance comprising two mini PCs, a router, and an uninterruptible power supply was concealed within a printer carton approximately six months before the examination. From these incidents we derive a five-class threat taxonomy and construct a STRIDE-based threat model mapped to MITRE ATT&CK. We show that the only control demonstrably effective against the most sophisticated attack was network-layer anomaly detection, whereas the perimeter controls emphasised in policy discourse failed by design. We conclude that trusted-hardware CBT constitutes a distinct, under-theorised threat model, and we outline a research agenda for its systematic study.

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