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INDONESIA
Journal Of Renewable Energy Engineering
Published by Universitas Negeri Gorontalo
ISSN : 29861063     EISSN : 2988554X     DOI : 10.56190
Core Subject : Science, Engineering,
Energy Engineering
Journal Of Renewable Energy Engineering (JREE) is a peer-reviewed journal published twice a year (April and October) by the Vocational Program of the State University of Gorontalo. The Vocational Journal of Science and Technology provides direct open access to its content. The aim of this journal is to provide the expression of ideas, as well as places for knowledge fields that can understand applied science and technology issues and knowledge, with a new space of journals covering the fields of science and technology. applied science and technology research including Mathematics, Physics, Technology, and Informatics
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 50 Documents
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PROSES PERANCANGAN ALAT SIMULATOR PNEUMATIC DOUBLE ACTING CYLINDER DENGAN DUA BATANG PISTON MASUK DAN KELUAR Andi, Andi Ariansyah
Journal Of Renewable Energy Engineering Vol. 3 No. 2 (2025): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v3i2.51

Abstract

A pneumatic system uses compressed air to produce pressure and provide motion. This system was invented in 1889 by Macron Matic. The pneumatic system simulator tool employs a double-acting cylinder. This research employs engineering design methods to design, manufacture, and test a simulator featuring a double-acting cylinder and two piston rods, enabling manual simulation of piston movement. Results show that among four pressure levels tested, higher air pressure decreases the time required for the piston to retract. However, as pressure increases, the time-saving efficiency lessens. Therefore, choosing an optimal pressure is essential to achieve performance without risking damage to system components. The decrease in time between 3 and 4 bars is smaller than between 1 and 2 bars, indicating that higher pressure yields diminishing returns in piston movement speed. Friction, airflow resistance, and discharge valve efficiency affect the piston's reverse stroke at elevated pressures.  
Perbandingan Kinerja dan Inovasi Material Isolator Listrik: Tinjauan Komprehensif terhadap Faktor Lingkungan, Komposisi Material, dan Metodologi Evaluatif septiyusi, Natia nursuci; Tobuhu, Gilang; Astika putra, I Nengah dwi; Abdullah, Rafli S; Abbas, zulkarnain; Ilham, Jumiati; Hidayat, Ikhsan
Journal Of Renewable Energy Engineering Vol. 3 No. 2 (2025): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v3i2.54

Abstract

Electrical insulators are vital components in power transmission and distribution systems. The performance of insulators is significantly influenced by environmental conditions, including humidity, pollution, and temperature, as well as their material composition. This study reviews several recent scientific publications related to the performance of ceramic, polymer, and composite insulators under various environmental conditions. The analysis indicates that environmental contamination significantly reduces insulator performance, whereas industrial and agricultural waste-based materials, such as rice husk ash (RHA) and fly ash, offer considerable potential as innovative, environmentally friendly solutions. Experimental and simulation methods play a crucial role in understanding the electrical characteristics of insulators.
ANALISIS KEANDALAN SISTEM JARINGAN DISTRIBUSI 20 KV PENYULANG BP1 DI PT.PLN (PERSERO) UP3 GORONTALO DENGAN METODE SECTION TECHNIQUE Polingala, Reynaldi; Harun, Ervan Hasan; Yusuf, Taufik Ismail
Journal Of Renewable Energy Engineering Vol. 3 No. 2 (2025): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v3i2.59

Abstract

One of the important factors and main indicators of the quality of electricity supply services from the system to customers is the reliability of the distribution network. Frequent disruptions to the distribution network can reduce the reliability of electricity distribution. Based on data obtained from PLN UP3 Gorontalo, the BP1 feeder is a vulnerable area that experiences the most frequent service disruptions, with a total of 96 disruptions during 2023. This study aims to determine the reliability index value of the 20 kV distribution system for the BP1 feeder using the section technique, and to determine the undistributed energy and the losses incurred due to blackouts in the BP1 feeder. The method used in this study is the section technique, which evaluates a distribution system by assessing how the failure of a piece of equipment affects its operation. The results of the study show that the reliability index for the BP1 feeder in 2023 is SAIFI of 15.43 times/customer/year, SAIDI of 3.61 hours/customer/year, and CAIDI of 0.23 hours/customer. From these results, it can be concluded that the SAIFI value for the BP1 feeder is not yet reliable, as it does not meet the SPLN 68-2:1986 standard of 3.2 times/year. Meanwhile, the SAIDI value of the BP1 feeder is reliable because it meets the SPLN 68-2:1986 standard value of 21.09 hours/year. The unsupplied energy (ENS) is 18,809.81 kWh, so the loss value for the BP1 feeder in 2023 is Rp. 30,933,106.55.
ANALISIS PENGARUH SUDUT DATANG CAHAYA MATAHAHARI TERHADAP DAYA KELUARAN PANEL SURYA Kadir, Moh. Fitran; Harun, Ervan Hasan; Ilham, Jumiati
Journal Of Renewable Energy Engineering Vol. 3 No. 2 (2025): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v3i2.60

Abstract

Indonesia's rising energy needs push the adoption of solar energy to reduce fossil fuel use. This study analyzes how sunlight's incident angle affects the output power of polycrystalline solar panels. It also determines the optimal angle for efficiency. A quantitative experiment used two panel setups: a mobile panel set at 90° and a fixed panel that tracked natural angle changes (07:00–17:00 WITA). Over seven days in Gorontalo, voltage, current, power, light intensity, panel temperature, air temperature, and humidity were measured. Results showed that the incident angle greatly influenced output power. The mobile panel produced a maximum power of 8.13 W at an intensity of 8.7846 W/m2 (09:30). The fixed panel peaked at 6.76 W at a 69° angle (12:00). For the fixed panel, the optimal angle ranged from 50° to 70°. Efficiency dropped when panel temperature exceeded 50 °C. In general, mobile panels provided higher and more stable performance. This highlights the value of a solar tracking system or determining the optimal angle to boost efficiency and support national energy security.
THERMAL MANAGEMENT AT THE ENERGY WATER ENVIRONMENT NEXUS: FROM PHOTOTHERMAL MATERIALS AND BUILDING ENVELOPES TO GRIDRESPONSIVE ENERGY SYSTEMS Djamalu, Yunita; Djafar, Romi; Fauziah, Siti; Pakaya, Roys
Journal Of Renewable Energy Engineering Vol. 3 No. 2 (2025): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v3i2.61

Abstract

Thermal phenomena sit at the heart of today’s most important sustainability challenges, producing clean water, maintaining healthy indoor climates, valorizing biomass, and balancing increasingly variable power grids. This review synthesizes state-of-the-art advances across materials, devices, buildings, and energy systems to outline an integrated research agenda for the energy–water–environment nexus. We highlight photothermal platforms for desalination and wastewater treatment, including macroporous three-dimensional MXene architectures with high broadband absorption and near-complete contaminant rejection, a nature-inspired “suspended” evaporator that resists salt accumulation even in 15–20 wt% brines, and scaling-mitigating slippery membranes for robust membrane distillation (Lan, Wood, & Yuen, 2019), (Zhao et al., 2019), (Islam et al., 2020). For the built environment, we analyze optimization of phase-change Trombe walls, localized solid-state humidity pumping, evidence-based thermal comfort indices, and holistic multi-objective design of net-zero energy housing in the tropics (Zhang et al., 2022; Tumuluru, Ghiasi, Soelberg, & Sokhansanj, 2021), (Luo et al., 2021; Mani et al., 2023). On the supply side, we assess rapid load transitions in solid-oxide-fuel-cell–gas-turbine hybrids, optimization-driven power-flow management, and thermal-pollution constraints on water-cooled generation (Staiger, Laschewski, & Matzarakis, 2019),(Zhu et al., 2021; Li, Hua, Tu, & Wang, 2019). Finally, we connect circular carbon strategies torrefaction and biochar to both energy quality and environmental remediation (Karanikola, Boo, Rolf, & Elimelech, 2018), (Miara et al., 2018). We conclude with cross-cutting gaps in durability, field validation, and multi-scale modeling, and propose harmonized metrics and standardized protocols to accelerate translation. All citations derive from the user-provided corpus.
ANALISIS PENGARUH SUHU TERHADAP KINERJA OUTPUT PANEL FOTOVOLTAIK DI PLTS 2 MWp SUMALATA Zul Hamid Ansyor; Burhan Liputo; Jumiati Ilham; Siti Fauziah
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v4i1.77

Abstract

Kinerja sistem fotovoltaik sangat dipengaruhi oleh modul suhu permukaan yang berpengaruh terhadap daya keluaran sistem. Penelitian ini bertujuan untuk menganalisis hubungan antara suhu permukaan modul berdasarkan pengukuran kamera termal ( Rata-rata TIR ) terhadap daya keluaran DC sistem PLTS on-grid berkapasitas 2 MWp di PLTS Sumalata. Pengambilan data dilakukan melalui observasi lapangan menggunakan kamera termal untuk memperoleh modul suhu rata-rata permukaan serta data daya DC dari sistem monitoring operasional PLTS selama periode pengamatan bulan November. Data yang diperoleh dijelaskan menggunakan pendekatan grafis untuk mengetahui pengaruh suhu terhadap kinerja sistem. Hasil penelitian menunjukkan bahwa modul suhu permukaan berada pada rentang 45.6 °C hingga 57.3 °C dan peningkatan modul suhu cenderung menyebabkan penurunan kinerja relatif daya keluaran sistem akibat karakteristik koefisien suhu negatif modul fotovoltaik. Hasil penelitian ini menunjukkan bahwa modul suhu permukaan berkontribusi terhadap kehilangan panas sehingga dapat digunakan sebagai parameter evaluasi kinerja operasional sistem PLTS skala utilitas.
A KALIBRASI TEGANGAN SENSOR INA219 PADA SISTEM ENERGI TERBARUKAN MENGGUNAKAN REGRESI LINEAR SEDERHANA BERBASIS GOOGLE COLAB Shyndi Febrina Hutabalian
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A power supply is a primary electrical source for electronic systems, and its voltage accuracy is essential for maintaining stable system performance. This study aims to calibrate and evaluate the voltage accuracy of a power supply using the INA219 sensor via a simple linear regression implemented in Google Colab. The novelty of this study lies in integrating the INA219 sensor, simple linear regression, and the open-source Google Colab platform into a practical, low-cost, and easily reproducible calibration workflow. The results show a very strong linear relationship between the power supply voltage and both the INA219 sensor and the digital multimeter, with a coefficient of determination (R²) of 1.00 in both cases. Measurements using the INA219 yielded an average error of 0.04 V, an RMSE of 0.00409 V, and an accuracy of 99.93%, while the digital multimeter yielded an RMSE of 0.002954 V with the same accuracy. These findings indicate that both instruments exhibit excellent linearity and precision, although the digital multimeter shows slightly higher measurement consistency. Overall, the INA219 sensor is proven to be a reliable low-cost alternative for voltage measurement with high accuracy and has strong potential for application in electronic testing and renewable energy systems.  
TECHNO-ECONOMIC ASSESSMENT OF A GRID-CONNECTED WIND POWER PLANT IN WESTERN AFGHANISTAN Hikmatullah Mayar
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Afghanistan suffers from chronic electricity shortages, currently importing approximately 70% of its power from neighboring nations. This research presents a techno-economic evaluation of a utility-scale, grid-connected wind power plant in the Zinda Jan district of Herat province. Utilizing wind speed data from the Global Wind Atlas and optimization via HOMER Pro software, the study identifies a robust wind regime with average annual speeds reaching 7.25 m/s at a 100 m hub height. The proposed 5 MW configuration achieves an annual electricity generation of approximately 29.25 GWh with an exceptional capacity factor of 66.8%. Economically, the project demonstrates a simple payback period of eight years and a Net Present Cost (NPC) of $14.0 million. These results suggest that localized wind power can significantly enhance energy security and reduce reliance on fragile import chains.
SISTEM PENGERING HIBRIDA BERBASIS IOT DENGAN PENYIMPANAN PANAS UNTUK OPTIMALISASI ENERGI, KUALITAS PRODUK, DAN REDUKSI DAMPAK LINGKUNGAN TERMAL: ARTIKEL REVIEW Yunita Djamalu; Romi Djafar; Arifin Matoka
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v4i1.65

Abstract

Post-harvest drying remains a critical point in the agricultural commodity value chain as it determines the rate of moisture loss, physical-chemical quality, microbiological stability, energy consumption, and environmental emissions. In the last decade, the direction of technology development has shifted from passive solar dryers to hybrid drying systems that combine greenhouses, solar collectors, thermal energy storage, auxiliary heat sources, and Internet of Things (IoT)-based monitoring and control. This review article reorganizes and updates the literature on IoT-based hybrid drying systems, focusing on five key dimensions: system architecture, heat storage media, intelligent monitoring and control, drying performance and kinetics, and economic and environmental implications. The synthesis shows that hybrid configurations consistently increase drying chamber temperature, improve heat distribution uniformity, shorten drying time, and maintain product quality compared to open drying or non-hybrid systems. The integration of sensible, latent, or a combination of both has been shown to extend the drying period during periods of decreased solar radiation and stabilize the thermal conditions of the process. At the same time, IoT enables real-time monitoring of temperature, relative humidity, airflow velocity, and equipment safety status, opening the door to more adaptive predictive control. From a sustainability perspective, recent literature shows that hybrid systems can reduce conventional energy consumption, improve exergy indicators, and deliver economic benefits through operational cost savings and potential reductions in carbon emissions. This review emphasizes that future research agendas must move beyond simply increasing drying temperatures to multi-objective optimization that integrates product quality, energy efficiency, control reliability, and environmental impact.  
INVESTIGATION OF WAVE RUN-UP ON AN OVERTOPPING BREAKWATER IN RELATION TO WAVE ENERGY CONVERSION A. Ildha Dwi Puspita; Muhammad Arsyad Thaha
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v4i1.66

Abstract

Wave run-up on coastal structures plays an important role in overtopping processes, which are relevant to the performance of overtopping wave energy converter (OWEC) systems. This study aims to investigate the characteristics of wave run-up on an overtopping breakwater with a double-slope configuration under regular wave conditions. The experiments were conducted in a two-dimensional wave flume using variations of wave period (0.9 s, 1.1 s, and 1.3 s) and water depth (0.15 m, 0.17 m, and 0.19 m). Wave heights were controlled by adjusting the stroke of a flap-type wave generator, producing waves in the range of 4–6 cm. Wave parameters were analyzed in terms of wave steepness (), while run-up was expressed as relative wave run-up (). The results show that wave steepness has an inverse relationship with relative wave run-up, where lower steepness leads to higher run-up values. Longer wave periods produce greater run-up due to increased wave energy, while shallower water depth enhances run-up due to wave shoaling effects. These findings indicate that wave conditions characterized by low steepness, long periods, and shallow water depth are favorable for increasing wave run-up on overtopping breakwaters, which is beneficial for improving the hydraulic performance of OWEC systems.

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